Chandra proposals are divided into the following categories:
***********************************************************************************
SOLAR SYSTEM
--------------------------------------------------
===================================================================================
Proposal Number: 02100065
Proposal Title: ASTEROID OBSERVATION
PI: GORDON GARMIRE
Subject Category: SOLAR SYSTEM
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
08:03:50.98 +12:34:32.52 1998 WT24 ACIS-S NONE 3.30
08:04:21.04 +12:23:44.99 1998 WT24 ACIS-S NONE 3.30
08:04:50.29 +12:11:54.56 1998 WT24 ACIS-S NONE 3.30
===================================================================================
Proposal Number: 02100129
Proposal Title: GRB OBSERVATION
PI: GORDON GARMIRE
Subject Category: SOLAR SYSTEM
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
GRB ACIS-I NONE 80.00
===================================================================================
Proposal Number: 02100164
Proposal Title: MARS - A PLANETARY ANALOG TO A COMET
PI: KONRAD DENNERL
Subject Category: SOLAR SYSTEM
Abstract: The discovery of unexpectedly bright X-ray emission from comets has led
to increased interest in X-ray studies of solar system objects. It has
demonstrated that even in our immediate astronomical environment surprises may be
waiting to be discovered. With its carbon and oxygen rich atmosphere and the
absence of a strong magnetic field, Mars represents a planetary analog to a
comet. Soft X-ray observations provide a sensitive tool to study the tenuous
outer regions of such atmospheres for outgassing effects and interactions with
the solar wind. Chandra is the first imaging X-ray satellite which is able to
observe Mars at opposition, when it is closest to Earth.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
17:00:33.95 -26:56:00.13 MARS ACIS-I NONE 30.00
===================================================================================
Proposal Number: 02100148
Proposal Title: THE MORPHOLOGY OF JOVIAN X-RAYS AND SUPPORT OF THE CASSINI FLYBY
OF JUPITER
PI: G. GLADSTONE
Subject Category: SOLAR SYSTEM
Abstract: We propose HRC-I observations of Jupiter's x-ray emissions. At 10 times
the spatial resolution of existing observations, the Chandra data will allow: 1)
latitudinal location of the x-ray relative to far-ultraviolet auroral emissions,
which will allow confirmation of the x-ray magnetospheric source region; 2)
separation of the two sources of low-latitude x-rays (radiation-belt particle
precipitation and solar x-ray fluorescence), establishing their relative
importance, and the mapping of high-order B-field components; 3) a search for
lightning-generated x-ray emissions from high-shear zones in the lower
atmosphere. The observations will be part of an extensive campaign during the
Cassini flyby of Jupiter, including 35 HST orbits, which will greatly enhance the
science yield of the data.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
04:06:39.20 +20:00:08.65 JUPITER HRC-I NONE 36.00
===================================================================================
Proposal Number: 02100340
Proposal Title: X-RAY SPECTROSCOPY OF COMET C/1999 T1
PI: VLADIMIR KRASNOPOLSKY
Subject Category: SOLAR SYSTEM
Abstract: The generation of X-rays in comets is a new puzzling phenomenon. We
propose a spectroscopic study of X-rays in comet C/1999 T1 at E>0.15 keV using
ACIS-S for 19 ksec. We have obtained the EUVE spectra of comet Hyakutake (that
was powerful and exceptionally close) up to 0.15 keV with resolving power of 10
and signal-to-noise ratio of 15. Comets are very extended sources, therefore the
resolving powers of ACIS-S and HRC-S/LETG are similar (3.5 and <6 for C/1999
T1)in the range of 0.15-0.85 keV, while the ACIS-S effective area is better by a
factor of 30. This proposal is directly related to NASA's programs for both X-ray
astronomy and solar system science and is a continuation of our study of X-ray
emission from comets which has engendered a broad response in scientific
community and public
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
15:17:51.30 -06:57:30.42 C/1999 T1 ACIS-S NONE 3.40
15:21:48.97 -05:46:43.32 C/1999 T1 ACIS-S NONE 3.40
15:29:06.91 -03:35:28.86 C/1999 T1 ACIS-S NONE 3.40
15:32:26.79 -02:35:50.93 C/1999 T1 ACIS-S NONE 3.40
15:34:27.99 -01:56:55.50 C/1999 T1 ACIS-S NONE 3.40
***********************************************************************************
NORMAL STARS AND WD
--------------------------------------------------
===================================================================================
Proposal Number: 02200030
Proposal Title: HIGH-RESOLUTION SPECTRUM OF UX ARI
PI: ALBERT BRINKMAN
Subject Category: NORMAL STARS AND WD
Abstract: We plan to study the soft X-ray spectrum of the stellar coronal source
UX Ari and its time variability.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
03:26:35.40 +28:42:54.50 UX ARI HRC-S LETG 120.00
===================================================================================
Proposal Number: 02200045
Proposal Title: COLLIDING STELLAR WINDS IN IOTA ORIONIS.
PI: CLAUDE CANIZARES
Subject Category: NORMAL STARS AND WD
Abstract: IOTA Orionis is an early type binary system consisting of two O-type
stars. This system is one of the prototypes for the possible existence of
colliding winds. The X-rays are thought to be generated in cooling zones behind
shock fronts in the winds. Models show that X-ray emission is extremely dependent
on the amount of cooling in the shock flow. Fits to ROSAT data show that
post-shock temperatures assuming cooling layers behind the shocks instead of
isothermal shocks result in significantly higher post shock temperatures. The
highly resolved X-ray spectrum of IOTA Orionis will provide direct measures for
post shock tempertures and densities to test current models. It may also help to
understand the unusually hot spectrum observed previously in Theta Ori.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
05:35:26.00 -05:54:35.00 IOTA ORIONIS ACIS-S HETG 11.00
05:35:26.00 -05:54:35.00 IOTA ORIONIS ACIS-S HETG 39.00
===================================================================================
Proposal Number: 02200047
Proposal Title: HIGH-RESOLUTION SPECTROSCOPY OF ACTIVE COOL STARS
PI: CLAUDE CANIZARES
Subject Category: NORMAL STARS AND WD
Abstract: The cool, active binary stars have a forest of coronal emission lines.
These prominent features, along with any continuum emission, are diagnostics of
the temperature and density structure of coronae, abundances, and geometric
extent. Eclipse modulation can provide a direct measurement of coronal geometry.
TY Pyx is a 3-day period near-totally eclipsing RS CVn system. We will obtain
HETG spectra through the primary eclipse to obtain phase-resolved coronal
diagnostics.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
08:59:42.70 -27:48:58.70 TY PYX (HD77137) ACIS-S HETG 50.00
===================================================================================
Proposal Number: 02200056
Proposal Title: OBSERVATION OF MASSIVE BINARY
PI: GORDON GARMIRE
Subject Category: NORMAL STARS AND WD
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
05:35:08.28 +09:56:03.00 LAMBDA ORIONIS ACIS-I NONE 10.00
===================================================================================
Proposal Number: 02200057
Proposal Title: OBSERVATION OF BROWN DWARF
PI: GORDON GARMIRE
Subject Category: NORMAL STARS AND WD
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
11:31:55.40 -34:36:27.00 TWA-5 ACIS-S NONE 10.00
===================================================================================
Proposal Number: 02200061
Proposal Title: OBSERVATION OF M17
PI: GORDON GARMIRE
Subject Category: NORMAL STARS AND WD
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
18:20:29.90 -16:10:45.50 M17 ACIS-I NONE 40.00
===================================================================================
Proposal Number: 02200064
Proposal Title: OBSERVATION OF M-DWARF SYSTEM
PI: GORDON GARMIRE
Subject Category: NORMAL STARS AND WD
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
19:53:54.80 +44:24:54.00 G208-45 ACIS-I NONE 5.00
===================================================================================
Proposal Number: 02200073
Proposal Title: HETG OBSERVATIONS OF THE K GIANT BETA CETI
PI: JEFFREY LINSKY
Subject Category: NORMAL STARS AND WD
Abstract: Beta Ceti (HD 4128) is the brightest K giant as seen in X-rays. This K0
III post helium flash star is unusually luminous in X-rays compared to other
clump giants. The high X-ray luminosity may be due to its age or to a rejuvenated
dynamo as a result of angular momentum redistribution in its core. We propose a
deep (88 ks) HETG observation to measure the coronal temperature structure,
coronal densities, and coronal abundances of this unusual star.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
00:43:35.40 -17:59:11.80 BETA CETI ACIS-S HETG 88.00
===================================================================================
Proposal Number: 02200080
Proposal Title: EMISSION FROM LATE-TYPE STAR AD LEO
PI: STEPHEN MURRAY
Subject Category: NORMAL STARS AND WD
Abstract: Our proposed program to understand the x-ray emission from late-type
stars will address three important issues: i) establish whether the "solar
analogy" is invariably appropriate (and under what circumstance it may not
apply), ii) determine coronal characteristics and their dependence on the
properties of the underlaying stars (including rotations, color, and
metallicity), and iii) understand the variation of activity levels at the
low-mass end of the main sequence, where the convection zone may penetrate to
near the stellar center.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
10:19:36.92 +19:52:12.20 AD LEO HRC-S LETG 50.00
===================================================================================
Proposal Number: 02200099
Proposal Title: IS THE HOT DO WHITE DWARF KPD0005+5106 REALLY A CORONAL X-RAY
SOURCE?
PI: STEPHEN MURRAY
Subject Category: NORMAL STARS AND WD
Abstract: We will observe the hot DO white dwarf KPD0005+5106 with the Chandra
LETG to conclusively show whether or not the X-ray emission arises from a coronal
plasma. If the emission is merely photospheric, then the spectrum will form a
continuum possibly including absorption features from heavy elements in the
atmosphere. In contrast, a coronal plasma will generate an emission line
spectrum. If this hypothesis is finally prove, this white dwarf will be
completely unique as the only coronal degenerate star detected in the soft X-ray
band. Such a source probably arises from a hot wind, or interaction of a wind
with surrounding circumstellar material. A detailed analysis of the line emission
will reveal the physical conditions within the plasma and allow examination of
alternative models.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
00:08:17.00 +51:22:54.00 KPD0005+5106 HRC-S LETG 20.00
===================================================================================
Proposal Number: 02200081
Proposal Title: STAR FORMING REGION NGC 6530
PI: STEPHEN MURRAY
Subject Category: NORMAL STARS AND WD
Abstract: Our observations of star formation regions and young compact clusters
will address: i) stellar collapse and commencement of nuclear burning -
associated high X-ray activity makes such observations one of the best techniques
for selecting young stars in molecular clouds for detailed study; and ii) the
question of the existence of the X-ray activity in low mass stars at the onset of
full convection - the problem of conflicting evidence arising from studies of
field M dwarfs can be addressed by observing young open clusters cores over a
range of ages and by examining the behavior of Lx and Lx/L_bol with spectral type
and/or rotation.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
18:04:24.00 -24:21:20.00 NGC 6530 ACIS-I NONE 61.00
===================================================================================
Proposal Number: 02200137
Proposal Title: THE M 16 STAR-FORMING REGION
PI: JEFFREY LINSKY
Subject Category: NORMAL STARS AND WD
Abstract: The Eagle Nebula (M 16, NGC 6611) is a giant H II region with an
optically visible cluster of very young MS OB stars and low-mass pre-main
sequence stars. The fingers of the Eagle Nebula also contain some of the youngest
known embedded mm and infrared protostars. We will obtain an 80-ks ACIS-I image
of the core of the Eagle Nebula to look for X-ray emission and flares from the
stars and protostars of M 16. To our knowledge, this is the first pointed X-ray
observation of M 16. Given the distance to M 16 (2.1 kpc) and the high density of
stars (2200 catalogued stars within 20 arcmin of the cluster center), a
long-exposure Chandra image is needed to reliably detect and identify the X-ray
sources.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
18:18:44.72 -13:47:56.50 M 16 ACIS-I NONE 80.00
===================================================================================
Proposal Number: 02200059
Proposal Title: OBSERVATION OF SCO-CEN OUTLYERS
PI: GORDON GARMIRE
Subject Category: NORMAL STARS AND WD
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
11:33:25.40 -70:11:41.00 HD100546 ACIS-I NONE 3.00
11:33:25.40 -70:11:41.00 HD100546 ACIS-I NONE 3.00
11:33:25.40 -70:11:41.00 HD100546 ACIS-I NONE 3.00
12:00:05.10 -78:11:35.00 HD104237 ACIS-I NONE 3.00
12:00:05.10 -78:11:35.00 HD104237 ACIS-I NONE 3.00
12:00:05.10 -78:11:35.00 HD104237 ACIS-I NONE 3.00
15:49:57.80 -03:55:16.00 HD141569 ACIS-I NONE 3.00
16:40:17.90 -23:53:45.00 HD150193 ACIS-I NONE 3.00
16:54:44.90 -36:53:19.00 HD 152404 ACIS-I NONE 3.00
===================================================================================
Proposal Number: 02200175
Proposal Title: A SEARCH FOR CORONAL X-RAYS FROM WHITE DWARFS BY CHANDRA
PI: Zdzislaw Musielak
Subject Category: NORMAL STARS AND WD
Abstract: Observations of DA and DB white dwarfs have not been successful in
detecting coronal X-ray emission, but observations of late-type dwarfs and giants
show that coronae are common for these stars. To produce coronal X-rays, a star
has to have a well-developed convection zone and a dynamo-generated magnetic
field. There is strong evidence that the DB star GD 358 and the DA star LHS 1038
have weak and variable surface magnetic fields. Theory suggests that these fields
are generated by dynamo action, and that both stars have well-developed
convection zones. These stars are among the most promising white dwarf candidates
for having coronal X-ray emission at level detectable by CHANDRA. Its discovery
would confirm the existence of a new class of objects with convection-dynamo
driven X-rays.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
00:12:17.50 +50:25:52.90 LHS 1038 ACIS-S NONE 5.00
16:47:18.30 +32:28:25.50 GD 358 ACIS-S NONE 5.00
===================================================================================
Proposal Number: 02200178
Proposal Title: X-RAYS FROM THE NEAREST PROTOSTARS: L1551
PI: JOHN BALLY
Subject Category: NORMAL STARS AND WD
Abstract: The discovery of hard X-ray emission from protostars may have profound
implications for the astrophysics of star formation the earliest phases of
stellar evolution. The Lynds 1551 cloud in the Taurus-Auriga complex is the
closest group of actively forming stars with several Class 0/I protostars and
outflows lying in a single ACIS-I field. The proposed observation will give an
extremely sensitive measurements of these protostars and other young stars, and
will search for X-rays emission from Herbig-Haro shocks.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
04:31:32.50 +18:07:49.00 LYNDS 1551 ACIS-I NONE 80.00
===================================================================================
Proposal Number: 02200185
Proposal Title: STELLAR CENSUS OF THE CHAMAELEON I NORTH CLOUD
PI: ERIC FEIGELSON
Subject Category: NORMAL STARS AND WD
Abstract: Unbiased and complete samples of pre-main sequence stars in star
forming regions are essential for determining the initial mass function, star
formation history and efficiency of clouds, magnetic activity evolution, and the
longevities of circumstellar disks (and thereby timescales for planet formation).
Infrared samples select preferentially stars with hot disks while X-ray surveys
are unbiased in this respect. The nearby, rich Chamaeleon I-North star forming
region offers a superb opportunity to detect several dozen pre-main sequence
stars and brown dwarfs down to extremely low masses in a single Chandra field to
address these issues.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
11:10:12.00 -76:34:30.00 CHA I NORTH CLOUD ACIS-I NONE 70.00
===================================================================================
Proposal Number: 02200208
Proposal Title: HIGH ENERGY PROCESSES AT THE EARLIEST STAGES OF MASSIVE STAR
FORMATION
PI: HENRIK BEUTHER
Subject Category: NORMAL STARS AND WD
Abstract: We propose to observe with CHANDRA ACIS-S the youngest sites of high
mass star formation. Recent ASCA observations suggest, that the earliest
evolutionary states of massive star formation are associated with hard X-ray
emission. A systematic proof of this finding can only come from the superior
resolution achievable with CHANDRA. The observations will allow us to resolve the
protostellar cluster and, supplemented with high resolution IR and radio data, to
identify the nature of the detected objects. The X-ray spectral information will
give us important clues on the X-ray production mechanism in high mass
protostars, which is up to now unexplored. The observations will also permit to
evaluate the impact of X-rays on star formation and chemistry within dense
molecular cores.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
19:43:11.40 +23:44:06.00 19410+2336 ACIS-S NONE 20.00
===================================================================================
Proposal Number: 02200221
Proposal Title: A HIGH RESOLUTION X-RAY SPECTRUM OF THE INTERMEDIATE ACTIVITY
STAR $\EPSILON$ ERI
PI: JURGEN SCHMITT
Subject Category: NORMAL STARS AND WD
Abstract: We propose to obtain a high-spectral resolution and a high
signal-to-noise X-ray spectrum of the intermediate activity star $\epsilon$ Eri
with the Chandra LETG. $\epsilon$ Eri is nearby (d = 3.29 pc), hence the full
spectral range of the Chandra LETG can be utilised. Further, the star is unusual
in the sense that it has both low temperature (Fe IX) and high temperature (Fe
XXI) lines in its soft X-ray spectrum, all of which can be simultaneously
studied. The LETG spectrum of $\epsilon$ Eri will be of unprecedented quality and
allow us to study the detailed coronal temperature distribution, densities and
possible abundance anomalies in $\epsilon$ Eri. $\epsilon$ Eri is a {\bf key
target}, since it is the by far nearest and X-ray brightest star of {\bf
intermediate activity}.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
03:32:55.80 -09:27:30.00 EPSILON ERI HRC-S LETG 100.00
===================================================================================
Proposal Number: 02200227
Proposal Title: INTRINSIC X-RAY EMISSION FROM M-TYPE GIANTS
PI: MATTHIAS HUENSCH
Subject Category: NORMAL STARS AND WD
Abstract: We propose to observe five M-type giants detected in the course of the
ROSAT all-sky survey in order to confirm the detections and to obtain accurate
positions and count rates with the HRC-I. M-type giants are old, low-mass stars
to the right of the canonical X-ray dividing line and they are not expected to
show magnetic activity and hence X-ray emission at all. Thus, any X-ray
detections among such stars would challenge our ideas of coronal structures and
late stellar activity in giants, especially as possible companions are not a
reasonable explanation. Therefore, it is important to comfirm or reject the
preliminary detections and to find out whether they are intrinsic or
misidentified with background sources.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
02:35:47.00 +34:41:16.00 HR 750 HRC-I NONE 3.00
14:46:06.00 +15:07:54.00 HR 5512 HRC-I NONE 3.00
===================================================================================
Proposal Number: 02200277
Proposal Title: SEARCH FOR X-RAYS FROM COLLAPSING MAGNETIZED PRE-STELLAR
CONDENSATIONS
PI: NICOLAS GROSSO
Subject Category: NORMAL STARS AND WD
Abstract: X-rays from young protostars are likely, as is the VLA emission, a
reliable tracer of the start of an accretion process onto a central object. We
seek to assess whether or not X-ray emission is simultaneous with the very first
steps of star formation, or even precedes them. The main goal of this proposal is
to search for X-ray emission from collapsing pre-stellar condensations, and to
investigate the chronology between X-ray, VLA emission, and outflow phenomena
during protostar formation. We request 2 x 100 ksec to study the double NGC
2068/2071 complex in the Orion B giant molecular cloud at d~400 pc, containing
several young protostars, and many newly discovered pre-stellar condensations.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
05:46:43.50 +00:03:30.00 NGC 2068 ACIS-I NONE 100.00
===================================================================================
Proposal Number: 02200280
Proposal Title: BINARIES IN OLD OPEN CLUSTERS: M67
PI: TOMASO BELLONI
Subject Category: NORMAL STARS AND WD
Abstract: We propose to observe the old open cluster M 67 to study its population
of X-ray emitting objects. On the basis of our ROSAT campaigns we expect to see a
variety of objects. Many of these are stars currently undergoing tidal
interaction, or that have interacted tidally in the past. Some may be rapidly
rotating stars that are the product of a merger. These objects are X-ray sources
because of a very specific type of binary evolution, and by studying these
special systems in optical follow-up we can study little-understood details of
stellar evolution and of binary evolution. This provides new information on
initial parameter distributions of binaries in a well defined population.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
08:51:24.00 +11:49:48.00 M 67 ACIS-I NONE 50.00
===================================================================================
Proposal Number: 02200327
Proposal Title: STAR FORMATION IN THE ROSETTE MOLECULAR CLOUD
PI: LEISA TOWNSLEY
Subject Category: NORMAL STARS AND WD
Abstract: We propose to use an ACIS mosaic of the Rosette Molecular Cloud (RMC)
and its associated HII region as a testbed for understanding both high- and
low-mass star formation. Our goals are: to use X-ray-selected sources to decide
which infrared (IR) sources are actually RMC members; to determine if there is an
X-ray population distinct from the IR population; to study X-rays from
low/intermediate mass stars associated with CO clumps and embedded stellar
clusters; to examine the relationships between the X-ray luminosity function
(XLF), K-band luminosity function, and theoretical initial mass function (IMF)
over a wide range (tenths to tens of solar masses); and to search for extended
emission at the ionization front between the RMC and the Rosette Nebula.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
06:31:52.00 +04:55:57.00 ROSETTE FIELD 1 ACIS-I NONE 20.00
06:32:40.00 +04:43:00.00 ROSETTE FIELD 2 ACIS-I NONE 20.00
06:33:16.30 +04:34:57.00 ROSETTE FIELD 3 ACIS-I NONE 20.00
06:34:16.50 +04:28:01.00 ROSETTE FIELD 4 ACIS-I NONE 20.00
===================================================================================
Proposal Number: 02200366
Proposal Title: THE X-RAY VIEW OF ACTIVE STAR-FORMATION IN THE DENSE STELLAR
CLUSTER NGC 2024
PI: STEPHEN SKINNER
Subject Category: NORMAL STARS AND WD
Abstract: The molecular cloud associated with the HII region NGC 2024 contains
one of the richest young stellar clusters in the Orion region. More than 300 IR
sources have been detected within the cluster, and millimeter observations have
revealed a group of six protostellar condensations near the cluster center which
are thought to represent the earliest stages of star formation. We propose to
obtain a sensitive ACIS-I image of NGC 2024 centered on this protostellar
cluster. This observation will permit an accurate determination of the X-ray
luminosity function of NGC 2024, and will also serve as a sensitive search for
X-ray emission from protostars and from low-mass cluster members which have so
far escaped detection in infrared surveys.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
05:41:46.30 -01:55:28.70 NGC_2024 ACIS-I NONE 80.00
===================================================================================
Proposal Number: 02200371
Proposal Title: THE COOL AND HOT CORONAE OF HR 1099
PI: MANUEL GUEDEL
Subject Category: NORMAL STARS AND WD
Abstract: Chandra offers unique possibilities for the study of emission measure
distributions of stellar coronae over a wide range of temperatures. At the same
time, high-resolution spectroscopy determines unambiguously the abundances of
chemical elements. Previous solar/stellar observations have indicated `anomalies'
in the coronal elemental composition. The present investigation addresses the
question of whether abundance anomalies are dependent on the temperature of
coronal plasma in one and the same star. In particular, the observation
concentrates on the cooler part of the emission measure distribution of a very
active binary system (HR1099). The LETGS offers unique access to different
ionization stages of various elements not accessible by previous observations.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
03:36:47.30 +00:35:15.90 HR 1099, V711 TAU HRC-S LETG 100.00
===================================================================================
Proposal Number: 02200375
Proposal Title: FLARE ACTIVITY AND CORONAL HEATING ON THE ACTIVE FLARE STAR
BINARY UV CETI
PI: MARC AUDARD
Subject Category: NORMAL STARS AND WD
Abstract: Coronal heating on active stars has been related to magnetic flare
activity explicitly seen in these stars, or to microflaring concepts accessible
through flare energy distribution statistics and coronal parameters
(temperatures, emission measure distributions, densities, mass flows). We propose
to test these concepts in the extremely variable flare star binary UV Cet,
requesting an 80 ks exposure that will provide information on overall coronal
parameters, flare statistics, and flare heating mechanisms. A coordinated VLA
observation is planned. This exposure will probe two apparently identical stars
at the same time. Their separation of 1" does not split the spectral lines, while
the 0th order image in the proposed LETGS/HRC-S will clearly resolve the binary.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
01:39:01.88 -17:57:00.84 UV CETI,GLIESE 65 HRC-S LETG 80.00
===================================================================================
Proposal Number: 02200383
Proposal Title: THE NEARBY LOW METALLICITY STARBURST NGC~346: A HIGH REDSHIFT
STARBURST ANALOGUE
PI: MICHAEL CORCORAN
Subject Category: NORMAL STARS AND WD
Abstract: Hot stars form in groups in spiral and irregular galaxies.
Understanding the X-ray emission from starburst regions depends on disentangling
point source from diffuse emission. We request a 100 ksec ACIS-I observation of
an important nearby "starburst analogue", NGC 346 in the LMC. This observation
will allow us to study the extended emission, the emission from evolved O stars,
and to look for candidate collapsed objects and proto-stars in this
low-metallicity stellar group.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
00:59:05.00 -72:10:42.10 NGC 346 ACIS-I NONE 100.00
===================================================================================
Proposal Number: 02200420
Proposal Title: X-RAY EMISSION FROM HIGH MASS PRE-MAIN-SEQUENCE STARS
PI: KATSUJI KOYAMA
Subject Category: NORMAL STARS AND WD
Abstract: X-rays from high mass remain sequence stars have not been well studied
both in observation and theory. We propose an ASIC-I observation on a high mass
star forming region, the Monoceros R2 cloud, since ASCA has already found
variable hard X-ray sources embedded in the cloud. Our objectives are to resolve
the hard X-rays spatially and investigate which massive stars are responsible for
the hard X-rays. We then observe the plasma temperature, absorption column, time
variability including flare activity and chemical composition of the resolved
sources. These are key information for the X-ray emission mechanisms, hence the
evolution of the massive young stars.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
06:07:49.50 -06:22:54.70 MONOCEROS R2 ACIS-I NONE 100.00
===================================================================================
Proposal Number: 02200424
Proposal Title: REVEALING THE MAGNETIC ACTIVITIES ON HERBIG AE/BE STARS
PI: SHIGEO YAMAUCHI
Subject Category: NORMAL STARS AND WD
Abstract: We propose ACIS-I observations on two intermediate-mass
pre-main-sequence stars (Herbig Ae/Be stars; HAEBE), MWC297 and EC95, because
ASCA found variable hard X-rays from these HAEBEs, but its limited spatial
resolution did not allow us to exclude possibility that the X-rays are due to
nearby low-mass young stars. With Chandra, we intend to (1) uniquely identify the
X-ray sources to the HAEBEs, (2) investigate the origin of the X-rays, (3) study
the dust-gas composition of the circumstellar medium, (4) search for a close
companion low-mass star and (5) discover X-rays from Class 0 protostars in a
small molecular cloud, the Serpence cloud.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
18:27:39.60 -03:49:52.00 MWC297 ACIS-I NONE 40.00
===================================================================================
Proposal Number: 02200379
Proposal Title: X-RAY SPECTROSCOPY OF THE SUN IN TIME: A STUDY OF CORONAL
PHYSICS OF SOLAR-TYPE STARS AT DIFFERENT AGES
PI: MANUEL GUEDEL
Subject Category: NORMAL STARS AND WD
Abstract: A comprehensive project on the ``Sun in Time'' has been set up over the
last few years, aiming at studying the physical properties, phenomenology, and
fundamental parameters of a solar-type star (G0-5 V) throughout its main-sequence
life. We propose a spectroscopic study with the LETGS/HRC-S to investigate in
detail coronal temperature and emission measure structuring, coronal densities,
elemental abundances, possible mass flows, and variability in selected targets.
We propose three stars regularly distributed in log(rotation period) over the
possible range, to be complemented by one GTO target that we will have access to.
This will provide a gross overview over the range of solar-type coronae. It is
anticipated that additional targets will be requested in later AOs.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
14:39:00.20 +64:17:30.00 EK DRA HRC-S LETG 70.00
===================================================================================
Proposal Number: 02200535
Proposal Title: CORONAL DYNAMICS OF THE FLARE STAR EV LAC
PI: RACHEL OSTEN
Subject Category: NORMAL STARS AND WD
Abstract: We request a 100 ks ACIS-S+HETG observation of the dMe flare star EV
Lac. EV Lac is an excellent candidate for dispersed spectroscopic studies with
Chandra due to its brightness and propensity for frequent and extreme
variability. EV Lac is the second brightest M dwarf X-ray source (the other, AU
Mic, has already been observed). HETG observations allow study of coronal
dynamics for the first time. The key physical parameters: abundances,
temperatures, and densities, which have been constrained poorly up until now, can
be determined accurately, leading to improved models and understanding of coronal
structure and variability. Coordinated observations with HST and radio and
optical observatories would extend our investigation into the dynamics of the
entire atmosphere of EV Lac.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
22:46:49.70 +44:20:02.40 EV LAC ACIS-S HETG 100.00
===================================================================================
Proposal Number: 02200558
Proposal Title: WHEN THE DYNAMO SPUTTERS:THE CORONA OF A AN EXTREMELY INACTIVE
(MAUNDER MINIMUM?) STAR
PI: STEVEN SAAR
Subject Category: NORMAL STARS AND WD
Abstract: The Wilson survey identified a group of stars with very low level,
near-constant Ca II emission. Weak UV and Xray emission in a few of these stars
implies that magnetic heating from a residual (probably turbulent) dynamo still
operates. Many of these stars are likely in the stellar analog of the Maunder
minimum - a period when the normal cyclic dynamo of the sun was in quiescence. We
propose to study the brightest of these stars with Chandra. The stars present a
unique opportunity to 1) study the properties of the weakest dwarf star coronae,
2) to investigate the coronal product of a predominantly turbulent dynamo in a
high mass star, exploring its dependence on rotation and mass, and 3) to
potentially study (indirectly) the properties of the solar corona during magnetic
minima.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
01:44:03.88 -15:56:13.45 TAU CETI ACIS-S NONE 50.00
===================================================================================
Proposal Number: 02200607
Proposal Title: TIME-RESOLVED CORONAL SPECTROSCOPY OF THE SHORT-PERIOD ACTIVE
BINARY ER VUL (G0 V + G5 V)
PI: ALEXANDER BROWN
Subject Category: NORMAL STARS AND WD
Abstract: We propose HETGS observations of ER Vul lasting two orbital periods (P
= 60 ksec) to obtain time-resolved coronal emission line spectra. ER Vul is the
brightest short-period RS CVn binary in X-rays. Despite showing a partial optical
eclipse, no X-ray eclipses are evident. Instead continuous small-scale flaring is
seen. We shall investigate the temporal variability of the coronal temperature
and EM distributions, estimate density and abundance variations, and model the
changing coronal plasma conditions. Contemporaneous radio and optical monitoring
will be used to study the nonthermal electron population and starspot
distribution. Study of extreme activity on Sun-like stars extends our ability to
understand the causes of solar activity with its direct effects on the Earth.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
21:02:25.90 +27:48:26.40 ER_VUL ACIS-S HETG 120.00
===================================================================================
Proposal Number: 02200620
Proposal Title: HIGH RESOLUTION SPECTROSCOPY AND VARIABILITY OF THE
TRAPEZIUM-LIKE SYSTEM HD 206267 IN IC 1396
PI: NORBERT SCHULZ
Subject Category: NORMAL STARS AND WD
Abstract: Trumpler 37 is with 3 Myr one of the youngest open clusters in our
galaxy. The core of the cluster hosts the Trapezium-like complex HD 206267. Its
main component is a young and hot O-star triplet. Twice as distant, this system
strongly resembles the Orion Trapezium Cluster. In AO1 we observed Orion twice
with the HETGS and found that the high resolution spectrum of the central O-star
showed a large number of emission lines which indicated a wide range of
temperatures in the wind of up to 11 keV. Furthermore we found a large number of
transient X-ray sources in the vicinity, which resemble deeply embedded
protostars. In Trumpler 37 we face a similar situation. Two 40 ks exposure with
the HETGS allows us to study a similar star formation scenario in IC 1396.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
21:38:57.50 +57:29:11.00 HD 206267 ACIS-S HETG 40.00
21:38:57.50 +57:29:11.00 HD 206267 ACIS-S HETG 40.00
===================================================================================
Proposal Number: 02200644
Proposal Title: TORTURED CORONAE IN THE RAPID BRAKING ZONE
PI: THOMAS AYRES
Subject Category: NORMAL STARS AND WD
Abstract: Deep HETGS exposures of four key G0-G5 giants will address fundamental
questions concerning their hot magnetized coronae by determining temperatures and
densities, probing chemical fractionation processes, and exploring plasma
dynamics. The giants lie in or near the "Rapid Braking Zone" where moderate mass
stars undergo a radical transformation of their outer atmospheres, perhaps as a
relic magnetosphere is disrupted by the onset of a solar-like dynamo. ACIS-I CCD
spectra of five G/K supergiants will explore the even more extreme extension of
the RBZ to higher masses: where hot coronae mix freely with cool stellar winds.
These are ideal targets to exploit the experience gained in the Emission Line
Project studies of the active binaries Capella and HR 1099.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
10:46:46.10 -49:25:12.00 HD 93497 ACIS-S HETG 20.00
10:46:46.10 -49:25:12.00 HD 93497 ACIS-S HETG 60.00
10:46:46.10 -49:25:12.00 HD 93497 ACIS-S HETG 60.00
12:51:41.80 +27:32:26.00 HD 111812 ACIS-S HETG 140.00
23:49:40.80 +36:25:31.00 HD 223460 ACIS-S HETG 100.00
===================================================================================
Proposal Number: 02200908
Proposal Title: X-RAY PROBING OF THE BIRTH OF THE STAR
PI: YOSHITOMO MAEDA
Subject Category: NORMAL STARS AND WD
Abstract: We propose a challenging 50~ksec observation of the youngest protostar
S106 FIR. The scientific goal is to know if a protostar at $1\times10^{2}$ yrs
old emits X-rays or not. The results are crucial to test if X-rays probe the
birth of star or not. The only probe of the young protostars is currently radio
observation of jets. However, jets are indirect probes of the central core
object, i.e., protostar. Hence, our observations may give a new and unique way to
directly test existence of protostars at the beginning of birth.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
20:27:25.50 +37:22:48.70 S106 FIR ACIS-I NONE 50.00
===================================================================================
Proposal Number: 02200912
Proposal Title: HIGH RESOLUTION SPATIALLY RESOLVED SPECTRA OF THE X-RAY
BRIGHTEST INTERMEDIATE ACTIVITY SYSTEM XI UMA AB
PI: JEREMY DRAKE
Subject Category: NORMAL STARS AND WD
Abstract: The aim of this proposal is to find the missing link between solar-like
coronal activity and the coronal activity of ``active'' stars---stars that can
have X-ray luminosities 10,000 times that of the active Sun. The xi UMa AB system
is the brightest intermediate activity object in X-rays and the optically
identical AB components---one a rapid rotator the other not--are separated by 2
arcsec and can be spatially resolved in Chandra HETG spectra. An 80ks HETG
observation will provide the first and only opportunity to spatially and
spectrally resolve the system and will allow us to perform a comparitive study of
identical stars at different activity levels.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
11:18:10.90 +31:31:44.00 XI UMA ACIS-S HETG 80.00
===================================================================================
Proposal Number: 02200688
Proposal Title: HIGH RESOLUTION X-RAY SPECTROSCOPY OF GAMMA CASSIOPEIA
PI: MYRON SMITH
Subject Category: NORMAL STARS AND WD
Abstract: Gamma Cas is a unique Be X-ray source with erratic "shots," a hard
spectrum, and a high flux level between that of single Be stars and the Be/X-ray
binaries. Previous low resoluution data have shown both slow, correlated X-ray
and UV variability and fast variability reminiscent to that attributed to
magnetic flaring activity in cool stars. We propose to use the HETG to study the
properties of the temperature, density, composition, bulk motions and ionization
processes in the circumstellar environment of this unusual hot star. This will
serve to shed light on the nature of the energetic processes occuring on this
star.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
00:56:42.50 +60:43:00.30 GAMMA CAS ACIS-S HETG 54.00
===================================================================================
Proposal Number: 01208024
Proposal Title: CAPTURING WR140 AT PERIASTRON WITH THE CHANDRA HETG
PI: ANDREW POLLOCK
Subject Category: NORMAL STARS AND WD
Abstract: This is a resubmission of our AO2 proposal number 02200508 which was
rejected, despite high scores, because it was mistakenly thought that XMM would
be making similar observations near periastron. In fact, according to its
official WWW visibility tool, XMM is not able to observe any nearer than two
months either side of periastron passage and possibly not at all. The compelling
scientific justification was given in our original proposal and endorsed by the
Peer Review. We are responding to the Review Panel's recommendation to apply for
Director's Discretionary Time.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
20:20:28.00 +43:51:16.30 WR140 ACIS-S HETG 25.00
20:20:28.00 +43:51:16.30 WR140 ACIS-S HETG 50.00
***********************************************************************************
WD BINARIES AND CV
--------------------------------------------------
===================================================================================
Proposal Number: 02300040
Proposal Title: NEAR-EDDINGTON ACCRETION IN THE BINARY SUPERSOFT X-RAY SOURCE RX
J0513.3-6951
PI: PETER PREDEHL
Subject Category: WD BINARIES AND CV
Abstract: Study of the X-ray properties of the binary supersoft X-ray source RX
J0513.3-6951
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
05:13:50.80 -69:51:47.00 RX J0513.9-6951 HRC-S LETG 50.00
===================================================================================
Proposal Number: 02300096
Proposal Title: CV AND QLMXB LUMINOSITY FUNCTION IN THE EXTREME GLOBULAR M80
PI: STEPHEN MURRAY
Subject Category: WD BINARIES AND CV
Abstract: We propose to carry out a deep search for cataclysmic variables (CVs)
and quiescent low mass X-ray binaries (qLMXBs) in the galactic globular cluster
M80. Ferraro et al. (1999) have recently used HST-WFPC2 imaging to detect a
remarkably dense population of blue stragglers there. This suggests that the core
of this cluster is the site of vigorous single and binary star interactions,
since the blue stragglers are expected to be collisionally formed. A cluster core
in such a dynamical state is also likely to produce significant numbers of CVs
through similar collisional channels. Thus a deep observation of this cluster is
an ideal extension of our (impending) GTO1 studies of two differing but
contrasting globulars for their CV content: NGC 6397 and 47 Tuc.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
16:17:02.30 -22:58:32.60 NGC6093 ACIS-S NONE 50.00
===================================================================================
Proposal Number: 02300183
Proposal Title: X-RAY SPECTROSCOPY OF THE BRIGHT SUPERSOFT SOURCES CAL 83 AND
CAL 87
PI: JOCHEN GREINER
Subject Category: WD BINARIES AND CV
Abstract: The AXAF LETG is sensitive to the range of energy of supersoft X-ray
sources (SSS), some of the most puzzling low-mass X-ray binaries ever discovered.
