Chandra X-Ray Observatory
	(CXC)

Accepted Cycle 9 Observing Proposals

SOLAR SYSTEM STARS AND WD WD BINARIES AND CV BH AND NS BINARIES SN, SNR AND ISOLATED NS NORMAL GALAXIES ACTIVE GALAXIES AND QUASARS CLUSTERS OF GALAXIES EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS GALACTIC DIFFUSE EMISSION AND SURVEYS
Proposal Number Subject Category Type PI Name Title
09100452 SOLAR SYSTEM GO Damian Christian High Resolution Imaging and Spectroscopy of 8P/Tuttle
09200028 STARS AND WD GTO Gordon Garmire Search for triggered star formation in the unique bright rimmed cloud 4
09200053 STARS AND WD GTO Gordon Garmire ACIS Mapping Observation of W75N/DR21
09200063 STARS AND WD GTO Peter Predehl X-Raying the debris disk of AU Mic
09200064 STARS AND WD GTO Claude Canizares The HETG Orion Legacy Project: The Periastron Passage of Theta1 OriC's Massive Secondary
09200065 STARS AND WD GTO Claude Canizares The HETG Orion Legacy Project: PMS Stellar Studies of the Orion Trapezium Cluster
09200079 STARS AND WD GO Steven Pravdo Protostars and Jets in Cep A
09200137 STARS AND WD GO Brian Wood Resolving the Xi Boo Binary
09200153 STARS AND WD GO Joel Kastner BP Psc: Chandra Takes a Close Look at a Pre-Main Sequence Star-Disk-Jet System
09200162 STARS AND WD GO Jan Robrade Are the Herbig Ae star HR 5999 and the peculiar A-type star HR 6000 X-ray emitter?
09200198 STARS AND WD GO Beate Stelzer The coronae of ultracool dwarfs: Simultaneous X-ray and radio monitoring
09200200 STARS AND WD GO Marc Audard Surveying Magnetic Activity in L and T Brown Dwarfs
09200214 STARS AND WD GO Leisa Townsley NGC 3576: Spontaneous or Triggered Formation of a Giant HII Region
09200253 STARS AND WD GO Thomas Ayres The Further Fainting of Alpha Cen A
09200255 STARS AND WD GO Stephen Skinner A Survey of X-ray Emission from Nitrogen-rich Wolf-Rayet Stars
09200257 STARS AND WD GO Andrew Pollock The clear view of WR140's collisionless shocks through the companion O-star wind
09200270 STARS AND WD GO Thomas Ayres Filling in the Coronal Graveyard
09200326 STARS AND WD GO John Gizis Search for X-Ray Emission from TW Hya Association Brown Dwarfs
09200357 STARS AND WD GO Yohko Tsuboi Survey of Class 0 Protostars in the Smallest Clouds 'Bok Globules'
09200403 STARS AND WD GO Marcel Agueros The Coolest X-ray Emitting White Dwarfs?
09200488 STARS AND WD GO Edo Berger The Full Picture of Magnetic Activity in Ultracool Dwarfs: Simultaneous Observations of Coronae and Chromospheres
09200532 STARS AND WD GO Marc Gagne X-raying the Giant HII Region G305
09200535 STARS AND WD GO Cara Rakowski An Emerging Class of Hot Emission Line Stars: HD 119682
09200536 STARS AND WD TOO David Weintraub ToO Studies with CXO of Pre-Main Sequence Stars Undergoing Optical Outbursts
09200559 STARS AND WD GO Mario Guarcello Effects of massive star radiation on circumstellar disks evolution in the Eagle Nebula
09200564 STARS AND WD GO Scott Wolk X-ray and Radio Imaging of the Protostar Complex Adjacent to IC 348
09200584 STARS AND WD GO Michael Corcoran Shock Dynamics in Eta Carinae Approaching the 2009 Periastron Passage: A Twisted Tail
09200644 STARS AND WD GO Rachel Osten Polar Exploration and Coronal Structure in the Active Binary HR 5110
09200659 STARS AND WD GO Marc Audard Catching the Post-Outburst State of the Erupting Star V1118 Ori
09200673 STARS AND WD GO Lidia Oskinova Can different elements move with different velocities in a radiatively driven stellar wind?
09200690 STARS AND WD GO Jon Miller The Evolution of X-ray Emission in the Planet-Forming Era
09200730 STARS AND WD GO Carol Grady X-ray Emission from a 7 Myr Old, Accreting Herbig Ae star and its Jet: MWC 480
09200763 STARS AND WD GO Alexander Brown X-RAY AND UV PHOTOIONIZATION AND PHOTOEXCITATION OF PRE-MAIN-SEQUENCE STAR TRANSITIONAL DISKS
09200803 STARS AND WD GO Steven Saar A detailed investigation of coronal/magnetic and rotational changes in cool stars using NGC 3532
09200839 STARS AND WD GO You-Hua Chu X-ray Emission from the Hot White Dwarf KPD 0005+5106: Corona or Accretion?
09200905 STARS AND WD GO Gregory Herczeg Evaluating the Role of Photoevaporation in Protoplanetary Disk Dispersal
09200907 STARS AND WD GO Lee Hartmann A Hard Look at Stellar Disks at the Epoch of Planet Formation
09200909 STARS AND WD GO Nuria Calvet Probing the Gas in the Planet Forming Regions of Protoplanetary Disks
09300001 WD BINARIES AND CV GO Wolfgang Pietsch Resolving short supersoft source states of optical novae in the core of M31
09300101 WD BINARIES AND CV LP David Pooley A Chandra Legacy Survey of Dynamically Active Globular Clusters
09300413 WD BINARIES AND CV GO Randall Smith The Symbiotic Star SS73 17: What Generates the Hard X-rays?
09300509 WD BINARIES AND CV TOO Sumner Starrfield Multiwavelength Observations of Two Bright Dust Forming CO Novae: V2362 Cyg and V1280 Sco
09300602 WD BINARIES AND CV GO Margarita Karovska X-ray Jets Activity in the Symbiotic System CH Cyg
09300685 WD BINARIES AND CV TOO Koji Mukai The Nature of the Soft Component in the Symbiotic Star, CH Cygni
09400002 BH AND NS BINARIES GO Joern Wilms Joint XMM-Newton/Chandra/RXTE Observations of Dips in Cyg X-1
09400003 BH AND NS BINARIES GO Rudy Wijnands Monitoring Observations of the Galactic Center Region
09400014 BH AND NS BINARIES GTO/ALTERNATE Mariano Mendez Chandra follow-up of a weak persistent source found in INTEGRAL maps: IGR J17204-3554
09400018 BH AND NS BINARIES GTO/TOO Mariano Mendez Chandra follow-up of weak persistent sources found in INTEGRAL maps
09400019 BH AND NS BINARIES GTO Mariano Mendez Chandra follow-up of a weak persistent source found in INTEGRAL maps
09400020 BH AND NS BINARIES GTO Mariano Mendez The Galactic Bulge Survey: categorising the plethora of faint X-ray sources in the Galactic Bulge
09400055 BH AND NS BINARIES GTO Claude Canizares HETG Observations of the Accretion Disk Corona Source X1822-371
09400117 BH AND NS BINARIES TOO David Pooley Transient LMXBs in Globular Clusters: More Numerous Than We Thought?
09400125 BH AND NS BINARIES TOO Stephane Corbel X-Ray Jets in Microquasars
09400192 BH AND NS BINARIES GO Edward Cackett Crustal cooling in quiescent neutron stars
09400196 BH AND NS BINARIES GO Peter Jonker The Galactic Bulge Survey: categorising the plethora of faint X-ray sources in the Galactic Bulge
09400208 BH AND NS BINARIES TOO Peter Jonker Following a black hole candidate X-ray transient to quiescence
09400224 BH AND NS BINARIES TOO Yoshihiro Ueda High Resolution Spectroscopy of GRS 1915+105 in the 'Soft' State
09400231 BH AND NS BINARIES TOO Isabelle Grenier ToO observation of a new bright transient discovered by GLAST and Swift in the Galactic plane
09400314 BH AND NS BINARIES GO Norbert Schulz Photoionization in the Microquasar Circinus X-1
09400351 BH AND NS BINARIES TOO Nathalie Degenaar Crust cooling of HETE J1900.1-2455 and Swift J1626.6-5156
09400355 BH AND NS BINARIES TOO Rudy Wijnands Quasi-persistent neutron-star X-ray binaries in quiescence
09400380 BH AND NS BINARIES TOO DIEGO ALTAMIRANO First Chandra observation of the ultra-compact X-ray binary 4U~1850--087 during its high luminosity state
09400397 BH AND NS BINARIES GO Rudy Wijnands Monitoring observations of the Galactic Center region
09400409 BH AND NS BINARIES GO Marc Klein-Wolt Faint persistent X-ray sources in the Galactic Bulge
09400414 BH AND NS BINARIES TOO Adamantia Paizis INVESTIGATING NEW INTEGRAL SOURCES WITH CHANDRA
09400441 BH AND NS BINARIES GO Rudy Wijnands Chandra observations of an engimatic class of faint accreting slow pulsators
09400498 BH AND NS BINARIES TOO Paolo Soleri TOO observation of the microquasar GRS 1915+105 in quiescence
09400544 BH AND NS BINARIES TOO Deepto Chakrabarty Precise Localization of Neutron Star Soft X-ray Transients
09400550 BH AND NS BINARIES TOO Jon Miller High Resolution Spectroscopy of a Black Hole Transient
09400622 BH AND NS BINARIES GO Craig Heinke The Nature of the Intermediate-Luminosity X-ray Sources in Globular Clusters
09400640 BH AND NS BINARIES TOO DIEGO ALTAMIRANO Observations during the rare dips observed on the X-ray binary SLX 1735--269
09400681 BH AND NS BINARIES TOO Tod Strohmayer Understanding the nature of high inclination low mass X-ray binaries: broad-band and line spectra from A1744-361
09400783 BH AND NS BINARIES TOO Jeroen Homan From Super-Eddington to zero: following a Z source into quiescence
09400813 BH AND NS BINARIES GO John Tomsick Localization and Spectra of INTEGRAL-Selected Sources in the Galactic Plane