We propose to exploit the unique spectral capabilities of the LETG to study in
detail two of the most intriguing SSS, Cal 83 (50 ksec) and Cal 87 (100 ksec).
SSSs probably involve very hot white dwarfs within a binary system, burning
accreted hydrogen in a shell on their surface. We propose to get detailed high
spectral-resolution, high signal-to-noise spectra which will allow to distinguish
between white dwarf (due to characteristic absorption edges) and neutron star
models (smooth black body spectrum), and to search for clues for the differences
between these two objects.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
05:46:46.52 -71:08:54.00 CAL 87 ACIS-S LETG 100.00
===================================================================================
Proposal Number: 02300236
Proposal Title: CHANDRA SOFT X-RAY SPECTROSCOPY AND TIMING OF THE DWARF NOVA SS
CYGNI IN OUTBURST
PI: CHRISTOPHER MAUCHE
Subject Category: WD BINARIES AND CV
Abstract: We propose to perform Chandra LETGS observations of SS Cygni in
outburst to measure the spectrum of the EUV/soft X-ray component---the ``big blue
bump''--of its boundary layer radiation. These data will be used to determine or
constrain the physical conditions (temperature, density, velocity field) of the
boundary layer plasma; the role, if any, of radiation transport (e.g., scattering
in the system's accretion disk wind) in determining the observed spectrum; and
the characteristics (period, coherence, harmonic content, spectrum) of the
quasi-coherent EUV oscillations, thereby constraining their cause.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
21:42:42.70 +43:35:09.50 SS CYG HRC-S LETG 50.00
===================================================================================
Proposal Number: 02300245
Proposal Title: IRON LINE BROADENING IN THE INTERMEDIATE POLAR AO PSC
PI: COEL HELLIER
Subject Category: WD BINARIES AND CV
Abstract: ASCA observations of the Fe Kalpha line complex of magnetic cataclysmic
variables revealed a puzzle -- half have narrow lines and half have broad lines.
Further, the broadening is too large to be explained by Doppler shifts and,
simulations show, is too small to be explained by Compton scattering in the
accretion columns. To obtain data better by a factor ~3, and so resolve the
puzzle, we request a HETG observation of AO Psc, the system showing broadening
most securely. We will compare this to our AO-1 observation of V1223 Sgr, which
has narrow lines, to enable us to investigate broadening mechanisms in accretion
columns and use them as a probe of accretion-column physics.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
22:55:18.00 -03:10:40.40 AO PSC ACIS-S HETG 100.00
===================================================================================
Proposal Number: 02300482
Proposal Title: THE ORIGIN OF SOFT X-RAYS IN DQ HERCULIS
PI: KOJI MUKAI
Subject Category: WD BINARIES AND CV
Abstract: DQ Herculis (Nova Her 1934) has been found to be a weak soft X-ray
source, even though the accretion disk is thought to block our line of sight to
the white dwarf primary at all orbital phases. The observed luminosity is an
order of magnitude higher than that expected of the secondary. What, then, is the
origin of these X-rays? One possibility is resonant scattering of a hidden X-ray
source by the accretion disk wind. Another is that the nova shell around DQ Her
has now become an X-ray source, as the ejecta plough into the surrouding
interstellar medium. We propose Chandra imaging to distinguish between these
possibilities, and use timing and spectral information to constrain the model
further.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
18:07:30.20 +45:51:32.00 DQ HERCULIS ACIS-S NONE 22.00
18:07:30.20 +45:51:32.00 DQ HERCULIS ACIS-S NONE 48.00
===================================================================================
Proposal Number: 02300495
Proposal Title: A HIGH RESOLUTION SPECTROSCOPIC OBSERVATION OF CAL 83
PI: FREDERIK PAERELS
Subject Category: WD BINARIES AND CV
Abstract: We propose a deep observation of the bright supersoft X-ray source
CAL83 with the LETGS. Combined with the high-sensitivity XMM-Newton/RGS spectrum
of this source, the observation will yield a superbly detailed photospheric
spectrum, covering the full range between the Wien cutoff and the cutoff imposed
by interstellar absorption. We will determine the fundamental stellar parameters
and search the spectrum for signatures of exotic effects in the atmosphere of the
object.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
05:43:34.10 -68:22:22.60 CAL 83 HRC-S LETG 35.00
05:43:34.10 -68:22:22.60 CAL 83 HRC-S LETG 65.00
===================================================================================
Proposal Number: 02300532
Proposal Title: CHANDRA HETG OBSERVATION OF V603 AQUILAE, A HIGH ACCRETION RATE,
NON-MAGNETIC CATACLYSMIC VARIABLE
PI: KOJI MUKAI
Subject Category: WD BINARIES AND CV
Abstract: We propose a 70 ksec HETG observation of V603 Aql, which is the hard
X-ray brightest example of the high accretion rate, non-magnetic cataclysmic
variables. Its ASCA spectrum is dominated by Fe K and L features. We will resolve
the Fe K region into three separate components, enabling us to estimate the shock
temperature and the nature and the covering factor of the reflector. The data
will also allow a simultaneous analysis of Fe K and L features in unprecedented
details. We will also search for K lines of abundant elements from O to Ar, and
constrain the emission measure distribution in the 0.5 to 10 keV range. Finally,
we will search for absorption signatures of the accretion disk wind.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
18:48:54.50 +00:35:03.00 V603 AQUILAE ACIS-S HETG 70.00
===================================================================================
Proposal Number: 02300588
Proposal Title: STUDYING THE OLD CLASSICAL NOVA SHELLS IN X-RAYS II : THE SHELL
OF CLASSICAL NOVA PICTORIS 1925 (RR PIC)
PI: SOLEN BALMAN
Subject Category: WD BINARIES AND CV
Abstract: We propose a 100 ksec CHANDRA ACIS-S observation to resolve and detect
the shell of old classical nova Pictoris 1925 thereby establishing a second
member, after GK Per, of a possible new class of X-ray emitters, Clasical Nova
Remnants. An archieval ROSAT PSPC data show extended emission from the source. We
plan to exploit the unique spatial and spectral capabilities of the ACIS-S
detector in order to study the morphology and spectrum of the nova shell
simultaneously. We expect that this observation will have great implications on
our understanding of the classical nova evolution, nature of TNRs, outburst
mechanisms together with the interaction of the nova shells with their
environments of interstellar or circumstellar origin and physics of shocks.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
06:35:36.10 -62:38:24.30 RR PIC ACIS-S NONE 25.00
===================================================================================
Proposal Number: 02300626
Proposal Title: THE X-RAY SOURCE POPULATION IN THE CORE OF M15
PI: PHIL CHARLES
Subject Category: WD BINARIES AND CV
Abstract: We are proposing a definitive search for cataclysmic variables and low
luminosity LMXBs in the prototypical post-core collapse cluster M15. This will
provide detailed constraints on the X-ray source population, which could even
contain a second LMXB within the central cusp. Previous searches have been
restricted to nearby clusters, but those which contain the most favorable
environments (mass and compactness) for forming compact binaries are more
distant, and these are now within the reach of Chandra. Furthermore, only the
high spatial resolution of Chandra allows such a search in the ideal cluster
(M15) because of the presence of a bright LMXB in the core.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
21:29:58.30 +12:10:00.50 M15 HRC-I NONE 10.00
21:29:58.30 +12:10:00.50 M15 HRC-I NONE 10.00
21:29:58.30 +12:10:00.50 M15 HRC-I NONE 10.00
===================================================================================
Proposal Number: 02300734
Proposal Title: HIGH-RESOLUTION X-RAY SPECTROSCOPY OF THE SYMBIOTIC STAR CH CYG:
\ ANY NEED FOR COLLIDING WINDS IN SYMBIOTICS?
PI: PETER WHEATLEY
Subject Category: WD BINARIES AND CV
Abstract: I have suggested a new interpretation of the X-ray spectra of symbiotic
stars: that they are dominated by absorption by the partially-ionised wind of the
red giant, and that there is no need for emission from colliding winds. \\ I
propose to observe the bright symbiotic star CH Cyg with the Chandra
HETGS/ACIS-S. The high-resolution spectrum will immediately resolve the
emission/absorption ambiguity because individual absorption edges and emission
lines will be directly observable. The detailed analysis of these features will
provide a powerful probe of the wind of the red giant, and of wind accretion onto
a white dwarf.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
19:24:33.10 +50:14:29.00 CH CYG ACIS-S HETG 50.00
===================================================================================
Proposal Number: 02308048
Proposal Title: THE RECURRENT NOVA CI AQL
PI: JOCHEN GREINER
Subject Category: WD BINARIES AND CV
Abstract: Recurrent novae (RN) are expected to emit soft x-rays during a short
interval after the ejected shell has become optically thin and before the
hydrogen shell-burning ceases. Observations of the soft x-rays will test
theoretical models and will also test the conjecture that RN are SN Ia
progenitors. Unfortunatley, no RN occurred during the ROSAT years, and in fact
only one has been detected as a soft X-ray emitter (Kahabka etal 1999). CI Aql
went into outburst in Apr. 2000. Hachisu & Kato (2001; astro-ph/0104461) predict
that CI Aql should have recently become active at soft X-ray wavelengths and is
potentially detectable until Aug. 2001. We propose (1) a 2 ksec ACIS-S
observation to verify the existence of soft X-rays, and (2) if soft X-rays are
discovered, a 20 ksec LETG-HRC observation to determine crucial parameters (white
dwarf mass, effective temperature, composition, luminosity, wind properties).
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
18:52:03.60 -01:28:39.00 CI AQL ACIS-S NONE 0.00
18:52:03.60 -01:28:39.00 CI AQL ACIS-S NONE 2.00
===================================================================================
Proposal Number: 02308052
Proposal Title: THE RECURRENT NOVA CI AQL
PI: JOCHEN GREINER
Subject Category: WD BINARIES AND CV
Abstract: We propose a 20 ksec ACIS-S observation of the recurrent nova (RN) CI
Aql. RNe are expected to emit soft x-rays during an interval after the ejected
shell has become optically thin and before the hydrogen shell-burning ceases and
the white dwarf cools. A 2 ksec Chandra ACIS-S observation on June 1, 2001
discovered that CI Aql was a soft X-ray source 380 days after outburst. The flux
was much smaller than expected. It is possible that the shell is dense and/or
expanding slowly; i.e. we may still be near the beginning of the soft X-ray
phase. If obscuration is still important, the proposed observation will detect a
distinctive spectral signature and will measure the ejected mass, testing whether
CI Aql is a possible SNIa progenitor. If obscuration is not important, we will
determine the temperature and luminosity of the white dwarf. Making these
measurements and adding a second point to the X-ray light curve, will
significantly add to the evolving understanding of the properties of RNe.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
18:52:03.60 -01:28:39.00 CI AQL ACIS-S NONE 20.00
===================================================================================
Proposal Number: 02308054
Proposal Title: WZ SGE IN OUTBURST TEN YEARS EARLY: I THE EUV EMISSION
PI: PETER WHEATLEY
Subject Category: WD BINARIES AND CV
Abstract: WZ Sge is the most extreme dwarf nova. While most dwarf novae exhibit
outbursts every few weeks with optical amplitudes of 2-3 magnitudes, WZ Sge waits
thirty years between outbursts which then have amplitudes of 7 mag. These have
never been studied in X-rays. WZ Sge is in outburst right now (began around July
23.5 UT) presenting a unique opportunity to observe it in outburst with Chandra.
We are extremely lucky because the outburst was not expected for another ten
years, and may not repeat for another 30 years. In general dwarf novae are weak
hard X-ray sources in quiescence and strong EUV sources in outburst. We may
expect the same behaviour from WZ Sge though we must also be prepared for
unexpected behaviour from such an extreme system. Count rates are highly
uncertain, but we may expect WZ Sge to be the brightest EUV source in the sky. We
propose LETG spectroscopy to study the EUV component and ACIS-S spectrscopy of
the (probably weaker) hard emission.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
20:07:36.20 +17:42:15.00 WZ SGE HRC-S LETG 20.00
20:07:36.20 +17:42:15.00 WZ SGE HRC-S LETG 20.00
20:07:36.20 +17:42:15.00 WZ SGE HRC-S LETG 20.00
===================================================================================
Proposal Number: 02308055
Proposal Title: WZ SGE IN OUTBURST TEN YEARS EARLY: II THE X-RAY EMISSION
PI: PETER WHEATLEY
Subject Category: WD BINARIES AND CV
Abstract: This is the second half of the WZ Sge DDT proposal. In the first we
requested HRC-S/LETG spectrscopy of the EUV emission. Here we request ACIS-S
observations of the (probably weak) X-ray emission. The X-ray emission is likely
to be supressed below its usual quiescent level during the outburst, as the
emission is thought to switch to the EUV. However, WZ Sge has never been observed
in X-rays during outburst.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
20:07:36.20 +17:42:15.00 WZ SGE ACIS-S NONE 5.00
20:07:36.20 +17:42:15.00 WZ SGE ACIS-S NONE 10.00
20:07:36.20 +17:42:15.00 WZ SGE ACIS-S NONE 10.00
20:07:36.20 +17:42:15.00 WZ SGE ACIS-S NONE 10.00
===================================================================================
Proposal Number: 02308056
Proposal Title: FIRST X-RAY OBSERVATIONS DURING AN EXTREMELY RARE OUTBURST OF WZ
SGE
PI: ERIK KUULKERS
Subject Category: WD BINARIES AND CV
Abstract: The cataclysmic variable (CV) WZ Sge has unexpectedly gone into
outburst on 2001 Jul 23 (IAU Circ 7669). Outbursts were seen in 1913, 1946 and
1978 (e.g. ApJ 248, 1067), suggesting a recurrence time of ~33 years. These
extremely rare outbursts, and their decline to quiescence have NEVER been covered
in X-rays. With Chandra we have the unique opportunity to study WZ Sge for the
first time through these phases. In quiescence the accretion disk is truncated by
the white dwarf magnetic field and X-ray oscillations (PASP 110, 403) at 27.9s
were observed. In outburst the disk reaches the white dwarf surface (e.g. MNRAS
305, 473) and possibly the oscillations cease to exist. By taking 10 ksec
snapshots of WZ Sge 3 times in the next 2-3 months, we will catch WZ Sge in its
various states, and get information on accretion rate onto the white dwarf,
abundances, and temperatures, etc. (e.g. MNRAS 288, 649). We have requested a DDT
on HST as well (PI: E. Sion).
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
20:07:36.20 +17:42:15.00 WZ SGE ACIS-S NONE 5.00
20:07:36.20 +17:42:15.00 WZ SGE ACIS-S NONE 10.00
20:07:36.20 +17:42:15.00 WZ SGE ACIS-S NONE 10.00
***********************************************************************************
BH AND NS BINARIES
--------------------------------------------------
===================================================================================
Proposal Number: 02400041
Proposal Title: PHOTOIONIZED X-RAY EMISSION IN CYG X-2
PI: CLAUDE CANIZARES
Subject Category: BH AND NS BINARIES
Abstract: This highly luminous X-ray binary was observed with the Chandra HETGS
during the verification and checkout. The source showed an X-ray flux of nearly
0.5 Crab causing severe depletion of photons in the MEG and HEG 1st order spectra
due to pile up effects. Nevertheless the spectrum showed various remarkable
features at high energies and in the higher orders, which can be identified as
photoionized emission from Mg-, Si-, S-, Ca-, and Fe. However the detections
remained spurious and at higher wavelengths very much affected by pile up. We
want to re-observe Cyg X-2 for 15 ks, in order to obtain pile up free 1st order
spectra, enhance and confirm the findings in the higher order spectra as well as
study variability in the line emission.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
21:44:41.70 +38:19:10.60 CYG X-2 ACIS-S HETG 15.00
===================================================================================
Proposal Number: 02400042
Proposal Title: HIGH RESOLUTION X-RAY SPECTROSCOPY OF X-RAY SPECTRA FROM THE
TRANSIENT X-RAY BURST SOURCE EXO 0748-676
PI: CLAUDE CANIZARES
Subject Category: BH AND NS BINARIES
Abstract: EXO 0748-676 is a transient X-ray burst source that shows X-ray
eclipses as well as broad intensity dips that last for about 1/3 of the orbital
period (3.82 hrs). Recent analysis of the persistent emission revealed a
previously unseen soft X-ray excess. It was indicated that during the dips the
central X-ray source is obscured by dipping material in the accretion disk. We
want to use these event in order to investigate line emission from either an
accretion disk corona or photoionized layers on the disk, which is usually
overpowered by the intense continuum emission of the central source. The source
is also a quite frequent X-ray burster leaving the opportunity to search for
narrow absorption features in the spectra of burst tails.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
07:48:33.30 -67:45:00.00 EXO 0748-676 ACIS-S HETG 50.00
===================================================================================
Proposal Number: 02400051
Proposal Title: THE ANOMALOUS X-RAY PULSAR 4U 0142+61
PI: CLAUDE CANIZARES
Subject Category: BH AND NS BINARIES
Abstract: The properties of 4U 0142+61 are similar to those of a small group of
"anomalous" X-ray pulsars (AXPs) with spin periods in the range 6-12 sec.
BeppoSAX as well as ASCA observed a blackbody spectral component in the soft
X-ray spectrum. The X-ray flux is quite strong and amounts to about 1.1xE^-10
erg/cm2/sec. Although highly absorbed (1E^22 cm2) its high soft flux allows to
search for possible cyclotron line emission features. From RXTE observations as
well as optical photometric studies a white dwarf companion seems to be possible,
although a scenario of an isolated neutron star accreting from a residual disk is
proposed as well. Due to the possibility for quite similar evolutionary
scenarios, we also search for line emission as observed in 4U 1626-67.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
01:46:22.00 +61:45:12.00 4U 0142+61 ACIS-S HETG 25.00
===================================================================================
Proposal Number: 02400069
Proposal Title: HIGH RESOLUTION X-RAY SPECTROSCOPY OF THE PRECESSING JET IN SS
433 (PART III)
PI: CLAUDE CANIZARES
Subject Category: BH AND NS BINARIES
Abstract: SS 433 is quite a unique galactic X-ray binary. The X-ray emission from
emerging jets are of thermal origin. The cooling hydrodynamical outflow in form
of a jet has dimensions of the binary separation. SS 433 has been observed during
AO1 for 30 ks revealing a variety of redshifted and blue shifted lines from Si
and higher elements. The line ratios of various H/He-like ions as well as deduced
temperatures differed considerably from what has been observed with ASCA during
approximately the same phase. We intend to observe SS 433 at several more
precession phases (part III: eclipse) in order to monitor the plasmas conditions
at the base of the jet as well as measure the X-ray Doppler shifts of the lines
from the precessing jet.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
19:11:49.50 +04:58:58.00 SS 433 ACIS-S HETG 25.00
===================================================================================
Proposal Number: 02400070
Proposal Title: HIGH RESOLUTION X-RAY SPECTROSCOPY OF THE PRECESSING JET IN SS
433 (PART II)
PI: CLAUDE CANIZARES
Subject Category: BH AND NS BINARIES
Abstract: SS 433 is quite a unique galactic X-ray binary. The X-ray emission from
emerging jets are of thermal origin. The cooling hydrodynamical outflow in form
of a jet has dimensions of the binary separation. SS 433 has been observed during
AO1 for 30 ks revealing a variety of redshifted and blue shifted lines from Si
and higher elements. The line ratios of various H/He-like ions as well as deduced
temperatures differed considerably from what has been observed with ASCA during
approximately the same phase. We intend to observe SS 433 at several more
precession phases (part II: 0.65) in order to monitor the plasmas conditions at
the base of the jet as well as measure the X-ray Doppler shifts of the lines from
the precessing jet.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
19:11:49.50 +04:58:58.00 SS 433 ACIS-S HETG 25.00
===================================================================================
Proposal Number: 02400090
Proposal Title: ACCRETION DISK LINES AND CONTINUUM IN 4U 1820-30
PI: STEPHEN MURRAY
Subject Category: BH AND NS BINARIES
Abstract: We propose to use the ACIS-HETG to study the spectral evolution of 4U
1820-30. We seek to accurately measure the 6.4 keV Fe line and look for narrow
line components superimposed that may likely arise from re-processing on the
companion (white dwarf) star. We can measure the equivalent width and the
velocities as a function of accretion rate and orbital phase to constrain the
orgin of the emission. Also, by measuring changes in line EW and width between a
low vs. high state, we can test Comptonization models for an accretion disk
corona at differing optical depths.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
18:23:40.50 -30:21:40.00 NGC6624 ACIS-S HETG 10.00
18:23:40.50 -30:21:40.00 NGC6624 ACIS-S HETG 10.00
===================================================================================
Proposal Number: 02400133
Proposal Title: HIGH RESOLUTION UV/X-RAY SPECTROSCOPY OF SMC X-1
PI: SAEQA VRTILEK
Subject Category: BH AND NS BINARIES
Abstract: We propose simultaneous observations of the X-ray pulsar system SMC
X-1/SK160 with HST/STIS, Chandra, and ground-based optical telescopes. We will
search for correlation between orbital phase and ``bleaching'' of important P
Cygni lines by X-ray photoionization. We will model the X-ray, UV, and optical
continuum emission at different phases of the superorbital period. Using the
Chandra ACIS-S in CC mode we will conduct pulse-phased spectroscopy of the X-ray
emission. Our multiwavelength observations will enable us to analyze the density
structure and composition of the wind; set limits on the size, shape, rotation,
and precession of the disk; and determine the effects of X-ray illumination on
the disk, the star, and the stellar wind.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
01:17:05.20 -73:26:34.60 SMC X-1 ACIS-S NONE 6.00
01:17:05.20 -73:26:34.60 SMC X-1 ACIS-S NONE 6.00
01:17:05.20 -73:26:34.60 SMC X-1 ACIS-S NONE 6.00
01:17:05.20 -73:26:34.60 SMC X-1 ACIS-S NONE 6.00
01:17:05.20 -73:26:34.60 SMC X-1 ACIS-S NONE 6.00
01:17:05.20 -73:26:34.60 SMC X-1 ACIS-S NONE 6.00
01:17:05.20 -73:26:34.60 SMC X-1 ACIS-S NONE 6.00
01:17:05.20 -73:26:34.60 SMC X-1 ACIS-S NONE 6.00
===================================================================================
Proposal Number: 02400153
Proposal Title: PHASE RESOLVED SPECTROSCOPY OF THE X-RAY P-CYGNI PROFILES FROM
CIRCINUS X-1
PI: WILLIAM BRANDT
Subject Category: BH AND NS BINARIES
Abstract: In a Cycle 1 HETGS observation of the extremely luminous and violent
X-ray binary Cir X-1, we have discovered many new X-ray emission lines showing
broad P-Cygni profiles; these are from H-like and He-like ions of Ne, Mg, Si, S,
Ar and Fe. The lines originate in a high-velocity (up to 2000 km/s) outflow,
probably an accretion disk wind that is shielded by the outer disk bulge. The
P-Cygni profiles are also likely related to the unusually broad, asymmetric
H-alpha line observed from Cir X-1. We propose three 8 ks observations designed
to measure the X-ray P-Cygni profiles at key phases of the 16.5-day orbital cycle
and critically test our model for the origin of these remarkable lines. We expect
line strength and profile variability due to changes in mass accretion rate and
disk shielding.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
15:20:41.00 -57:10:00.00 CIR X-1 ACIS-S HETG 8.00
15:20:41.00 -57:10:00.00 CIR X-1 ACIS-S HETG 8.00
15:20:41.00 -57:10:00.00 CIR X-1 ACIS-S HETG 8.00
===================================================================================
Proposal Number: 02400161
Proposal Title: XTE J1739-302 IN QUIESCENCE
PI: DAVID SMITH
Subject Category: BH AND NS BINARIES
Abstract: This unusual x-ray transient was seen once in outburst with RXTE in
1997. It has the spectrum typical of an x-ray pulsar, making it likely to be a
Be/NS binary, and therefore to have significant quiescent emission. Its outburst
luminosity was near the highest ever seen from one of these systems. We propose a
series of two Chandra pointings to find its precise location (for counterpart
identification), luminosity, quiescent spectrum, and pulse period. If it is not
seen by Chandra, or has a flux much lower than predicted, then it would be the
only known transient with an x-ray pulsar spectrum and a very high
outburst/quiescence ratio (the latter being typical of soft x-ray transients).
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
17:38:57.60 -30:18:36.00 XTE J1739-302 ACIS-I NONE 5.00
===================================================================================
Proposal Number: 02400179
Proposal Title: HIGH RESOLUTION SPECTROSCOPY OF THE ADC SOURCE 2S0921-630
PI: TIMOTHY KALLMAN
Subject Category: BH AND NS BINARIES
Abstract: We propose to observe the high inclination low mass X-ray binary
2S0921-630 in order to test the hypothesis that the residual X-rays seen during
eclipse are due to reprocessing and scatttering in an accretion disk corona. By
observing the iron K line and lines from medium-Z elements at high resolution
using the HETG, we can determine the ionization state and emission measure, and
thereby infer the density and size of the corona. Using the ACIS detector we can
test for variability in the spectrum during the eclipse, and constrain the
geometrical extent of the corona. This source is ideal for such a study owing to
its demonstrated strong line emission and its long eclipse.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
09:22:34.70 -63:17:42.00 2S0921-630 ACIS-S HETG 80.00
===================================================================================
Proposal Number: 02400252
Proposal Title: DOPPLER-SHIFTED EMISSION LINES FROM THE JETS OF 1E1740.7-2942?
PI: WEI CUI
Subject Category: BH AND NS BINARIES
Abstract: During Cycle 1 we observed 1E1740.7-2942 with the HETGS for 10 ks (but
with an effective exposure only 7 ks). The dispersed grating spectrum shows
marginal detection of weak, narrow emission lines. Nearly all of the lines could
be identified with highly ionized species such as H-like and He-like Fe, Ca, S,
and Ar, if some of the line pairs (which are otherwise difficult to interpret)
are attributed to the Doppler red- and blue-shifted lines from the jets which are
known to be always present in the system. To verify this exciting scenario, we
propose to observe the source again for 70 ks with a more appropriate set of data
modes. The observation would increase the significance of any physical lines from
about 2 sigma to 5 sigma, which would place the interpretation on a much firmer
ground.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
17:43:54.80 -29:44:42.60 1E1740.7-2942 ACIS-S HETG 70.00
17:43:54.80 -29:44:42.60 1E1740.7-2942 ACIS-S HETG 70.00
===================================================================================
Proposal Number: 02400316
Proposal Title: THE X-RAY EMISSION ASSOCIATED WITH THE BLACK WIDOW PULSAR
B1957+20
PI: BENJAMIN STAPPERS
Subject Category: BH AND NS BINARIES
Abstract: The wind is the primary mechanism for carrying away a pulsar's
spin-down energy, hence determining its nature is of central importance. The
eclipsing binary PSR B1957+20 is presently the only system where we can study the
wind of a weakly magnetized pulsar. Its wind ablates and heats its companion and
powers a bow-shock nebula. ROSAT detections show that the wind produces X-rays,
but can't confirm their origin. We propose Chandra observations where the spatial
resolution will for the first time allow us to distinguish bow-shock and
intra-binary emission, and if the latter, they will be sensitive to orbital
modulations distinguishing between the companion and the pulsar as the origin.
With this we will better determine the energy and particle composition of a
low-magnetic field pulsar wind
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
19:59:36.80 +20:48:15.10 PSR B1957+20 ACIS-S NONE 43.00
===================================================================================
Proposal Number: 02400382
Proposal Title: SEARCHING FOR X-RAY PULSARS IN M31
PI: PHILIP KAARET
Subject Category: BH AND NS BINARIES
Abstract: Study of x-ray sources in external galaxies (other than the LMC and
SMC) has been limited to flux and spectral measurements. Classification of the
sources based on such observations is often ambiguous. We propose to use the high
resolution and large collecting area of Chandra to search for pulsations from
x-ray sources in M31. These observations should lead to unambiguous
identification of luminous accreting x-ray pulsars and may permit discovery of
very young rotation powered pulsars.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
00:42:42.30 +41:16:08.40 M31 HRC-I NONE 50.00
===================================================================================
Proposal Number: 02400455
Proposal Title: X-RAY BURSTERS WITH LOW PERSISTENT X-RAY LUMINOSITIES
PI: FRANK VERBUNT
Subject Category: BH AND NS BINARIES
Abstract: We propose to make snap-shot observations of new X-ray sources detected
only during type I bursts, with persistent X-ray luminosities <10^36 erg/s. We
expect to detect the systems easily, and will obtain accurate positions for
optical/infrared followup and estimates of the luminosity level. We thus can
study that part of the population of low-mass X-ray binaries which has persistent
X-ray luminosities below 10^36 erg/s, and test theory of thermonuclear bursts in
the low accretion regime.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
13:24:27.00 -63:13:26.00 SAX J1324.5-6313 ACIS-S NONE 5.00
17:52:24.00 -31:37:42.00 SAX J1752.3-3138 ACIS-S NONE 5.00
17:53:34.00 -23:49:24.00 SAX J1753.5-2349 ACIS-S NONE 5.00
18:06:34.00 -22:15:06.00 SAX J1806.5-2215 ACIS-S NONE 5.00
18:18:44.00 +14:24:12.00 SAX J1818.7+1424 ACIS-S NONE 5.00
===================================================================================
Proposal Number: 02400398
Proposal Title: A SEARCH FOR X-RAY JETS IN TWO MICRO-QUASARS
PI: WILLIAM HEINDL
Subject Category: BH AND NS BINARIES
Abstract: We propose to make detailed images with the HRC-I of the two Galactic
"micro-quasars" GRS 1758-258 and 1E 1740.7-2942 in order to search for X-ray
jets. Both sources have spectral and timing properties which are quite similar to
the canonical black hole candidate Cyg X-1. They are also, however, associated
with the time variable cores of double-lobed radio sources. This morphology is
quite reminiscent of the extra-galactic radio sources, but on parsec length
scales. In analogy with the radio loud AGN, we plan to search for X-ray jets
which may feed the radio lobes. Because the jets may be less than an arcsecond in
length, we will use the high resolution imaging capabilities of the HRC-I.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
18:01:13.20 -25:44:29.00 GRS 1758-258 HRC-I NONE 10.00
===================================================================================
Proposal Number: 02400492
Proposal Title: DO QUIESCENT BLACK HOLE ACCRETION DISKS ACCRETE?
PI: MICHAEL GARCIA
Subject Category: BH AND NS BINARIES
Abstract: There is currently a raging debate within the black hole community
which can be summarized as: Do the black holes in quiescent x-ray nova accrete
(or not)?. The answer to this question is fundamental to black hole research, for
example a positive answer supports the 'proof' of event horizons in black holes,
while a negative answer discredits this proof. XTE J1118+480 is likely the
nearest black hole x-ray nova, and definitely has the lowest A_V. Chandra (and
HST) observations of this system during the mini-outbursts which may occur in AO2
will allow the most complete view of a black hole accretion disk during a time
when the mass transfer in the outer disk is enhanced. Our study should determine
if the mass transfer into the black hole is similarly enhanced.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
11:18:10.80 +48:02:11.00 XTE J1118+480 ACIS-S LETG 5.00
11:18:10.80 +48:02:11.00 XTE J1118+480 ACIS-S LETG 5.00
11:18:10.80 +48:02:11.00 XTE J1118+480 ACIS-S LETG 5.00
===================================================================================
Proposal Number: 02400498
Proposal Title: CHANDRA OBSERVATIONS OF FAST SPINNING HARD TRANSIENTS IN
QUIESCENCE: PROBING THE SPECTRUM DEEP IN THE PROPELLER REGIME
PI: SERGIO CAMPANA
Subject Category: BH AND NS BINARIES
Abstract: We propose Chandra observations of five HXRTs containing fast spinning
and/or high magnetic field neutron stars to probe their quiescent emission. Due
to their faintness these sources are likely in an accretion regime which does not
allow matter to fall directly onto the neutron star surface (propeller state).
Indeed, we have already carried out BeppoSAX observations onsome of these sources
with promising results as the dramatic increase in the X-ray luminosity by a
factor of 100 in 15 hr in 4U 0115+63, interpreted as the overcome of the
centrifugal barrier. The selected sample allows us to probe the physics of the
propeller in a variaty of conditions (P=69 ms-103 s / B=10^11-10^13 G), and in a
range of luminosities unaccessible to previous X-ray missions.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
03:34:59.90 +53:10:23.20 V 0332+53 ACIS-S NONE 5.00
===================================================================================
Proposal Number: 02400584
Proposal Title: SPECTROSCOPY OF THE MICROQUASAR GRO J1655-40 DURING OUTBURST
PI: DUANE LIEDAHL
Subject Category: BH AND NS BINARIES
Abstract: We propose a 40 ksec Chandra HETG TOO observation of the microquasar
GRO J1655-40 during outburst. The object shows both radio-loud and radio-quiet
X-ray outbursts, with relativistic jets accompanying the radio outbursts. Clear
evidence for complex absorption in the iron K band has been observed with ASCA.
The HETG can be used to great advantage here, allowing us to extract detailed
line diagnostics and, through precise measurements of redshifts, determine the
location and kinematic properties of the absorber. GRO J1655-40 represents a
unique opportunity to explore (``up close'') transient outburst accretion physics
near a black hole.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
16:54:00.10 -39:50:44.90 GRO J1655-40 ACIS-S HETG 40.00
===================================================================================
Proposal Number: 02400625
Proposal Title: DETAILED STUDY OF THE IRON LINE AND LOW ENERGY FEATURES IN Z AND
ATOLL SOURCES
PI: NATALE ROBBA
Subject Category: BH AND NS BINARIES
Abstract: We propose Chandra HETGS observations of the atoll source 4U 1705-44
and the Z source GX 340+0 for 30 ks each, to perform a detailed study of the iron
K$\alpha$ line, and the correlation between line parameters and kHz QPOs. These
sources are known to show broad ($\sim 1$ keV FWHM) iron K$\alpha$ lines: several
hypothesis were proposed to explain their width ({\it e.g.} relativistic and
Doppler effects in an accretion disk, Compton scattering, line-blending), and we
expect that the high energy resolution (the highest in the iron line range) of
the Chandra HETGS will be able to resolve the complex line shape and to constrain
the various models proposed.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
16:45:47.60 -45:36:39.00 GX340+0 ACIS-S HETG 5.00
16:45:47.60 -45:36:39.00 GX340+0 ACIS-S HETG 25.00
17:09:00.40 -44:06:48.00 4U1705-44 ACIS-S HETG 5.00
17:09:00.40 -44:06:48.00 4U1705-44 ACIS-S HETG 25.00
===================================================================================
Proposal Number: 02400631
Proposal Title: 4U 2129+47: FROM ADIOS TO ADAF OR ISOLATED NEUTRON STAR?
PI: MICHAEL NOWAK
Subject Category: BH AND NS BINARIES
Abstract: 4U2129+47 is one of the three original `Accretion Disk Corona' sources.
The partial X-ray eclipses in these near edge-on systems imply that the X-ray
emission must extend over radii a substantial fraction of the binary separation,
possibly related to an outflow, as in models of `Adiabatic Inflow/Outflow'
accretion. Since 1983 4U2129+47 has been in a protracted quiescent state. Two
models exist for this state: `Advection Dominated Accretion' or thermal emission
from the cooling surface of the neutron star. The latter would imply a sharp,
total eclipse in the lightcurve. We propose a 38 ksec (two binary orbits) Chandra
observation of 4U2129+47 which will test thermal emission models of the quiescent
spectrum and determine whether any eclipse in the observed lightcurve is total or
partial.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
21:31:26.20 +47:17:24.00 4U2129+47 ACIS-S NONE 38.00
===================================================================================
Proposal Number: 02400678
Proposal Title: DYNAMICS OF THE IONIZED STELLAR WIND IN VELA X-1
PI: STEVEN KAHN
Subject Category: BH AND NS BINARIES
Abstract: We propose to observe the archetypal low-luminosity high mass X-ray
binary, Vela X-1 to study the dynamics of the stellar wind in the system. The
high resolving power capabilities of the Chandra HETGS will allow us study the
ionization structure and geometrical distribution of matter in the circumstellar
medium through accurate measurements of emission measures and Doppler shifts of
bright emission lines during several different orbital phases. We will also be
able to simultaneuously constrain some of the key stellar wind parameters
including the mass-loss rate and velocity structure of the stellar wind.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
09:02:06.90 -40:33:16.90 VELA X-1 ACIS-S HETG 30.00
09:02:06.90 -40:33:16.90 VELA X-1 ACIS-S HETG 35.00
09:02:06.90 -40:33:16.90 VELA X-1 ACIS-S HETG 85.00
===================================================================================
Proposal Number: 02400714
Proposal Title: TEMPORAL EVOLUTION OF TRANSIENT TYPE I BURSTERS IN QUIESCENCE
PI: LARS BILDSTEN
Subject Category: BH AND NS BINARIES
Abstract: In transiently accreting neutron stars (NSs), the NS crusts are heated
during the accretion outbursts. The timescale on which this heat is radiated away
after outburst depends on the depth where this heat is deposited. In deep crustal
heating, the relevant depths have thermal timescales of days -- years, with most
being radiated on a 2 yr timescale. We request observations to observe transient
NSs soon after they return to quiescence, to observe this evolution. This
proposal is a resubmission of a partially granted ToO proposal which was not
triggered during AO1.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
19:11:16.00 +00:35:06.00 AQL X-1 HRC-S LETG 10.00
19:11:16.00 +00:35:06.40 AQL X-1 ACIS-S NONE 8.00
19:11:16.00 +00:35:06.40 AQL X-1 ACIS-S NONE 8.00
19:11:16.00 +00:35:06.40 AQL X-1 ACIS-S NONE 8.00
19:11:16.00 +00:35:06.40 AQL X-1 ACIS-S NONE 8.00
===================================================================================
Proposal Number: 02400819
Proposal Title: QUIESCENT AND LOW LUMINOSITY X-RAY BINARIES
PI: CRAIG MARKWARDT
Subject Category: BH AND NS BINARIES
Abstract: The galactic bulge contains many old neutron star and black hole
binaries now identified as low luminosity X-ray sources. Observed sources can be
persistent at a level of a few mCrab, or transients which peak at 10-200 mCrab
and then fade to quiescent levels <0.5 mCrab. Theoretical models, including
ADAFs, propeller effects, and thermal surface emission, have been tested on only
a handful of sources. We propose Chandra observations of 4 faint low mass
binaries, XTE J1710-281, XTE J1743-363, SAX J1747.0-2853, and XTE J1723-376, the
first two persistently variable and the second two in apparent quiescence.