09400831 BH AND NS BINARIES TOO Johannes in 't Zand Spectroscopy of a bright burst from 4U 1812-12
09400910 BH AND NS BINARIES TOO Kevin Hurley Spitzer-Chandra ToO Observations of a Short Duration GRB
09500023 SN, SNR AND ISOLATED NS GTO/TOO Mariano Mendez Investigating possible magnetar-like outburst behaviour from high-B radio pulsars and XDINSs
09500026 SN, SNR AND ISOLATED NS GTO Gordon Garmire Galactic Supernova Remnant G272.2-3.2
09500030 SN, SNR AND ISOLATED NS GTO Gordon Garmire Snap-shot survey of potential GeV and TeV pulsars
09500037 SN, SNR AND ISOLATED NS GTO Stephen Murray High Resolution HRC Imaging of Supernova Remnant 1987A
09500130 SN, SNR AND ISOLATED NS GO Dirk Grupe The extreme late-time light curve of GRB 060729
09500172 SN, SNR AND ISOLATED NS GO Vyacheslav Zavlin The 'black-widow' pulsar in X-rays
09500216 SN, SNR AND ISOLATED NS GO David Pooley Chandra Observations of Young, Energetic Supernovae
09500239 SN, SNR AND ISOLATED NS GO Sangwook Park A Deep Chandra Observation of SMC SNR 0104-72.3
09500297 SN, SNR AND ISOLATED NS GO Jules Halpern Timing PSR J1852+004 in Supernova Remnant Kes 79: Plan B
09500337 SN, SNR AND ISOLATED NS TOO David Pooley Chandra Observations of New X-ray Supernovae
09500381 SN, SNR AND ISOLATED NS GO Chi-Yung Ng Phase-resolved Imaging of Compact Structures in a Pulsar Bow Shock
09500446 SN, SNR AND ISOLATED NS GO Robert Petre A Measurement of the Expansion Rate of SN 1006
09500471 SN, SNR AND ISOLATED NS LP Patrick Slane A Deep Chandra Observation of G54.1+0.3
09500479 SN, SNR AND ISOLATED NS TOO Marco Feroci The X-ray Afterglow of a Gamma-ray Burst detected and localized with the AGILE gamma- and X-ray detectors
09500556 SN, SNR AND ISOLATED NS GO R gis Terrier Determining the nature of the quasi-pointlike TeV source HESS J1858+020
09500565 SN, SNR AND ISOLATED NS GO Daniel Patnaude Investigating the X-ray Variability of Cassiopeia A
09500572 SN, SNR AND ISOLATED NS GO Mallory Roberts Completing a Small Chandra Survey of Hard X-ray Sources in Gamma-Ray Error Boxes
09500577 SN, SNR AND ISOLATED NS GO Kent Wood A Search for X-ray Pulsations from Rotation-Powered Millisecond Pulsars
09500603 SN, SNR AND ISOLATED NS GO Una Hwang Shock Interactions in the Supernova Remnant IC443
09500615 SN, SNR AND ISOLATED NS GO Stefan Immler The Peculiar X-Ray Evolution of Supernovae 1978K, 1979C and 1993J
09500627 SN, SNR AND ISOLATED NS TOO Peter Woods ToO Observations of Soft Gamma Repeaters
09500628 SN, SNR AND ISOLATED NS GO Glenn Allen Measuring the Expansion Rate of G266.2-1.2
09500752 SN, SNR AND ISOLATED NS GO Jonathan Grindlay X-ray Observations of 11 Millisecond Pulsars in M28
09500789 SN, SNR AND ISOLATED NS TOO Evert Rol Constraining GRB physics through their afterglow light curves
09500791 SN, SNR AND ISOLATED NS GO Yoichi Yatsu A Chandra observation of the proper motion of RCW 89
09500804 SN, SNR AND ISOLATED NS GO Gerd Puehlhofer HESS J1731-347: The first TeV pulsar wind nebula from a supersonic pulsar with an X-ray bow shock geometry?
09500845 SN, SNR AND ISOLATED NS GO Franz Bauer Constraining the Continued Rise of SN1996cr
09500854 SN, SNR AND ISOLATED NS GO DEREK FOX Study of a New Class of Isolated Neutron Star -- 1RXS J141256.0+792204
09500890 SN, SNR AND ISOLATED NS GO David Burrows AO9 Chandra Monitoring of SNR 1987A
09500896 SN, SNR AND ISOLATED NS TOO Victoria Kaspi TINY HICCUPS TO TITANIC EXPLOSIONS: Tackling Transients in Anomalous X-ray Pulsars
09500898 SN, SNR AND ISOLATED NS GO Duncan Lorimer PSRJ1832+0029: a unique probe of pulsar emission physics
09500899 SN, SNR AND ISOLATED NS TOO Duncan Lorimer PSRJ1832+0029: a unique target for pulsar emission physics
09610049 NORMAL GALAXIES GTO Stephen Murray Ram Pressure Stripping in the Virgo Cluster - M86 Followup
09610400 NORMAL GALAXIES GO Raymond White DUST DISKS AND THE EVOLUTION OF S0 GALAXIES
09610464 NORMAL GALAXIES GO Xinyu Dai Dust-to-gas Ratio of High Redshift Galaxies
09610492 NORMAL GALAXIES GO William Forman Reading the historical chronicle of activity of the SMBH in NGC5813 using cavities and shocks in the surrounding hot gas
09610499 NORMAL GALAXIES GO Ming Sun ESO 137-001 in A3627: ISM Stripping and Intracluster X-ray Binaries
09610593 NORMAL GALAXIES GO Miguel Mas-Hesse The X-ray emission of the Lyman-alpha emitting galaxies Haro 2 and ESO338-04
09620024 NORMAL GALAXIES GTO Stephen Murray Black Hole X-ray Novae in M31
09620084 NORMAL GALAXIES GO Albert Kong X-ray Localization of the Globular Cluster G1 in M31
09620092 NORMAL GALAXIES GO Craig Sarazin Are the X-Ray Binaries in S0 Galaxies Different From Those in Ellipticals?
09620136 NORMAL GALAXIES GO MICHAEL GARCIA Continued M31 Monitoring for Black Hole X-ray Nova
09620187 NORMAL GALAXIES GO Jimmy Irwin The Remarkably Steady Nature of Luminous LMXBs in Elliptical Galaxies
09620205 NORMAL GALAXIES GO Anna Wolter Monitoring the brightest ULXs in the Cartwheel
09620250 NORMAL GALAXIES GO Christine Jones Untangling Sombrero's X-ray Emission from Coronally Active Binaries, Cataclysmic Variables, LMXBs, and Hot Gas
09620513 NORMAL GALAXIES LP Leigh Jenkins Galaxies across the Octaves: A Chandra Legacy Survey of SINGS Galaxies
09620553 NORMAL GALAXIES GO Stephen Zepf Understanding the Low-Mass X-ray Binaries in the Sculptor Dwarf Spheroidal Galaxy
09620585 NORMAL GALAXIES GO Michael Loewenstein First X-ray Observation of the Unique Starburst Galaxy NGC 7673
09620641 NORMAL GALAXIES GO Pilar Esquej NGC 3599: The nearest and most recently discovered tidal disruption event
09620645 NORMAL GALAXIES GO Jonathan Gelbord Super starbursts
09620817 NORMAL GALAXIES GO Rosanne Di Stefano Testing binary evolution in pristine ancient dwarf galaxies
09620823 NORMAL GALAXIES GO Jonathan Grindlay Galactic Bulge Latitude Survey -3
09620865 NORMAL GALAXIES GO Andreas Zezas A deep observation of NGC4261: understanding its unique X-ray source population, gas morphology, and jet properties.
09700043 ACTIVE GALAXIES AND QUASARS GTO Claude Canizares NGC 1068: Photo-ionized gas in the nucleus, and ionization cone
09700056 ACTIVE GALAXIES AND QUASARS GTO Peter Predehl LETGS Spectroscopy of the Narrow-Line Seyfert 1 Galaxy Arakelian 564
09700061 ACTIVE GALAXIES AND QUASARS GTO Gordon Garmire Chandra ACIS Snapshots of the Brightest Radio-Loud Broad Absorption Line Quasars in the SDSS
09700067 ACTIVE GALAXIES AND QUASARS GTO Peter Predehl Chandra follow-up observations of Swift/BAT unidentified sources: Searching for obscured type II quasars
09700091 ACTIVE GALAXIES AND QUASARS GO Farhad Yusef-Zadeh Simultaneous Chandra, VLT, and APEX Observations of Sgr A*
09700098 ACTIVE GALAXIES AND QUASARS TOO Shin Mineshige AN X-RAY MICROLENSING TEST OF THE AU-SCALE CENTRAL STRUCTURE OF THE QUADRUPLE QUASAR 2237+0305
09700175 ACTIVE GALAXIES AND QUASARS GTO George Chartas Studying the Optical and X-ray Emission Regions of Quasar RX J1131-1231 by Monitoring Microlensing Events
09700212 ACTIVE GALAXIES AND QUASARS GO Alan Marscher Velocity Gradients in the Jets of BL Lac Objects
09700219 ACTIVE GALAXIES AND QUASARS GO Iskra Strateva Unraveling the accretion structure of the double-peaked emitter SDSS J2125-0813
09700252 ACTIVE GALAXIES AND QUASARS GO Sarah Gallagher Lower Luminosity AGNs at Cosmologically Interesting Redshifts: SEDs and Accretion Rates of z~0.36 Seyferts
09700284 ACTIVE GALAXIES AND QUASARS TOO Markus Boettcher Coordinated Multiwavelength Observations of New TeV Blazars Detected by VERITAS
09700302 ACTIVE GALAXIES AND QUASARS GO Giuseppina Fabbiano The inner kpc of NGC4151: the AGN-host interaction region in depth
09700387 ACTIVE GALAXIES AND QUASARS GO Frederick Hamann A Simple Test of Quasar Outflow Models
09700405 ACTIVE GALAXIES AND QUASARS GO Gordon Richards Deconstructing the Accretion Disk Wind in Quasars
09700422 ACTIVE GALAXIES AND QUASARS GO Mary Erlund Investigating the physics behind the X-ray / radio offset in 4C 74.26
09700450 ACTIVE GALAXIES AND QUASARS GO Dominik Riechers X-Ray Emission in Radio-Quiet z>4 Quasars: A New Perspective on the AGN-Starburst-Connection?
09700467 ACTIVE GALAXIES AND QUASARS GO Weimin Yuan A Chandra survey of IMBH AGNs with low Eddington ratios
09700477 ACTIVE GALAXIES AND QUASARS GO Christopher Kochanek Dissecting Accretion Disks
09700482 ACTIVE GALAXIES AND QUASARS GO Belinda Wilkes Orientation effects in the X-ray and multi-wavelength properties of high-z, 3CRR quasars.
09700497 ACTIVE GALAXIES AND QUASARS GO GUIDO RISALITI Short-time monitoring of extreme spectral variations in Seyfert 2s