Observations of 30 ks with ACIS I and S would provide for improved positions,
light curves and spectra for the active sources, and at least a flux measurement
for the quiescent ones.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
17:23:38.10 -37:39:44.60 XTE J1723-376 ACIS-I NONE 30.00
17:47:09.10 -28:53:01.00 SAX J1747.0-2853 ACIS-S HETG 30.00
===================================================================================
Proposal Number: 02400850
Proposal Title: ACIS-HETG OBSERVATIONS OF MICROQUASAR XTE J1748-288
PI: JULIA LEE
Subject Category: BH AND NS BINARIES
Abstract: RXTE observations of the recently discovered microquasar XTE J1748-288
reveal spectral differences between the very high, high, and low state. ASCA \&
RXTE observations show prominent iron line(s). We propose HETG 140ks total
exposure over these 3 phases in order to characterize the X-ray spectral features
and resolve presently unknown lines for these 3 phenomenological states. We will
also look for emission lines from any X-ray jet, and P-Cygni profiles indicative
of a disk-wind. This will allow for a comprehensive study (when compared to our
Cycle 1 Chandra observations of GRS1915+105, SS433, and Cir X-1) of GBC systems,
and in particular of the poorly understood systems termed microquasars.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
17:48:08.00 -28:28:48.00 XTE J1748-288 ACIS-S HETG 30.00
17:48:08.00 -28:28:48.00 XTE J1748-288 ACIS-S HETG 40.00
17:48:08.00 -28:28:48.00 XTE J1748-288 ACIS-S HETG 70.00
===================================================================================
Proposal Number: 02400903
Proposal Title: HIGH RESOLUTION SPECTROSCOPY OF THE X-RAY BURSTER 4U 1636-53
PI: NORBERT SCHULZ
Subject Category: BH AND NS BINARIES
Abstract: The LMXB 4U 1636-53 is a prototype atol source in which a neutron star
accretes matter from a low mass companion star producing moderate to
sub-Eddington X-ray luminosities. The X-ray luminosity, and thus to a large
extent mass-accretion rate, differs by orders of magnitude in different spectral
states. 4U 1636-53 is mostly found in its lower banana state, where it exhibits
type I X-ray bursts on quite regular time scales. It has been observed for 30 ks
in AO1 but was found in a very bright state with no bursts and severe pile-up
defects in the 1st order grating spectra. We propose to re-observe this target
for another 30 ks with significantly reduced CCD frametime.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
16:40:55.50 -53:45:05.00 4U 1636-53 ACIS-S HETG 30.00
===================================================================================
Proposal Number: 02400911
Proposal Title: MAPPING THE JETS OF SS 433
PI: MASAAKI NAMIKI
Subject Category: BH AND NS BINARIES
Abstract: ASCA revealed Doppler-shifted emission lines in its X-ray spectrum
originating from the two anti-parallel jets. The ASCA data indicated the X-ray
jet is $\sim10^{13}$~cm long \cite{Kotani97a}, ten times longer than the previous
estimations (e.g., \cite{Stewart87}, \cite{Watson86}). The data also suggest the
existence of an absorber, a disk outflow and/or matter distributed in the orbital
plain \cite{Kotani96}. Our proposal is to reveal the violent outflow/inflow of
SS~433, which is the only system ever know to be in a steady super-critical
accretion state, and to explore the nature of it.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
19:11:49.50 +04:58:58.10 SS 433 ACIS-S HETG 20.00
19:11:49.50 +04:58:58.10 SS 433 ACIS-S HETG 20.00
19:11:49.50 +04:58:58.10 SS 433 ACIS-S HETG 20.00
===================================================================================
Proposal Number: 02400913
Proposal Title: THE WIND AND ACCRETION DISK IN CEN X-3/V779 CEN
PI: PATRICK WOJDOWSKI
Subject Category: BH AND NS BINARIES
Abstract: We propose a 50 ks HETG observation of Cen X-3 out of eclipse in a low
state. We will observe emission lines from the wind and from the accretion disk
and inner accretion structure. From the fluxes of recombination lines we will
measure the density and ionization structure of the wind. From the the line
velocities we will measure the velocity and mass loss rate of the ionized wind.
By measuring the line velocities of fluorescent lines from near the neutron star
we will derive constraints on the location of inner accretion structures. This
observation complements an already executed Chandra observation of Cen X-3 in
eclipse.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
11:21:15.20 -60:37:24.00 CEN X-3 ACIS-S HETG 50.00
===================================================================================
Proposal Number: 02400917
Proposal Title: ACCRETION DISK STRUCTURE IN VARIOUS SPECTRAL STATES OF GRS
1915+105
PI: RONALD REMILLARD
Subject Category: BH AND NS BINARIES
Abstract: GRS~1915$+$105 displays 9 types of light curves that fall in 3
categories. In the steady-hard states, the Fe line is strongest, and there is a
steady type of jet. In the soft states, the accretion disk dominates the X-ray
spectrum, and we often detect the 67 Hz QPO thought to arise from GR effects in
the inner disk. The remaining states show a variety of instability oscillations,
some producing violent mass ejections. Progress on all fronts requires high
resolution spectra to help interpret the disk structure. We have particular
interest in the profiles of broad Fe emission, intending to gain physical
insights using theoretical models of Nayakshin et al. With monitoring timescales
selected to randomize the 9 states, we request 3 obs likely to sample different
conditions in the disk.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
19:15:11.60 +10:56:44.90 GRS 1915+105 ACIS-S HETG 30.00
19:15:11.60 +10:56:44.90 GRS 1915+105 ACIS-S HETG 30.00
19:15:11.60 +10:56:44.90 GRS 1915+105 ACIS-S HETG 30.00
===================================================================================
Proposal Number: 02400927
Proposal Title: WHERE IS OAO 1657-415?
PI: DEEPTO CHAKRABARTY
Subject Category: BH AND NS BINARIES
Abstract: The high-mass X-ray binary OAO 1657-415 consists of a 38 s pulsar
accreting from a (still unidentified) OB supergiant. The system is only the 7th
known eclipsing X-ray binary, and the only one which seems to form a transient
accretion disk from the companion's stellar wind. It provides a rare opportunity
to measure a neutron star mass, if the optical companion can be identified.
However, the X-ray position of this highly absorbed source is only known to 30
arcsec. I propose a short ACIS-HETG observation to determine its position
precisely, and probe the stellar wind of the companion using fluorescent X-ray
lines.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
17:00:47.10 -41:39:14.60 OAO 1657-415 ACIS-S HETG 5.00
===================================================================================
Proposal Number: 02408033
Proposal Title: CHANDRA OBSERVATIONS OF CYGNUS X-1 IN A RARE, SUSTAINED
HIGH/SOFT STATE
PI: JON MILLER
Subject Category: BH AND NS BINARIES
Abstract: The full SJ is contained in an email to the Director. A clear High/Soft
State was observed in Cyg X-1 between 15 Oct. and 15 Nov. 2000 (mean flux: 0.5-1
Crab, 2-12 keV RXTE ASM). Following a short Low/Hard state, the mean rate
returned to ~1 Crab on 7 Dec. 2000. This flux and observed spectral softness
indicate that Cygnus X-1 has entered a second sustained High/Soft state episode.
This outburst profile is similar to the 83-day High/Soft state observed May-Aug.
1996 (see http://xte.mit.edu/~rr/cygx1.ps). A Chandra observation of Cygnus X-1
(PI, Canizares; Cui et al. in prep.) in the Low/Hard state shows evidence for an
Fe K-alpha line, Fe L edges (Cui et al, in prep). The dynamics and geometry of
the L/Hard and H/Soft state are expected to be markedly different. Measurements
of the iron e
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
19:58:21.70 +35:12:05.80 CYGNUS X-1 ACIS-S HETG 30.00
===================================================================================
Proposal Number: 02408040
Proposal Title: A CHANDRA OBSERVATION OF THE LONG-DURATION TRANSIENT AND NEUTRON
STAR LOW-MASS X-RAY BINARY KS 1731-260 IN QUIESCENCE
PI: RUDY WIJNANDS
Subject Category: BH AND NS BINARIES
Abstract: The full scientific justification is sent in an email to the Director.
The long-duration transient KS 1731-260 has been active for over a decade,
however, our recent RXTE/PCA observations show that the source has now gone back
in to quiescence. This opens the oppertunity to study the affects of prolonged
accretion onto the neutron star on the quiescence X-ray properties of a neutron
star X-ray transient. This would be the first time ever that such a study can be
performed. Considerable differences (e.g., a considerable higher luminosity
compared to that of short-duration transients) are expected if the quiescence
properties depend on the time averaged accretion rate in outburst. We will also
obtain an excellent position of the source allowing the identification of its
optical and infrared counter parts.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
17:34:13.50 -26:05:16.80 KS 1731-260 ACIS-S NONE 20.00
===================================================================================
Proposal Number: 02408042
Proposal Title: HIGH RESOLUTION SPECTROSCOPY OF THE POSSIBLE JETS IN GRS
1758-258
PI: WILLIAM HEINDL
Subject Category: BH AND NS BINARIES
Abstract: As of 28 Feb, the microquasar GRS1758-258 has entered an extremely dim
x-ray state (RXTE- IAUC submitted). This is unlikely to happen again for 10
years. Two HRC observations in 2000 Sept/Oct revealed a variable point source
plus elongated (~1") emission. In one month, the morphology changed showing the
likely formation of an ~arcsecond x-ray jet. At the likely source distance
(8.5kpc), relativistic bulk motion would be required. The current state is ~3x
dimmer in RXTE than typical. We suspect the point source has turned off, and the
residual flux is from ejected material. Cui et al. (ACIS/HETG, astro-ph/0009380)
found extended emission around another microquasar, 1E1740.7-2942, and may have
detected spectral lines, but they could not separate the core and extended
components. We will measure the spectrum of the extended (jet?) emission without
point source contamination. This has the possibility of discovering red and
blue-shifted emission lines a la SS433.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
18:01:12.40 -25:44:35.90 GRS 1758-258 HRC-I NONE 10.00
18:01:12.40 -25:44:35.90 GRS 1758-258 ACIS-S HETG 30.00
===================================================================================
Proposal Number: 02408061
Proposal Title: LOCALIZATION AND IDENTIFICATION OF THE X-RAY TRANSIENT IN NGC
6440
PI: JEAN IN 'T ZAND
Subject Category: BH AND NS BINARIES
Abstract: X1745-203 in NGC 6440 is one of five X-ray transients in galactic
globular clusters, with recorded outbursts in 1971 and 1998. The last outburst
(In 't Zand et al, 1998, A&A 345, 100) was followed up by us with VLT and NTT
observations which identified two candidate optical counterparts (Verbunt et al,
2000, A&A 359, 960). Both of these have counterparts in a Chandra observation of
NGC 6440 taken during quiescence in July 2000. An accurate position of the X-ray
transient while it is active would secure the identification of the quiescent
X-ray as well as the optical counterpart. With such an identification, we can
study the quiescent X-ray emission and determine what it is due to. One of the
most likely explanations is emission from a cooling neutron star; if so, given
the known distance, we can directly measure the neutron-star radius. ASM/RXTE
observations show that X1745-203 has gone into outburst again, and this presents
the opportunity to determine the position of the transient.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
17:48:52.60 -20:21:33.80 NGC 6440 ACIS-S NONE 2.50
===================================================================================
Proposal Number: 02408064
Proposal Title: CYGNUS X-1 IN THE HIGH STATE
PI: WEI CUI
Subject Category: BH AND NS BINARIES
Abstract: Cyg X-1 is now in a rare high state, as seen by the ASM and radio
monitoring. Such a state transition occurs only once every few years, and
therefore offers a great opportunity for us to conduct a detailed study of this
important black hole candidate in the high state, making use some of the
unprecedented capabilities offered by Chandra. Previous Chandra observations of
the source have revealed the presence of numerous emission lines and absorption
edges (Schulz et al. 2001). There is already evidence that the line emission
seems to vary depending upon the state of the source (low state vs. flare). It
would, therefore, be very interesting to see how the source behaves in the high
state. The results would almost certainly shed light on the difference in X-ray
production processes and the binary environment between the low and high states,
and, ultimately, on the physical process that is responsible for triggering a
state transiton.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
19:58:21.60 +35:12:07.20 CYG X-1 ACIS-S HETG 30.00
***********************************************************************************
SN, SNR AND ISOLATED NS
--------------------------------------------------
===================================================================================
Proposal Number: 02500055
Proposal Title: OBSERVATION OF MKR 231
PI: GORDON GARMIRE
Subject Category: SN, SNR AND ISOLATED NS
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
12:56:14.30 +56:52:25.30 Mrk 231 ACIS-S NONE 40.00
===================================================================================
Proposal Number: 02500067
Proposal Title: NEAREST SNR
PI: GORDON GARMIRE
Subject Category: SN, SNR AND ISOLATED NS
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
08:52:00.00 -46:21:00.00 RX J0852.0-4622 ACIS-I NONE 1.00
08:52:00.00 -46:21:00.00 RX J0852.0-4622 ACIS-S HETG 16.00
08:52:00.00 -46:20:30.00 RX J0852.0-4622 ACIS-I NONE 3.00
08:52:01.38 -46:17:53.34 RX J0852.0-4622 ACIS-S NONE 31.00
===================================================================================
Proposal Number: 02500074
Proposal Title: G0.9+0.1 AND G74.9+1.2
PI: GORDON GARMIRE
Subject Category: SN, SNR AND ISOLATED NS
Abstract: This observation is search for central objects in G0.9+0.1 and
G74.9_1.2
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
17:47:23.60 -28:09:35.00 G0.9+0.1 ACIS-S NONE 35.00
20:15:60.00 +37:13:15.00 G74.9+1.2 ACIS-S NONE 20.00
===================================================================================
Proposal Number: 02500086
Proposal Title: EXPANSION OF THE SNR CAS-A
PI: STEPHEN MURRAY
Subject Category: SN, SNR AND ISOLATED NS
Abstract: A second epoch image of Cas-A with the HRC-I to compare with the AO-1
image. A direct measure of the expansion of the outer shock front, and the
various knots, filamnets and floculli will provide information on the kinematics
of this young SNR as it expands into the surrounding ISM. A timing analysis of
the central point-like source will be made to look for pulsations and to compare
with earlier epoch timing studies.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
23:23:27.85 +58:48:42.10 CAS-A HRC-S NONE 50.00
===================================================================================
Proposal Number: 02500117
Proposal Title: ACIS OBSERVATION OF THE LMC SUPERNOVA REMNANT N23
PI: STEPHEN HOLT
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose to observe the ISM-dominated remnant N23 in the Large
Magellanic Cloud using ACIS-S3 on Chandra. Our objectives are spatially resolved
spectroscopy and spectral imaging, in particular to distinguish between the
spectrum of the bright western side with the fainter north and east, and to
search for harder emission than was detected with ASCA.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
05:55:00.00 -68:01:45.00 Mispointing ACIS-S NONE 40.00
===================================================================================
Proposal Number: 02500119
Proposal Title: OBSERVATION OF SNR RCW103
PI: GORDON GARMIRE
Subject Category: SN, SNR AND ISOLATED NS
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
16:17:36.31 -51:02:24.72 RCW103 ACIS-I NONE 3.50
16:17:36.31 -51:02:24.72 RCW103 ACIS-I NONE 3.50
16:17:36.31 -51:02:24.72 RCW103 ACIS-I NONE 3.50
16:17:36.31 -51:02:24.72 RCW103 ACIS-I NONE 3.50
16:17:36.31 -51:02:24.72 RCW103 ACIS-I NONE 3.50
16:17:36.31 -51:02:24.72 RCW103 ACIS-S NONE 3.50
===================================================================================
Proposal Number: 02500120
Proposal Title: OBSERVATION OF SNR N49B
PI: GORDON GARMIRE
Subject Category: SN, SNR AND ISOLATED NS
Abstract: LMC SNR, a Sedov phase object for study with a large number of
photons.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
05:25:25.00 -65:59:22.00 N49B ACIS-S NONE 35.00
===================================================================================
Proposal Number: 02500044
Proposal Title: ACIS OBSERVATION OF THE SUPERNOVA REMNANT 3C397
PI: STEPHEN HOLT
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We will use ACIS-S on Chandra to observe the Galactic remnant 3C397.
Previous X-ray imaging observations show a central hot spot and an extended
bright region to the west; the integrated X-ray spectrum is seen to be very
complex, including a strong Fe K blend. We will search for a point source
embedded in the hot spot, and perform spatially resolved spectroscopy.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
19:07:35.00 +07:08:30.00 3C397 ACIS-S NONE 68.00
===================================================================================
Proposal Number: 02500046
Proposal Title: ACIS OBSERVATION OF THE SN AND SNR IN THE STARBURST GALAXY
NGC6946
PI: STEPHEN HOLT
Subject Category: SN, SNR AND ISOLATED NS
Abstract: The starburst galaxy NGC6946 contains six historical supernovae,
including SN1980K, which has been detected by ROSAT, and a young (~200 yr old),
highly luminous supernova remnant. We will use ACIS-S to observe these and other
sources in this galaxy.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
20:34:49.00 +60:09:19.00 NGC 6946 ACIS-S NONE 60.00
===================================================================================
Proposal Number: 02500130
Proposal Title: SN1987A MONITORING
PI: GORDON GARMIRE
Subject Category: SN, SNR AND ISOLATED NS
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
05:35:28.10 -69:16:10.80 SN1987A ACIS-S NONE 20.00
===================================================================================
Proposal Number: 02500132
Proposal Title: HIGH RESOLUTION SPECTRA OF YOUNG SUPERNOVA REMNANTS
PI: CLAUDE CANIZARES
Subject Category: SN, SNR AND ISOLATED NS
Abstract: The public Chandra observations of Cas A reveal spectral variations and
knots/features on small scales. Despite its large angular extent, modeling
suggests that a grating observation of Cas A may yield high resolution spectral
information. N103b in the LMC, is a good candidate for a grating observation in
that its overall extent is small, and it shows substructure on the scale of a few
arcseconds. Moreover, it is arelatively young SNR, known to have Xray lines at
energies well suited to the HETG. Success with a similar observation (E0102 - 72)
suggests that this spectrum will yield ejecta velocieties, abundances and plasma
conditions.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
05:09:03.90 -68:43:19.00 N103B ACIS-S HETG 20.00
05:09:03.90 -68:43:19.00 N103B ACIS-S HETG 25.00
05:09:03.90 -68:43:19.00 N103B ACIS-S HETG 75.00
23:23:28.00 +58:48:42.50 CAS A ACIS-S HETG 70.00
===================================================================================
Proposal Number: 02500134
Proposal Title: GAMMA-RAY BURSTS: DISCOVERING THE PROGENITORS AND UNDERSTANDING
THE EXPLOSION
PI: SHRINIVAS KULKARNI
Subject Category: SN, SNR AND ISOLATED NS
Abstract: Gamma-ray burst astronomy, one of the most active and exciting
frontiers in astrophysics, is now entering a critical stage -- with dramatic
leaps in our understanding of these events, as well as new discoveries imminent.
Given the recent progress in this field, we are now in a position to design
precision, broadband measurements that can provide quantitative information on
the as-yet unknown energy sources, the explosion geometry, and the surrounding
medium. We propose a set of HST TOO and standard observations, synergistic with
ground-based radio, IR and optical observations, as well as co-ordinated Chandra
measurements, designed to answer the outstanding and fundamental questions in GRB
astronomy.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
GRB TOO 1 ACIS-S NONE 20.00
GRB TOO 1 ACIS-S NONE 20.00
GRB TOO 1 ACIS-S NONE 47.00
14:52:12.60 +43:01:06.30 GRB 010222 ACIS-S NONE 20.00
17:04:09.60 +51:47:11.20 GRB 000926 ACIS-S NONE 33.00
===================================================================================
Proposal Number: 02500203
Proposal Title: A POSSIBLE IDENTIFICATION FOR THE EGRET SOURCE 3EG J2227+6122
PI: JULES HALPERN
Subject Category: SN, SNR AND ISOLATED NS
Abstract: The identity of the persistent, high-energy gamma-ray sources in the
Galactic plane remains a mystery. The most likely scenario is a population of
young to middle-aged pulsars, many of which could be radio quiet like Geminga. We
have an ongoing program of X-ray, radio, and optical observations of selected
EGRET error circles at intermediate Galactic latitude. For one of these fields,
at (l,b)=(106,+3), our complete census of X-ray and radio sources reveals a
remarkable association between a radio shell and a nonthermal X-ray source with
no optical counterpart, making it a plausible candidate for a pulsar with a
wind-blown nebula. A Chandra observation is needed to discover and obtain a
precise position for the pulsar, and to characterize its surrounding nebula.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
22:29:05.00 +61:14:12.90 3EG J2227+6122 ACIS-I NONE 20.00
===================================================================================
Proposal Number: 02500306
Proposal Title: EXPLORING SHOCK CONDITIONS IN THE PUPPIS A SNR
PI: UNA HWANG
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose a study of the bright supernova remnant Puppis A using
ACIS-S, with five pointings covering a representative sample of features,
including a portion of the shock front in the east, two shocked interstellar
clouds in different environments, and a knot and filament in the interior of the
remnant. These data will allow us to measure spectral due to the ionization
structure behind the shock front under a variety of densities and geometries.
Chandra is the first and only instrument that provides angular resolution
necessary to track such changes on arcsecond scales.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
08:22:00.00 -42:36:43.00 PUPPIS N KNOT ACIS-S NONE 20.00
08:23:25.20 -42:44:21.30 PUPPIS A SHOCK FRONT ACIS-S NONE 15.00
08:24:08.00 -42:57:00.00 PUPPIS BRIGHT E KNOT ACIS-S NONE 10.00
===================================================================================
Proposal Number: 02500308
Proposal Title: CAS A: FIRST CLOSE-UP VIEWS OF HOT PLASMA EVOLUTION
PI: LAWRENCE RUDNICK
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose to measure the proper motions and changes in brightness,
structure and spectrum of compact features in the Cas A supernova remnant over a
two-year baseline. At a fundamental level, this important remnant is governed by
the physical evolution of inhomogeneities on all scales, both in its ejecta and
in the circumstellar medium. Its multiple interacting plasmas - thermal and
relativistic - have distinct kinematics and their relationships are poorly
understood. With this very first look at the evolution of the several X-ray
emitting plasmas, and our continuing extensive radio and numerical simulation
programs, we will take the required next major steps in uncovering Cas A's basic
physical nature. [Includes E/PO proposal.]
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
23:23:26.70 +58:49:03.00 CAS A ACIS-S NONE 50.00
===================================================================================
Proposal Number: 02500322
Proposal Title: SEARCHING FOR THE PULSED X-RAY EMISSION FROM THE COMPACT REMNANT
IN G292.0+1.8
PI: JOHN HUGHES
Subject Category: SN, SNR AND ISOLATED NS
Abstract: Within its first year Chandra has discovered in the two youngest
Galactic oxygen-rich supernova remnants, Cas A and G292.0+1.8, point-like sources
that are likely the compact remnants of these SN explosions. Here we propose
sensitive HRC observations to search for the pulsed X-ray emission from the newly
discovered compact object in G292.0+1.8.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
11:24:39.40 -59:16:21.60 CXOUJ112439.4-591622 HRC-S NONE 50.00
===================================================================================
Proposal Number: 02500326
Proposal Title: THE PROPER MOTION OF THE SOFT GAMMA REPEATER SGR1900+14
PI: KEVIN HURLEY
Subject Category: SN, SNR AND ISOLATED NS
Abstract: There is good evidence that the soft gamma repeaters are magnetars,
i.e. neutron stars with magnetic fields B~10^15 G. The magnetar model predicts
that they may be born with very high velocities, and SGR1900+14 appears to be an
extreme example of this. Indeed its likely transverse proper motion is so large
that it can be measured by a simple Chandra observation. This is an important
test of the model. Even if the star is moving slowly, Chandra can put stringent
bounds on its transverse motion. Either outcome would have a significant impact
on our understanding of SGRs. We believe that this would be the first time that
X-ray measurements have been used to perform accurate astrometry and derive a
proper motion.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
19:07:14.30 +09:19:20.10 SGR1900+14 ACIS-I NONE 30.00
===================================================================================
Proposal Number: 02500349
Proposal Title: UNCOVERING THE YOUNG NEUTRON STAR IN G327.1-1.1
PI: PATRICK SLANE
Subject Category: SN, SNR AND ISOLATED NS
Abstract: Despite estimates which suggest that supernovae should lead to the
formation of a pulsar every 100 years or so, the census of young neutron stars is
sparse. Yet it is these objects which provide the only direct measurements of
neutron star birth parameters. Composite SNRs provide laboratories which both
lead us to these neutron stars and provide us with a direct means for determining
their properties. G327.1-1.1 is a composite SNR for which radio and X-ray
observations point the way toward a currently unseen pulsar. We propose Chandra
observations to study a compact X-ray source which appears likely to be a young
pulsar in this system, and to investigate its early evolution and properties
through spectral studies of both the source and its synchrotron nebula.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
15:54:25.00 -55:04:06.00 G327.1-1.1 ACIS-I NONE 50.00
===================================================================================
Proposal Number: 02500350
Proposal Title: PROBING THE GRB-SN CONNECTION WITH CHANDRA
PI: CHRYSSA KOUVELIOTOU
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose to image the field of SN 1998bw to definitively test the
association of the supernova with GRB 980425. BeppoSAX X-ray observations of the
field have revealed 2 sources (S1, S2) separated by 4.5', each located with 1.5'
uncertainty. S1 `coincides' with the SN and exhibits a power-law temporal decay,
while S2 is detected (at the BeppoSAX/NFI sensitivity level) to vary around a
constant flux value. Chandra ACIS-S observations will enable us (i) to locate S1
and S2 with subarcsec accuracy, (ii) to resolve and determine the flux level and
thus the nature of each source and measure their spectrum, and (iii) constrain
the energetics of the SN explosion.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
19:35:03.30 -52:50:44.80 SN1998BW ACIS-S NONE 50.00
===================================================================================
Proposal Number: 02500396
Proposal Title: THE X-RAY COUNTERPART OF 5 MARCH 1979
PI: SHRINIVAS KULKARNI
Subject Category: SN, SNR AND ISOLATED NS
Abstract: SGR 0526-66 provided the key observations on which the magnetar model
for SGRs and AXPs was constructed. This SGR will continue to play a central role
(as shown by intensive observations with missions such as HST and ROSAT) given
that it is not obscured (unlike the other four SGRs). We request a total of four
observations (60 ksec, 3x20 ksec) of CXO time to observe SGR 0526-66 with ACIS-S
with three goals in mind. [1] Confirm the possible 4.02-s period discovered in
AO-1 observations. [2] Determine dP/dt, an essential physical parameter in any
model for SGRs. [3] Possibly determine the maximum blackbody luminosity of a
magnetar by taking advantage of the variability of the source. The superb spatial
resolution of CXO is essential as this SGR is in the second brightest SNR in the
LMC.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
05:26:00.80 -66:04:36.50 SGR 0526-66 ACIS-S NONE 7.00
05:26:00.80 -66:04:36.50 SGR 0526-66 ACIS-S NONE 53.00
===================================================================================
Proposal Number: 02500403
Proposal Title: EXPLORING THE MYSTERIES OF MIXED MORPHOLOGY SUPERNOVA REMNANTS
PI: ROBIN SHELTON
Subject Category: SN, SNR AND ISOLATED NS
Abstract: The centers of "mixed morphology" supernova remnants are surprisingly
bright in thermal X-rays. To explain this mystery, multiple explanations have
been proposed. Each has wide ranging ramifications. We propose to examine these
issues using observations of W44, the best case-study candidate. Chandra images
will resolve the remnant's small scale structure, putatively associated with
evaporating clouds. Computer modeling with a detailed hydrodynamic code shows
that the emission line structure of Chandra spectra will easily indicate the
ionizational properties of the X-ray producing gas, thus distinguishing between
hypotheses and placing needed limits on the allowed rates of thermal conduction,
cloud evaporation, and ejecta mixing.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
18:55:59.30 +01:20:07.00 W44 CENTER ACIS-S NONE 50.00
===================================================================================
Proposal Number: 02500407
Proposal Title: SN1006 AND THE PHYSICS OF SHOCKS II: DEVELOPMENT OF THERMAL
SHOCKS
PI: KNOX LONG
Subject Category: SN, SNR AND ISOLATED NS
Abstract: With fine Balmer filaments marking the location of a shock shown by
optical and UV spectroscopy to be moving at 2300 km/s, the NW limb of SN1006
provides a unique environment for understanding physical processes in
high-velocity shocks. We propose a 100 ks ACIS-S study of the NW limb to measure
the developing ionization and temperature structure 2-20" behind this shock and
to characterize the reverse-shocked ejecta. Coupling this Cycle 2 observation of
the thermally-dominated NW limb and our Cycle 1 pointing at the
synchrotron-dominated NE limb, we will explore the effect of magnetic-field
orientation on the development of fast shocks, a crucial step to understanding
young SNRs. These studies are possible only with the combination of spatial and
spectral resolution available with ACIS.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
15:02:22.00 -41:47:20.00 SN1006 NW ACIS-S NONE 100.00
===================================================================================
Proposal Number: 02500409
Proposal Title: A STUDY OF LESSER KNOWN GALACTIC SUPERNOVA REMNANTS
PI: JACCO VINK
Subject Category: SN, SNR AND ISOLATED NS
Abstract: I propose here to observe five galactic shell-type supernova remnants,
for which no or limited X-ray data exist. The remnants were selected from the
MOST SNR Catalogue of Southern Galaxies and are all close to the galactic plane.