09700570 ACTIVE GALAXIES AND QUASARS GO Judith Croston Shock-heating by double-lobed radio sources in spiral galaxies
09700606 ACTIVE GALAXIES AND QUASARS GO Christopher Reynolds A Chandra Survey of Nearby X-shaped Radio Galaxies
09700655 ACTIVE GALAXIES AND QUASARS GO Richard Mushotzky NGC 4388 the Last Remaining Source - Chandra HETG Constrains on the Fe K line region
09700656 ACTIVE GALAXIES AND QUASARS GO Daniel Evans THE NATURE OF ENERGY TRANSPORT AND PARTICLE ACCELERATION IN THE TRANSITIONAL FRI/FRII RADIO GALAXY 3C 288
09700701 ACTIVE GALAXIES AND QUASARS GO Mario Gliozzi The Chandra view of NGC~3621: A bulgeless galaxy hosting an AGN?
09700736 ACTIVE GALAXIES AND QUASARS GO Matthew Lister Surveying X-ray Jets in Superluminal Blazars
09700745 ACTIVE GALAXIES AND QUASARS GO Daniel Harris Towards a Complete Sample: 3CR Extragalactic Radio Sources with z < 0.3
09700792 ACTIVE GALAXIES AND QUASARS GO Magdalena Kunert-Bajraszewska X-ray properties of compact CSS quasar with BALs - 1045+352
09700908 ACTIVE GALAXIES AND QUASARS GO John Biretta Monitoring the Giant Flare of HST-1 in the M87 Jet
09800046 CLUSTERS OF GALAXIES GTO/TOO Gordon Garmire Chandra Observations of SZ-selected Galaxy Clusters Detected by the South Pole Telescope
09800120 CLUSTERS OF GALAXIES GTO/TOO Stephen Murray South Pole Telescope (SPT) - Chandra Cluster Cosmology
09800154 CLUSTERS OF GALAXIES GO Stefano Andreon Characterisation of the most distant cluster of galaxies, JKCS041 at z=1.91
09800310 CLUSTERS OF GALAXIES LP Steven Allen Probing Dark Energy with Relaxed Galaxy Clusters
09800313 CLUSTERS OF GALAXIES GO Steven Allen Bubble heating in Extreme Cooling Clusters
09800349 CLUSTERS OF GALAXIES GO Alexey Vikhlinin SCALING RELATIONS FOR LOW-MASS GALAXY CLUSTERS AND GROUPS
09800363 CLUSTERS OF GALAXIES GO Andrew Fabian The X-ray Luminous Cluster underlying the Radio-Quiet Quasar H1821+643
09800379 CLUSTERS OF GALAXIES GO Laurence David The Filamentary Structure of the Hot Gas in the NGC5044 Group
09800437 CLUSTERS OF GALAXIES GO Roderick Johnstone The Link between optical nebulae and feedback in cluster cores
09800484 CLUSTERS OF GALAXIES GO Lori Lubin The Active Galaxy Population in a Supercluster at z = 0.7
09800576 CLUSTERS OF GALAXIES GO Sarah Gallagher Chandra/HST Coverage of Compact Galaxy Group Evolution
09800652 CLUSTERS OF GALAXIES GO Aneta Siemiginowska The cluster around the powerful radio-loud quasar 3C186 at z=1.1
09800732 CLUSTERS OF GALAXIES GO Graham Smith LoCuSS: Cluster Mass Comparison with Chandra and HST -- Observational Discrepancy or Agreement in the New Millennium?
09800842 CLUSTERS OF GALAXIES GO JAN VRTILEK AWM 4: a sharp look at the core of a poor cluster stirred by AGN activity
09800847 CLUSTERS OF GALAXIES LP Maxim Markevitch BOW SHOCK, ELECTRON-ION EQUILIBRIUM, BREAKUP OF COOL CORE, AND DARK SUBCLUSTER IN ABELL 520
09900045 EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS GTO Stephen Murray Chandra Observations of the DEEP2 Fields
09900059 EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS GTO Gordon Garmire Intermediate Redshift Groups in the XBootes Survey
09900262 EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS GO Roland Walter Comparing the emission from an unbiased AGN sample with the X-ray background
09900660 EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS VLP Kirpal Nandra The Evolution of Faint AGN at High Redshift
09900679 EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS TOO Luca Zappacosta Detecting the Warm-Hot IGM in Large-Scale Structures
09900712 EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS TOO Andrew Levan Identifying the host galaxies for optically dark gamma-ray bursts
09910027 GALACTIC DIFFUSE EMISSION AND SURVEYS GTO Gordon Garmire The Great Nebula in Carina: Protoplanetary Disks to Starburst Galaxies (GTO component)
09910161 GALACTIC DIFFUSE EMISSION AND SURVEYS VLP Leisa Townsley The Great Nebula in Carina: Protoplanetary Disks to Starburst Galaxies
09910246 GALACTIC DIFFUSE EMISSION AND SURVEYS LP Mikhail Revnivtsev THE ORIGIN OF THE GALACTIC RIDGE X-RAY EMISSION
09910432 GALACTIC DIFFUSE EMISSION AND SURVEYS GO Dong-Woo Kim Intermediate-Age Elliptical Galaxies