They are small and probably heavily absorbed, which hampered their detailed X-ray
study with previous X-ray telescopes. This small sample will widen our
perspective on young shell-type supernova remnants.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
16:15:09.80 -50:42:03.00 G332.+0.1 ACIS-I NONE 30.00
===================================================================================
Proposal Number: 02500496
Proposal Title: RESOLVING THE X-RAY STRUCTURE OF SHOCK-WAVE/ISM INTERACTIONS IN
THE CYGNUS LOOP: PROBING RADIATIVE SHOCK PHYSICS
PI: TERRANCE GAETZ
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose an 80 ks ACIS-S3 observation centered on the Cygnus Loop
"XA" region, a region rich with shocks tracing interactions of the blast wave
with the interstellar medium. The field offers a chance to improve our
understanding of shock physics: it contains examples from all stages of the
catastrophic transition from a nonradiative to a fully radiative shock. Over much
of the region, we will be able to extract ~10^4 count spectra in ~100" x 3"
strips guided by the detailed optical, UV, and X-ray morphology. Chandra's
angular resolution allows us to minimize confusion resulting from adjacent (in
projection) structures. We will sample the X-ray stratification on scales
comparable to those in optical and UV data, providing more stringent constraints
on shock evolution models.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
20:57:13.32 +31:03:09.18 CYGNUS LOOP XA ACIS-S NONE 80.00
===================================================================================
Proposal Number: 02500518
Proposal Title: CHANDRA DETAILED SPATIAL STUDY OF THE ``ANOMALOUS'' X--RAY
PULSARS
PI: GIAN LUCA ISRAEL
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose here to observe the sample of AXPs with the Chandra HRC-I in
order to improve their X-ray positions (down to 1'' or better). This level of
positional accuracy is indispensable to identify the optical/IR counterparts of
AXPs in their crowded galactic plane fields. We plan to use the X-ray emission of
known bright K-M spectral type stars within the field of view (FOV) of HRC-I
which are nearby (within a radius of about 15') each AXP. We also will
investigate the presence of extended emission around AXPs: in particular
2E2259+58, AXJ1844-0258 and 1E1841-04 are likely associated with known shell-like
radio emission which will be studied in detail.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
10:50:07.80 -59:53:15.00 1E1048-59 HRC-I NONE 10.00
17:08:47.20 -40:08:50.70 1RXS J1708-4009 HRC-I NONE 10.00
18:44:53.30 -02:56:42.00 AX J1844-02 HRC-I NONE 20.00
===================================================================================
Proposal Number: 02500527
Proposal Title: THE SYNCHROTRON NEBULA IN MSH15-56
PI: PAUL PLUCINSKY
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose a 60ks observation of the synchrotron nebula in the
supernova remnant MSH15-56. MSH15-56 contains the most luminous radio plerionic
synchrotron nebula after the Crab Nebula, indicating the presence of a young
energetic pulsar. We have detected a localized region of non-thermal X-ray
emission with ASCA which overlaps part of the radio nebula. We suggest that this
emission is either the X-ray synchrotron nebula or the interaction region between
the reverse shock and the nebula. The proposed observation will detect a point
source down to a luminosity of 10^31 ergs/s. Since all the known pulsars with a
characteristic age of 10^4 yr are more luminous than this, we will either detect
the young neutron star or set a stringent and interesting upper limit on its
X-ray luminosity.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
15:52:20.00 -56:17:06.00 MSH15-56 ACIS-S NONE 60.00
===================================================================================
Proposal Number: 02500559
Proposal Title: SURVEYING THE AFTERMATH OF A STARQUAKE
PI: DAVID HELFAND
Subject Category: SN, SNR AND ISOLATED NS
Abstract: In January of this year, the Vela pulsar underwent the largest
spin-rate change in the thirty years since timing observations began. We observed
the source twice, ~3.5 and ~35 days after the event, revealing a remarkable
nebular structure surrounding the pulsar, setting strong constraints on pulse
profile changes following the glitch, and finding significant changes in the
nebular emission at roughly the light-travel time from the pulsar a month
following the event. We propose here to obtain a third epoch of pulsar and nebula
observations in order to constrain glitch models by assessing the pulse-shape
stability and exploring further the changes in the nebular structure. As with our
TOO observations, we will waive proprietary rights to these data.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
08:35:20.70 -45:10:35.70 PSR B0833-45 HRC-I NONE 50.00
===================================================================================
Proposal Number: 02500574
Proposal Title: X-RAY IMAGING OF THE NEWBORN REMNANT OF SN1987A
PI: RICHARD MCCRAY
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose to image the young supernova remnant SNR1987A on the ACIS-S3
detector with an observation of 100 ks. This observation will provide an image
with approximately 7000 counts which can be deconvolved in order to resolve the
X-ray morphology. We will also determine the relative contributions of fast
shocks (from the blast wave) and slow shocks (from hotspots in the circumstellar
ring) to the X-ray emission as a function of location in the image by
investigating the spatial dependence of the pulse height spectra. This
observation will provide a statistically reliable baseline which will be used to
assess future changes in both the X-ray morphology and spectrum.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
05:35:28.00 -69:16:11.10 SNR 1987A ACIS-S NONE 100.00
===================================================================================
Proposal Number: 02500555
Proposal Title: CONTINUING CHANDRA OBSERVATIONS OF THE X-RAY SUPERNOVAE SN
1999EM AND SN 1998S
PI: WALTER LEWIN
Subject Category: SN, SNR AND ISOLATED NS
Abstract: SN 1999em and SN 1998S are among the brightest supernovae (SNe) of
their respective subclasses of the past decade. Both were targets of opportunity
for both HST and Chandra. We propose to continue observations of these important
sources. SN 1999em is the closest Type IIP SN and the only one observed in both
radio and X-rays. It is seen to exhibit unusual behavior in both of these regimes
and provides an unprecedented opportunity to determine the nature of this
subclass. SN 1998S is one of the few radio loud Type IIn SN and presents a rare
opportunity to follow this subclass through its optical, radio, and X-ray
evolution. Regular monitoring of these SNe with Chandra will provide new insight
into the structures of their respective circumstellar media and SN ejecta.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
04:41:27.10 -02:51:45.70 SN 1999EM ACIS-S NONE 30.00
04:41:27.10 -02:51:45.70 SN 1999EM ACIS-S NONE 30.00
04:41:27.10 -02:51:45.70 SN 1999EM ACIS-S NONE 30.00
11:46:06.10 +47:28:55.80 SN 1998S ACIS-S NONE 30.00
11:46:06.10 +47:28:55.80 SN 1998S ACIS-S NONE 30.00
===================================================================================
Proposal Number: 02500659
Proposal Title: SEARCH FOR THE BRIGHTEST ISOLATED NEUTRON STARS
PI: ROBERT RUTLEDGE
Subject Category: SN, SNR AND ISOLATED NS
Abstract: The theoretical predictions for the number of detectable INSs in the
ROSAT All-Sky Survey (10^3-10^4) dwarfs the number known, which is seven. Source
confusion in the ROSAT/PSPC error circles has made identification difficult. We
have developed and applied a statistical technique which quantitatively
identifies which X-ray sources have no likely counterparts. We propose short
observations for our best set of RASS Bright-Source Catalog X-ray sources with no
likely counterparts, to obtain sub-arcsec positions, so that we may identify them
optically, or discover new INSs, or perhaps find a new class of high Lx/Lopt
sources.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
02:03:17.50 -24:38:32.00 1RXSJ0203-2438 HRC-S NONE 1.00
02:45:28.90 +26:20:39.00 1RXSJ0245+2620 HRC-S NONE 1.00
11:53:09.70 +54:56:36.00 1RXSJ1153+5456 HRC-S NONE 1.00
12:29:40.60 +18:16:45.00 1RXSJ1229+1816 HRC-S NONE 1.00
13:28:33.10 -36:54:25.00 1RXSJ1328-3654 HRC-S NONE 1.00
14:50:10.60 +65:59:44.00 1RXSJ1450+6559 HRC-S NONE 1.00
14:52:34.90 +32:35:36.00 1RXSJ1452+3235 HRC-S NONE 1.00
16:39:10.70 +56:56:37.00 1RXSJ1639+5656 HRC-S NONE 1.00
===================================================================================
Proposal Number: 02500700
Proposal Title: A STUDY OF THE SOFT GAMMA REPEATER SGR 1627-41 IN QUIESCENCE
PI: CHRYSSA KOUVELIOTOU
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose to image the field of SGR 1627-41 to study the cooling
behaviour of a young neutron star and to potentially distinguish between the
magnetar and accretion models for Soft Gamma Repeaters. Our 50 ks observation
will enable us to: (i) determine the SGR flux and thus confirm whether the source
decays with a constant rate as indicated by earlier observations, (ii)
disentangle the spectrum in its spectral components (possibly BB + power-law),
(iii) search for the neutron star spin period, (iv) determine a precise location
for the SGR within the SNR G337.0-1.0 to get further insights on their
association and the velocity of the ns, and (v) study the environment of the SNR
and in particular the (radio) hot spot for additional X-ray sources.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
16:35:51.80 -47:35:44.00 SGR 1627-41 ACIS-S NONE 50.00
===================================================================================
Proposal Number: 02500707
Proposal Title: THE THERMAL COMPOSITE SNR KES 79
PI: FREDERICK SEWARD
Subject Category: SN, SNR AND ISOLATED NS
Abstract: Kes 79 is a relatively young (3-6 kyr) supernova remnant (SNR) with an
unusual double-shell X-ray structure. The faint outer shell is aligned with the
radio shell, while the bright interior X-rays may form a second shell, although
the data are inconclusive. Kes 79 has been classified as a thermal composite
remnant due to the thermal X-rays in its interior, but it is very unusual in that
an outer shell can also be seen. We propose a 30 ksec ACIS-I observation of Kes
79 to answer these questions about the origin of the interior emission, to map
the outer shell and determine its spectrum, and to determine which if any of the
competing models for thermal composite remnants fit this unusual object. We will
also search for a pulsar with a sensitivity 30 times greater than the existing
limit.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
18:52:39.00 +00:40:00.00 KES 79 ACIS-I NONE 30.00
===================================================================================
Proposal Number: 02500765
Proposal Title: SNR G54.1+0.3: A SNR WITH AN X-RAY JET
PI: FANGJUN LU
Subject Category: SN, SNR AND ISOLATED NS
Abstract: The Crab-like supernova remnant G54.1+0.3 has been recently discovered
to contain an X-ray jet, which makes it a new member of this kind of rare objects
in the Galaxy. We propose herein a Chandra ACIS-S observation, together with our
multi-wavelength programs, to study comprehensively the putative pulsar, the
central nebula, the X-ray jet and its interactions with the surrounding
materials.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
19:30:30.00 +18:52:07.00 SNR G54.1+0.3 ACIS-S NONE 40.00
===================================================================================
Proposal Number: 02500775
Proposal Title: HIGH-RESOLUTION SPECTRAL IMAGING OF THE PLERIONIC CORE OF CTB 80
PI: YVES GALLANT
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose a deep ACIS imaging observation of the plerionic core of SNR
CTB 80, containing PSR B1951+32. Our goals are: 1) to resolve the pulsar from a
probable synchrotron nebula component associated with the radio `hot spot' and to
determine their respective spectra, a task which is only possible with Chandra;
2) to detect or place upper limits on thermal emission from the bow shock
surrounding the plerionic nebula; 3) to determine the temperature of the
protruding `ears' of the core, thought to be the cocoons surrounding twin jets
from the pulsar, and possibly detect these jets directly in X-rays. This
measurement of the velocity of the shocks driven by the jets in a medium of known
density could yield a solid determination of the bulk flow energy in pulsar
jets.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
19:52:58.50 +32:52:45.00 CTB 80 CORE ACIS-S NONE 85.00
===================================================================================
Proposal Number: 02500790
Proposal Title: ACIS IMAGING OF SNR/GAMMA-RAY/YOUNG PULSAR ASSOCIATIONS
PI: ROGER ROMANI
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose ACIS imaging exposures to localize the point sources in two
Gamma-ray error contours. Both have extended X-ray flux with components that are
compact to ASCA resolution. Both have young, energetic pulsars superposed on the
diffuse X-ray emission. The accurate point source locations, coarse maps of the
diffuse emission and spectral constraints that we can extract from these data
will test the apparent associations of these pulsar/gamma-ray source
superpositions. For G312-0.4, we can further probe what appears a striking case
for a pulsar/SNR interaction.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
14:12:08.00 -61:45:29.00 G312.4-0.4 ACIS-I NONE 10.00
18:37:33.00 -06:08:52.00 GEV J1837-0610 ACIS-S NONE 10.00
===================================================================================
Proposal Number: 02500795
Proposal Title: VELA PULSAR: THE HUNT FOR POST-GLITCH EFFECTS
PI: GEORGE PAVLOV
Subject Category: SN, SNR AND ISOLATED NS
Abstract: The Vela pulsar observation with the CXO ACIS, 105 days after the large
glitch of January 16, 2000, shows a striking spatial feature 1.4 arcsec away from
the pulsar. Preliminary spectral analysis shows that this could be a cloud of
relativistic plasma emitting synchrotron radiation. No known instrumental effects
can produce such a structure. This observation needs to be verified to ensure
that this is not a result of a yet unknown instrumental artifact. If confirmed,
it will be the most important discovery made possible by the superb spatial
resolution of Chandra. This proposal is aimed at verifying that the observed
structure is real and measuring its properties to investigate the new glitch
effect. Otherwise this observation will help better understand the properties of
ACIS.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
08:35:20.70 -45:10:36.00 VELA PULSAR ACIS-S NONE 20.00
===================================================================================
Proposal Number: 02500834
Proposal Title: HIGH RESOLUTION X-RAY IMAGING OF SNR 3C 396
PI: STEPHEN REYNOLDS
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose to observe a highly absorbed, compact, radio-bright SNR, 3C
396 (G39.2-0.3), to search for a pulsar, a compact synchrotron nebula, and for
radio-X-ray correlations on the arcsecond scale. The X-ray spectrum shows weak
lines, and may be dominated at higher energies by a pulsar nebula or by
synchrotron emission from shock-accelerated electrons. Chandra's spatial
resolution allows the direct search for a pulsar or compact synchrotron nebula,
and in conjunction with 1.4"-resolution radio images, should allow careful
morphological comparison to test this possibility. Many more SNR-pulsar
associations are expected; there are few enough known that each new one teaches
us new things about pulsars, SNRs, and their interaction.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
19:04:06.00 +05:27:00.00 3C396 (G39.2-0.3) ACIS-S NONE 100.00
===================================================================================
Proposal Number: 02500841
Proposal Title: SEARCHING FOR X-RAYS FROM THE NEWLY DISCOVERED YOUNG PULSAR
J1740+1000
PI: ZAVEN ARZOUMANIAN
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose to observe the newly discovered 154 ms pulsar J1740+1000
with ACIS-S in Continuous Clocking mode. Unless this neutron star, a near twin of
the well-studied X-ray source PSR B0656+14, is highly unusual, our observations
will detect its thermal surface and non-thermal magnetospheric emission. We will
search for pulsations using ephemerides provided by our own radio timing program,
and take advantage of Chandra's sensitivity and resolving power to constrain the
existence of a compact synchrotron nebula powered by the pulsar. Our observations
will also be sensitive to a bow-shock nebula that may be inflated by this
high-velocity pulsar within its local interstellar gas.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
17:40:25.90 +10:00:06.20 PSR J1740+1000 ACIS-S NONE 5.00
17:40:25.90 +10:00:06.20 PSR J1740+1000 ACIS-S NONE 15.00
===================================================================================
Proposal Number: 02500872
Proposal Title: MATURE SUPERNOVA REMNANTS IN THE LARGE MAGELLANIC CLOUD
PI: KAZIMIERZ BORKOWSKI
Subject Category: SN, SNR AND ISOLATED NS
Abstract: Mature (Sedov-phase) supernova remnants (SNRs) offer an excellent
opportunity to study shock physics and SNR/ISM interactions with minimal
interference from ejecta and local ISM modification. However, such remnants are
difficult to observe in the Galaxy. We propose to observe three remnants in the
Large Magellanic Cloud (LMC) likely to be in the Sedov phase. LMC remnants have
low extinction, known distance, and relatively small angular size. Chandra's
spatial resolution will show the differences in the spectra expected near the
shock. We will perform spatially resolved spectroscopy on these objects using our
Sedov models to determine ion and electron temperatures, and ionization timescale
and temperature gradients. This should be a stringent test for the Sedov X-ray
models.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
04:53:40.00 -68:29:45.00 0453-68.5 ACIS-S NONE 40.00
05:33:60.00 -69:55:00.00 0534-69.9 ACIS-S NONE 60.00
05:47:50.00 -70:24:45.00 0548-70.4 ACIS-S NONE 60.00
===================================================================================
Proposal Number: 02500919
Proposal Title: THERMAL AND NONTHERMAL X-RAY EMISSION IN SNR RCW 86
PI: STEPHEN REYNOLDS
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We have shown that ASCA observations of the middle-aged SNR RCW86 are
best understood as a combination of thermal and nonthermal emission, but a unique
decomposition will not be possible without simultaneous spatial and spectral
analysis. Only Chandra has the spatial resolution required to allow separation of
these components. We propose an observation with ACIS-S to image the bright
southwestern part of the remnant. On the basis of our ASCA modeling, we should be
able to construct images in bands dominated by thermal or nonthermal emission.
Our observation should be long enough to perform spatially-resolved spectroscopy
of filamentary X-ray emission. This study should help greatly in future efforts
to separate thermal and nonthermal emission in SNR X-ray spectra.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
14:40:45.00 -62:40:00.00 RCW 86 ACIS-S NONE 100.00
===================================================================================
Proposal Number: 02500880
Proposal Title: COORDINATED CHANDRA/HST OBSERVATIONS OF THE CRAB NEBULA
PI: JEFF HESTER
Subject Category: SN, SNR AND ISOLATED NS
Abstract: Recent monitoring of the Crab Nebula with the HST and Chandra sheds new
light on both the structure and dynamics of the region into which the wind from
the Crab pulsar flows. Bright X-rays predominately originate in regions which
contain sharp and highly dynamic structure at visible wavelengths, reflecting the
short synchrotron lifetime of the most energetic particles in the nebula. We now
have a unique opportunity for an intensive coordinated optical/X-ray campaign to
study this dynamic structure. We have an approved and scheduled HST program to
monitor the Crab at 11-day intervals during 8 months in the 2000-01 observing
season. We request sixteen 25 ks observations with the Chandra ACIS to monitor
the X-ray structure and spectrum of Crab during the HST campaign.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
05:34:31.60 +22:00:56.40 CRAB NEBULA ACIS-S NONE 12.50
05:34:31.60 +22:00:56.40 CRAB NEBULA ACIS-S NONE 12.50
05:34:31.60 +22:00:56.40 CRAB NEBULA ACIS-S NONE 12.50
05:34:31.60 +22:00:56.40 CRAB NEBULA ACIS-S NONE 12.50
05:34:31.60 +22:00:56.40 CRAB NEBULA ACIS-S NONE 12.50
05:34:31.60 +22:00:56.40 CRAB NEBULA ACIS-S NONE 12.50
05:34:31.60 +22:00:56.40 CRAB NEBULA ACIS-S NONE 12.50
05:34:31.60 +22:00:56.40 CRAB NEBULA ACIS-S NONE 12.50
05:34:31.60 +22:00:56.40 CRAB NEBULA ACIS-S NONE 25.00
05:34:31.60 +22:00:56.40 CRAB NEBULA ACIS-S NONE 25.00
05:34:31.60 +22:00:56.40 CRAB NEBULA ACIS-S NONE 25.00
05:34:31.60 +22:00:56.40 CRAB NEBULA ACIS-S NONE 25.00
05:34:31.60 +22:00:56.40 CRAB NEBULA ACIS-S NONE 25.00
05:34:31.60 +22:00:56.40 CRAB NEBULA ACIS-S NONE 25.00
05:34:31.60 +22:00:56.40 CRAB NEBULA ACIS-S NONE 25.00
05:34:31.60 +22:00:56.40 CRAB NEBULA ACIS-S NONE 25.00
===================================================================================
Proposal Number: 02500773
Proposal Title: LET US EXAMINE SOME NEW ISOLATED NEUTRON STARS WITH CHANDRA
PI: HAKKI OGELMAN
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose to observe four pulsars which were detected during the ROSAT
All-Sky-Survey, namely PSRs 1813-36, 1846-06, 0628-28, 1524-39. The SCIENTIFIC
AIM is to investigate a) the morphology of emisison to look for compact nebulae
generated by the pulsar wind-remnant interaction and/or by the acelerated
high-energy electrons, b) the spectroscopy of emission to determine the dominance
of surface or magnetospheric processes. The thermal surface emission depends
strongly on the nuclear EOS at high densities.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
06:30:49.50 -28:34:43.60 PSR0628-28 ACIS-S NONE 20.00
18:17:05.80 -36:18:05.50 PSR1813-36 ACIS-S NONE 30.00
===================================================================================
Proposal Number: 02500821
Proposal Title: LOCALIZATION OF "OPTICALLY-DARK" GAMMA-RAY BURSTS BY CHANDRA AND
HST
PI: GEORGE RICKER
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose Chandra (CXO) observations of 4 GRBs detected by the HETE-2
soft X-ray camera, with contemporaneous observations with HST. These observations
are "relaxed" TOOs, performed 7-16 days after burst detection. To optimize the
chance of isolating Z > 5 GRBs, we will select "dark GRBs" for which no optical
counterpart has been found by ground-based searches within 2 days of GRB onset.
Previous CXO GRB searches have required that observations start within ~24 hours
of burst onset, placing an enormous strain on CXO operations. We have determined
that 30 ks observations made 7-16 days after burst onset will detect sufficient
photons to allow <0.7" localization of the GRB afterglow. We will immediately
place all CXO and HST positions and intensities in the public domain via the
GCN.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
GRB/HETE-SXC #2 ACIS-S NONE 30.00
GRB/HETE-SXC #1 ACIS-S NONE 30.00
===================================================================================
Proposal Number: 02508037
Proposal Title: CHANDRA OBSERVATION OF THE X-RAY AFTERGLOW OF GRB010222, THE
BRIGHTEST GRB OBSERVED BY BEPPOSAX
PI: LUIGI PIRO
Subject Category: SN, SNR AND ISOLATED NS
Abstract: Chandra observations of X-ray afterglows of GRB provide unique results.
The 1 arcsec positional accuracy, high sensitivity to faint sources, combined
with the unprecedented spectral capabilities of this instrument will permit:
1)unique and fast counterpart identification in other wavelenghts, OR a deep
study of the property of the GRB site (host galaxy) to ascertain the nature of
dark GRB (i.e. GRB Without Optical Transient) 2)To study the afterglow spectrum
in its early (bright) and late phases, with the unprecedented potential
capability to detect line spectral features. Both of these goals have been
already demonstrated in our previous observations with CXC (e.g. Piro et al 2000,
Science290,956)
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
14:52:12.55 +43:01:06.26 GRB010222 ACIS-S NONE 30.00
===================================================================================
Proposal Number: 02508045
Proposal Title: TOO OBSERVATIONS OF SGR 1900+14 IN AN ACTIVE STATE
PI: CHRYSSA KOUVELIOTOU
Subject Category: SN, SNR AND ISOLATED NS
Abstract: SGR 1900+14 has just emitted a second giant flare (GCN #1041); this is
the second source, which has emitted giant flares (01/04/18 and 98/08/27), in the
last 20 years. SGR flares are extremenly rare events and release over 10^44 ergs.
The previous flare, changed the pulse shape of the neutron star significantly
(from four peaks to a single peak sinusoid) indicating dramatic B-field changes.
We have evidence (yet unpublished) that the pulse shape is changing back to its
complex form. We wish to investigate and understand: 1) whether there is another
pulse shape change associated with the current SGR activity, 2) whether there is
a persistent flux change and confirm the persistent flux-flare energy output
relation we have seen previously, and 3) whether we confirm a line around 6 keV
seen during a burst emitted two days after the SGR 1900+14 August 27, 1998 flare.
If this is a proton cyclotron line, we will for the first time be able to measure
directly the magnetic field of a magnetar
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
19:07:14.30 +09:19:20.10 SGR 1900 + 14 ACIS-S NONE 5.00
19:07:14.30 +09:19:20.10 SGR 1900 + 14 ACIS-S NONE 5.00
19:07:14.30 +09:19:20.10 SGR 1900 + 14 ACIS-S NONE 20.00
===================================================================================
Proposal Number: 02508046
Proposal Title: IMMEDIATE POST-GIANT FLARE OBSERVATIONS OF SGR 1900+14
PI: SHRINIVAS KULKARNI
Subject Category: SN, SNR AND ISOLATED NS
Abstract: The Soft Gamma-Ray Repeaters (SGRs) are thought to be magnetars:
isolated neutron stars with dipolar magnetic field strengths in excess of 1e14 G.
The best evidence for this identification are the "giant flares" of these
sources, which are highly super-Eddington and require the confining pressure and
reduced photon cross-section of a strong B-field. The 27 August 1998 flare of SGR
1900+14 peaked at L_X > 2e43 erg/s and powered a short-lived synchrotron nebula
of 8.5 GHz flux > 0.3 mJy at its peak. Chandra ACIS-S observations of SGR 1900+14
in the near aftermath of its recent flare (GCN 1041) will enable a search for
spectral features in the post-flare X-ray emission, which may exhibit ~1e37 erg/s
bursts of its own. Strohmayer & Ibrahim (2000) have reported a ~6.4 keV line with
XTE observations of SGR 1900+14; detection of this line with ACIS will provide
valuable insight into these objects. Coordinated observations with the VLA/VLBA
are underway, and will be arranged with RXTE.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
19:07:14.30 +09:19:20.10 SGR 1900+14 ACIS-S NONE 0.00
19:07:14.30 +09:19:20.10 SGR 1900+14 ACIS-S NONE 20.00
===================================================================================
Proposal Number: 02508062
Proposal Title: ARCHIVAL RESEARCH FOR ISOLATED NEUTRON STAR RXJ185635-3754
PI: HARVEY TANANBAUM
Subject Category: SN, SNR AND ISOLATED NS
Abstract: A long LETG observation will provide a high signal-to-noise
high-resolution spectrum, permitting a search for the signatures of heavy
elements (beyond He) in the neutron star atmosphere. If such features can be
detected and identified, their redshift and profiles can be used to provide
constraints on the neutron star equation of state.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
18:56:35.30 -37:54:34.40 RXJ1856.5-3754 HRC-S LETG 9.50
18:56:35.30 -37:54:34.40 RXJ1856.5-3754 HRC-S LETG 100.50
18:56:35.30 -37:54:34.40 RXJ1856.5-3754 HRC-S LETG 170.00
18:56:35.30 -37:54:34.40 RXJ1856.5-3754 HRC-S LETG 170.00
***********************************************************************************
SN, SNR AND ISOLATED NS
--------------------------------------------------
===================================================================================
Proposal Number: 03500538
Proposal Title: A CHANDRA SURVEY FOR COMPACT OBJECTS IN SUPERNOVA REMNANTS
PI: SHRINIVAS KULKARNI
Subject Category: SN, SNR AND ISOLATED NS
Abstract: It has become increasingly clear that the natal properties of young
neutron stars exhibit a rich diversity --- dramatically illustrated by the
enigmatic central object in Cas A and hinted at by early 3D modeling of
core-collapse. We propose a survey of an objectively constructed sample of nearby
SNRs which, when combined with archival data and our vigorous multi-wavelength
observation program, will give us a reliable view of the true variety of neutron
stars. The ensuing statistics and studies of the central objects will advance our
understanding of core-collapse and have bearing on related topics (supernova
energetics, natal kicks, etc). We believe that this comprehensive effort, a
census of such objects within 5 kpc, will be one of the enduring legacies of the
Chandra mission.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
23:59:17.00 +62:26:53.00 G116.9+0.2 ACIS-I NONE 50.00
===================================================================================
Proposal Number: 03500604
Proposal Title: SEARCHING FOR PROTON CYCLOTRON FEATURES IN TWO MAGNETAR
CANDIDATES
PI: LUIGI STELLA
Subject Category: SN, SNR AND ISOLATED NS
Abstract: Soft gamma-ray repeaters, SGRs, and anomalous X-ray pulsars, AXPs,
might contain ``magnetars'', young neutron stars endowed with ultra-high magnetic
fields, which shine as X-ray sources by releasing magnetic energy. Models
involving accretion are not ruled out yet. For the magnetic fields of magnetars,
proton cyclotron features, PCFs, are expected to lie in the X-ray band (E(PCFs) =
0.63 B/(10^{14} G) keV). Model atmosphere calculations predict that PCFs are
conspicuous and relatively broad. We propose here to search for PCFs in the X-ray
spectrum of a SGR (SGR1900+14) and an AXP (1E1048--59), by exploiting the unique
characteristics of the Chandra HETGS and METGS. These observation might provide
decisive evidence in favor of the existence of magnetars.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
10:50:07.80 -59:53:15.00 1E1048-59 ACIS-S HETG 30.00
19:07:16.40 +09:19:44.10 SGR 1900+14 ACIS-S HETG 30.00
===================================================================================
Proposal Number: 03500622
Proposal Title: THE DYNAMICAL PULSAR-WIND NEBULA IN THE VELA SNR
PI: GEORGE PAVLOV
Subject Category: SN, SNR AND ISOLATED NS
Abstract: The Chandra observations have shown the fine structure of the
synchrotron pulsar-wind nebula (PWN) around the Vela pulsar and an appreciable
change of the brightness and spectra of its elements in 7 months between two
ACIS-S observations. To understand the nature of the morphological and spectral
variations, we propose a series of eight logarithmically spaced ACIS-S
observations, 20 ks each, which will allow us to determine the time scale(s) and
the magnitude of the variations, to probe the properties of the relativistic
plasma in the PWN, and to study the interaction of the relativistic pulsar wind
with the ambient medium.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
08:35:20.70 -45:10:36.00 VELA PWN ACIS-S NONE 20.00
08:35:20.70 -45:10:36.00 VELA PWN ACIS-S NONE 20.00
08:35:20.70 -45:10:36.00 VELA PWN ACIS-S NONE 20.00
08:35:20.70 -45:10:36.00 VELA PWN ACIS-S NONE 20.00
08:35:20.70 -45:10:36.00 VELA PWN ACIS-S NONE 20.00
08:35:20.70 -45:10:36.00 VELA PWN ACIS-S NONE 20.00
08:35:20.70 -45:10:36.00 VELA PWN ACIS-S NONE 20.00
08:35:20.70 -45:10:36.00 VELA PWN ACIS-S NONE 20.00
===================================================================================
Proposal Number: 03500712
Proposal Title: BALMER-DOMINATED SHOCKS IN THE CYGNUS LOOP: PROBING
COLLISIONLESS SHOCK PHYSICS
PI: TERRANCE GAETZ
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose ACIS-S3 pointings at the two best-studied Balmer-dominated
shocks in the Cygnus Loop. Abundant optical and UV data are available (including
FUSE pointings). Because of its low extinction, the Cygnus Loop is one of only
five galactic remnants observable in the UV. One Balmer filament is a fast (~350
km/s) collisionless shock, the other a slower (~180 km/s), rapidly decelerating
shock on the verge of becoming radiative. These shocks sample two phases in the
evolution of the shock/wall interaction. Using Chandra's high resolution, we will
extract spectra for narrow regions paralleling the optical shocks to obtain the
postshock variation. This combination of Chandra, optical, and UV data will
greatly constrain models for collisionless shock physical properties and shock
evolution.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
20:54:30.96 +32:17:59.42 CYGNUS LOOP NE2 ACIS-S NONE 60.00
20:56:03.76 +31:57:02.63 CYGNUS LOOP NE1 ACIS-S NONE 60.00
===================================================================================
Proposal Number: 03500721
Proposal Title: LOCALIZATION OF "OPTICALLY-DARK" GAMMA-RAY BURSTS BY CHANDRA AND
HST
PI: GEORGE RICKER
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose Chandra (CXO) observations of 4 GRBs detected by the HETE
soft X-ray camera, with contemporaneous observations with HST. These observations
are "relaxed" TOOs, performed 7-16 days after burst detection. To optimize the
chance of isolating Z > 10 GRBs, we will select "dark GRBs" for which no optical
counterpart has been found by ground-based searches within 2 days of GRB onset.
Previous CXO GRB searches have required that observations start within ~24 hours
of burst onset, placing an enormous strain on CXO operations. We have determined
that 30 ks observations made 7-16 days after burst onset will detect sufficient
photons to allow <0.7" localization of the GRB afterglow. We will immediately
place all CXO and HST positions and intensities in the public domain via the
GCN.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
03:05:27.30 +03:50:16.15 XRF011130 ACIS-I NONE 30.00
15:15:04.10 -19:24:48.50 GRB020531 ACIS-I NONE 10.00
15:15:04.10 -19:24:48.50 GRB020531 ACIS-I NONE 20.00
===================================================================================
Proposal Number: 03500727
Proposal Title: SOFT X-RAY SPECTROSCOPY OF A GAMMA-RAY BURST AFTERGLOW WITH
CHANDRA
PI: FREDERIK PAERELS
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose to observe the afterglow of a bright, high latitude
Gamma-Ray Burst with Chandra/LETGS, for a total of 100 ksec. The key objective of
this observation is the acquisition of the first sensitive soft X-ray emission
spectrum of a GRB afterglow. With it, we will measure the relative abundances of
the alpha-elements with respect to Fe, and directly address the viability of
models that associate GRB's with the core collapse of massive stars.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
13:58:03.10 -31:22:22.00 GRB 020405 ACIS-S LETG 60.00
===================================================================================
Proposal Number: 03500728
Proposal Title: FINE FLUOROSCOPY ON MOLECULAR CLUMPS OVERTAKEN BY SUPERNOVA
BLAST WAVE
PI: YASUNOBU UCHIYAMA
Subject Category: SN, SNR AND ISOLATED NS
Abstract: By ASCA/BeppoSAX observations of the supernova remnant G78.2+2.1 and
IC443, there found three hard X-ray emitting clumps in which efficient electron
acceleration would be taking place at the transmitted shock driven by the
supernova blast wave. We propose Chandra observations of these newly discovered
hard X-ray clumps to uncover the spatial structure of the molecular clumps and to
study the particle acceleration in a dense and turbulent medium.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
20:20:12.00 +40:38:60.00 G78.2+2.1 CLUMP-2 ACIS-I NONE 20.00
20:21:24.00 +40:48:36.00 G78.2+2.1 CLUMP-1 ACIS-I NONE 10.00
===================================================================================
Proposal Number: 03500756
Proposal Title: RICH X-RAY STRUCTURES OF MIXED-MORPHOLOGY SNR W28 IN HARD AND
SOFT EMISSION
PI: JEONGHEE RHO
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose ACIS-S observations of the archetype mixed-morphology SNR
W28, which shows center-filled X-rays within a radio shell. Two evolutionary
scenarios --evaporating clouds and radiative shocks -- are competing to explain
the central X-ray emission. Our studies of W28 show that the plasma conditions
are different from other MM SNRs with an extra high temperature component and
spectral variation across the remnant. The sub arcsec ACIS image will resolve
highly structured X-ray emission of W28 at the center and shells as it is
correlated with the chaotic, knoty optical emission. We are searching for
evidence of cloud interaction in the X-ray band, cosmic ray acceleration sites,
tracers of ejecta material, fate of clouds due to evaporations, and the radiative
X-ray filaments.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
18:00:24.80 -23:25:40.30 W28 ACIS-S NONE 90.00
===================================================================================
Proposal Number: 03500759
Proposal Title: THE TWO SHELLS OF DEM L 316
PI: ROSA WILLIAMS
Subject Category: SN, SNR AND ISOLATED NS
Abstract: The double-lobed system DEML316 is a particularly puzzling object.
Although it is known to be the remnant of one or more supernovae, the precise
nature of the structure remains mysterious. Suggestions to date include (1) the
collision of two supernova remnants (SNRs); (2) a supernova explosion into a
bipolar cavity; or (3) two SNRs superposed along the line of sight. To confirm or
rule out these scenarios, we are proposing observations of this system with
Chandra's ACIS. We will use spatially-resolved spectroscopy to determine where
the hot gas is located within the shells and discover the pattern of temperature
variations across the system. The resolution of this puzzle will add greatly to
our knowledge of the frequency, distribution, and evolution of SNRs.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
05:47:15.00 -69:42:25.00 DEM L 316 ACIS-S NONE 12.40
05:47:15.00 -69:42:25.00 DEM L 316 ACIS-S NONE 40.00
===================================================================================
Proposal Number: 03500783
Proposal Title: SPATIAL AND SPECTRAL STUDIES OF X-RAYS FROM PSR B1823-13 AND ITS
COMPACT NEBULA
PI: SACHIKO TSURUTA
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose to carry out an observation of the Vela-like PSR B1823-13
with Chandra's ACIS-S. The primary goal is to separate the point source from the
surrounding nebula, so that we can conduct spectral analysis. We emphasize that
only Chandra's instruments can clearly eliminate the contamination of the point
source spectrum from the photons originating from the compact nebula. The
comparison of the results thus obtained with neutron star cooling theories will
help us determine the composition of the stellar interior, degree of
superfluidity, the equation of state, and stellar radius. We will also be able to
study the structural and spectral details of the compact nebula surrounding the
pulsar, that will also have direct impact on some of the areas of pulsar
astrophysics.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
18:26:13.17 -13:34:47.20 PSR B1823-13 ACIS-S NONE 40.00
===================================================================================
Proposal Number: 03500831
Proposal Title: THE RAPIDLY EVOLVING YOUNG SUPERNOVA REMNANT, SNR1987A
PI: DAVID BURROWS
Subject Category: SN, SNR AND ISOLATED NS
Abstract: SNR1987A presents a unique opportunity to observe the birth and early
evolution of a supernova remnant at high spatial resolution. The Chandra X-ray
Observatory affords the possibility of monitoring the expansion and evolution of
this remnant with high resolution images and spatially-resolved spectra. This
proposal follows on to our successful Cycle 1 and Cycle 2 observations with a
continued monitoring program. We propose two 50 ks monitoring observations of
SNR1987A in AO3, spaced 6 months apart, to continue the regular monitoring
program that we began in October 1999.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
05:35:28.00 -69:16:11.10 SNR 1987A ACIS-S NONE 50.00
05:35:28.00 -69:16:11.10 SNR 1987A ACIS-S NONE 50.00
===================================================================================
Proposal Number: 03500856
Proposal Title: USING CHANDRA TO UNVEIL THE NATURE OF AN INTRIGUING
PULSAR-SUPERNOVA REMNANT SYSTEM: PSR J1119-6127 AND G292.2-0.5
PI: SAMAR SAFI-HARB
Subject Category: SN, SNR AND ISOLATED NS
Abstract: PSR J1119-6127 is a 1,700 year-old, high magnetic field radio pulsar
(PSR), discovered near the center of the supernova remnant: SNR G292.2-0.5. X-ray
observations revealed a point source ~1.5' from the radio pulsar and ~1' from an
IRAS source, making this system a unique target to better understand the PSR-SNR
association and the way pulsars dump their energy in their surroundings. The poor
statistics of available X-ray data preculdes determining the nature of the
underlying emission mechanism from any part of the remnant. We propose a 60 ksec
ACIS-S observation to image the immediate vicinity of the X-ray source, determine
whether it is an unresolved synchrotron nebula or a precursor LMXB, and get
reliable parameters for the SN explosion.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
11:19:03.40 -61:28:30.00 G292.2-0.5 ACIS-S NONE 60.00
===================================================================================
Proposal Number: 03500270
Proposal Title: BUILDING A BETTER MOUSE-TRAP: X-RAY IMAGING OF G359.23-0.92
PI: BRYAN GAENSLER
Subject Category: SN, SNR AND ISOLATED NS
Abstract: The source G359.23-0.92 ("the Mouse") is a spectacular object, with a
compact radio/X-ray head and a long cometary radio tail. This morphology strongly
suggests that the Mouse is the result of a young high-velocity pulsar interacting
with the ambient medium. We propose an ACIS-S observation of this source, with
the twin aims of detecting the unseen pulsar and imaging its surrounding nebula.
Any young and energetic pulsar thus identified would be an important addition to
the small number of such sources known, while imaging of the nebula presents an
opportunity to study the geometry and morphology of the bow shock produced by the
pulsar's motion.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
17:47:15.80 -29:58:01.00 MOUSE ACIS-S NONE 35.00
===================================================================================
Proposal Number: 03508073
Proposal Title: CHANDRA IDENTIFICATION OF THE X-RAY COUNTERPART OF GRB020127
PI: DEREK FOX
Subject Category: SN, SNR AND ISOLATED NS
Abstract: Roughly one-third of arcminute-scale gamma-ray burst (GRB) error boxes
fail to yield any optical transient in spite of intensive ground-based follow-up
efforts. These so-called "dark GRBs" are likely extinguished in the optical by
dust and gas in their host galaxy: in the one dark GRB identified (in the radio)
so far, GRB970828, modeling efforts indicate an extinction of >10 mags in R-band
(Djorgovski et al. 2001). Such large extinctions are characteristic of molecular
clouds and star-forming regions, and thus shed light on the nature of GRB
progenitors. The 8-arcminute-radius error circle of GRB020127 was reported by the
HETE-II team within 4.5 hours of the burst (GCN 1229), was well-placed for
immediate observations, and was observed from at least two facilities (GCNs 1230,
1234), without identification of a counterpart. Our best hope for counterpart
identification thus lies with the Chandra observations proposed here.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
08:15:07.02 +36:45:25.70 GRB020127 ACIS-I NONE 10.00
08:15:07.02 +36:45:25.70 GRB020127 ACIS-I NONE 10.00
===================================================================================
Proposal Number: 03508074
Proposal Title: AN EARLY OBSERVATION OF A NEARBY SUPERNOVA
PI: ERIC SCHLEGEL
Subject Category: SN, SNR AND ISOLATED NS
Abstract: The X-ray emission of supernovae is a young field with relatively
little data. The possible connection of supernovae with GRBs has been tantalizing
since the occurrence of SN1998bw. The debate over that source continues.
Observations of SN2002ap may go a long way to settling some of the debate. In
addition, the X-ray emission of Type Ic supernova other than SN1998bw is based on
the single detection of SN1994I in M51. X-rays provide information about the
circumstellar ejecta as the out- going shock runs into matter from previous
phases of mass loss. A reverse shock is created which generates low-energy X-rays
(~1 keV) while the outgoing shock generates harder events. The X-rays probe the
circumstellar matter and will provide measures of abundances. The X-ray light
curve provides a measure of the matter distribution. (Ref for SN: Schlegel 1995,
Reports Prog in Physics, 58, 1375)
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
01:36:23.80 +15:45:13.20 SN2002AP ACIS-S NONE 25.00
01:36:23.80 +15:45:13.20 SN2002AP ACIS-S NONE 25.00
01:36:23.80 +15:45:13.20 SN2002AP ACIS-S NONE 25.00
===================================================================================
Proposal Number: 03508075
Proposal Title: LOCALIZATION OF "OPTICALLY-DARK" GAMMA-RAY BURSTS BY CHANDRA
PI: GEORGE RICKER
Subject Category: SN, SNR AND ISOLATED NS
Abstract: Observation will be a second epoch ACIS-I image of the field of a HETE
X-ray rich GRB (XRF011130). The first epoch ACIS-I 30 ksec observation took place
on 10 December. It has been proposed that X-ray rich GRBs may be at redshifts Z >
~10. To date, no X-ray rich GRB counterpart has ever been identified. In the
first epoch observation, ~20 candidates were established. Since the Chandra X-ray
candidates were localized to <1 arcsec accuracy by Chandra, followup imaging by
HST and spectroscopy by ~8 meter-class ground-based telescopes can immediately
take place after the second epoch Chandra data is reduced.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
03:05:24.13 +03:47:54.00 XRF011130 ACIS-I NONE 15.00
===================================================================================
Proposal Number: 03508080
Proposal Title: TOO OBSERVATIONS OF SGR 1900+14 IN AN UNUSUAL ACTIVE STATE
PI: PETER WOODS
Subject Category: SN, SNR AND ISOLATED NS
Abstract: Previously, we have found that the counterpart to SGR 1900+14 underwent
extraordinary spectral changes during burst active episodes in 1998 and 2001. It
is during these epochs where we have gained the most insight into the nature of
this source. SGR 1900+14 recently entered a new phase of activity starting on
2/17. Our ToO observation of the SGR on 2/19 with the RXTE PCA found the flux
(2-10 keV) to be a factor of ~20 higher than expected. The pulsed signal of the
SGR is not seen in the data, nor is the pulsed signal of a nearby Be transient
(XTE J1906+09). There are no other catalogued X-ray transients in the 1 degree
radius FWZM fov of the PCA. The power spectrum did show an excess level of red
noise, similar to that seen in many BHCs. We conclude that we are observing
either (i) the rise of a new transient or (ii) new behavior from SGR 1900+14 in
an active state. A PCA raster scan has shown that the excess emission is
consistent with the direction of the SGR.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
19:07:14.33 +09:19:20.10 SGR 1900+14 ACIS-S NONE 3.00
===================================================================================
Proposal Number: 03508087
Proposal Title: CHANDRA ARCSECOND LOCALIZATION OF THE DARK BURST GRB020321
PI: DEREK FOX
Subject Category: SN, SNR AND ISOLATED NS
Abstract: Roughly 1 in 3 arcminute-scale GRB error boxes fail to yield an optical
transient despite intensive ground-based searches. These "dark bursts" must be
subject to severe optical extinction, either within their host galaxy or because
they are located at z>5. Well-localized dark bursts thus identify highly obscured
star-forming galaxies or galaxies close to the epoch of reionization - objects of
great interest in either case. We propose to localize the dark burst GRB020321
with a single 20-ks Chandra observation. Despite rapid notification and a small
error box (GCNs 1284, 1285), prompt observations have failed to reveal an optical
or radio afterglow of this burst (R<24; GCNs 1289, 1305). Given the 2'-radius
localization we anticipate at most two interloping X-ray sources; comparison with
optical datasets will thus allow a unique identification of the GRB afterglow.
The expected X-ray flux will be extrapolated from BeppoSAX observations to
further cement the source identification.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
16:11:02.40 -83:42:00.00 GRB020321 ACIS-S NONE 20.00
===================================================================================
Proposal Number: 03508095
Proposal Title: SN2001IG: DETECTING A MASS LOSS PHASE?