Subject Category: SOLAR SYSTEM

Proposal Number: 09100452

Title: High Resolution Imaging and Spectroscopy of 8P/Tuttle

PI Name: Damian Christian

Type: GO

We proposal a 50 ksec ACIS-S observation of the brightest known comet available during Chandra Cycle 9, 8P/Tuttle (2008). The comet will have close passage by the Earth in January 2008, with minimum Earth-comet distance of 0.25 AU and maximum visual brightness V~5.9. We will: search for changes in the spectra as a function of distance from the comet's nucleus and spectral changes across the x-ray bow shock; 2) investigate the spectral changes as a function of changes in the Solar Wind (such as, composition, velocity, and type) by comparing our results with real time solar wind monitors on board ACE, SOHO and STEREO; and 3) test the latest self-consistent physics-based charge exchange models model against the ACIS-S spectra and derive minor ion abundances.

R.A. Dec. Target Name Det. Grating Exp.Time
1:36:13.00 26:13:11.00 8P/Tuttle (2008) ACIS-S NONE 50

Subject Category: STARS AND WD

Proposal Number: 09200028

Title: Search for triggered star formation in the unique bright rimmed cloud 4

PI Name: Gordon Garmire

Type: GTO

In order to further our understanding of the radiation driven implosion (RDI) processes and provide an observational feedback to the theoretical modelling of these processes for a wide range of parameters, we propose to search for and study triggered star formation in the highly under-pressured with respect to its ionized boundary layer and one of the smallest among the known cataloged bright rimmed clouds (BRCs), BRC 4. The data and science analyses similar to those applied in our study of the BRC 38 (= IC 1396N) will be employed.

R.A. Dec. Target Name Det. Grating Exp.Time
0:59:10.00 60:53:40.00 BRC4 ACIS-I NONE 20

Subject Category: STARS AND WD

Proposal Number: 09200053

Title: ACIS Mapping Observation of W75N/DR21

PI Name: Gordon Garmire

Type: GTO

W75N/DR21 is a complex of several massive star-forming regions at a distance of 2-3 kpc in Cygnus. Recent wide-field imaging survey program using Spitzer/IRAC, UKIRT/WFCAM, and JCMT/SCUBA revealed the entire picture of this complex, which is filled with various signatures of massive star birth. The central part of the complex, DR21, is scheduled to be observed by a deep ACIS-I pointing in the cycle 8. By adding two more ACIS-I pointings, we will cover all the major regions in this complex. The primary objective is to conduct a census of weak-line T Tauri stars using their elevated X-ray emission. By combining with the longer wavelength datasets that are sensitive to less evolved population, we will understand how the star formation proceeded in this region.