PI: ERIC SCHLEGEL
Subject Category: SN, SNR AND ISOLATED NS
Abstract: The X-ray emission of supernovae is a young field with relatively
little data. X-rays provide information about the circumstellar ejecta as the
outgoing shock runs into matter from previous phases of mass loss. A reverse
shock is created which generates low-energy X-rays (~1 keV) while the outgoing
shock generates harder events. The X-rays probe the circumstellar matter and are
expected to provide measures of abundances in spectral lines. The X-ray light
curve (LC) additionally provides a measure of the matter distribution (Ref for
SN: Schlegel 1995, Reports on Prog in Physics, 58, 1375). The radio LC of SN1979C
has been interpreted as revealing waves of mass loss (Weiler et al. 1992, ApJ,
399, 672) from the progenitor. No other SN has shown such behavior prior to the
recent increase in the radio LC of SN2001ig. We expect the hard and soft X-rays
to behave differently, directly testing shock/reverse shock theory.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
22:57:30.70 -41:02:25.00 SN2001IG ACIS-S NONE 25.00
22:57:30.70 -41:02:25.00 SN2001IG ACIS-S NONE 25.00
22:57:30.70 -41:02:25.00 SN2001IG ACIS-S NONE 25.00
===================================================================================
Proposal Number: 03508096
Proposal Title: CHANDRA ARCSECOND LOCALIZATION OF THE X-RAY FLASH XRF020427
PI: DEREK FOX
Subject Category: SN, SNR AND ISOLATED NS
Abstract: The X-ray flashes (XRFs) are identified in BeppoSAX observations as
fast X-ray transients that exhibit the properties of gamma-ray burst (GRB) prompt
X-ray counterparts while lacking detectable gamma-ray emission (Heise et al.
2001, astro-ph/0111246). The XRFs are distinguished from Galactic phenomena by
their nonthermal spectra, fast evolution, and near-isotropic sky distribution.
However, the absence of gamma-ray emission means that either (1) the XRFs
originate at very high redshifts, z>5; or (2) the XRFs are a GRB-like phenomenon
with Lorentz factors intermediate to GRBs (L>100) and supernovae (L~1). Chandra,
VLA, and HST observations of XRF011030 established for the first time that, in at
least this case, the XRF was the result of (2) a highly energetic explosion at a
cosmological distance z<3 (GCNs 1136, 1143, 1268). Chandra observations of the
XRF020427 will allow us to identify and study only the second such cosmological
X-ray flash.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
22:09:33.60 -65:19:36.50 XRF020427 ACIS-S NONE 15.00
22:09:33.60 -65:19:36.50 XRF020427 ACIS-S NONE 15.00
===================================================================================
Proposal Number: 03508118
Proposal Title: GRATING OBSERVATION OF GRB020813
PI: GEORGE RICKER
Subject Category: SN, SNR AND ISOLATED NS
Abstract: The SXC on HETE has just localized a very bright (>10 Crab) GRB to an
accuracy of 1 arcmin. Within minutes of the burst location being disseminated, an
optical transient was discovered in the SXC error box. HETE is expected to detect
only 2-3 such events per year with the SXC. Since this burst has some X-ray
characteristics reminescent of GRB011121 (Reeves et al 2002), a grating
observation with Chandra could establish definitively whether hydrogen-like
emission lines from non-iron metals are characteristic of bright GRBs, as is
predicted by the "supranova" model (Vietri and Stella 1999).
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
19:46:41.90 -19:36:05.10 GRB020813 ACIS-S HETG 80.00
===================================================================================
Proposal Number: 03508125
Proposal Title: SPECTROSCOPIC OBSERVATIONS OF THE BRIGHT AFTERGLOW OF GRB021004
PI: FIONA HARRISON
Subject Category: SN, SNR AND ISOLATED NS
Abstract: One of the holy grails of gamma-ray burst research is to detect X-ray
line signatures from an afterglow with high statistical significance. Of all
possible observations, this perhaps offers the best chance of constraining the
GRB mechanism and environment, and could provide the "smoking gun" signature
connecting GRBs to massive stellar deaths. In order to accomplish this, we know
long observations within one day of the event are necessary.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
00:26:54.40 +18:55:43.00 GRB021004 ACIS-S HETG 80.00
===================================================================================
Proposal Number: 03508128
Proposal Title: PROMPT CHANDRA OBSERVATION OF THE TYPE II SN 2002HH
PI: WALTER LEWIN
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose to observe the Type II SN 2002hh. As we have shown, Chandra
data will constrain details of the pre-SN evolution and properties of the SN
ejecta and the circumstellar (cs) matter. In our simulations, we have assumed
1999em-type and 1998S-type spectra, with appropriate distance and absorption. If
02hh is like 99em, a 30 ksec obs can determine the flux to ~25% and the
temperature to ~50%, which would constrain cs interaction models. If 02hh is like
98S, we expect ~0.1 cts/sec. A 30ks obs would give us more counts than the >100ks
spent on 98S, and we would ALSO be able to determine elemental abundances to
~25-40%, which is even better than was done for 98S. This will constrain the
progenitor mass as it did for 98S. The ONLY REASON we wish to not trigger our
200ks A04 TOO is the high extinction to 02hh. If we could use 30ks (and save 170
for another occasion) WE WOULD, but that may not be allowed. A 30ks DDT obs is a
sensible and effective way to seize this rare opportunity.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
20:34:51.20 +60:09:17.50 SN 2002HH ACIS-S NONE 30.00
===================================================================================
Proposal Number: 03508129
Proposal Title: PROMPT CHANDRA OBSERVATION OF THE TYPE IIN SN 2002HI
PI: WALTER LEWIN
Subject Category: SN, SNR AND ISOLATED NS
Abstract: We propose to observe the Type IIn (narrow emission line) SN 2002hi.
Its optical spectra show it is similar to the extremely X-ray luminous SN 1988Z
(IAUC 8006), which was observed at Lx=1e41 erg/s at an age of 6.5yr. It is
unknown what the early-time (first few weeks to months) Lx of such a SN would be.
A simple constant density model of the circumstellar (cs) material around 88Z
predicts an Lx of 1e43 erg/s at an age of a few months with a hard spectrum.
However, the cs interaction is complicated, and this naive model may not hold
(e.g., there could be absorption by the cs gas). It is difficult to make clear
predictions because of the lack of knowledge. A 10ks obs of 02hi (at 260 Mpc)
will reach a sensitivity as low as ~1e40 erg/s. This early obs would be unique
for this interesting and poorly understood class of SNe. Chandra may only see 2-3
SNe like this during its lifetime, and this opportunity should not be missed. In
the future, we will propose for these SNe under Peer Review.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
07:19:54.10 +17:58:18.20 SN 2002HI ACIS-S NONE 10.00
===================================================================================
Proposal Number: 03508130
Proposal Title: THE DECAYING X-RAY AFTERGLOW OF GRB021004
PI: MASAO SAKO
Subject Category: SN, SNR AND ISOLATED NS
Abstract: Observations of the afterglow of GRB021004 have provided us with a
unique opportunity to study the detailed physical conditions of the burst
environment. The optical light curves are densely sampled since ~9.5 minutes
after the burst and consist of multiple bumps and wiggles on various timescales.
The X-ray light curve, however, is sampled only during an earlier Chandra HETG
observation, which lasted ~1 day starting from ~20.5 hours after the burst. The
temporal slope during this observation was determined to be -1.0 +/- 0.2, and
there was no obvious change in spectral shape throughout the observation. As
stressed by Heyl & Perna (astro-ph/021004), the X-ray light curve is particularly
important for distinguishing between the various possible emission models. We
propose to measure the X-ray flux and the spectral shape of GRB021004 during its
late afterglow phases to address the long-term behaviour of this spectacular
afterglow.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
00:26:54.70 +18:55:41.30 GRB021004 ACIS-S NONE 30.00
***********************************************************************************
NORMAL GALAXIES
--------------------------------------------------
===================================================================================
Proposal Number: 02600035
Proposal Title: THE GIANT-OUTBURST SOURCE RXJ1242-1119: IDENTIFICATION OF THE
COUNTERPART
PI: PETER PREDEHL
Subject Category: NORMAL GALAXIES
Abstract: RXJ1242-1119 showed a giant X-ray outburst. The most likely
interpretation is a tidal disruption event that occured in one of the two
non-active galaxies that are located in the X-ray error circle. The Chandra
observation is proposed to identify the counterpart and further constrain the
amplitude of variability.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
12:42:36.90 -11:19:35.00 RXJ1242-1119 ACIS-S NONE 4.00
===================================================================================
Proposal Number: 02600037
Proposal Title: HETG OBSERVATIONS OF THE CENTRAL CLUSTER ELLIPTICAL NGC4696
PI: CLAUDE CANIZARES
Subject Category: NORMAL GALAXIES
Abstract: The elliptical galaxy NGC4696 resides at the center of the Centaurus
cluster of galaxies. Central cD galaxies such as NGC4696 contain a hot, X-ray
emitting ISM at a temperature of roughly 1 keV. Plasmas at this temperature
should be a rich source of bright X-ray emission lines resolvable by the HETG
onboard Chandra. We plan to search for the presence of multiphase gas in the
galaxy as well as study the enrichment history of the gas through line-based
abundance measurements. In addition, a spatial analysis of the 0 order image will
allow us to study the interactions between the central galaxy ISM and the
surrouding cluster cooling flow as well as the spectral and spatial properties of
the cooling flow itself.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
12:48:49.40 -41:18:40.50 NGC4696 ACIS-S HETG 95.00
===================================================================================
Proposal Number: 02600049
Proposal Title: CHANDRA IMAGING OF SGR A* AND THE GALACTIC CENTER
PI: GORDON GARMIRE
Subject Category: NORMAL GALAXIES
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
17:45:40.00 -29:00:28.00 SGR A* ACIS-I NONE 50.00
===================================================================================
Proposal Number: 02600050
Proposal Title: OBSERVE DISTAND X-RAY CLUSTER AC114
PI: GORDON GARMIRE
Subject Category: NORMAL GALAXIES
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
22:58:48.50 -34:48:08.60 AC114 ACIS-S NONE 75.00
===================================================================================
Proposal Number: 02600082
Proposal Title: CHANDRA OBSERVATIONS OF THE ELLIPTICAL GALAXY NGC3923
PI: STEPHEN MURRAY
Subject Category: NORMAL GALAXIES
Abstract: We propose to observe the elliptical galaxy NGC3923 with ACIS-S to
determine the density distribution and temperature of the hot gas within this
early-type galaxy. Based on the observed surface brightness profile and gas
temperature, we can determine the kinematic state of the interstellar medium
(i.e., a cooling flow, partial wind, or strong wind), the abundance of heavy
elements, and the total gravitating mass of the galaxy. Combining this
observation with archival data, we can determine the correlation between X-ray
and blue luminosity for a sample of early type galaxies spanning a wide range of
luminosities.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
11:51:01.70 -28:48:17.20 NGC3923 ACIS-S NONE 20.00
===================================================================================
Proposal Number: 02600091
Proposal Title: CHANDRA OBSERVATIONS OF THE EXTRANUCLEAR SOURCE IN UGC 4305
PI: STEPHEN MURRAY
Subject Category: NORMAL GALAXIES
Abstract: The occurrence of luminous extranuclear X-ray sources in normal
galaxies has become an established but poorly understood phenomenon. Recently
Roberts & Warwick showed that some of these sources have X-ray luminosities
reaching ~10E40 erg s-1, however, their nature is still unknown. We propose to
use ACIS to observe the star-forming galaxy UGC4305 which has a luminous
extranuclear source with an X-ray luminosity of ~10E40 erg s-1 (0.1-2.0keV). This
observation will help us to pinpoint its position and see whether it is extended.
This will allow us to determine whether it is associated with an X-ray binary
embedded in a SNR, as suggested by radio observations. Also comparison with
earlier ROSAT observations will allow us to study its long term variability.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
08:19:29.90 +70:42:18.00 UGC 4305 ACIS-S NONE 5.00
===================================================================================
Proposal Number: 02600093
Proposal Title: HRC MONITORING OF M31
PI: STEPHEN MURRAY
Subject Category: NORMAL GALAXIES
Abstract: During AO1 we monitored 3 degrees of M31 on a monthly basis in a study
of source variability. For AO2 we will continue this program, but with lower
frequency.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
00:40:27.00 +40:40:12.00 M31 - SOUTH 2 HRC-I NONE 1.00
00:40:27.00 +40:40:12.00 M31 - SOUTH 2 HRC-I NONE 1.00
00:42:08.00 +40:55:17.00 M31 - SOUTH 1 HRC-I NONE 1.00
00:42:08.00 +40:55:17.00 M31 - SOUTH 1 HRC-I NONE 1.00
00:42:44.40 +41:16:08.30 M31 - CENTER HRC-I NONE 1.00
00:42:44.40 +41:16:08.30 M31 - CENTER HRC-I NONE 1.00
00:44:07.00 +41:43:16.00 M31 - NORTH 1 HRC-I NONE 1.00
00:44:07.00 +41:43:16.00 M31 - NORTH 1 HRC-I NONE 1.00
00:45:20.00 +41:49:47.00 M31 - NORTH 2 HRC-I NONE 1.00
00:45:20.00 +41:49:47.00 M31 - NORTH 2 HRC-I NONE 1.00
===================================================================================
Proposal Number: 02600094
Proposal Title: M31 NUCLEAR REGION
PI: STEPHEN MURRAY
Subject Category: NORMAL GALAXIES
Abstract: The nucleus of M31 is surprisingly variable and soft. This long
observation, followed by two shorter observations, will probe the variability of
the nucleus on short timescales in order to set a limit to the size of the
emitting region. Within the nuclear region there are several interesting
transients that will also be studied.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
00:42:34.89 +40:57:21.01 M31 NUCLEUS ACIS-I NONE 5.00
00:42:44.40 +41:16:08.30 M31 NUCLEUS ACIS-S NONE 40.00
00:43:08.50 +41:18:20.00 M31 NUCLEUS ACIS-I NONE 5.00
===================================================================================
Proposal Number: 02600095
Proposal Title: INVESTIGATING THE CENTRAL ENGINES OF LINER 2S
PI: STEPHEN MURRAY
Subject Category: NORMAL GALAXIES
Abstract: The presence of broad optical emission lines, indicating the presence
of a LLAGN, in a significant subset of LINER galaxies has led to the expansion of
the Seyfert 1/Seyfert 2 paradigm to LINER systems. However, the fraction of LINER
2 systems actually powered by LLAGN remains uncertain. This is an excellent
problem for Chandra to address, since if a LLAGN (even a highly obscured example)
is present then Chandra has the capabilities to identify it. We therefore propose
an observation of the LINER 2 galaxy NGC 4111, a known X-ray source with a
hitherto ambiguous central engine.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
12:07:03.20 +43:03:55.30 NGC4111 ACIS-S NONE 15.00
===================================================================================
Proposal Number: 02600098
Proposal Title: SUPER-LUMINOUS X-RAY SOURCES IN NEARBY GALAXIES NGC4485/4490
PI: STEPHEN MURRAY
Subject Category: NORMAL GALAXIES
Abstract: The soft X-ray emission of many spiral galaxies has been found to be
dominated by a handful of individual sources within each galaxy. Many of these
sources are sited outside the nuclei of the galaxies in question, and have
remarkably high luminosities (well in excess of 10^38 erg/s). We propose a
Chandra observation of the NGC 4485/4490 interacting pair of galaxies, which are
known to contain at least five of these "super-luminous" X-ray sources, in order
to investigate this phenomena using the unprecedented capabilities of the Chandra
observatory.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
12:30:31.20 +41:38:60.00 NGC 4485/4490 ACIS-S NONE 20.00
===================================================================================
Proposal Number: 02600101
Proposal Title: MONITORING THE M31 NUCLEAR REGION
PI: STEPHEN MURRAY
Subject Category: NORMAL GALAXIES
Abstract: The nuclear region of M31 is surprisingly variable. Several transients
are located nearby. This bi-monthly monitoring will build on the lightcurve
already obtained during AO1.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
00:42:37.50 +40:54:27.00 M31 NUCLEUS ACIS-I NONE 5.00
00:42:40.80 +40:51:54.00 M31 NUCLEUS/TRANS ACIS-S NONE 5.00
00:42:44.40 +41:16:08.30 M31 NUCLEUS ACIS-I NONE 5.00
00:42:44.40 +41:16:08.30 M31 NUCLEUS/TRANS ACIS-I NONE 5.00
00:42:44.40 +41:16:08.30 M31 NUCLEUS/TRANS ACIS-I NONE 5.00
00:43:05.55 +41:17:03.30 M31 NUCLEUS ACIS-I NONE 5.00
===================================================================================
Proposal Number: 02600103
Proposal Title: CHANDRA OBSERVATIONS OF THE ELLIPTICAL GALAXY NGC4594
PI: STEPHEN MURRAY
Subject Category: NORMAL GALAXIES
Abstract: We propose to observe the galaxy NGC4594 with ACIS-S to determine the
properties of the diffuse emission within this galaxy. Presumably, the diffuse
emission arises from hot gas and we will determine its density and temperature
distributions. Based on the observed surface brightness profile and gas
temperature, we can determine the kinematic state of the interstellar medium
(i.e., a cooling flow, partial wind, or strong wind), the abundance of heavy
elements, and the total gravitating mass of the galaxy. In addition, we will
study the source populations in the galaxy.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
12:39:59.00 -11:37:28.00 NGC4594 ACIS-S NONE 20.00
===================================================================================
Proposal Number: 02600102
Proposal Title: CHANDRA OBSERVATIONS OF THE ELLIPTICAL GALAXY NGC3379
PI: STEPHEN MURRAY
Subject Category: NORMAL GALAXIES
Abstract: We propose to observe the elliptical galaxy NGC3379 with ACIS-S to
determine the density distribution and temperature of the hot gas within this
early-type galaxy. Based on the observed surface brightness profile and gas
temperature, we can determine the kinematic state of the interstellar medium
(i.e., a cooling flow, partial wind, or strong wind), the abundance of heavy
elements, and the total gravitating mass of the galaxy. Combining this
observation with archival data, we can determine the correlation between X-ray
and blue luminosity for a sample of early type galaxies spanning a wide range of
luminosities.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
10:47:50.00 +12:34:57.00 NGC3379 ACIS-S NONE 30.00
===================================================================================
Proposal Number: 02600189
Proposal Title: THE "EFFERVESCENT" SPIRAL GALAXY NGC2403
PI: MASSIMO CAPPI
Subject Category: NORMAL GALAXIES
Abstract: We propose Chandra observations of the nearby spiral galaxy NGC 2403.
Deep HI observations have revealed numerous expanding superbubbles in the disk
and an extensive HI halo with large and peculiar kinematics. The HI halo may be
due to a large galactic fountain powered by the vertical expansion of
superbubbles. The aims of this proposal are i) the study of X-ray emission from
the superbubbles and ii) the search for a hot diffuse emission from the halo. In
particular, the presence or absence of a hot counterpart of the HI halo will
contribute new crucial information for understanding the evolution of NGC 2403 in
particular and similar galaxies in general.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
07:36:51.90 +65:36:00.60 NGC2403 ACIS-S NONE 40.00
===================================================================================
Proposal Number: 02600197
Proposal Title: RESOLVING THE X-RAY BINARY POPULATION IN EARLY-TYPE GALAXIES
PI: CRAIG SARAZIN
Subject Category: NORMAL GALAXIES
Abstract: Our Chandra image of NGC4697 resolved this X-ray faint elliptical into
low mass X-ray binaries (LMXBs), plus a small fraction (15%) from ISM gas. New
Chandra observations will spatially resolve the emission from 4 more X-ray faint
early-type galaxies. We will determine the luminosity functions of LMXBs, which
provide direct evidence of the history of massive star formation, and a measure
of the relative numbers of NS and BH binaries. We will detect ~30 supersoft
sources, and ~40 LMXBs in globular clusters. The total X-ray spectra of the
sources and colors for individual sources will be used to constrain models for
LMXBs. The amount, distribution, and X-ray spectrum of any ISM gas emission will
be derived, and the luminosities, temperatures, and abundances compared to X-ray
bright galaxies
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
12:24:27.90 +07:19:04.90 NGC4365 ACIS-S NONE 41.00
12:25:24.20 +18:11:23.40 NGC4382 (M85) ACIS-S NONE 43.00
===================================================================================
Proposal Number: 02600233
Proposal Title: A DEEP SURVEY OF X-RAY SOURCES IN M32, THE NEAREST ELLIPTICAL
GALAXY
PI: ROBERT O'CONNELL
Subject Category: NORMAL GALAXIES
Abstract: M32 is an important benchmark for our understanding of elliptical
galaxies. It is the nearest elliptical, and its constituents can be probed to
luminosities 400 times fainter than in Virgo galaxies. M32 is the best studied
low-luminosity E and is a key to understanding the dependence of stellar X-ray
binary and hot gas emission on E galaxy luminosity. Its massive nuclear black
hole lies in the densest known central stellar system, making M32 a prime test of
ADAF and related models of AGN energetics. We propose a deep ACIS observation of
M32 that takes full advantage of its proximity to investigate its X-ray
constituents to the faintest practical luminosities (1e35 erg/s) with good
spectral information.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
00:42:41.80 +40:51:52.00 M32 ACIS-S NONE 20.00
00:42:41.80 +40:51:52.00 M32 ACIS-S NONE 55.00
===================================================================================
Proposal Number: 02600271
Proposal Title: THE SHOCK IN IC1262
PI: GINEVRA TRINCHIERI
Subject Category: NORMAL GALAXIES
Abstract: High resolution ROSAT data of IC1262 have revealed an unexpected
structure that can be interpreted in the framework of shock-heating of the
intergalactic gas as a result of infall of new material, interaction and/or
merging. The ACIS-S high resolution image will allow a better determination of
the photon distribution on small scales and a measure of (possible) spectral
variations. This will give us the required information to study the detailed
characteristics of the structure and of the ambient medium to better understand
the shock phenomenon. This is probably among the brightest structures of its
kind, and a proper determination of its properties will increase our knowledge of
shocks in groups and their relation with environmental properties.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
17:33:03.00 +43:45:30.00 IC1262 ACIS-S NONE 30.00
===================================================================================
Proposal Number: 02600302
Proposal Title: THE CARTWHEEL'S RING
PI: ANNA WOLTER
Subject Category: NORMAL GALAXIES
Abstract: The Cartwheel is the archetypical ring galaxy, with strong star
formation activity concentrated in a peculiar annular structure. We have chosen
it as the ideal target for studying the starburst phenomenon in a "clean"
environment, uncontaminated by other galactic components. We discovered X-ray
emission from the Southern quadrant of the ring, where the most active HII
regions are, extending to this spectacular galaxy the strong connection between
star formation activity and high energy emission. With CHANDRA we want to address
in detail the issue. Mapping the source morphology with unprecedented spatial
resolution, and for the first time its spectral characteristics, will enable us
to verify the close association with the HII regions, and to establish the true
nature of the emission.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
00:37:40.00 -33:42:58.00 CARTWHEEL ACIS-S NONE 80.00
===================================================================================
Proposal Number: 02600242
Proposal Title: THE HALOS OF POST-MERGER ELLIPTICALS
PI: DAVID DAVIS
Subject Category: NORMAL GALAXIES
Abstract: Studies with ROSAT suggest that post-merger ellipticals may be
underluminous in X-rays. If they lack the extensive hot halos seen in typical
ellipticals then this is a serious problem for the merger hypothesis. We propose
to study the structure of the halos in four post-merger ellipticals with ACIS-S,
to search for halo truncation and test the idea that halos are rebuilt after a
merger by gas falling back from tidal tails. We will derive a new estimate of the
post-merger age from the central cooling time, and study the metallicity
distribution. Our results will be compared to those for normal, old ellipticals.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
09:23:30.70 -23:09:48.20 NGC 2865 ACIS-S NONE 30.00
===================================================================================
Proposal Number: 02600286
Proposal Title: ORIGIN OF THE HARD EMISSION IN THE OPTICALLY INACTIVE E GALAXY
IC4296 FROM HIGH RESOLUTION X-RAY AND RADIO OBSERVATIONS
PI: SILVIA PELLEGRINI
Subject Category: NORMAL GALAXIES
Abstract: Recent Chandra surveys discovered a number of strong hard X-ray sources
associated with otherwise ``normal'' early-type galaxies. An excellent test case
to study this phenomenon is represented by the giant elliptical IC4296, for which
we propose a 25 ksec ACIS-S observation. In fact previous ASCA and BeppoSAX
observations of this galaxy reveal an excess of hard X-ray emission that could be
due to a low luminosity active nucleus. Optical spectroscopy however does not
reveal any sign of nuclear activity. A Chandra ACIS-S pointing would establish 1)
whether the excess of hard X-ray emission is nuclear, and 2) what is its spectral
shape, providing fundamental clues to its origin. Further contraints will come
from VLBI and VLBA observations recently conducted or planned.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
13:36:39.37 -33:57:59.50 IC4296 ACIS-S NONE 25.00
13:36:39.37 -33:57:59.50 IC4296 ACIS-S NONE 25.00
===================================================================================
Proposal Number: 02600343
Proposal Title: THE X-RAY STRUCTURE OF THE ARCHETYPAL MERGER NGC 1316
PI: DONG-WOO KIM
Subject Category: NORMAL GALAXIES
Abstract: We propose a 30 ks Chandra ACIS observation of the archetypal merger
galaxy NGC 1316. NGC 1316 shows many signs of recent dynamical activity including
tidal tails and prominent dust lanes. It also contains signs of nuclear activity
including a sub-arcmin scale radio jet and extended radio lobes. With the
proposed observation, we will be able to confirm interesting, but inconclusive
X-ray signatures suggested by the ROSAT data. These include: (1) confirm the
central X-ray morphology including double peaks and valleys, (2) unambiguously
determine the spectral parameters to measure amount and physical characteristics
of hot ISM, (3) study the interaction between radio jets and hot ISM, and (4)
compare in detail the distribution of the cold/warm ISM with that of the hot
ISM.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
03:22:41.70 -37:12:29.00 NGC 1316 ACIS-S NONE 30.00
===================================================================================
Proposal Number: 02600453
Proposal Title: THE GIANT EXTRAGALACTIC STAR-FORMING REGION NGC 604
PI: FRANCESCO DAMIANI
Subject Category: NORMAL GALAXIES
Abstract: We propose a 100 ksec ACIS-I observation of NGC 604, a giant star
forming region in M33. Existing HST data have allowed to detect a large number of
young massive stars in this region, and have also shown that star formation has
occurred not only in recent times. NGC 604 is also a strong X-ray source, but the
origin of its X-ray emission is not clear yet. The combination of high
sensitivity, high spatial resolution and CCD spectral resolution of ACIS-I will
enable to discriminate between various possible origins of the observed X-ray
emission. We discuss different scenarios that may take place, and how the
proposed Chandra observation would advance our knowledge about this region in
particular, and more generally about stellar formation and interaction of stars
with the surrounding medium.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
01:34:32.90 +30:47:04.00 NGC 604 ACIS-I NONE 100.00
===================================================================================
Proposal Number: 02600462
Proposal Title: THE X-RAY STRUCTURE OF OLD, FOSSIL GALAXY GROUPS
PI: LAURENCE JONES
Subject Category: NORMAL GALAXIES
Abstract: A class of `fossil' groups has been discovered. Most L* galaxies in
these groups have merged into a normal, relaxed, giant elliptical galaxy. Fossil
groups thus appear to be very old. They represent an end-point of galaxy merging
and may be the evolutionary link between compact groups and giant elliptical
galaxies. We propose an ACIS study of these old groups to (a) study the
environment of giant elliptical formation and (b) to understand their unusual
properties: a very high X-ray luminosity for their temperature, and a remarkably
elongated X-ray surface brightness, indicative of a very anisotropic dark matter
distribution. These properties have important implications for the impact of
preheating at early epochs and the formation of structures within dark matter
filaments.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
14:16:27.10 +23:15:34.60 RXJ1416.4+2315 ACIS-S NONE 15.00
===================================================================================
Proposal Number: 02600517
Proposal Title: X-RAY OBSERVATIONS OF EDGE-ON DISK GALAXIES WITH RADIO HALOS
PI: Q. DANIEL WANG
Subject Category: NORMAL GALAXIES
Abstract: We propose Chandra ACIS observations of two nearby edge-on galaxies,
NGC3556 (M108) and NGC5775, which show extended radio halos and are located at
high Galactic latitudes. The spatially resolved X-ray spectroscopy of these
observations will enable us to study the content, morphology, and ionization
status of extraplanar hot gas as well as its role in both balancing the energy
input from supernovae and shaping the galactic vertical structures. While NGC5775
is interacting with a companion, NGC3556 is an isolated galaxy. The observations
will thus allow for comparison of the relative importance of galaxy-galaxy
interaction and internal galactic activity in generating extraplanar hot gas.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
11:11:31.30 +55:40:28.00 NGC 3556 ACIS-S NONE 60.00
===================================================================================
Proposal Number: 02600539
Proposal Title: PROBING THE NATURE OF SUPER-LUMINOUS X-RAY SOURCES IN NEARBY
GALAXIES
PI: TIMOTHY ROBERTS
Subject Category: NORMAL GALAXIES
Abstract: We propose Chandra ACIS-S observations of a number of super-luminous
(L$_{\rm X} > 10^{39} \rm ~erg~s^{-1}$) extra-nuclear X-ray sources seen in
nearby galaxies. Though the existence of such sources has long been recognized,
their nature remains very uncertain. The superb imaging capabilities of Chandra
will reveal whether these are truly point-like objects, groups of discrete
sources or predominantly diffuse emission. The observations will also provide
high quality CCD spectroscopy and astrometry as well as testing for gross
temporal variability. This programme will reveal whether the X-ray luminosity is
derived from accreting black holes, recent supernovae, complexes of sources or,
perhaps, an entirely new class of astrophysical object.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
12:35:52.00 +27:56:01.00 NGC 4559 X-1 ACIS-S NONE 10.00
12:35:52.00 +27:56:01.00 NGC 4559 X-1 ACIS-S NONE 10.00
13:29:39.20 +58:25:01.00 NGC 5204 X-1 ACIS-S NONE 10.00
13:29:39.20 +58:25:01.00 NGC 5204 X-1 ACIS-S NONE 10.00
===================================================================================
Proposal Number: 02600546
Proposal Title: STARBURST-DRIVEN OUTFLOWS AND THE EVOLUTION OF DWARF GALAXIES
PI: TIMOTHY HECKMAN
Subject Category: NORMAL GALAXIES
Abstract: Dwarf galaxies are ideal systems for studying the effects of the
feedback of energy and metals into the ISM and IGM from star-formation. X-ray
data are vital to study this process, as they probe the hot gas that contains the
bulk of the energy and metals that may escape the galaxy in a starburst-driven
outflow. We propose a program that will create a well-observed sample of the five
brightest starbursting dwarf galaxies. We are also obtaining FUSE far-UV spectra
of cooler coronal phase gas (10^5 < T(K) < 10^6) and high-quality XMM-Newton
spectra of this sample. The combination of Chandra, XMM, and FUSE data will
provide detailed insight into the thermal, dynamical, and chemical properties of
the diffuse hot gas (and thus elucidate its origin and fate).
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
12:15:38.70 +36:19:41.90 NGC 4214 ACIS-S NONE 30.00
12:28:12.00 +44:05:41.00 NGC 4449 ACIS-S NONE 30.00
13:39:56.00 -31:38:24.40 NGC 5253 ACIS-S NONE 60.00
===================================================================================
Proposal Number: 02600550
Proposal Title: THE X-RAY PROPERTIES OF ULTRALUMINOUS GALAXIES: COSMOLOGICAL
IMPLICATIONS
PI: TIMOTHY HECKMAN
Subject Category: NORMAL GALAXIES
Abstract: Ultraluminous infrared galaxies (ULIRGs) are local laboratories to
investigate the formation of elliptical galaxies and quasars, the enrichment and
heating of the intergalactic medium (IGM), and the nature of optically-faint
X-ray sources and high-z sub-mm sources. X-ray data are essential to address two
major topics: 1) What is the impact of the mechanical energy supplied by the
ULIRG on the ISM of its galaxy and the IGM? 2) What energetic role do
dust-shrouded AGN play in ULIRGs? Previous X-ray observatories lacked the
sensitivity and spectro-spatial resolution to settle these issues. The superb
spatial resolution of the Chandra images will ideally complement our XMM-Newton
spectra, and will create a well-observed sample of the eight nearest and
brightest ULIRGs.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
05:21:01.40 -25:21:44.90 IRAS 05189-2524 ACIS-S NONE 15.00
05:21:01.40 -25:21:44.90 IRAS 05189-2524 ACIS-S NONE 20.00
09:35:51.70 +61:21:11.30 UGC 05101 ACIS-S NONE 50.00
17:23:21.90 -00:17:00.40 IRAS 17208-0014 ACIS-S NONE 50.00
20:58:26.90 -42:39:06.20 IRAS 20551-4250 ACIS-S NONE 50.00
23:15:47.00 -59:03:16.90 IRAS 23128-5919 ACIS-S NONE 50.00
===================================================================================
Proposal Number: 02600564
Proposal Title: STARBURST-NUCLEUS OUTFLOW CONES: UNDERSTANDING THE ORIGIN OF
X-RAY EMISSION IN GALACTIC SUPERWINDS
PI: DAVID STRICKLAND
Subject Category: NORMAL GALAXIES
Abstract: Indirect evidence strongly suggests that starburst-driven outflows
(Superwinds) are responsible for much of the enrichment and heating of the IGM.
X-ray observations of local superwinds provide a direct way of measuring this
process in action, provided these observations probe the energetic metal-enriched
wind-fluid driving the outflow. Our AO1 Chandra observation of the local
starburst NGC 253 shows instead the X-ray emission arises in shocked ambient ISM
(not the wind), but with only one example we can not draw general conclusions.
Only Chandra has the spatial resolution necessary to solve this problem. We
propose Chandra observations of several nearby bright starbursts, to build a
sample large enough to definitively resolve the origin of the X-ray emission in
superwinds.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
10:01:57.80 +55:40:47.10 NGC 3079 ACIS-S NONE 30.00
11:20:17.00 +13:35:20.10 NGC 3628 ACIS-S NONE 60.00
===================================================================================
Proposal Number: 02600578
Proposal Title: THE VERY FAINTEST X-RAY FAINT EARLY-TYPE GALAXIES
PI: JIMMY IRWIN
Subject Category: NORMAL GALAXIES
Abstract: We propose Chandra observations of two very X-ray faint early-type
galaxies (NGC3115 and NGC4526) whose X-ray emission is suspected to be nearly all
stellar (LMXB) in nature. The L_X/L_B ratios of these galaxies are considerably
lower than that of NGC~4697 and the bulge of M31, two early-type systems whose
X-ray emission is known to be primarily stellar. This indicates a radically
different luminosity distribution function for LMXBs in these systems, which is
surprising considering the uniformity of stellar populations in early-type
systems. We will resolve the LMXBs in these galaxies in order to discover why
these galaxies are producing significantly fewer and/or less luminous LMXBs. We
will also search for supersoft sources and derive the temperature of any hot gas
in these systems.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
10:05:13.80 -07:43:09.00 NGC3115 ACIS-S NONE 36.00
===================================================================================
Proposal Number: 02600699
Proposal Title: VERY ISOLATED ELLIPTICAL GALAXIES: MERGER REMNANTS?
PI: JOHN STOCKE
Subject Category: NORMAL GALAXIES
Abstract: Surprisingly, very isolated elliptical galaxies exist! Recent
theoretical and observational evidence suggests that very isolated Es are the
end-product of mergers in compact groups of galaxies. Specifically, the
luminosity function for isolated Es has a significant excess of bright galaxies
(some with cD-like luminosities: $\geq$2mag brighter than L$^*$) and one isolated
E has a detected X-ray halo comparable to that of an entire group of galaxies.
But other scenarios are possible for this one example, so we propose to test the
merger hypothesis for isolated Es with {\bf CHANDRA} + ACIS-S by observing 4 very
isolated E galaxies with cD-like optical luminosities, and thus test the merger
hypothesis for the formation of elliptical galaxies in general.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
08:45:40.56 +07:26:28.10 KI 284 ACIS-S NONE 10.00
08:45:40.56 +07:26:28.10 Discarded ACIS-S NONE 5.00
===================================================================================
Proposal Number: 02600706
Proposal Title: THE EVOLUTION OF GAS EJECTION FROM MERGING GALAXIES
PI: ANDREW READ
Subject Category: NORMAL GALAXIES
Abstract: Galaxy merging is now widely believed to be an essential part of the
process of galaxy formation. Gas loss powered by starbursts triggered during this
process, can have a profound effect on the subsequent evolution of galaxies and
of the surrounding intergalactic medium. An understanding of the processes by
which such winds are triggered, and an estimate of the mass, metal and energy
loss which results, can only be achieved by combining the capabilities of the two
great X-ray observatories: Chandra and XMM. We propose a detailed study of an
evolutionary sequence of four systems for which we already have approved XMM
time, to resolve the structure and origin of merger-induced winds, as well as the
galaxy source populations associated with giant starbursts.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
10:49:52.50 +32:59:06.00 ARP 270 ACIS-S NONE 20.00
12:46:12.20 +30:43:37.00 ARP 242 ACIS-S NONE 30.00
13:38:17.70 +48:16:34.00 MARKARIAN 266 ACIS-S NONE 20.00
23:39:54.20 -12:17:31.00 ARP 222 ACIS-S NONE 20.00
===================================================================================
Proposal Number: 02600733
Proposal Title: 2001: A SPACE CENSUS -- SUPERSOFT X-RAY SOURCES AND OTHER X-RAY
SOURCES IN M31
PI: ROSANNE DI STEFANO
Subject Category: NORMAL GALAXIES
Abstract: We propose ACIS-S observations to carry out a deep census of X-ray
sources in 3 regions of M31. The fields sample young and old stellar populations,
as well as 30-40 globular clusters; they include 5 known luminous supersoft X-ray
sources (SSSs). We will study known X-ray sources and will discover several
hundred new sources, including 20-50 SSSs. We will (1) probe the environmental
dependence of X-ray binary populations, (2) quantify the contribution of M31's
X-ray sources (SSSs and the soft components of other sources) to high-state
ionization of the ISM and IGM, and (3) investigate the X-ray properties of M31's
globular clusters, including variations of flux and spectra with distance from
the cluster cores. This work provides a basis for studies of more distant
galaxies.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
00:38:36.50 +40:17:20.00 M31_1 ACIS-S NONE 15.00
00:38:36.50 +40:17:20.00 M31_1 ACIS-S NONE 15.00
00:38:36.50 +40:17:20.00 M31_1 ACIS-S NONE 15.00
00:41:49.90 +40:59:20.00 M31_2 ACIS-S NONE 15.00
00:41:49.90 +40:59:20.00 M31_2 ACIS-S NONE 15.00
00:41:49.90 +40:59:20.00 M31_2 ACIS-S NONE 15.00
00:46:16.70 +41:40:55.00 M31_3 ACIS-S NONE 15.00
00:46:16.70 +41:40:55.00 M31_3 ACIS-S NONE 15.00
00:46:16.70 +41:40:55.00 M31_3 ACIS-S NONE 15.00
===================================================================================
Proposal Number: 02600758
Proposal Title: THE X-RAY POINT SOURCE POPULATION IN SPIRAL GALAXIES
PI: ANDREA PRESTWICH
Subject Category: NORMAL GALAXIES
Abstract: Emission from discrete sources dominates the X-ray luminosity in spiral
galaxies. We propose to survey a sample of nearby spiral galaxies to characterise
the properties of the discrete sources. We have chosen nearby, face-on galaxies
which span the Hubble sequence for spirals. Chandra's superb imaging capability
will allow us to detect sources down to a luminosity of 4e36 erg s^-1 in the
ROSAT band. We aim to classify souces as accretion powered binaries (Low or High
Mass) or supernova remnants. Our survey will go more than a factor of 20 deeper
than the deepest ROSAT pointings of the same galaxies. This data will enable us
to look for trends in the characteristics of discrete sources with Hubble type,
metallicity and stellar population.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
00:52:04.60 +47:33:04.00 NGC 278 ACIS-S NONE 40.00
00:52:04.60 +47:33:04.00 NGC 278 ACIS-S NONE 40.00
01:36:41.70 +15:46:59.00 NGC 628 ACIS-S NONE 47.00
01:36:41.70 +15:46:59.00 NGC 628 ACIS-S NONE 47.00
03:17:18.30 -41:06:28.00 NGC 1291 ACIS-S NONE 35.00
08:53:32.80 +51:18:50.00 NGC 2681 ACIS-S NONE 85.00
08:53:32.80 +51:18:50.00 NGC 2681 ACIS-S NONE 85.00
12:22:32.00 +29:53:43.00 NGC 4314 ACIS-S NONE 18.00
12:22:32.00 +29:53:43.00 NGC 4314 ACIS-S NONE 18.00
13:37:00.80 -29:51:59.00 NGC 5236 ACIS-S NONE 10.00
14:03:12.50 +54:20:55.00 NGC 5457 ACIS-S NONE 10.00
23:34:27.40 -36:06:05.00 IC 5332 ACIS-S NONE 56.00
23:34:27.40 -36:06:05.00 IC 5332 ACIS-S NONE 56.00
===================================================================================
Proposal Number: 02600824
Proposal Title: CHANDRA OBSERVATIONS OF A DIFFERENT CLASS OF ELLIPTICAL GALAXIES
PI: ANN ZABLUDOFF
Subject Category: NORMAL GALAXIES
Abstract: Recent HST results suggest that elliptical galaxies can be divided into
two classes: those with steeply rising stellar density profiles within the
central kpc (`power law' galaxies) and those with flattened cores (`core'
galaxies). Only one `power law' galaxy is scheduled to be observed with Chandra .
By obtaining imaging of three nearby ``power law'' galaxies, a sample more
representative of most ellipticals than the current target list, we will address
whether 1) the gas traces the potential as defined by the stars in `power law'
ellipticals, 2) there is X-ray evidence that black holes are responsible for the
flattened cores of some bright ellipticals, and 3) X-ray binaries contribute
substantially to the X-ray flux of `power law' and `core' galaxies.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
12:42:02.40 +11:38:45.10 NGC 4621 ACIS-S NONE 25.00
===================================================================================
Proposal Number: 02600844
Proposal Title: YOUNG ELLIPTICAL GALAXIES AND THE EVOLUTION OF THE HOT
INTERSTELLAR MEDIUM
PI: THOMAS STATLER
Subject Category: NORMAL GALAXIES
Abstract: How the hot interstellar medium in elliptical galaxies should evolve
with time is extremely model dependent. On few-Gyr timescales, the diffuse X-ray
emission may grow brighter or fainter, larger or smaller, softer or harder,
depending on the competition between heating, cooling, gravity, and environmental
effects. We will study the time evolution of the hot ISM empirically by observing
a sample of young ellipticals with ACIS-S. The sample defines an age sequence at
the same optical luminosity and environment. We will obtain accurate X-ray
surface brightness profiles, derive radial profiles of gas density, temperature,
and metallicity within the optical radii, and search for substructure related to
inhomogeneous gas flows, tidal debris, and interactions with neighboring
systems.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
04:56:56.30 -04:51:52.00 NGC 1700 ACIS-S NONE 46.00
13:13:01.00 -19:31:05.00 NGC 5018 ACIS-S NONE 32.00
===================================================================================
Proposal Number: 02600891
Proposal Title: ELLIPTICALS WITH DISCREPANT GASEOUS & STELLAR METALLICITIES
PI: RAYMOND WHITE III
Subject Category: NORMAL GALAXIES
Abstract: We propose to observe two elliptical galaxies containing hot gas which
were found to have very low metal abundances (<0.1 solar) in previous ROSAT and
ASCA analyses. The stellar metallicities of these two ellipticals are normal,
being 1-2 times solar at their centers, or ten times greater than the gaseous
abundances. Chandra ACIS observations will allow us to determine whether the
gaseous abundances are really this low and provide a spatially resolved
comparison between gaseous and stellar metallicities.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
12:08:05.60 +65:10:29.00 NGC 4125 ACIS-S NONE 65.00
12:35:39.80 +12:33:23.00 NGC 4552 ACIS-S NONE 55.00
===================================================================================
Proposal Number: 02600916
Proposal Title: IN SEARCH OF ``NORMAL'' ELLIPTICAL GALAXIES
PI: WILLIAM FORMAN
Subject Category: NORMAL GALAXIES
Abstract: For ellipticals at the centers of groups or clusters, it is not
possible to observe the galaxy potential or the abundances and temperature
structure of the gas in the galaxy independently from the surrounding ICM.
However by observing ellipticals of similar optical magnitudes in shallow
potentials of poor groups, we can determine the X-ray properties of ``normal''
ellipticals. ACIS observations of two pairs of ellipticals -- NGC 7619/NGC 7626
and NGC 3607/NGC 3608 will map the temperature, density and heavy elements in
their hot gas and determine the mass distribution in their halos. By comparing
these galaxies with each other, and with others in denser environments, we can
determine the characteristics of normal ellipticals and how these properties are
affected by their environments.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
11:16:57.60 +18:06:36.00 NGC 3607/NGC 3608 ACIS-I NONE 37.00
23:20:21.60 +08:10:30.00 NGC7619/NGC7626 ACIS-I NONE 27.00
===================================================================================
Proposal Number: 02600930
Proposal Title: STELLAR FEEDBACK AND THE EVOLUTION OF DWARF GALAXIES
PI: CRYSTAL MARTIN
Subject Category: NORMAL GALAXIES
Abstract: Dwarf galaxies play an important role in hierarchical models of galaxy
assembly. Starburst-driven winds strongly influence their evolution by regulating
the star formation rate, transporting metal-enriched gas into the intergalactic
medium, and possibly altering galactic halo structure. The hot phase of the wind
is difficult to distinguish from other emission components due to the small size
of dwarf galaxies, so CXO observations can make an enormous impact on this field.
We request CXO observations of five nearby dwarf galaxies with ACIS-S3. These
data will more than double the number of dwarf galaxies with spatially resolved
emission components. We have selected X-ray bright galaxies with starburst
activity and compiled a multi-wavelength database to support the data analysis.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
08:36:15.15 -26:24:34.00 HE 2-10 ACIS-S NONE 20.00
10:03:21.00 +68:44:02.00 NGC 3077 ACIS-S NONE 60.00
===================================================================================
Proposal Number: 02600556
Proposal Title: GALACTIC WINDS AND COOLING FLOWS IN ELLIPTICAL GALAXIES
PI: JOEL BREGMAN
Subject Category: NORMAL GALAXIES
Abstract: The standard cooling flow picture for ellipticals fails to explain
existing observations, especially for the less massive galaxies, which can be
X-ray faint and probably have galactic winds. We can determine the importance of
galactic winds and cooling flows by comparing the stellar mass loss rate, the hot
gas cooling rate determined from low temperature X-ray lines, and the cooling
rate from the L_x and T_x. For the latter measure, only Chandra can separate the
gaseous emission from the X-ray point sources. We propose observations of the low
L_x/L_B galaxies in a complete sample of 24 elliptical galaxies, for which the
high L_x/L_B are already accepted targets. Analysis of this unbiased sample will
determine the prevalence of cooling flows or galactic winds in elliptical
galaxies.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
04:15:45.00 -55:35:31.00 NGC 1549 ACIS-S NONE 37.00
11:13:16.80 -26:45:21.00 NGC 3585 ACIS-S NONE 36.00
12:31:23.50 +25:46:32.00 NGC 4494 ACIS-S NONE 25.00
***********************************************************************************
ACTIVE GALAXIES AND QUASARS
--------------------------------------------------
===================================================================================
Proposal Number: 02700020
Proposal Title: A CLUSTER AROUND 3C294
PI: ANDREW FABIAN
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: ROSAT data indicate that the powerful radio galaxy 3C294 lies in
extended X-ray emission, most probably a cluster, which will be spatially and
spectrally studied by Chandra ACIS-S imaging.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
14:06:44.10 +34:11:24.00 3C294 ACIS-S NONE 20.00
===================================================================================
Proposal Number: 02700029
Proposal Title: SOFT X-RAY ABSORPTION IN NGC 4593
PI: ALBERT BRINKMAN
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We plan to study the soft X-ray absorption in the Seyfert 1 galaxy NGC
4593 by studying the absorption features of highly ionized species.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
12:39:39.50 -05:20:39.50 NGC 4593 HRC-S LETG 120.00
===================================================================================
Proposal Number: 02700032
Proposal Title: THE EXCEPTIONAL X-RAY PROPERTIES OF THE ULIRG NGC 6240
PI: PETER PREDEHL
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: Investigation of the exceptional X-ray properties of the Ultra-luminous
infrared galaxy NGC 6240.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
16:52:58.90 +02:24:03.40 NGC 6240 ACIS-S NONE 40.00
===================================================================================
Proposal Number: 02700033
Proposal Title: NGC 3227: PROPERTIES OF THE WARM ABSORBER
PI: PETER PREDEHL
Subject Category: ACTIVE GALAXIES AND QUASARS
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
10:23:30.60 +19:51:54.00 NGC 3227 HRC-S LETG 100.00
===================================================================================
Proposal Number: 02700016
Proposal Title: SCATTERED EMISSION FROM THE SEYFERT 2 GALAXY IC2560
PI: ANDREW FABIAN
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: ACIS-S observations will resolve the extended X-ray emission scattered
from the obscured nucleus of IC2560, a nearby Seyfert 2 galaxy.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
10:16:19.20 -33:33:53.00 IC2560 ACIS-S NONE 10.00
===================================================================================
Proposal Number: 02700015
Proposal Title: THE NATURE OF THE EXTENDED X-RAY EMISSION AROUND THE QUASAR
3C281
PI: ANDREW FABIAN
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: ACIS-S observations will resolve the extended X-ray emission around the
radio quasar 3C281, seen in ROSAT images. A spectral and spatial study will be
made.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
13:07:54.00 +06:42:14.00 3C281 ACIS-S NONE 17.00
===================================================================================
Proposal Number: 02700034
Proposal Title: SEARCH FOR AN IONIZED ACCRETION DISK IN THE AGN 1ES1927+654
PI: PETER PREDEHL
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: 1ES1927+654 offers a unique possibility to progress in solving some of
the diverse problems posed by the Seyfert phenomenon: 1. Is the accretion disk
ionized ?, 2. Constrain the radial ionization profile of an accretion disk.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
19:27:20.20 +65:33:51.20 1ES1927+654 HRC-S LETG 60.00
===================================================================================
Proposal Number: 02700018
Proposal Title: THE NATURE OF THE X-RAY EMISSION FROM THE RADIO QUASAR 3C9
PI: ANDREW FABIAN
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: Optical and infrared data show that 3C9 has extensive emission line
nebulosity. ACIS-S observations will test whether this is associated with
extended X-ray emission.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
00:20:25.20 +15:40:53.00 3C9 ACIS-S NONE 20.00
===================================================================================
Proposal Number: 02700019
Proposal Title: THE NATURE OF THE X-RAY EMISSION FROM THE RADIO SOURCE 0902+343
PI: ANDREW FABIAN
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: ROSAT indicates that the z=3.4 radio source 0902+343 is also an X-ray
source. ACIS-S observations will test whether this emission is extended.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
09:05:30.10 +34:07:57.00 0902+343 ACIS-S NONE 10.00
===================================================================================
Proposal Number: 02700048
Proposal Title: HETG OBSERVATIONS OF SEYFERT GALAXIES AND A QUASAR
PI: CLAUDE CANIZARES
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: The goal of this project is twofold. We will take high resolution X-ray
spectra of Seyfert galaxy nuclei to study their structure and dynamics. We will
also study the plasma associated with intervening galaxies along the line of
sight to a quasar. We will observe the Seyfert 2 galaxy NGC 5506 to study its
emission lines, variability, and nature of its extended emission. Chandra will
allow us to spatially and spectrally resolve the nuclear and extended components
of the AGN. We will observe Seyfert 1 galaxy Mkn 766 to study its warm absorber
and variability. Finally, we will search for X-ray absorption in the spectrum of
QSO H1821+643 from intervening systems.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
12:18:26.50 +29:48:46.00 MKN 766 ACIS-S HETG 90.00
14:13:14.90 -03:12:27.00 NGC 5506 ACIS-S HETG 90.00
18:21:57.30 +64:20:36.40 H 1821+643 ACIS-S HETG 100.00
===================================================================================
Proposal Number: 02700083
Proposal Title: A HIGH RESOLUTION X-RAY SPECTRUM OF THE NUCLEUS OF CENTAURUS A
PI: STEPHEN MURRAY
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: The X-ray spectrum of the nucleus is well described by a heavily
absorbed ($N_H$=10$^{23}$) power law (photon index 1.9) with a soft excess below
2 keV and Fe K emission. Previous observations of the nucleus have not had the
spatial resolution to clearly separate the nuclear emission from that of the jet
and diffuse emission from the hot ISM, nor have they had the resolution to
resolve the spectral lines from the continuum. The purpose of this observation is
to quantify the energy, shape, intensity, and variability of the emission lines,
absorption edges and the continuum to constrain the nuclear environment.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
13:25:27.40 -43:01:11.00 CENTAURUS A ACIS-S HETG 50.00
13:25:27.40 -43:01:11.00 CENTAURUS A ACIS-S HETG 50.00
===================================================================================
Proposal Number: 02700092
Proposal Title: GPS QUASARS AND THE SURROUNDING HOT MEDIUM
PI: STEPHEN MURRAY
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: GPS quasars are extraordinarily compact radio sources that nevertheless
have a classic double-lobed structure, albeit on a tiny scale. Are these sources
new born and expanding, or are they in a state of arrested development, confined
by a high pressure surrounding medium? Either answer will yield new understanding
of quasars. We will also be able to disentangle the central quasar emission from
the surrounding hot medium.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
06:26:02.90 +82:02:25.50 Q0615+820 ACIS-S NONE 50.00
===================================================================================
Proposal Number: 02700128
Proposal Title: DETERMINING THE NATURE OF THE VARIABLE ABSORPTION IN AGN:
MONITORING NGC 3783 WITH HST & CHANDRA
PI: D CRENSHAW
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: The frequent occurrence of intrinsic absorption indicates that an
important component has been missing from our overall picture of active galaxies.
To understand the nature and origin of this component, and thereby use it as a
probe of the active nucleus, we must know its location, physical conditions, and
kinematics. Variability monitoring is the key to understanding the absorbers, by
providing their radial locations, densities, and evolution in ionization, column
density, velocity, and coverage of the inner active nucleus. HST/STIS and Chandra
are ideal instruments for this pursuit, and NGC3783 is an ideal target, because
it shows extremely variable absorption and rapid continuum variability in both
the UV and X-rays.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
11:39:02.40 -37:44:24.00 NGC 3783 ACIS-S LETG 20.00
11:39:02.40 -37:44:24.00 NGC 3783 ACIS-S LETG 20.00
11:39:02.40 -37:44:24.00 NGC 3783 ACIS-S LETG 20.00
11:39:02.40 -37:44:24.00 NGC 3783 ACIS-S LETG 20.00
11:39:02.40 -37:44:24.00 NGC 3783 ACIS-S LETG 20.00
11:39:02.40 -37:44:24.00 NGC 3783 ACIS-S LETG 20.00
11:39:02.40 -37:44:24.00 NGC 3783 ACIS-S LETG 20.00
===================================================================================
Proposal Number: 02700131
Proposal Title: STUDIES OF RADIO JETS AND THE NARROW LINE REGIONS OF ACTIVE
GALAXIES
PI: ANDREW WILSON
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: The X-ray emission of radio jets and of the narrow line regions of
active galaxies will be investigated with Chandra. Images and spectra will be
obtained to define the morphologies, X-ray powers, emission mechanisms and
physical conditions of both unresolved nuclear and extended emission. Detection
of non-thermal X-rays (inverse Compton or synchrotron emission) will probe the
properties of the magnetic fields and cosmic ray spectra. If thermal X-ray
emission is detected, the density, temperature and chemical abundances of hot gas
can be derived and the relationship to other components (radio emission, narrow
line region) studied. Hot gas can be associated with hot radiatively driven
winds, shocks driven by mass outflow or cooling accretion flows.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
00:49:47.80 +32:16:39.70 NGC266 ACIS-S NONE 2.00
02:46:19.10 -30:16:28.00 NGC1097 ACIS-S NONE 5.00
02:46:19.10 -30:16:28.00 NGC1097 ACIS-S NONE 5.00
04:33:11.10 +05:21:15.60 3C120 ACIS-S NONE 1.00
04:33:11.10 +05:21:15.60 3C120 ACIS-S NONE 13.00
10:14:15.00 +03:27:57.10 NGC3169 ACIS-S NONE 2.00
10:16:53.60 +73:24:02.70 NGC3147 ACIS-S NONE 2.00
10:23:27.00 +19:53:54.40 NGC3226 ACIS-S NONE 2.00
12:09:36.30 +42:32:01.70 NGC4143 ACIS-S NONE 2.00
12:18:57.50 +47:18:14.20 NGC4258 ACIS-S NONE 7.00
12:18:57.50 +47:18:14.20 NGC4258 ACIS-S NONE 22.00
12:25:46.70 +12:39:43.50 NGC4388 ACIS-S NONE 20.00
12:35:26.40 +14:29:47.10 NGC4548 ACIS-S NONE 2.00
12:35:30.10 +12:13:18.50 NGC4550 ACIS-S NONE 2.00
13:29:52.30 +47:11:53.80 M51 ACIS-S NONE 29.00
14:43:02.80 +52:01:37.30 3C303 ACIS-S NONE 15.00
15:06:29.40 +55:45:49.30 NGC5866 ACIS-S NONE 2.00
16:51:08.20 +04:59:33.80 3C348 (HERCULES A) ACIS-S NONE 15.00
21:37:45.20 -14:32:55.40 PKS 2135-14 ACIS-S NONE 15.00
21:57:06.00 -69:41:23.70 PKS 2153-69 ACIS-S NONE 15.00
===================================================================================
Proposal Number: 02700124
Proposal Title: FOLLOW - UP ON CHANDRA SURVEY OF GRAVITATIONAL LENSES FOR
TIME-DELAY MEASUREMENTS
PI: GORDON GARMIRE
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: The main goal of this proposal is to measure cosmological distances
using the X-ray time delays observed in varying gravitationally lensed quasars.
The proposed study offers the prospect of obtaining substantially more accurate
measurements of the critical quantities H0 and q0.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
04:14:37.70 +05:34:42.00 MITG J0414+0534 ACIS-S NONE 10.00
09:11:27.50 +05:50:52.00 RXJ0911.4+0551 ACIS-S NONE 10.00
11:18:16.90 +07:45:59.40 PG1115+080 ACIS-S NONE 10.00
14:24:38.10 +22:56:01.00 Q1422+231 ACIS-S NONE 10.00
22:40:30.34 +03:21:28.80 2237+0305 ACIS-S NONE 10.00
===================================================================================
Proposal Number: 02700058
Proposal Title: THE X-RAY PROPERTIES OF LOW-LUMINOSITY ACTIVE GALACTIC NUCLEI IN
NEARBY GALAXIES
PI: GORDON GARMIRE
Subject Category: ACTIVE GALAXIES AND QUASARS
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
01:43:01.60 +13:38:23.10 NGC 660 ACIS-S NONE 2.00
01:47:30.10 +27:19:56.60 IC 1727 ACIS-S NONE 2.00
08:14:40.40 +49:03:51.00 NGC 2541 ACIS-S NONE 2.00
08:52:41.20 +33:25:09.40 NGC 2683 ACIS-S NONE 2.00
11:18:55.60 +13:05:28.90 NGC 3623 ACIS-S NONE 2.00
12:10:33.20 +30:24:12.80 NGC 4150 ACIS-S NONE 2.00
12:26:26.30 +31:13:18.00 NGC 4414 ACIS-S NONE 2.00
17:49:27.00 +70:08:45.00 NGC 6503 ACIS-S NONE 2.00
===================================================================================
Proposal Number: 02700087
Proposal Title: X-RAY LUMINOUS STARBURST GALAXY ARP299
PI: STEPHEN MURRAY
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose to use ACIS to observe the star-forming galaxy Arp299 which
has an X-ray luminosity Lx ~10E42 erg s-1 (0.1-10.0keV). It is therefore one of
the most X-ray luminous star-forming galaxies in the local universe. Although it
is bona-fide star-forming galaxy, according to very detailed optical, infrared
and mid-infrared spectroscopy, it rivals the X-ray luminosity of Seyfert galaxies
in both the soft and the hard X-ray band. Our primary aim is to identify the
mechanism responsible for the production of its hard X-ray emission, the nature
of which will have general relevance to all star-forming galaxies, and requires
the excellent spatial resolution of Chandra.Also we will study the populations of
the extranuclear sources and compare with results from other systems.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
11:28:27.30 +58:34:42.00 ARP299 ACIS-I NONE 25.00
===================================================================================
Proposal Number: 02700063
Proposal Title: CHANDRA OBSERVATIONS OF GRAVITATIONALLY LENSED QUASARS WITH
INTRINSIC ABSORPTION
PI: GORDON GARMIRE
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: The main goal of this proposal is to determine the nature of the X-ray
absorption associated with BAL and NAL systems over a range of X-ray
luminosities. The magnification factors for our sample of GL systems range
between 20 and 90, depending on the lens geometry, allowing us to investigate the
properties of BAL quasars with X-ray luminosities that are substantially lower
than those of unlensed ones.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
02:32:33.10 -21:17:26.00 HE0230-2130 ACIS-S NONE 15.00
08:31:41.60 +52:45:16.80 APM08279+5255 ACIS-S NONE 10.00
21:52:07.40 -27:31:50.00 HE2149-2745 ACIS-S NONE 10.00
===================================================================================
Proposal Number: 02700170
Proposal Title: GAS DYNAMICS AROUND THE BLACK HOLE IN NGC 3516
PI: TRACEY TURNER
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: NGC 3516 shows a broad, redshifted iron K-line from the inner disk
orbiting the central black hole. ASCA showed the profile to be variable and to
have a narrow 6.4 keV core and an absorption feature at 5.8 keV. If confirmed,
the 5.8 keV feature would be of major importance as it implies high velocity
infall, which is rarely observed in AGN. We propose a 200ks HETG observation of
NGC 3516 to confirm and constrain these narrow features around iron-K. We request
simultaneity with our XMM GTO long-look, which will measure the broad component.
Our HETG data will also detect numerous emission and absorption features from the
warm absorber. Combined with our LETG and XMM/RGS data, we can build a complete
picture of the highly-ionized, multiphase gas surrounding this AGN.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
11:06:47.40 +72:34:07.00 NGC 3516 ACIS-S HETG 36.16
11:06:47.40 +72:34:07.00 NGC 3516 ACIS-S HETG 74.54
11:06:47.40 +72:34:07.00 NGC 3516 ACIS-S HETG 89.31
===================================================================================
Proposal Number: 02700186
Proposal Title: AN X-RAY STUDY OF THE MOST DISTANT QUASARS FROM THE SLOAN
DIGITAL SKY SURVEY
PI: WILLIAM BRANDT
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose to continue our systematic Chandra and XMM-Newton study of
the highest redshift quasars found by the Sloan Digital Sky Survey (SDSS). SDSS
quasars are selected in a uniform and highly effective manner, and they are ideal
for defining the basic X-ray properties of the youngest known quasars. In
particular, we ultimately hope to determine if the most distant radio-quiet
quasars show X-ray absorption or continuum shape differences from those at lower
redshifts. Here we request a 40 ks spectroscopic observation of an optically
bright quasar found at z = 5.80 as well as exploratory 5 ks observations designed
to provide us with complete X-ray coverage of all published luminous quasars with
z > 4.8. We also propose to observe a z = 4.61 quasar that lacks emission lines.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
02:11:02.70 -00:09:10.30 SDSS021102-000910 ACIS-S NONE 5.00
11:29:56.10 -01:42:12.40 SDSSJ112956-014212 ACIS-S NONE 5.00
12:08:23.80 +00:10:27.70 SDSS120823+001027 ACIS-S NONE 5.00
12:49:42.10 +33:49:52.00 PC 1247+3406 ACIS-S NONE 5.00
15:32:59.90 -00:39:44.10 SDSSJ153259-003944 ACIS-S NONE 5.00
16:05:01.20 -01:12:20.00 SDSS160501-011220 ACIS-S NONE 5.00
===================================================================================
Proposal Number: 02700264
Proposal Title: SIMULTANEOUS HST AND CHANDRA OBSERVATIONS OF THE X-RAY/UV
ABSORBERS IN SEYFERT 1 GALAXIES
PI: TAHIR YAQOOB
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: Outflowing photoionized gas with a substantial covering factor is a
major nuclear component in at least 50% of Seyfert 1 galaxies. X-ray observations
suggest multiple zones with highly variable ionization states and column
densities. UV observations reveal multiple kinematic components, each with the
column densities varying in time. This variability means simultaneous, high
spectral-resolution UV and X-ray observations are the only way to decipher the
complex kinematic structure, the true connection between the X-ray and UV
absorbers, and hence form an accurate picture of the environs of the inner
nucleus. We propose a program to do this for a sample of sources using the STIS
echelle grating on HST and the high-energy gratings on Chandra.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
20:44:09.80 -10:43:24.30 MKN 509 ACIS-S HETG 60.00
===================================================================================
Proposal Number: 02700265
Proposal Title: DECONVOLUTION OF THE RELATIVISTIC FE-K LINES IN SEYFERT 1
GALAXIES AND PHYSICS FROM THE NARROW EMISSION COMPONENT
PI: TAHIR YAQOOB
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: Chandra discovered a narrow Fe-K emission line in NGC 5548 which was
anticipated from AGN models but never before unambiguously observed in a Seyfert
1 galaxy. Detecting and measuring the parameters of the narrow line is essential
for better understanding and modeling the relativistically broadened Fe-K lines
in Sy 1 galaxies. The narrow line is in its own right a tracer of the covering
factor, ionization state, location, column, Fe abundance, and velocity field of
circumnuclear matter. Without any knowledge of the narrow Fe-K line, the
accretion disk parameters derived from the relativistic Fe-K component will
always be uncertain. We propose a program to deconvolve the narrow line with
Chandra for a sample of Sy 1s. Chandra is the only mission that can do this for
at least four years.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
01:23:46.10 -58:48:23.10 FAIRALL 9 ACIS-S HETG 80.00
12:39:39.50 -05:20:39.50 NGC 4593 ACIS-S HETG 80.00
===================================================================================
Proposal Number: 02700294
Proposal Title: DETERMINING THE NATURE OF THE VARIABLE ABSORPTION IN NGC 3783
WITH CHANDRA/HST
PI: IAN GEORGE
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose 5 Chandra/HETG observations of NGC 3783, each simultaneous
with HST/STIS observations already approved. The observations will allow the
accurate determination of the variable continuum, absorption & emission line
properties known to exist in this Seyfert, and constitute the most comprehensive
study possible of the nature, origin and evolution of the X-ray & UV absorbers in
an AGN. Such absorbers constitute a major component of the circumnuclear gas in
AGN, and only the HETG has the resolution to make these measurements. It is vital
to perform such a detailed study early in the mission to facilitate the correct
interpretation of the Chandra & XMM observations of this and other AGN. We also
ask the TAC to approve a restructuring of Chandra time already awarded to this
study.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
11:39:02.40 -37:44:24.00 NGC 3783 ACIS-S HETG 170.00
11:39:02.40 -37:44:24.00 NGC 3783 ACIS-S HETG 170.00
11:39:02.40 -37:44:24.00 NGC 3783 ACIS-S HETG 170.00
11:39:02.40 -37:44:24.00 NGC 3783 ACIS-S HETG 170.00
11:39:02.40 -37:44:24.00 NGC 3783 ACIS-S HETG 170.00
===================================================================================
Proposal Number: 02700363
Proposal Title: X-RAY STRUCTURES IN AND AROUND POWERFUL RADIO SOURCES
PI: DIANA WORRALL
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose to continue our AO1 program of ACIS imaging and spectroscopy
of powerful radio sources at z > 0.4. We will use temperature and density
measurements of their X-ray cluster gas to study the cosmological evolution of
active-galaxy environments, and how those environments affect the radio
structures. We will probe the geometry and X-ray emission mechanisms of the
central regions, and test that they contain unabsorbed radio-related X-ray
components (as predicted by our model) even in cases where a torus of gas and
dust is understood to obscure the AGN.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
09:50:10.70 +14:20:00.10 3C 228 ACIS-S NONE 10.80
09:50:10.70 +14:20:00.10 3C 228 ACIS-S NONE 14.20
12:43:57.70 +16:22:53.20 3C 275.1 ACIS-S NONE 25.00
16:20:21.90 +17:36:23.10 3C 334 ACIS-S NONE 30.00
===================================================================================
Proposal Number: 02700372
Proposal Title: PUBLIC OBSERVATIONS OF A WELL-DEFINED SAMPLE OF BAL QSOS FROM
THE LARGE BRIGHT QUASAR SURVEY: REMOVING THE BARRIERS
PI: WILLIAM BRANDT
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: Broad Absorption Line (BAL) QSOs exhibit substantial gas outflows that
are present in most QSOs, but the nature of their X-ray absorption remains
mysterious. It may arise in the outflow itself or in `hitchhiking gas' that
shields the outflow from X-rays. The two main barriers to major progress are (1)
sensitive X-ray surveys to date have focused on small, poorly defined samples and
(2) only a few BAL QSOs bright enough for detailed X-ray studies are known. We
propose public observations of a well-defined sample of BAL QSOs from the Large
Bright Quasar Survey designed to remove these barriers and lead to an explosion
of progress for all. We will relate the X-ray emission/absorption to outflow
properties and discover the X-ray bright BAL QSOs for subsequent follow-up.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
00:22:27.50 +01:24:12.30 LBQS 0019+0107 ACIS-S NONE 5.00
00:24:10.90 -01:56:47.20 LBQS 0021-0213 ACIS-S NONE 7.00
00:27:33.80 -01:34:52.60 LBQS 0025-0151 ACIS-S NONE 5.00
00:31:35.60 +00:34:20.60 LBQS 0029+0017 ACIS-S NONE 7.00
10:31:49.50 -01:41:11.60 LBQS 1029-0125 ACIS-S NONE 5.00
12:08:25.30 +14:19:20.30 LBQS 1205+1436 ACIS-S NONE 6.00
12:11:25.50 +15:18:50.90 LBQS 1208+1535 ACIS-S NONE 5.00
12:14:40.30 +14:28:59.00 Discarded ACIS-S NONE 5.00
12:14:40.30 +14:28:59.00 LBQS 1212+1445 ACIS-S NONE 5.00
12:19:30.90 +10:47:00.70 LBQS 1216+1103 ACIS-S NONE 5.00
12:33:55.60 +13:04:08.50 LBQS 1231+1320 ACIS-S NONE 7.00
12:37:54.80 +08:41:05.40 LBQS 1235+0857 ACIS-S NONE 6.00
12:41:35.90 +09:39:30.60 LBQS 1239+0955 ACIS-S NONE 5.00
13:34:28.00 -01:23:49.20 LBQS 1331-0108 ACIS-S NONE 5.00
14:45:14.80 -00:23:58.60 LBQS 1442-0011 ACIS-S NONE 5.00
14:45:45.30 +01:29:12.40 LBQS 1443+0141 ACIS-S NONE 6.00
21:57:05.90 -19:51:14.10 LBQS 2154-2005 ACIS-S NONE 5.00
22:04:01.60 -18:19:42.40 LBQS 2201-1834 ACIS-S NONE 5.00
23:52:53.50 -00:28:51.10 LBQS 2350-0045A ACIS-S NONE 6.00
===================================================================================
Proposal Number: 02700384
Proposal Title: UNDERSTANDING THE NATURE OF ROSAT BFS
PI: ILARIA CAGNONI
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: The X-ray sky is not as well known as sometimes thought. We are
searching for intriguing populations; one of these are the `blank field
sources'(BFS). We call BFS all the bright ROSAT sources (F_X > 1e-13 erg/cm2/s)
with no optical counterpart on the Palomar Sky survey (to O=21.5) within their
39" (99%) radius error circle (a typical type 1 AGN at these X-ray fluxes would
have B~18). Although they are not rare (~5% of ROSAT high |b| sources) their
nature is still mysterious. The faint optical flux makes their optical
identification difficult. We propose use Chandra to obtain: an accurate position
to nail the optical counterparts, an X-ray spectrum to understand the nature of
these sources and detailed imaging for extension information.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
02:21:09.00 +19:58:15.30 1WGA_J0221.1+1958 ACIS-S NONE 3.00
09:51:28.70 +39:16:36.80 1WGA_J0951.4+3916 ACIS-S NONE 3.00
12:20:38.40 +33:47:26.70 1WGA_J1220.6+3347 ACIS-S NONE 3.00
12:33:25.50 +69:10:14.60 1WGA_J1233.3+6910 ACIS-S NONE 3.00
14:20:05.60 +06:25:25.00 1WGA_J1420.0+0625 ACIS-S NONE 3.00
===================================================================================
Proposal Number: 02700413
Proposal Title: FIGHTING THE AGN UNIFICATION BATTLE WITH CHANDRA
PI: KIMBERLY WEAVER
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: The goal of this proposal is to use the ACIS-S/HETG to once-and-for-all
uncover the true complexity of the Fe K-alpha line in the Seyfert 1.9 galaxy,
MCG-5-23-16. This intermediate class of AGN is crucial for testing challenges to
AGN unification models. We will separate the narrow line core from the broad
component and distinguish between core widths of a few to tens of thousand km/s.
Not only will these data determine whether the narrow component is produced in an
accretion disk or from further out in the galaxy, it will also help to pin down
the relative orientations of the accretion disk and torus.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
09:47:40.20 -30:56:54.30 MCG-5-23-16 ACIS-S HETG 80.00
===================================================================================
Proposal Number: 02700421
Proposal Title: AN X-RAY MICROLENSING TEST OF THE AU-SCALE CENTRAL STRUCTURE OF
THE QUADRUPLE QUASAR 2237+0305
PI: SHIN MINESHIGE
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose Chandra observations of the gravitationally lensed quasar
Q2237+0305 during a microlensing event to reveal its AU scale central structure.
The QSO is being monitored from the ground regularly to ascertain the onset of a
microlensing event. As it occurs, we will measure X-ray spectral variations with
Chandra and compare with those taken after the event. Since a small region of the
QSO accretion disk is strongly magnified during the event, we will be able to
limit the size of its X-ray emitting regions and the mass contained on scales of
several AUs. Together with ground-based telescopes and with HST (TOO observation
approved), we will also be able to resolve the QSO emission regions at multiple
wavelengths and thus critically test AGN accretion disk theories.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
22:40:30.30 +03:21:31.00 QSO2237+0305 ACIS-S NONE 20.00
22:40:30.30 +03:21:31.00 QSO2237+0305 ACIS-S NONE 20.00
22:40:30.30 +03:21:31.00 QSO2237+0305 ACIS-S NONE 20.00
22:40:30.30 +03:21:31.00 QSO2237+0305 ACIS-S NONE 20.00
===================================================================================
Proposal Number: 02700438
Proposal Title: MAGNETIC FIELD STRENGTH IN THE HOTSPOTS OF RADIO GALAXIES &
QUASARS: SYNCHROTRON SELF-COMPTON EMISSION & EQUIPARTITION
PI: MARTIN HARDCASTLE
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: Observations of synchrotron self-Compton (SSC) emission from the
hotspots of powerful extragalactic radio sources allow a direct measurement of
the magnetic field strength in these components, which is vital to our
understanding of their dynamics and energetics. X-ray emission which is
consistent with the predictions of an SSC model has to date been detected in only
three galaxies, with the two most recent detections being made with Chandra. We
propose observations of a carefully chosen sample of quasars and radio galaxies
which will make use of Chandra's unique point-source detection capabilities to
detect SSC emission and measure magnetic field strength, giving us a basis to
make general statements about the field strengths in the extragalactic radio
source population as a whole.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
11:39:59.60 +65:47:43.40 3C263 ACIS-S NONE 50.00
16:09:36.20 +65:56:52.40 3C330 ACIS-S NONE 50.00
17:04:44.10 +60:44:50.50 3C351 ACIS-S NONE 50.00
===================================================================================
Proposal Number: 02700484
Proposal Title: INVERSE COMPTON SCATTERING IN QUASAR RADIO LOBES AND THE
SPECTRUM OF RELATIVISTIC ELECTRONS
PI: GIANFRANCO BRUNETTI
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose to exploit the high spatial resolution and sensitivity of
Chandra to observe 3 powerful steep spectrum radio loud quasars with the aim to
study the extended Inverse Compton (IC) emission from the radio lobes. According
to theoretical models (Brunetti et al. 1997) IC scattering of the infrared and
optical nuclear radiation field from mildly relativistic electrons (gamma about
100-300) results in soft X--ray emission coincident with radio lobes.