R.A. Dec. Target Name Det. Grating Exp.Time
20:38:36.50 42:38:46.30 W75N ACIS-I NONE 30

Subject Category: STARS AND WD

Proposal Number: 09200063

Title: X-Raying the debris disk of AU Mic

PI Name: Peter Predehl

Type: GTO

We propose to measure the X-ray absorption by AU Mic s debris disk as well a high resolution spectrum of a flare star which allows us to perform density diagnostics in the N, O, and Ne triplet lines as well as perfrom an abundance analysis of the CNO elements.

R.A. Dec. Target Name Det. Grating Exp.Time
20:45:09.50 -31:20:27.20 AU Mic HRC-S LETG 50

Subject Category: STARS AND WD

Proposal Number: 09200064

Title: The HETG Orion Legacy Project: The Periastron Passage of Theta1 OriC's Massive Secondary

PI Name: Claude Canizares

Type: GTO

The Trapezium Cluster is one of the youngest and closest (440 pc) star-forming regions. Many of the properties we know today are derived from X-ray signatures. This program has two goals. First we study highly resolved X-ray spectra of a large ensemble of very young and chemically similar PMS stars in terms of their magnetic and accretion properties. It is part of our HETG Orion Legacy Project which amouts to 430 ks by the end of AO8. This portion has a second purpose which aims to record the post-periastron passage of the recently discovered massive secondary of Theta 1 Ori C. Orion cannot be observed until midJuly 2007 from which on we will be able to record possible shock emission from colliding wind events or interacting magnetic fields.

R.A. Dec. Target Name Det. Grating Exp.Time
5:35:16.50 -5:23:23.10 Orion Trapezium Cluster ACIS-S HETG 35
5:35:16.50 -5:23:23.10 Orion Trapezium Cluster ACIS-S HETG 52

Subject Category: STARS AND WD

Proposal Number: 09200065

Title: The HETG Orion Legacy Project: PMS Stellar Studies of the Orion Trapezium Cluster

PI Name: Claude Canizares

Type: GTO

The Trapezium Cluster at the center of the Orion Nebula Cluster (ONC) is one of the youngest and closest (440 pc) star-forming regions. Many of the properties we know today are derived from X-ray signatures. Here we study highly resolved X-ray spectra of a large ensemble of very young and chemically similar PMS stars in terms of their magnetic and accretion properties. This is the forth of several installments of our Orion HETG Legacy Program, which already amounts to 430 ks by the end of AO8. There are two installments of 75 ks in AO9. This is the second installment which will lead to the final exposure of the project of 580 ks. On completion we expect about a dozen of well exposed HETG PMS star spectra and HETG Trapezium spectra of supreme quality. .

R.A. Dec. Target Name Det. Grating Exp.Time
5:35:16.10 -5:21:09.50 Orion Trapezium Cluster ACIS-S HETG 25
5:35:16.80 -5:24:04.20 Orion Trapezium Cluster ACIS-S HETG 25
5:35:17.20 -5:23:16.40 Orion Trapezium Cluster ACIS-S HETG 25

Subject Category: STARS AND WD

Proposal Number: 09200079

Title: Protostars and Jets in Cep A

PI Name: Steven Pravdo

Type: GO

Cep A is a region of intense star formation with a well-studied bi-polar molecular outflow, the nearest identified high-mass protostars, and X-ray Herbig-Haro (HH) objects. Unresolved areas of X-ray emission make it a prime target for Chandra/ACIS-I. We propose an 80 ks observation to measure the spatial structure, spectrum, light curve, and intensity of the X-rays, including HWX, the unresolved X-ray candidate for the power source, and to identify counterparts. The goal is to increase our understanding of the energy sources and the outflows. We will also image a nearby ridge of hard X-ray emission to investigate its origin. We will use Chandra s superior spatial resolution to clarify the puzzling offsets between the X-ray emission and the areas of peak optical excitation in HH 168.

R.A. Dec. Target Name Det. Grating Exp.Time
22:56:18.40 62:01:47.00 Cepheus A ACIS-I NONE 80

Subject Category: STARS AND WD

Proposal Number: 09200137

Title: Resolving the Xi Boo Binary

PI Name: Brian Wood

Type: GO

Due to its close proximity (d=6.7 pc), the primary of the Xi Boo binary (G8 V+K4 V) is one of the best targets for studying the coronal characteristics of moderately active stars. However, previous X-ray observations of Xi Boo are complicated by their inability to separate the emissions of the two stars. We propose to obtain LETG/HRC-S spectra of Xi Boo, which will easily resolve the stars and provide high quality spectra of both. We will then explore the nature of an apparent change in coronal character that exists at about the activity level of Xi Boo A by comparing the Xi Boo A spectrum with an existing LETGS spectrum of Epsilon Eri (K1 V), these two stars being on opposite sides of the transition.