Furthermore, due to the scattering configuration, the IC X--ray luminosity is
expected to be much higher in the radio lobe associated with the counter--jet. A
positive detection of this effect would allow to measure the low energy electron
spectrum, to constrain the magnetic field energy density and to test the
equipartition hypothesis.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
01:36:24.00 +20:57:27.00 3C 47 ACIS-S NONE 50.00
08:40:48.00 +13:12:23.00 3C 207 ACIS-S NONE 40.00
===================================================================================
Proposal Number: 02700500
Proposal Title: AN UNBIASED SURVEY OF X-RAY AND OPTICAL EMISSION FROM EXTENDED
RADIO JETS IN AGN
PI: RITA SAMBRUNA
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: The Chandra discovery of an X-ray bright jet in the distant quasar PKS
0637-752 shows that X-rays can be energetically dominant in relativistic jets.
Its X-ray luminosity is higher than at optical, a signature of inverse Compton
process. In contrast, nearby known optical jets are synchrotron-dominated. Are
inverse Compton jets associated with higher redshifts (higher luminosities)? We
propose a Chandra and HST survey of a well-defined sample of radio jets, to find
their X-ray and optical counterparts. We expect solid detections within short
exposures, but even non-detections will be of great interest in showing that
currently known optical/X-ray jets are atypical. Detected jets will be followed
up later to obtain detailed morphologies and probe sites of strong particle
acceleration.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
04:07:48.40 -12:11:37.00 0405-123 ACIS-S NONE 10.00
06:07:59.70 -08:34:50.00 0605-085 ACIS-S NONE 10.00
07:28:11.60 +67:48:48.00 0723+679 ACIS-S NONE 10.00
08:04:47.90 +10:15:23.00 0802+103 ACIS-S NONE 10.00
08:40:02.30 +29:49:00.00 0836+299 ACIS-S NONE 10.00
10:42:44.60 +12:03:31.00 1040+123 ACIS-S NONE 10.00
10:58:29.60 +01:33:59.00 1055+018 ACIS-S NONE 10.00
11:39:10.70 -13:50:44.00 1136-135 ACIS-S NONE 10.00
11:53:24.40 +49:31:09.00 1150+497 ACIS-S NONE 10.00
13:57:04.40 +19:19:07.00 1354+195 ACIS-S NONE 10.00
15:12:50.50 -09:05:60.00 1510-089 ACIS-S NONE 10.00
16:42:07.80 +68:56:40.00 1642+690 ACIS-S NONE 10.00
16:42:58.80 +39:48:37.00 1641+399 ACIS-S NONE 10.00
17:43:56.50 +27:52:50.00 1749+279 ACIS-S NONE 10.00
19:27:48.50 +73:58:02.00 1928+738 ACIS-S NONE 10.00
22:54:21.00 +13:41:48.00 2251+134 ACIS-S NONE 10.00
===================================================================================
Proposal Number: 02700512
Proposal Title: THE ENVIRONMENT OF THE INNER JETS IN 3C31: TESTING DECELERATION
MODELS
PI: MARTIN HARDCASTLE
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: There is much observational evidence that the jets in low-power radio
galaxies decelerate from relativistic to sub-relativistic speeds on scales of
1-10 kpc from the active nucleus. Deceleration is thought to be due to
entrainment of external matter. All models in which deceleration takes place by
entrainment require a steep pressure gradient in the external X-ray-emitting gas
to stabilize the jet. 3C31 is probably the best-studied low-power radio galaxy
with jets of this kind and our excellent radio maps allow us to make a firm
prediction of the pressure gradient within a few kpc of the active nucleus.
Chandra's high resolution will allow us to determine whether the X-ray emission
corresponding to this gradient is really present, and so to test deceleration
models.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
01:07:24.90 +32:24:44.10 3C31 ACIS-S NONE 50.00
===================================================================================
Proposal Number: 02700521
Proposal Title: AN IMAGING OBSERVATION OF NGC 4051 IN THE LOW STATE
PI: PHIL UTTLEY
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: Since 1996, the nearby Seyfert galaxy NGC 4051 has entered two unusual
low X-ray states, lasting several months each. The low state spectrum measured by
RXTE, BeppoSAX and EUVE is dominated by two constant components, a hard
torus-reflection component, and a soft component below 4 keV which is due to
extended emission (seen by the ROSAT HRI), which is unresolved in our previous
low-state observations. Significant EUV variability during the low state also
indicates the presence of residual soft emission from the central source, whose
spectrum will provide important clues as to the nature of the low states. Here we
propose a 50 ksec TOO observation of NGC 4051 in the low state with the ACIS-S,
to clearly separate the residual central source spectrum from that of the
extended emission.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
12:03:09.60 +44:31:53.00 NGC 4051 ACIS-S NONE 50.00
===================================================================================
Proposal Number: 02700561
Proposal Title: STARBURST-AGN CONNECTION: CIRCUMNUCLEAR STAR FORMATION IN
SEYFERT 2
PI: MARIA SANTOS-LLEO
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose to obtain high-resolution deep X-ray images with CHANDRA for
the two nearest Seyfert 2 galaxies with known bright ultraviolet emitting nuclear
star-forming rings. The requested CHANDRA images will allow for the first time to
separate the compact point-like AGN component from the extended diffuse starburst
emission and therefore: (a) investigate the starburst - AGN connection in
Seyferts at high-energies (e.g. in the 0.1 to 10 keV range), (b) characterize the
instrinsic X-ray AGN emission in these sources, and (c) quantify the contribution
of starbursts to the X-ray emission in Seyferts as a function of energy range
from the UV (0.01 kev, available HST images), to soft- (0.1-2 keV) and hard-
(2-10 kev) X-rays
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
12:21:55.00 +04:28:24.90 NGC 4303 ACIS-S NONE 30.00
===================================================================================
Proposal Number: 02700606
Proposal Title: HIGH RESOLUTION IMAGING SPECTROSCOPY OF THE SEYFERT 2 GALAXY NGC
4507
PI: STEVEN KAHN
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: The X-ray spectra of Seyfert 2 galaxies are rich in discrete spectral
features produced in a wide variety of physical conditions. Reprocessed emission
may originate from the active nucleus while the host galaxy may emit thermal
emission from starburst regions that are structurally decoupled from nuclear
activity. We propose to observe NGC 4507 with the Chandra HETGS to obtain a
well-exposed, spatially resolved, high resolution spectrum. We will be able to
distinguish the underlying emission mechanisms and their relative flux
contributions to constrain the physical conditions and structure of the
circumnuclear environment.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
12:35:36.50 -39:54:33.30 NGC 4507 ACIS-S HETG 140.00
===================================================================================
Proposal Number: 02700581
Proposal Title: RED QUASARS AND THE X-RAY BACKGROUND
PI: BELINDA WILKES
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: The Two Micron All-Sky Survey (2MASS) is compiling a sample of new,
red, active galaxies whose number density adds significantly to known
populations. The typical optical polarization of a 2MASS active galactic nucleus
(AGN) is higher than for UV-selected sources, indicating the presence of
substantial obscuration toward the nuclear energy source. We propose Chandra
ACIS-I observations of a well-defined subset of 2MASS AGN to: 1) estimate the AGN
luminosities; 2) measure the line-of-sight obscuration; 3) assemble
near-IR-to-X-ray spectral energy distributions (SEDs). Comparison with AGN
selected by other means will allow us to place the new sources in context, and
determine whether they are the missing ``obscured AGN'' predicted by the Unified
Scheme and cosmic X-ray background.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
00:07:03.60 +15:54:23.80 2MASSJ000703+1554 ACIS-I NONE 3.10
00:50:55.70 +29:33:28.10 2MASSJ005055+2933 ACIS-I NONE 3.30
01:08:35.20 +21:48:18.60 2MASSJ010835+2148 ACIS-I NONE 3.10
01:20:31.60 +20:03:27.90 2MASSJ012031+2003 ACIS-I NONE 1.70
01:57:21.00 +17:12:48.40 2MASSJ015721+1712 ACIS-I NONE 2.70
02:21:50.60 +13:27:41.00 2MASSJ022150+1327 ACIS-I NONE 3.40
02:34:30.60 +24:38:35.50 2MASSJ023430+2438 ACIS-I NONE 3.70
03:48:57.60 +12:55:47.30 2MASSJ034857+1255 ACIS-I NONE 4.10
09:18:48.60 +21:17:17.10 2MASSJ091848+2117 ACIS-I NONE 1.90
09:55:04.60 +17:05:56.10 2MASSJ095504+1705 ACIS-I NONE 4.00
10:27:24.90 +12:19:20.40 2MASSJ102724+1219 ACIS-I NONE 2.90
10:51:44.20 +35:39:30.70 2MASSJ105144+3539 ACIS-I NONE 4.30
12:58:07.50 +23:29:21.50 2MASSJ125807+2329 ACIS-I NONE 3.10
13:00:05.40 +16:32:14.80 2MASSJ130005+1632 ACIS-I NONE 1.00
13:07:00.70 +23:38:05.00 2MASSJ130700+2338 ACIS-I NONE 3.10
14:02:51.20 +26:31:17.50 2MASSJ140251+2631 ACIS-I NONE 1.00
14:53:31.50 +13:53:58.70 2MASSJ145331+1353 ACIS-I NONE 2.50
15:01:13.20 +23:29:08.30 2MASSJ150113+2329 ACIS-I NONE 3.60
15:16:53.20 +19:00:48.40 2MASSJ151653+1900 ACIS-I NONE 1.00
16:37:00.20 +22:21:14.00 2MASSJ163700+2221 ACIS-I NONE 4.10
16:59:39.80 +18:34:36.90 2MASSJ165939+1834 ACIS-I NONE 2.40
17:14:42.80 +26:02:48.50 2MASSJ171442+2602 ACIS-I NONE 3.00
22:22:02.20 +19:52:31.50 2MASSJ222202+1952 ACIS-I NONE 2.20
22:22:21.10 +19:59:47.40 2MASSJ222221+1959 ACIS-I NONE 2.20
22:25:54.30 +19:58:37.00 2MASSJ222554+1958 ACIS-I NONE 4.10
23:44:49.60 +12:21:43.40 2MASSJ234449+1221 ACIS-I NONE 2.20
===================================================================================
Proposal Number: 02700592
Proposal Title: CHANDRA OBSERVATIONS OF THE BRIGHT SEYFERT 1 GALAXY IC 4329A
PI: GRZEGORZ MADEJSKI
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: Next to NGC 4151, the second brightest radio-quiet Seyfert galaxy in
the hard X-ray - to - soft gamma-ray band is IC 4329a. The observations of this
bright yet relatively ordinary Seyfert 1 (z=0.015) yielded a broad-band spectrum
which is often used as a template for modeling of the primary emission processes
in AGN. The goal of this proposal is to study the structure of the Fe K line, as
well as probe the nature of the ionized absorber and the ISM of its own host
galaxy using the continuum as the background light source. To accomplish this, we
propose a 60 ks Chandra METG/HETG grating observation, to be conducted
concurrently with RXTE, for which we have an approved pointing (originally
planned to be simultaneous with an Astro-E observation).
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
13:49:19.20 -30:18:34.00 IC 4329A ACIS-S HETG 60.00
===================================================================================
Proposal Number: 02700703
Proposal Title: SYNCHROTRON SELF-COMPTON X-RAYS FROM OPTICAL JETS IN ACTIVE
GALACTIC NUCLEI
PI: MARK BIRKINSHAW
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: About half the known extragalactic optical jets (mostly those detected
using earlier X-ray telescopes) have been observed with Chandra or are presently
scheduled as targets. Here we propose observations of the four other known
optical jets longer than 2~arcsec. Our purpose is to measure their X-ray outputs,
determine whether the synchrotron or synchrotron self-Compton X-ray process
dominates the radiation mechanism, and hence infer the energy distribution of the
relativistic electron population below the limits probed by the radio maps (for
synchrotron self-Compton emission) or above (for pure synchrotron jets).
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
00:37:04.20 -01:09:08.10 3C15 ACIS-S NONE 30.00
===================================================================================
Proposal Number: 02700726
Proposal Title: SURVEY OF RADIO QUIET Z>4 QUASARS
PI: JILL BECHTOLD
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose to measure the X-ray flux of 7 previously undetected,
optically bright quasars with z>4, including one at z=5. Before Chandra, only 6
radio quiet quasars with z>4 had been detected in X-rays. Our AO1 survey has so
far added 4 more, and observations of 3 others are scheduled. The ones observed
so far are, surprisingly, all very X-ray quiet, with alpha_{ox}>2.2, unlike the
ones which had been detected with ROSAT which had alpha_{ox}=1.5-1.7. Three of
the proposed AO2 quasars had not been discovered in time for AO1 proposals. We
draw our sample from the objects whose emission line spectra have been observed
by Shields and Hamman with Keck and the MMT. These well-studied objects form the
definitive sample of the highest redshift quasars known.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
00:59:22.80 +00:03:01.00 PSS 0059+0003 ACIS-S NONE 2.80
01:06:19.20 +00:48:22.00 BRI 0103+0032 ACIS-S NONE 4.00
01:50:48.80 +00:41:26.00 SDSS0150+0041 ACIS-S NONE 3.30
04:03:56.60 -17:03:24.00 BRI 0401-1711 ACIS-S NONE 4.00
12:04:41.70 -00:21:49.00 SDSS1204-0021 ACIS-S NONE 6.30
16:21:16.90 -00:42:51.10 SDSS1621-0042 ACIS-S NONE 1.50
22:15:27.20 -16:11:33.00 BRI 2212-1626 ACIS-S NONE 3.10
===================================================================================
Proposal Number: 02700728
Proposal Title: FINDING THE BARYONS IN THE LOW REDSHIFT UNIVERSE.
PI: SMITA MATHUR
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: Recent estimates of the primordial deuterium abundance, combined with
the theory of big bang nucleosynthesis (BBN), imply a baryon density parameter
$\Omega_b \approx 0.04 h_{70}^{-2}$. The main reservoir of low redshift baryons
is still ``missing''. All the observed stellar and gaseous components add up to
only $\Omega_b \approx 0.004h_{70}^{-1}$, a factor of ten below the BBN
abundance. Hydrodynamic cosmological simulations predict that a large fraction of
the low redshift baryons should reside in a hot diffuse intergalactic medium
(IGM). We propose to exploit the excellent spectral resolution of Chandra
gratings to probe the low redshift IGM with sensitive X-ray spectroscopy. We
expect to detect the main reservoir of low redshift baryons with observations of
OVII absorption lines.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
18:21:57.30 +64:20:36.40 H1821+643 ACIS-S LETG 66.00
18:21:57.30 +64:20:36.40 H1821+643 ACIS-S LETG 100.00
18:21:57.30 +64:20:36.40 H1821+643 ACIS-S LETG 167.00
18:21:57.30 +64:20:36.40 H1821+643 ACIS-S LETG 167.00
===================================================================================
Proposal Number: 02700785
Proposal Title: USING CHANDRA TO ELUCIDATE THE STARBURST-AGN CONNECTION
PI: NANCY LEVENSON
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose to examine the connection between active galactic nuclei
(AGN) and starburst galaxies through the observation of a sample of Seyfert 2
galaxies that are known to contain circumnuclear starbursts, based on their
optical and ultraviolet properties. Previous data obtained with ROSAT and ASCA
suggest that a resolved soft X-ray component is thermal emission due to the
starburst in these galaxies. With spatially-resolved spectroscopy, we will
definitively identify the origin of this emission. Removing the confusion of the
starburst, we will also more accurately model the AGN spectra, measuring the
intrinsic absorption, scattered fraction, and contribution of emission lines.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
13:25:43.90 -29:49:58.60 NGC 5135 ACIS-S NONE 30.00
21:48:19.20 -34:57:03.80 NGC 7130 ACIS-S NONE 40.00
===================================================================================
Proposal Number: 02700849
Proposal Title: HUNTING THE AGN CORES AND JETS IN FRI RADIO GALAXIES
PI: DIANA WORRALL
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose to continue our AO1 program of ACIS imaging and spectroscopy
to separate the physically distinct components that are confused in ROSAT images
and spectra of the cores of B2 radio galaxies. The ACIS combined spatial and
spectral resolution will resolve the cooling flows that are suggested in some
cases, and decide the ubiquity of a highly absorbed AGN component reported to be
in some FRI radio galaxies. The data will further our study of the relationship
between B2 radio galaxies and BL Lac objects, and allow us to model the X-ray
elongations seen in some images in terms of the physics of the radio structures.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
03:29:23.90 +39:47:32.00 B2 0326+39 ACIS-S NONE 16.00
16:23:03.10 +37:55:20.20 B2 1621+38 ACIS-S NONE 5.00
22:38:29.40 +35:19:47.00 B2 2236+35 ACIS-S NONE 10.00
===================================================================================
Proposal Number: 02700851
Proposal Title: THE X-RAY EMISSION OF COMPOSITE GALAXIES
PI: ANDREAS ZEZAS
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose to observe 2 low-redshift galaxies classified as
HII/Seyfert-2 composites, as their optical spectra have the characteristics of
star-forming galaxies and very weak signatures of AGN activity. However their
high X-ray luminosities (Lx~10^{42-43} erg/s) are typical of broad-line AGN.
These objects are considered as nearby examples of the NELGS detected in deep
surveys which produce a large fraction of the X-ray background. The Chandra
observations will allows us to check whether our objects a) host a powerful
point-like source and thus harbour a 'naked' AGN (with a weak or absent
broad-line region) or a heavily obscured AGN or b) have extended X-ray emission
and thus are among the most powerful star-forming galaxies in the Universe
similar to those found at high redshifts.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
00:34:13.80 -21:26:21.00 IRAS00317-2142 ACIS-S NONE 20.00
20:07:51.70 -11:08:37.00 IRAS20051-1117 ACIS-S NONE 20.00
===================================================================================
Proposal Number: 02700664
Proposal Title: EXPLORING INVERSE COMPTON X-RAYS FROM LOBES OF RADIO GALAXIES
PI: NAOKI Isobe
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose to observe with ACIS three compact radio galaxies with
double-lobe morphorogy, 3C452, 3C427.1 and 3C438. We can detect diffuse
non-thermal X-rays from their synchrotron radio lobes, arising via
inverse-Compton scattering on the cosmic microwave background photons. Our main
objetvive is to determine the energy densities of magnetic field and electrons in
the lobes, by comparing the inverse-Compton X-ray flux with the radio synchrotron
radio flux.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
21:04:06.40 +76:33:12.00 3C 427.1 ACIS-S NONE 40.00
22:45:49.00 +39:41:15.00 3C 452 ACIS-S NONE 80.00
===================================================================================
Proposal Number: 02700669
Proposal Title: LOW-LUMINOSITY RADIO LOUD AGN IN NEARBY ELLIPTICALS WITH
DYNAMICAL NUCLEAR MBHS
PI: GIUSEPPINA FABBIANO
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose to obtain ACIS-S back-illuminated observations of IC 1459
(60 ks) and NGC 4552 (80 ks). These two nearby giant ellipticals have little hot
halo X-ray emission, massive (a few 10**8 Msol) nuclear black holes (MBH), and
radio-loud AGNs with peculiarly weak optical/UV and hard X-ray emission. Chandra
observations will cleanly separate the nuclear X-ray source from the surrounding
emission, and discriminate between ADAF, obscuration, and `mini-BL~Lac' models
for the low-luminosity AGN. We will perform X-ray imaging spectroscopy of the
ENLRs, and compare them with the ENLRs of Seyferts; determine the physical
parameters of the hot ISM and explore MBH - ISM interaction.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
22:57:10.60 -36:27:44.00 IC 1459 ACIS-S NONE 60.00
===================================================================================
Proposal Number: 02700723
Proposal Title: CHANDRA OBSERVATIONS OF NEARBY LLAGN: STARBURSTS OR AGNS ?
PI: ANDREAS ZEZAS
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: We propose to observe four nearby Low-Luminosity AGNs with ACIS-S3 (BI)
for 30Ks each. These LLAGN are classified as either LINER-2 or ``transition''
objects based on high quality optical spectra. The nature of this class of
objects has been a matter of debate over the last few years. With these
observations we will be able to determine the mechanism which powers these
galaxies: distinguish between an advection dominated AGN, a classical AGN or
starburst.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
13:15:49.20 +42:01:49.00 NGC 5055 ACIS-S NONE 30.00
22:37:04.10 +34:24:56.00 NGC 7331 ACIS-S NONE 30.00
===================================================================================
Proposal Number: 02708043
Proposal Title: THE ORIGIN OF THE DRAMATIC FLUX AND SPECTRAL VARIABILITY IN THE
CIRCINUS GALAXY
PI: GIORGIO MATT
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: The Circinus Galaxy is one of the nearest AGN and the brightest
Compton-thick Seyfert 2. Due to heavy obscuration, below 10 keV the spectrum is
dominated by a reflection component, the nucleus starting to be observable above
~20 keV. No evidence for variability was present before we observed the Circinus
Galaxy with BeppoSAX on 2001 January 7. The source has dramatically changed with
since June 2000 both in flux and spectral shape. Below 10 keV, the flux increases
by almost 50\%,the spectrum becoming steeper. Above that energy, the change was
much smaller, if any. There are two explanations: a) A past variation of the
nuclear emission echoed by the reflection component. b) A burst from a off-center
source reaching the luminosity of 10**40 erg/s, as that observed in M82 and
attributed to accretion onto a black hole with a few hundred times the solar mass
BeppoSAX cannot solve this ambiguity. Only a high angular resolution observation
with Chandra can do it.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
14:13:09.30 -65:20:21.00 CIRCINUS GALAXY ACIS-S NONE 5.00
===================================================================================
Proposal Number: 02708057
Proposal Title: CHANDRA OBSERVATIONS OF THE THREE HIGHEST REDSHIFT QUASARS FROM
THE SDSS
PI: WILLIAM BRANDT
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: X-ray studies of the highest redshift quasars provide insight into the
evolution of quasar central power sources and environments. Large X-ray efforts
(e.g., XEUS and Constellation-X) are being planned to study the z=5-20 Universe
despite a lack of X-ray information on the Universe at these redshifts. Chandra
can efficiently provide precious, basic information on the highest redshift
quasars due to its high sensitivity. Three high-redshift quasars at z=6.28, 5.99,
5.82 have been recently discovered by the Sloan Digital Sky Survey; they are
bright with AB_1450=19.7, 19.6, 18.8. We propose exploratory Chandra observations
of these three objects designed to define their basic X-ray properties and
determine if spectroscopic X-ray observations are merited. If these quasars are
detected, this will hopefully capture the public's interest leading to further
appreciation of the power of Chandra. Co-Is on this proposal are SDSS members
Anderson, Fan, Gunn, Richards, Schneider, Strauss, Voges.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
10:30:27.10 +05:24:55.00 SDSSP J103027+052455 ACIS-S NONE 8.00
===================================================================================
Proposal Number: 02708059
Proposal Title: CHANDRA OBSERVATIONS OF THE THREE HIGHEST REDSHIFT QUASARS FROM
THE SDSS
PI: WILLIAM BRANDT
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: X-ray studies of the highest redshift quasars provide insight into the
evolution of quasar central power sources and environments. Large X-ray efforts
(e.g., XEUS and Constellation-X) are being planned to study the z=5-20 Universe
despite a lack of X-ray information on the Universe at these redshifts. Chandra
can efficiently provide precious, basic information on the highest redshift
quasars due to its high sensitivity. Three high-redshift quasars at z=6.28, 5.99,
5.82 have been recently discovered by the Sloan Digital Sky Survey; they are
bright with AB_1450=19.7, 19.6, 18.8. We propose exploratory Chandra observations
of these three objects designed to define their basic X-ray properties and
determine if spectroscopic X-ray observations are merited. If these quasars are
detected, this will hopefully capture the public's interest leading to further
appreciation of the power of Chandra. Co-Is on this proposal are SDSS members
Anderson, Fan, Gunn, Richards, Schneider, Strauss, Voges.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
13:06:08.30 +03:56:26.30 SDSSP J130608+035626 ACIS-S NONE 8.00
===================================================================================
Proposal Number: 02708060
Proposal Title: CHANDRA OBSERVATIONS OF THE THREE HIGHEST REDSHIFT QUASARS FROM
THE SDSS
PI: WILLIAM BRANDT
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: X-ray studies of the highest redshift quasars provide insight into the
evolution of quasar central power sources and environments. Large X-ray efforts
(e.g., XEUS and Constellation-X) are being planned to study the z=5-20 Universe
despite a lack of X-ray information on the Universe at these redshifts. Chandra
can efficiently provide precious, basic information on the highest redshift
quasars due to its high sensitivity. Three high-redshift quasars at z=6.28, 5.99,
5.82 have been recently discovered by the Sloan Digital Sky Survey; they are
bright with AB_1450=19.7, 19.6, 18.8. We propose exploratory Chandra observations
of these three objects designed to define their basic X-ray properties and
determine if spectroscopic X-ray observations are merited. If these quasars are
detected, this will hopefully capture the public's interest leading to further
appreciation of the power of Chandra. Co-Is on this proposal are SDSS members
Anderson, Fan, Gunn, Richards, Schneider, Strauss, Voges.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
08:36:43.90 +00:54:53.30 SDSSP J083643+005453 ACIS-S NONE 6.00
===================================================================================
Proposal Number: 02708063
Proposal Title: CHANDRA MONITORING OF A MICROLENSING EVENT IN MG J0414+0534
PI: GEORGE CHARTAS
Subject Category: ACTIVE GALAXIES AND QUASARS
Abstract: Recent Chandra monitoring of the gravitational lens (GL) system MG
J0414+0534 indicate that images C and B are possibly undergoing microlensing
events. The microlensing event in image B is of particular interest since it is
accompanied by a five-fold increase of the equivalent width of a reprocessed
narrow Fe Ka line in the spectrum of image B. This sudden increase can be
explained with a caustic crossing that selectively enhances a strip of the
reflection emission region of the accretion disk. The main goal of the proposed
DDT observations is to directly probe the various emission regions of an
accretion disk from scales of a few hundred gravitational radii down to the event
horizon of the black hole. We expect to achieve this goal by monitoring changes
in the line energy, intensity, and profile of an Fe Ka line in image B as a
magnification caustic is traversing the accretion disk of the distant z = 2.64
radio loud quasar MG J0414+0534.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
04:14:37.70 +05:34:44.00 MG J0414+0534 ACIS-S NONE 30.00
04:14:37.70 +05:34:44.00 MG J0414+0534 ACIS-S NONE 30.00
04:14:37.70 +05:34:44.00 MG J0414+0534 ACIS-S NONE 30.00
04:14:37.70 +05:34:44.00 MG J0414+0534 ACIS-S NONE 30.00
***********************************************************************************
CLUSTERS OF GALAXIES
--------------------------------------------------
===================================================================================
Proposal Number: 02800021
Proposal Title: THE COOLING FLOW IN 4C55.16
PI: ANDREW FABIAN
Subject Category: CLUSTERS OF GALAXIES
Abstract: 4C55.16 lies in a cluster which has a massive cooling flow which will
be spatially and spectrally studied by Chandra ACIS-S imaging.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
08:34:54.90 +55:34:21.00 4C55.16 ACIS-S NONE 9.00
===================================================================================
Proposal Number: 02800022
Proposal Title: THE COOLING FLOW IN A3558
PI: ANDREW FABIAN
Subject Category: CLUSTERS OF GALAXIES
Abstract: A3558 (S8) is has a structured core and cooling flow which will be
spatially and spectrally studied by Chandra ACIS-S imaging.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
13:27:56.91 -31:29:43.90 A3558 ACIS-S NONE 15.00
===================================================================================
Proposal Number: 02800026
Proposal Title: THE COOLING FLOW IN RXJ0821.0+0752
PI: ANDREW FABIAN
Subject Category: CLUSTERS OF GALAXIES
Abstract: RXJ0821.0+0752 has a massive cooling flow which will be spatially and
spectrally studied by Chandra ACIS-S imaging.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
08:21:02.40 +07:51:47.00 RXJ0821 ACIS-S NONE 10.00
===================================================================================
Proposal Number: 02800025
Proposal Title: THE COOLING FLOW IN A1664
PI: ANDREW FABIAN
Subject Category: CLUSTERS OF GALAXIES
Abstract: A1664 has a massive cooling flow which will be spatially and spectrally
studied by Chandra ACIS-S imaging.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
13:03:42.50 -24:14:41.00 A1664 ACIS-S NONE 10.00
===================================================================================
Proposal Number: 02800024
Proposal Title: THE COOLING FLOW IN RXJ1532.9+3021
PI: ANDREW FABIAN
Subject Category: CLUSTERS OF GALAXIES
Abstract: RXJ1532.9+3021 has a massive cooling flow which will be spatially and
spectrally studied by Chandra ACIS-S imaging.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
15:32:53.80 +30:21:00.00 RXJ1532 ACIS-S NONE 10.00
===================================================================================
Proposal Number: 02800023
Proposal Title: THE COOLING FLOW IN PKS1404-267
PI: ANDREW FABIAN
Subject Category: CLUSTERS OF GALAXIES
Abstract: PKS1404-267 is nearby and has a cooling flow which will be spatially
and spectrally studied by Chandra ACIS-S imaging.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
14:07:29.79 -27:01:05.10 PKS1404-257 ACIS-S NONE 7.00
===================================================================================
Proposal Number: 02800036
Proposal Title: HETG OBSERVATIONS OF THE DISTANT MASSIVE COOLING FLOW ZW3146
PI: CLAUDE CANIZARES
Subject Category: CLUSTERS OF GALAXIES
Abstract: We propose to obtain HETGS data on the distant, massive cooling flow
cluster ZW3146. The high redshift of this object (z=0.2910) and large cooling
rate (1400 solar masses/yr) make it an excellent candidate for measuring various
strong X-ray emission lines from cooling ICM plasma. The HETG will allow us to
measure a number of X-ray emission lines from the cooling gas. Each of these
measurements will provide an independent test of the cooling rates as well as
constrain the presence of multi-temperature gas in the core. The 0 order image of
the cluster will also be analyzed to constrain the spatial variations of such
quantities as the ambient gas temperature, excess absorption, abundance
gradients, and overall mass budget in the cluster.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
10:23:39.60 +04:11:10.00 ZW3146 ACIS-S HETG 184.00
===================================================================================
Proposal Number: 02800079
Proposal Title: CHANDRA OBSERVATIONS OF THE COOLING FLOW CLUSTER ABELL 1068
PI: STEPHEN MURRAY
Subject Category: CLUSTERS OF GALAXIES
Abstract: We propose to observe the X-ray bright, z=0.14 cluster Abell 1068. We
intend to map the X-ray emission in the inner 20 kpc of the cD galaxy, where an
~80 solar mass per year star burst is seen in optical imagery (H_0=50 km/s/Mpc).
A1068 is a strong infrared source (consistent with being a star burst), and the
cluster apparently harbors a several hundred solar mass per year cooling flow.
Furthermore, optical images show strong evidence for a tidal or ram pressure
interaction between the cD and two neighboring galaxies. We will use the Chandra
data to measure the mass accretion rates, and we will compare them to star
formation rates measured on the same spatial scales. The derived electron
densities will be used to model the efficiency of ram pressure stripping in the
cluster's core.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
10:40:44.40 +39:57:10.20 ABELL 1068 ACIS-S NONE 30.00
===================================================================================
Proposal Number: 02800085
Proposal Title: DEEP X-RAY IMAGE OF ABELL 2163
PI: STEPHEN MURRAY
Subject Category: CLUSTERS OF GALAXIES
Abstract: We propose to obtain a deep high resolution X-ray image of A2163. We
will obtain a detailed temperature map of the cluster central region. We also
will measure the X-ray surface brightness distribution to large radius to
constrain the clumpiness of the hot gas.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
16:15:45.77 -06:08:55.00 ABELL 2163 ACIS-I NONE 80.00
16:15:55.00 -06:26:59.00 ABELL 2163 ACIS-I NONE 10.00
===================================================================================
Proposal Number: 02800088
Proposal Title: DETERMINATION OF H0 AND Q0, 2000 PART 2
PI: LEON VANSPEYBROECK
Subject Category: CLUSTERS OF GALAXIES
Abstract: These observations form part of a systematic determination of H0 and q0
by combining X-ray observations of distant galaxy clusters with radio
measurements of the Sunyaev Zel'dovich effect.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
02:57:07.90 -23:26:06.00 MACS J0257.1-2325 ACIS-I NONE 20.00
07:17:31.00 +37:45:39.60 MACS J0717.5+3745 ACIS-I NONE 20.00
11:49:35.80 +22:23:56.40 MACS J1149.5+2223 ACIS-I NONE 20.00
14:23:48.00 +24:04:44.40 MACS J1423.8+2404 ACIS-I NONE 20.00
===================================================================================
Proposal Number: 02800089
Proposal Title: DETERMINATION OF H0 AND Q0, 2000 PART 1
PI: LEON VANSPEYBROECK
Subject Category: CLUSTERS OF GALAXIES
Abstract: These observations form part of a systematic determination of H0 and q0
by combining X-ray observations of distant galaxy clusters with radio
measurements of the Sunyaev Zel'dovich effect.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
01:09:28.10 +31:49:22.80 CL 0107+31 ACIS-I NONE 55.00
08:50:06.30 +36:04:20.00 ZWCL 1953 ACIS-I NONE 25.00
11:20:57.80 +23:26:42.00 V 1121+2327 ACIS-I NONE 80.00
11:55:18.20 +23:24:28.80 A1413 ACIS-I NONE 10.00
12:21:24.50 +49:18:14.40 V 1221+4918 ACIS-I NONE 80.00
13:11:29.50 -01:20:09.60 A1689 ACIS-I NONE 10.00
15:24:40.30 +09:57:39.60 V 1525+0958 ACIS-I NONE 50.00
15:32:54.00 +30:21:00.00 RXJ 1532.9+3021 ACIS-I NONE 10.00
16:35:52.80 +66:12:50.40 A2218 ACIS-I NONE 50.00
20:56:20.51 -04:37:52.25 MS 2053.7-0449 ACIS-I NONE 45.00
===================================================================================
Proposal Number: 02800125
Proposal Title: THE COOLING FLOW IN SERSIC 159-03
PI: ANDREW FABIAN
Subject Category: CLUSTERS OF GALAXIES
Abstract: The cluster Sersic 159-03 is strongly peaked in the X-ray band
indicating a cooling flow. It is also shows optical emission line filaments.
Chandra ACIS-S observations will show the cooling time and rate of the gas and
any interaction with the filaments.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
23:13:58.30 -42:43:35.00 SERSIC 159-03 ACIS-S NONE 10.00
===================================================================================
Proposal Number: 02800104
Proposal Title: CHANDRA OBSERVATIONS OF THE COOLING FLOW CLUSTER A478
PI: STEPHEN MURRAY
Subject Category: CLUSTERS OF GALAXIES
Abstract: A deep ACIS observation of the luminous, hot, relaxed cooling flow
cluster A478 will 1) map the gas temperature and total mass within the cluster
core; 2) study the inhomogeneities and structure in the cooling flow region; 3)
measure the amount of any cool, absorbing gas near the cluster center; 4)
determine the distribution of heavy elements in the cooling flow region; and 5)
allow a determination of H_0 by measuring the gas density and temperature
properties and comparing these with the measured Sunyaev-Zeldovitch effect for
this cluster.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
04:13:25.39 +10:27:57.05 A 478 ACIS-S NONE 40.00
===================================================================================
Proposal Number: 02800143
Proposal Title: THE INTERACTION BETWEEN RADIO GALAXIES AND ICM IN THE CORES OF
CLUSTERS
PI: ALASTAIR EDGE
Subject Category: CLUSTERS OF GALAXIES
Abstract: The outflow of relativistic plasma from radio galaxies is one of the
most efficient transport processes known in astrophysics. The observation of
X-ray `holes' in a number cluster cores indicates that this expanding plasma
evacuates the region of the lobes. Using the volume of the `hole' and the
observed ICM pressure we can calculate the energy input into the lobe in the form
of kinetic energy. We propose to observe four radio galaxies with symmetrical
double lobes selected from the cores of a sample of 200 northern ROSAT clusters.
These targets are carefully chosen using VLA imaging and represent the best
opportunity to exploit the spatial resolution offered by Chandra.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
08:19:25.70 +63:37:28.00 RXJ0819.6+6336 ACIS-S NONE 15.00
11:43:39.50 +46:21:22.00 A1361 ACIS-S NONE 9.00
11:43:39.50 +46:21:22.00 A1361 ACIS-S NONE 15.00
===================================================================================
Proposal Number: 02800145
Proposal Title: NEWLY DISCOVERED MASSIVE, MODERATE REDSHIFT X-RAY CLUSTERS OF
GALAXIES
PI: SABINE SCHINDLER
Subject Category: CLUSTERS OF GALAXIES
Abstract: We propose to do follow-up observations of newly discovered massive
X-ray clusters of galaxies from the ROSAT Bright Survey. These clusters at
moderate to high redshifts are the most promising candidates of a programme on
the NTT to search for gravitationally lensed arcs. The Chandra observations
provide the necessary morphological information needed for detailed lensing
models. Furthermore, temperatures und metallicities of the clusters will be
measured with these Chandra observations in order to determine X-ray masses, the
time scales and the processes responsible for the metal enrichment. These are all
important steps in order to understand cluster formation, galaxy formation and
cosmology.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
03:01:07.60 -47:06:35.00 RBS380 ACIS-I NONE 10.00
09:47:13.20 +76:23:17.00 RBS797 ACIS-I NONE 12.00
===================================================================================
Proposal Number: 02800150
Proposal Title: FILAMENTARY RADIO RELICS AND MERGERS IN CLUSTERS OF GALAXIES
PI: CRAIG SARAZIN
Subject Category: CLUSTERS OF GALAXIES
Abstract: We propose high-resolution Chandra observations of the filamentary
radio relics in the clusters A133, A4038, and A13. They are predicted to have
filamentary inverse Compton (IC) X-ray emission at detectable levels which will
be imaged with Chandra. The IC emission will also be detected in resolved X-ray
spectra of the regions of the radio relics. We will determine the intracluster
magnetic field, the energy density in relativistic particles, and limit the role
of nonthermal pressure in cluster dynamics. These and other radio relics occur in
clusters undergoing mergers, which suggests that the radio-emitting electrons are
accelerated in merger shocks. We will determine the dynamics of the cluster,
locate any merger shocks, and determine the efficiency of shock acceleration.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
01:02:41.30 -21:52:40.00 A133 ACIS-S NONE 36.00
===================================================================================
Proposal Number: 02800171
Proposal Title: MERGER SHOCKS IN CLUSTERS OF GALAXIES
PI: CRAIG SARAZIN
Subject Category: CLUSTERS OF GALAXIES
Abstract: Major mergers of clusters are the most energetic events in the present
Universe. We propose Chandra observations of 3 merging clusters to detect shocks
in the intracluster gas. We will use these shocks to determine the global
dynamics and local physics of the intracluster medium. Shock physics will
determine: (a) if the kinetic energy is effectively thermalized in shocks or if
much of the shock energy goes into turbulence, magnetic fields, or cosmic rays;
(b) if electrons undergo collisionless heating in the shocks; (c) whether the
acceleration of relativistic electrons is effective in these shocks; and (d) what
the persistence of small cooling cores tells us about the dynamics of mergers and
peaks in the dark matter distribution in clusters.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
15:10:11.71 +33:29:11.79 A2034 ACIS-I NONE 56.00
===================================================================================
Proposal Number: 02800225
Proposal Title: THE VARIATION OF BARYON FRACTIONS AMONGST GALAXY CLUSTERS: THE
CASE OF ABELL 1204
PI: CALEB SCHARF
Subject Category: CLUSTERS OF GALAXIES
Abstract: Clusters of galaxies have often been considered fair samples of the
Universe. However, variations are now measured in the baryon fraction of massive
clusters. Much of this variation seems likely to be a consequence of
non-gravitational heating of the intracluster medium. We have discovered a
remarkable case of property variation which calls even this explanation into
doubt. The clusters A1060 and A1204 have identical optical richness, X-ray
temperature and iron abundance, yet A1204 is 20 times more X-ray luminous. No
high spatial resolution, spectral imaging exists for A1204. We propose a modest
ACIS observation to accurately measure the baryonic fraction of this cluster, and
understand its apparently anomalous luminosity, and thereby test the fair sample
hypothesis.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
11:13:18.00 +17:36:09.00 ABELL 1204 ACIS-I NONE 25.00
===================================================================================
Proposal Number: 02800251
Proposal Title: INTRACLUSTER MEDIUM DEPLETION AND COOLING FLOW SURVIVAL DURING A
CLUSTER MERGER IN ABELL 1644
PI: JOSEPH MOHR
Subject Category: CLUSTERS OF GALAXIES
Abstract: We propose to use ACIS-I images in combination with an existing weak
lensing mass map to study intracluster medium (ICM) depletion in the complex,
merging cluster Abell 1644. The differing collisional nature of the ICM and the
dark matter can lead to significantly different distributions during mergers. The
deep ACIS images will allow us to probe for faint X-ray emission from two
apparently gas poor mass concentrations in the mass map. In addition, we hope to
use the high resolution Chandra image to study the complex morphology of the ICM
surrounding the central, giant elliptical. We will test whether the merging
occuring on large scales has led to a flow of the central, cooling unstable ICM
with respect to the central, giant galaxy.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
12:57:09.60 -17:24:36.00 ABELL 1644 ACIS-I NONE 20.00
===================================================================================
Proposal Number: 02800347
Proposal Title: ACTIVE GALAXIES AND THEIR IGM ENVIRONS IN THE LARGE-SCALE A2125
COMPLEX AT Z=0.25
PI: Q. DANIEL WANG
Subject Category: CLUSTERS OF GALAXIES
Abstract: We propose a Chandra ACIS-I observation of a large-scale X-ray-emitting
complex, which contains several clusters/groups of galaxies and possibly
substantial amounts of hot intercluster gas at z=0.25. This observation, together
with a multiwavelength deep survey of the region, will be used to study the
population of active galaxies (e.g., AGNs) and their interplay with environs. A
very deep radio survey already shows a large number of radio-loud galaxies
associated with the complex. The X-ray observation will allow us to determine the
nature of such galaxies and likely to discover many radio-quiet active galaxies.
We will also examine detailed physical properties of prominent X-ray-emitting
features and determine the content of the hot intercluster medium in the
complex.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
15:40:45.00 +66:13:00.00 A2125 ACIS-I NONE 80.00
===================================================================================
Proposal Number: 02800369
Proposal Title: ACIS-S/HETG OBSERVATIONS OF THE CENTRAL REGION OF THE HYDRA A
CLUSTER OF GALAXIES
PI: J. JERNIGAN
Subject Category: CLUSTERS OF GALAXIES
Abstract: We propose to use ACIS-S/HETG to observe the central region of the
HYDRA A cluster of galaxies. By combining six 10 ksec ACIS-S/HETG observations of
this target with the existing 20 ksec ACIS-S/None calibration observation we will
measure the coupled spatial structure (5 arc second) and spectral structure
(resolution of 100 at 1 keV). These results can for the first time directly
determine whether or not a cooling flow is associated with the central region of
HYDRA A rather than merely showing consistency as demonstrated by prior
measurements with ROSAT and ASCA and recent interpretations of Chandra
ACIS-S/None imaging observations.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
09:18:05.70 -12:05:45.00 HYDRA A ACIS-S HETG 10.00
09:18:05.70 -12:05:45.00 HYDRA A ACIS-S HETG 10.00
09:18:05.70 -12:05:45.00 HYDRA A ACIS-S HETG 10.00
09:18:05.70 -12:05:45.00 HYDRA A ACIS-S HETG 10.00
09:18:05.70 -12:05:45.00 HYDRA A ACIS-S HETG 10.00
09:18:05.70 -12:05:45.00 HYDRA A ACIS-S HETG 10.00
===================================================================================
Proposal Number: 02800376
Proposal Title: HIGH-REDSHIFT CLUSTERS AND CLASSICAL DOUBLES WITH CIGAR-SHAPED
RADIO BRIDGES
PI: MEGAN DONAHUE
Subject Category: CLUSTERS OF GALAXIES
Abstract: We propose (1) to study the properties of the intracluster medium (ICM)
in high- redshift clusters of galaxies; (2) to determine the accuracy with which
ambient gas densities can be estimated using the radio properties of FRIIb radio
sources; and (3) to study the X-ray properties of the radio cores, hotspots, and
lobes/ bridges of FRIIb radio sources. We propose to observe 4
unambiguously-extended X-ray sources for which we have estimated ambient gas
densities from radio observations. The targets, 3C254, 3C275.1, 3C280, and 3C220
are extremely radio loud FRII radio sources with regular radio bridges. Their
properties span z=0.6-1.0, radio galaxies to quasars, and radio sizes 165-265
kpc.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
11:14:38.50 +40:37:20.00 3C254 ACIS-S NONE 30.00
12:56:57.10 +47:20:20.00 3C280 ACIS-S NONE 68.00
===================================================================================
Proposal Number: 02800388
Proposal Title: COOLING FLOWS WITHOUT CENTRAL RADIO SOURCES?
PI: JOHN STOCKE
Subject Category: CLUSTERS OF GALAXIES
Abstract: We propose to obtain a high spatial resolution temperature map of the
massive cooling flow cluster (CF) Abell 644 to determine the distribution of hot
and cool gas. In several (e.g. Hydra A), and perhaps in most, CFs some heating
source is in quasi-equilibrium with the cooling, producing the observed
high-density core to the intracluster medium (ICM). Cosmic ray heating of the ICM
by radio galaxies is the likely source, since {\bf almost all} CFs contain radio
galaxies. But, if so, what are the physical conditions in the cores of CFs
without luminous radio galaxies? Shocks indicating a merger as in A2142? Or a
confirmation of a massive CF? A644 is the {\bf only} nearby cluster which has an
apparent massive ($\dot{\rm{M}}>300$M$_{\odot}$yr$^{-1}$) CF but no radio
galaxy.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
08:17:25.40 -07:30:42.40 A644 ACIS-I NONE 30.00
===================================================================================
Proposal Number: 02800457
Proposal Title: THE HYDRODYNAMICS OF MERGING CLUSTERS OF GALAXIES
PI: LAURENCE DAVID
Subject Category: CLUSTERS OF GALAXIES
Abstract: We propose to observe two clusters of galaxies that are undergoing
major mergers (A2744 and A1758). These two clusters exhibit many of the classic
features of merging systems: both clusters have complex X-ray morphologies, A1758
has a NAT radio galaxy, and A2744 has a radio halo. While great advances have
been made in observational cosmology over the past decade, there is still much to
be learned about the impact on the basic components of clusters that occurs
during the hierarchical clustering process (i.e., the hot thermal gas, galaxies,
relativistic particles, and magnetic fields). Only by utilizing the high spatial
resolution of Chandra can we probe the large dynamic range of features induced
during the violent process of cluster merging.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
00:14:13.00 -30:22:40.00 A2744 ACIS-S NONE 25.00
13:32:43.20 +50:32:25.70 A1758 ACIS-S NONE 60.00
===================================================================================
Proposal Number: 02800458
Proposal Title: CHANDRA AND HST OBSERVATIONS OF THE BRIGHTEST CLUSTER LENSES
PI: STEVEN ALLEN
Subject Category: CLUSTERS OF GALAXIES
Abstract: We propose Chandra and Hubble Space Telescope observations of the four
X-ray brightest, cooling-flow clusters with bright gravitational arcs, newly
identified from the ROSAT XBACS/BCS lensing study. Our primary aim is to measure
the cluster mass profiles, using both the X-ray and lensing data. Secondary goals
include measurements of the X-ray gas/total mass ratio as a function of radius,
and the properties and ages of the cooling flows. Our targets are the X-ray
brightest, dynamically-relaxed lensing clusters not yet studied with Chandra or
HST and are amongst the most massive and X-ray luminous clusters known.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
23:51:39.10 -26:05:04.00 ABELL 2667 ACIS-S NONE 10.00
===================================================================================
Proposal Number: 02800465
Proposal Title: THE INTERACTION BETWEEN CLUSTER CENTRAL RADIO SOURCES AND
COOLING FLOWS
PI: CRAIG SARAZIN
Subject Category: CLUSTERS OF GALAXIES
Abstract: Central galaxies in rich clusters are sites of cluster cooling flows,
with large masses of gas cooling through X-ray temperatures. Many of these
galaxies host powerful radio sources. The Chandra image of Hydra-A shows a strong
interaction between X-ray gas and radio plasma. The X-ray gas may confine radio
lobes, deflect radio jets, and produce Faraday rotation. The radio lobes may
displace and compress the X-ray gas; this may lead to enhanced cooling and star
formation. We propose Chandra observations of three bright cooling flows with
strong radio sources to image the interaction region with the radio source, and
to determine the physical state of the X-ray gas. We will also derive the overall
cooling flow properties, including abundance gradients and excess absorption, if
any.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
01:52:46.50 +36:09:07.90 A262 ACIS-S NONE 28.00
03:17:57.70 -44:14:17.50 A3112 ACIS-S NONE 7.35
03:17:57.70 -44:14:17.50 A3112 ACIS-S NONE 17.65
===================================================================================
Proposal Number: 02800479
Proposal Title: THE ORIGIN OF X-RAY EMISSION FROM LOW VELOCITY DISPERSION GROUPS
PI: TREVOR PONMAN
Subject Category: CLUSTERS OF GALAXIES
Abstract: Low velocity dispersion ($\sigma$) groups have shallow potentials, and
should retain rather little hot gas if the intergalactic medium has been
preheated during the process of galaxy formation, as has been suggested recently.
However, some groups with low $\sigma$ have X-ray luminosities so high that the
$L$:$\sigma$ relation is observed to be {\it flatter} in groups than in clusters.
If this `excess' luminosity is truly diffuse gas, then the preheating model is in
serious difficulty. Alternatively, there could be new sources of X-ray emission
in these groups such as intergalactic shocks, which may be related to their
evolutionary state. We propose to image five of the most extreme low
$\sigma$/high $L_X$ groups with ACIS to find out.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
04:30:40.62 +00:39:58.24 NGC 1587 GROUP ACIS-I NONE 20.00
===================================================================================
Proposal Number: 02800530
Proposal Title: JET-INTRACLUSTER MEDIUM INTERACTIONS OF THE RADIO GALAXY 3C 129
PI: DANIEL HARRIS
Subject Category: CLUSTERS OF GALAXIES
Abstract: We propose 40 ksec Chandra observations of the cluster of galaxies 3C
129. This nearby (z=0.0208) system harbors the well studied head-tailed radio
galaxy 3C 129 with a long radio tail and the weaker radio source 3C 129.1. The
Chandra observations will allow us: (I) to derive unique information about the
structure and composition of jets of Active Galactic Nuclei (AGNs), based on a
detailed analysis of the pressure balance of the Intra Cluster Medium (ICM) and
the jet plasma; (II) to study the interaction of the jet with the ICM, i.e. to
image the leading bow shock and the compressed gas between bow shock and radio
jet, and to search for X-ray cavities where the radio structure expelled the ICM
gas. Furthermore, we will perform a detailed study of the ICM properties.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
04:49:08.00 +45:00:30.00 3C129 ACIS-S NONE 30.00
04:49:60.00 +45:02:30.00 3C129.1 ACIS-I NONE 10.00
===================================================================================
Proposal Number: 02800543
Proposal Title: GRAVITATIONAL POTENTIAL PROFILE IN A1060CLUSTER OF GALAXIES
PI: TAKAYA OHASHI
Subject Category: CLUSTERS OF GALAXIES
Abstract: We propose to study the precise structure of the gravitational
potential based on the high resolution X-ray observation of a relaxed non cD
cluster of galaxies. The proposed target, A1060, is one of the nearest clusters
and provides us with the best close-up view of the gas distribution in the center
of the cluster. This target is in the list of calibration targets but was never
observed.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
10:36:42.00 -27:31:39.00 A1060 ACIS-I NONE 30.00
===================================================================================
Proposal Number: 02800623
Proposal Title: GALAXY AND CLUSTER BUILDING AT Z = 2.4
PI: RAYMOND WHITE III
Subject Category: CLUSTERS OF GALAXIES
Abstract: We propose an exploratory Chandra observation of the richest
spectroscopically confirmed high-redshift (z>1) galaxy cluster, at z = 2.4. This
is the epoch of maximal star formation in galaxies, which is likely to be driving
protogalactic winds. Such winds are expected to generate or at least contaminate
intracluster gas. We are looking for evidence of diffuse X-ray emission from such
winds and/or nascent intracluster gas.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
17:14:14.21 +50:15:36.00 53W002 CLUSTER ACIS-S NONE 40.00
===================================================================================
Proposal Number: 02800732
Proposal Title: SPECTRAL-SPATIAL DIAGNOSTICS OF THE MOST LUMINOUS X-RAY CLUSTER
OF GALAXIES WITH THE HETG
PI: STEVEN KAHN
Subject Category: CLUSTERS OF GALAXIES
Abstract: We propose a 100 ks observation of RXJ 1347.5-1145, the most luminous
X-ray cluster of galaxies with the HETG. RXJ 1347.5-1145 is a compact high
redshift (0.451) X-ray cluster. By using the dispersed spectrum of the HETG and
the spatially resolved zero-order image, we plan to measure its cooling flow and
detect a number of emission lines of RXJ 1347.5-1145. The observed
spectral-spatial properties will determine the dynamics of X-ray gas early in the
history of cluster formation.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
13:47:31.00 -11:45:11.00 RXJ 1347.5-1145 ACIS-S HETG 100.00
===================================================================================
Proposal Number: 02800754
Proposal Title: THE INTRAGROUP MEDIUM: DISTRIBUTION OF HEAVY ELEMENTS AND
INTERACTION WITH RADIO JETS
PI: JAN VRTILEK
Subject Category: CLUSTERS OF GALAXIES
Abstract: Most galaxies in the present-day Universe are in groups and poor
clusters. Groups are the building blocks from which clusters form, and they
accordingly occupy an important niche in the continuum between isolated galaxies
and rich clusters. We here propose to exploit the high X-ray brightnesses and
relative sparseness of the NGC 383 and NGC 741 groups and their very different
radio jet morphologies to understand the metallicity distribution of the
intragroup gas, to test whether any abundance variations are associated with
individual galaxies, and to study the interactions between the intragroup medium
and the radio jets, at a level of detail not possible prior to the availability
of Chandra's high angular resolution.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
01:56:21.00 +05:37:44.20 NGC 741 GROUP ACIS-S NONE 31.00
===================================================================================
Proposal Number: 02800766
Proposal Title: CHANDRA OBSERVATIONS OF MS0440.5+0204 & MS0839.9+2938: COOLING
FLOW CLUSTERS IN FORMATION?
PI: BRIAN MCNAMARA
Subject Category: CLUSTERS OF GALAXIES
Abstract: We propose to observe two redshift z~0.2 clusters, MS0839.9+2938 and
MS0440+0204, discovered as bright X-ray sources in the Einstein Medium
Sensitivity Survey. The cluster cores are structured in the X-ray and optical
bands, and they harbor large cooling flows. Their central cluster galaxies
contain luminous nebular emission systems, active star formation, and strong
radio sources. Using the Chandra data, we will determine whether the large
discrepancies between the X-ray cooling rates and optical star formation rates
can be reconciled, and we will test the hypothesis that cooling flows form as
cool, dense groups accrete into massive clusters.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
08:42:55.90 +29:27:27.00 MS0839.9+2938 ACIS-S NONE 30.00
===================================================================================
Proposal Number: 02800802
Proposal Title: A DIFFERENTIAL X-RAY GUNN-PETERSON TEST USING A GIANT CLUSTER
FILAMENT
PI: MAXIM MARKEVITCH
Subject Category: CLUSTERS OF GALAXIES
Abstract: We propose a measurement of the absolute density of heavy elements in
intercluster space via the X-ray Gunn-Peterson test. It makes use of the unique
filament of galaxy clusters spanning over 700 Mpc along the line of sight. We
will compare the oxygen edge absorption toward the 4 closest and most distant
clusters in this filament. The absorption will be determined by the same
instrument and through the same Galactic column, hence the differential test.
This will be a completely new measurement with important cosmological
implications, since the intercluster gas may be the largest reservoir of baryonic
matter in the Universe, but even its existence has not been proven
observationally at low z. Two clusters of our sample are being observed as GTO
targets and we propose the remaining two.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
23:11:37.20 -21:44:27.60 A2550 ACIS-S NONE 60.00
23:13:01.40 -21:38:02.40 A2556 ACIS-S NONE 20.00
===================================================================================
Proposal Number: 02800845
Proposal Title: A COMPLETE X-RAY CLUSTER SAMPLE AT Z > 0.8
PI: SPENCER STANFORD
Subject Category: CLUSTERS OF GALAXIES
Abstract: We propose to observe three X-ray selected clusters of galaxies from
the RDCS, one at z = 1.1 and two at z ~ 0.8. In conjunction with other data
already being obtained by Chandra and XMM, we would then have luminosity and
temperature measurements for a complete sample of 8 clusters at z > 0.8. We will
produce the first temperature function at these high redshifts. Using Chandra's
high angular resolution, we can minimize the contamination from point sources, a
serious problem at faint flux limits, as well as study the spatial properties of
the intra-cluster medium. With this combination of temperatures, luminosities,
and spatial profiles, we will both probe the cluster mass function of the
universe at high redshift and study the thermal history of the intra-cluster
medium.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
09:10:45.41 +54:22:05.00 RX J0910+5422 ACIS-I NONE 76.00
09:10:45.41 +54:22:05.00 RX J0910+5422 ACIS-I NONE 124.00
13:17:21.84 +29:11:17.00 RX J1317.4+2911 ACIS-I NONE 115.00
13:50:46.10 +60:07:09.00 RX J1350.0+6007 ACIS-I NONE 60.00
===================================================================================
Proposal Number: 02800786
Proposal Title: SURVEY OF HARD POINT SOURCES IN GROUPS OF GALAXIES
PI: YASUSHI FUKAZAWA
Subject Category: CLUSTERS OF GALAXIES
Abstract: We detected excess diffuse-like hard X-ray emission in addition to
thermal emission from several groups of galaxies with ASCA. If it is truly
diffuse, it is indicated that high energy particles exist in the intragroup
space. Existence of such particles is interesting in terms of heating and
acceleration in clusters of galaxies, and moreover gives impacts on the dynamics
in intracluster spaces. To confirm whether the hard X-ray emission in groups is
truly diffuse or not, we propose to observe 6 nearby groups of galaxies to
constrain the flux contribution of hard point sources, by utilizing Chandra
imaging capability.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
12:52:45.00 -09:07:60.00 HCG62_NW ACIS-I NONE 10.00
13:20:16.00 +33:09:04.00 RGH80 ACIS-I NONE 10.00
===================================================================================
Proposal Number: 02808039
Proposal Title: REOBSERAVTION OF PKS0745-191
PI: ANDREW FABIAN
Subject Category: CLUSTERS OF GALAXIES
Abstract: GT observation of this cluster has high background with many flares.
Plots of this background have been shown and discussed, by email, with Harvey
Tananbaum.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
07:47:31.20 -19:17:39.00 PKS0745-191 ACIS-S NONE 20.00
***********************************************************************************
EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS
--------------------------------------------------
===================================================================================
Proposal Number: 02900068
Proposal Title: HDF NORTH SURVEY
PI: GORDON GARMIRE
Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
12:36:49.40 +62:12:58.00 HDF NORTH ACIS-I NONE 10.00
12:36:49.40 +62:12:58.00 HDF NORTH ACIS-I NONE 92.00
12:36:49.40 +62:12:58.00 HDF NORTH ACIS-I NONE 169.00
===================================================================================
Proposal Number: 02900078
Proposal Title: LOCKMAN HOLE SHALLOW SURVEY
PI: STEPHEN MURRAY
Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS
Abstract: A series of short ACIS-I pointings in the region of the Lockman Hole
provides about a 1 square degree area of sky that will be surveyed to a flux
limit of about 5E-15 ergs/cm**2/sec using the ACIS-I camera. With existing
optical data, and follow up spectrocsopy a flux limited sky survey 10 times
deeper than the ROSAT survey will be obtained.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
10:49:04.00 +57:42:32.00 LOCKMAN HOLE #14 ACIS-I NONE 5.00
10:49:06.00 +57:27:32.00 LOCKMAN HOLE #9 ACIS-I NONE 5.00
10:49:07.00 +57:12:32.00 LOCKMAN HOLE #4 ACIS-I NONE 5.00
10:50:56.00 +57:57:32.00 LOCKMAN HOLE #19 ACIS-I NONE 5.00
10:50:57.00 +57:27:32.00 LOCKMAN HOLE #10 ACIS-I NONE 5.00
10:50:57.00 +57:42:32.00 LOCKMAN HOLE #15 ACIS-I NONE 5.00
10:50:58.00 +57:12:32.00 LOCKMAN HOLE #5 ACIS-I NONE 5.00
10:50:59.00 +56:57:32.00 LOCKMAN HOLE #1 ACIS-I NONE 5.00
10:52:49.00 +56:57:32.00 LOCKMAN HOLE #2 ACIS-I NONE 5.00
10:52:49.00 +57:12:32.00 LOCKMAN HOLE #6 ACIS-I NONE 5.00
10:52:49.00 +57:27:32.00 LOCKMAN HOLE #11 ACIS-I NONE 5.00
10:52:49.00 +57:42:32.00 LOCKMAN HOLE #16 ACIS-I NONE 5.00
10:52:49.00 +57:57:32.00 LOCKMAN HOLE #20 ACIS-I NONE 5.00
10:54:39.00 +56:57:32.00 LOCKMAN HOLE #3 ACIS-I NONE 5.00
10:54:41.00 +57:27:32.00 LOCKMAN HOLE #12 ACIS-I NONE 5.00
10:54:41.00 +57:42:32.00 LOCKMAN HOLE #17 ACIS-I NONE 5.00
10:54:42.00 +57:57:32.00 LOCKMAN HOLE #21 ACIS-I NONE 5.00
10:55:34.00 +57:42:32.00 LOCKMAN HOLE #18 ACIS-I NONE 5.00
10:55:40.00 +57:12:32.00 LOCKMAN HOLE #7 ACIS-I NONE 5.00
10:56:31.00 +57:12:32.00 LOCKMAN HOLE #8 ACIS-I NONE 5.00
10:56:32.00 +57:27:32.00 LOCKMAN HOLE #13 ACIS-I NONE 5.00
===================================================================================
Proposal Number: 02900121
Proposal Title: LYMAN ALPHA BLOBS AND A CLUSTER AT Z=3.09
PI: GORDON GARMIRE
Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
22:17:32.40 +00:13:09.90 PROTO CLUSTER ACIS-S NONE 79.00
===================================================================================
Proposal Number: 02900084
Proposal Title: DIFFERENTIAL X-RAY GUNN-PETERSON TEST
PI: STEPHEN MURRAY
Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS
Abstract: We will try to detect heavy elements in intercluster space via the
X-ray Gunn-Peterson test, making use of the filament of clusters spaning over 700
Mpc along the line of sight. The targets are clusters located at the near and far
ends of the filament.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
23:07:36.00 -22:41:44.90 A2534 ACIS-S NONE 27.20
23:07:36.00 -22:41:44.90 A2534 ACIS-S NONE 62.80
23:12:19.30 -21:29:52.40 A2554 ACIS-S NONE 20.00
===================================================================================
Proposal Number: 02900126
Proposal Title: CHANDRA OBSERVATIONS OF THE DEEP ISO FIELD
PI: RICHARD MUSHOTZKY
Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS
Abstract: Recent Chandra observations have shown a significant fraction of very
faint optical counterparts to faint Chandra sources. The nature of these objects
is at present unknown, but they could be highly obscured objects. To test this
hypothesis we will observe the largest solid angle deepest SCUBA and ISO 170
micron field. The aim is to cover a reasonable solid angle with ACIS-I and to
cross correlate this field with ISO and SCUBA data. Based on our 13hr field
observations the hard x-ray log N-log S flattens at ~1E-14 ergs/cm2/sec. This
corresponds, roughly, to 4E-4 ACIS-I cts/sec. To reach this limit requires a 25ks
exposure for 10 photons.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
10:33:22.00 +57:37:25.00 ISO NW #2 ACIS-I NONE 44.00
10:34:02.10 +57:46:25.00 ISO NW #1 ACIS-I NONE 80.00
10:34:38.00 +57:37:25.00 ISO NW #3 ACIS-I NONE 44.00
===================================================================================
Proposal Number: 02900196
Proposal Title: THE CHANDRA DEEP SURVEY OF THE HUBBLE DEEP FIELD NORTH (HDF-N)
AREA
PI: WILLIAM BRANDT
Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS
Abstract: We propose to extend the Chandra X-ray survey of the HDF-N and its
vicinity with a 475 ks exposure; this will give 1 Ms of total coverage on this
field and will fulfill one of Chandra's central design goals. We should remain
photon limited to 1 Ms and will probe the X-ray Universe more than four times
deeper than any observation to date. We should resolve essentially all of the
X-ray background from 0.5-8 keV and will study obscured and high-redshift active
galaxies, advection dominated sources, starbursts, X-ray binaries, clusters and
groups, and diffuse X-ray emission. The HDF-N field is an ideal one for
multiwavelength follow-up studies due to the enormous database already in place.
All data are to be placed in the public archive immediately and we will request
no GO science funding.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
12:36:49.40 +62:12:58.00 HDF-N ACIS-I NONE 62.40
12:36:49.40 +62:12:58.00 HDF-N ACIS-I NONE 64.60
12:36:49.40 +62:12:58.00 HDF-N ACIS-I NONE 69.20
12:36:49.40 +62:12:58.00 HDF-N ACIS-I NONE 130.80
12:36:49.40 +62:12:58.00 HDF-N ACIS-I NONE 168.00
===================================================================================
Proposal Number: 02900307
Proposal Title: A COMBINED CHANDRA/XMM ATTACK ON THE ASTROPHYSICS OF THE HARD
X-RAY BACKGROUND.
PI: IAN MCHARDY
Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS
Abstract: We propose a CHANDRA survey, of the minimum exposure required to
provide arcsecond positions and hence unambiguous identifications for the ~350
sources with high quality X-ray spectra in our 400ksec guaranteed time deep XMM
survey. The very powerful combination of XMM spectra with CHANDRA positions,
coupled with extensive observations (mostly completed) in other wavebands will
enable us to understand the astrophysics of the hard X-ray background; ie do the
contributors have absorbed spectra, or intrinsically flat spectra? how do QSO
spectra, including any black body components, evolve? what is the X-ray emission
mechanism of the optically inactive galaxies and of the narrow emission line
galaxies? how do the temperatures of clusters evolve (a strong cosmological
diagnostic)?
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
13:34:14.60 +37:58:55.74 XMM 13HR - FIELD 1 ACIS-I NONE 30.00
13:34:20.45 +37:49:35.69 XMM 13HR - FIELD 4 ACIS-I NONE 30.00
13:35:01.98 +38:00:04.52 XMM 13HR - FIELD 3 ACIS-I NONE 30.00
13:35:07.73 +37:50:44.45 XMM 13HR - FIELD 2 ACIS-I NONE 30.00
===================================================================================
Proposal Number: 02900395
Proposal Title: A DEEP X-RAY SURVEY FOR ACTIVE GALACTIC NUCLEI IN THE EXTREMELY
RED GALAXY POPULATION
PI: DAVID THOMPSON
Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS
Abstract: We seek to understand the nature of the Extremely Red Galaxy (ERG)
population through a study of a complete sample of 29 ERGs (with (R-K) >= 6mag
and K =< 19mag). X-ray observations will answer two important questions: Do ERGs
contain a significant number of dust-shrouded active galactic nuclei? Are ERGs
signposts pointing to high-redshift clusters of galaxies? Chandra is sensitive
enough to detect heavily obscured Seyfert 1 nuclei and QSOs at redshifts above
one, as well as hot intracluster gas from high-redshift clusters.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
01:47:36.20 +02:20:03.30 CADIS 01H FIELD ACIS-I NONE 30.00
===================================================================================
Proposal Number: 02900468
Proposal Title: DIRECT DETECTION OF COSMOLOGICAL DUST
PI: FREDERIK PAERELS
Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS
Abstract: Detection of an X-ray scattering halo may be the only direct and
unambiguous way to reveal dust in the intergalactic medium. Somewhat
surprisingly, detecting cosmologically interesting amounts of dust should not be
difficult with Chandra. We propose to search for a halo in the image of the soft
X-ray bright, distant QSO 1508+5714 (z = 4.30). We can easily detect the amount
of dust that could mimic the effect of a non-zero cosmological constant on the
Hubble diagram of SNe Ia. Non-detection should settle this issue definitively. As
a byproduct, we will obtain constraints on the history of dust from global star
formation (or the other way around).
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
15:10:02.90 +57:02:43.40 QSO 1508+5714 ACIS-S NONE 100.00
===================================================================================
Proposal Number: 02900478
Proposal Title: THE NATURE OF NARROW-LINE, FIR-LUMINOUS, X-RAY GALAXIES
PI: TOM SHANKS
Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS
Abstract: We propose to make Chandra ACIS-S observations of 10 ROSAT sources
which have been identified as Narrow-Line X-ray galaxies; strong candidates for
explaining a significant fraction of the X-ray Background. 7(/14) of these
galaxies have been detected by ISO at 60-200 microns, compared to only 1/6 of a
QSO control sample, suggesting that these galaxies contain more 30
***********************************************************************************
GALACTIC DIFFUSE EMISSION AND SURVEYS
--------------------------------------------------
===================================================================================
Proposal Number: 02910585
Proposal Title: CHANDRA SURVEY OF THE GALACTIC RIDGE AROUND THE MILKY WAY CENTER
PI: Q. DANIEL WANG
Subject Category: GALACTIC DIFFUSE EMISSION AND SURVEYS
Abstract: We propose an X-ray survey of a 2.4x0.7 square deg field around the
Galactic center, using a set of Chandra ACIS pointings. With the unprecedented
spatial and spectral resolutions as well as the broad energy coverage, this
survey will provide an invaluable database for studying X-ray pulsars, binaries,
supernova remnants, and superbubbles as well as many unique features observed in
the field. The resultant exquisite X-ray images, complemented by an existing
large-scale ROSAT PSPC mapping in soft X-ray, will allow for direct comparison
with similar maps in radio and infrared. In particular, the survey will provide
an excellent opportunity to determine the origin of the well-known Galactic ridge
X-ray emission.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
17:42:30.91 -29:39:52.20 GCS 30 ACIS-I NONE 12.00
17:42:59.23 -29:29:55.32 GCS 27 ACIS-I NONE 12.00
17:43:16.75 -29:46:01.56 GCS 29 ACIS-I NONE 12.00
17:43:27.46 -29:19:58.08 GCS 24 ACIS-I NONE 12.00
17:43:45.02 -29:36:03.96 GCS 26 ACIS-I NONE 12.00
17:43:55.61 -29:10:00.48 GCS 21 ACIS-I NONE 12.00
17:44:02.66 -29:52:09.84 GCS 28 ACIS-I NONE 12.00
17:44:13.20 -29:26:06.00 GCS 23 ACIS-I NONE 12.00
17:44:23.64 -29:00:02.52 GCS 18 ACIS-I NONE 12.00
17:44:30.91 -29:42:11.88 GCS 25 ACIS-I NONE 12.00
17:44:41.30 -29:16:08.04 GCS 20 ACIS-I NONE 12.00
17:44:51.60 -28:50:03.84 GCS 15 ACIS-I NONE 12.00
17:44:59.04 -29:32:13.20 GCS 22 ACIS-I NONE 12.00
17:45:09.29 -29:06:09.36 GCS 17 ACIS-I NONE 12.00
17:45:19.46 -28:40:05.16 GCS 12 ACIS-I NONE 12.00
17:45:27.07 -29:22:14.52 GCS 19 ACIS-I NONE 12.00
17:45:37.20 -28:56:10.32 GCS 14 ACIS-I NONE 12.00
17:45:47.23 -28:30:06.12 GCS 9 ACIS-I NONE 12.00
17:45:55.03 -29:12:15.12 GCS 16 ACIS-I NONE 12.00
17:46:05.02 -28:46:10.92 GCS 11 ACIS-I NONE 12.00
17:46:14.93 -28:20:06.72 GCS 6 ACIS-I NONE 12.00
17:46:22.90 -29:02:15.36 GCS 13 ACIS-I NONE 12.00
17:46:32.74 -28:36:11.16 GCS 8 ACIS-I NONE 12.00
17:46:42.53 -28:10:06.60 GCS 3 ACIS-I NONE 12.00
17:46:50.66 -28:52:15.60 GCS 10 ACIS-I NONE 12.00
17:47:00.38 -28:26:11.04 GCS 5 ACIS-I NONE 12.00
17:47:18.34 -28:42:15.12 GCS 7 ACIS-I NONE 12.00
17:47:27.94 -28:16:10.56 GCS 2 ACIS-I NONE 12.00
17:47:45.94 -28:32:14.64 GCS 4 ACIS-I NONE 12.00
17:48:13.44 -28:22:13.80 GCS 1 ACIS-I NONE 12.00
===================================================================================
Proposal Number: 02910627
Proposal Title: THE MOLECULAR FRACTION AND ABUNDANCES OF GAS IN THE GALAXY
PI: JOHN ARABADJIS
Subject Category: GALACTIC DIFFUSE EMISSION AND SURVEYS
Abstract: Molecular absorption line studies and X-ray absorption observations
toward AGN indicate that molecular gas is as abundant as neutral atomic gas in
the Solar vicinity. At larger Galactic radii, H2 exceeds HI in some locations,
and if this is generally true, it implies a dramatic revision in the picture of
neutral gas in disk galaxies. To determine if H2 dominates the ISM at large
radii, we propose to measure the X-ray absorption column toward AGNs projected
behind the outer part of the Galactic disk, which is expected to be about
1E22/cm2, to an accuracy of 3-7%. Subtracting off the 21 cm column yields an H2
measurement of unprecedented accuracy. These high columns will also allow us to
measure the abundances of O, Fe, and Ne to high accuracy, without the usual
systematic uncertainties.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
02:44:57.80 +62:28:10.50 4U 0241+61 ACIS-S LETG 40.00
===================================================================================
Proposal Number: 02910799
Proposal Title: ORIGIN OF THE DIMMEST X-RAY SOURCES ON THE GALACTIC PLANE AND
GALACTIC DIFFUSE EMISSION
PI: KEN EBISAWA
Subject Category: GALACTIC DIFFUSE EMISSION AND SURVEYS
Abstract: We have carried out AO1 Galactic plane deep survey (100 ksec), and
discovered more than 50 unidentified sources in 3-8 keV down to the flux level
3e-15 erg/s/cm2. The log N-log S analysis suggests significant parts of these
source are extragalactic, while some of the sources must be Galactic as they
exhibit iron emission lines. We could not resolve the Galactic Ridge X-ray
emission (GRXE) into point sources, which suggest the GRXEis truly diffuse, and
there will not be significant number of dimmer point sources in our Galaxy. To
further investigate origin of the dimmest X-ray sources on the Galactic plane, we
will expand our deep survey toward adjacent fields for smaller and larger |b|, so
that we can investigate |b| dependence of the source distribution. and energy
spectra.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
18:43:32.10 -03:54:44.80 GALACTIC PLANE 1 ACIS-I NONE 100.00
===================================================================================
Proposal Number: 02910818
Proposal Title: A SURVEY OF X-RAY SELECTED SNR CANDIDATES
PI: MARTIN WEISSKOPF
Subject Category: GALACTIC DIFFUSE EMISSION AND SURVEYS
Abstract: We propose to survey the 11 brightest, unstudied, RASS-detected SNR
candidates that fit within the ACIS-I field of view. We will use the 3 to 30 ks
exposures to determine if the objects are supernova remnants, and if so, measure
their spectral characteristics (temperature, abundance), details of their
morphology (angular size) and their expansion velocity. We will search the images
for for an associated compact object and, depending on the number of recorded
counts, determine the spectrum and search for time variability. This study will
significantly enhance the known sample of SNR that show weak radio emission and
provide insight into the structure and composition of the ISM. Follow-up radio
continuum and linear polarization observations, and optical studies will be
performed.
Grat- Exp.
R.A. Dec. (J2000) Target Name Det. ing Time
-----------------------------------------------------------------------------------
00:28:17.00 +63:43:57.00 1RXSJ002816.7+634357 ACIS-I NONE 14.00
10:40:47.00 -70:47:13.00 1RXSJ104047.4-704713 ACIS-I NONE 12.80
16:14:11.00 -63:06:57.00 1RXSJ161411.3-630657 ACIS-I NONE 33.40
17:35:47.00 -07:21:15.00 1RXSJ173546.7-072115 ACIS-I NONE 7.00
17:56:34.00 -21:59:37.00 1RXSJ175634.8-215937 ACIS-I NONE 3.00
19:55:41.00 +32:05:46.00 1RXSJ195541.5+320546 ACIS-I NONE 10.00