R.A. Dec. Target Name Det. Grating Exp.Time
14:51:23.40 19:06:01.70 Xi Boo HRC-S LETG 100

Subject Category: STARS AND WD

Proposal Number: 09200153

Title: BP Psc: Chandra Takes a Close Look at a Pre-Main Sequence Star-Disk-Jet System

PI Name: Joel Kastner

Type: GO

Observational studies of disk-jet systems in pre-main sequence (PMS) stellar evolution provide insight into a diverse range of phenomena, including jet launching and collimation, protostellar accretion, and the formation and evolution of planetary systems. We propose to obtain Chandra/ACIS-S3 imaging spectroscopy of BP Psc, the only known actively accreting and jet-driving PMS star within 100 pc of Earth. These observations will take full advantage of this unparalleled opportunity to probe star-disk-jet interactions within ~30 AU of a PMS star, via X-rays.

R.A. Dec. Target Name Det. Grating Exp.Time
23:22:24.70 -2:13:41.40 BP Psc ACIS-S NONE 80

Subject Category: STARS AND WD

Proposal Number: 09200162

Title: Are the Herbig Ae star HR 5999 and the peculiar A-type star HR 6000 X-ray emitter?

PI Name: Jan Robrade

Type: GO

We propose a 10 ksec pilot study with ACIS-I of the visual A-type binary HR 5999/HR 6000 located in the Lupus star forming region. HR 5999 is a X-ray bright Herbig Ae star, HR 6000 is a possibly magnetic X-ray bright A-type star. Both stars would be ideal grating targets. With the proposed ACIS pointing we want to verify that the X-ray emission does indeed come from the A-type stars.

R.A. Dec. Target Name Det. Grating Exp.Time
16:08:34.50 -39:06:00.00 HR 5999 ACIS-I NONE 10

Subject Category: STARS AND WD

Proposal Number: 09200198

Title: The coronae of ultracool dwarfs: Simultaneous X-ray and radio monitoring

PI Name: Beate Stelzer

Type: GO

In late-type stars the interaction of stellar magnetic fields with hot plasma trapped within the field lines gives rise to Halpha,X-ray and radio emission, as in the Sun. The coolest stars and brown dwarfs not follow this solar-stellar analogy: their radio emission tends to be overluminous by 3 dex with respect to their X-rays, and there is no clear rotation-activity connection. Possibly the situation in ultracool atmospheres is quite different from those of higher-mass stars, and new emission mechanisms need to be invoked. Since both radio and X-ray emission of these objects are strongly variable, the observational picture remains unclear as long as no simultaneous data is available in both bands. We propose here for joint Chandra/VLA observations of 3 ultracool dwarfs.

R.A. Dec. Target Name Det. Grating Exp.Time
3:20:59.70 18:54:23.30 LP412-31 ACIS-S NONE 40

Subject Category: STARS AND WD

Proposal Number: 09200200

Title: Surveying Magnetic Activity in L and T Brown Dwarfs

PI Name: Marc Audard

Type: GO

We propose to continue our investigation of magnetic activity in L and T brown dwarfs in the X-rays with Chandra and in the radio with the VLA and ATCA. We propose to observe three brown dwarfs in the largely unexplored late-L and T regimes with Chandra. Our targets are close, old (~1 Gyr) brown dwarfs, whose Halpha emission should not be contaminated by any accretion mechanism as in young brown dwarfs. With this Chandra proposal, we aim to detect X-rays in brown dwarfs during quiescence or flares. Simultaneous radio observations with the VLA and ATCA are requested as well. This investigation will help us to obtain a census of magnetic activity in L and T brown dwarfs and to better understand the efficiency to generate magnetic fields at the bottom of the main sequence.

R.A. Dec. Target Name Det. Grating Exp.Time
2:55:04.60 -47:00:56.90 DENIS-P J0255.0-4700 ACIS-S NONE 30
14:57:15.70 -21:22:04.70 Gl 570D ACIS-S NONE 40

Subject Category: STARS AND WD

Proposal Number: 09200214

Title: NGC 3576: Spontaneous or Triggered Formation of a Giant HII Region

PI Name: Leisa Townsley

Type: GO

Our understanding of massive star formation is uncertain at all levels, from individual stars to massive stellar clusters to OB associations. Our first Chandra observation of the Galactic giant HII region NGC 3576 addressed one example of the first of these problems: because hard X-rays penetrate even very large columns of obscuring material, we were able to pinpoint massive, young, embedded stars that remained undetected even at 3.5 microns, solving the mystery of NGC 3576's missing ionizing sources. With a new ACIS-I pointing and the first Spitzer observation of this target, we will address the second two of these problems: how massive clusters form and how they are related to the formation and evolution of the larger-scale, unbound populations known as OB associations.

R.A. Dec. Target Name Det. Grating Exp.Time
11:12:04.50 -61:05:43.00 HD 97484 ACIS-I NONE 60

Subject Category: STARS AND WD

Proposal Number: 09200253

Title: The Further Fainting of Alpha Cen A

PI Name: Thomas Ayres

Type: GO

Alpha Centauri (G2V + K1V) is the nearest system of solar-like stars. The primary has long been regarded a solar twin. Previous X-ray missions have been able to separate the coronal point sources (14" apart in Y2000), although the orbit now is closing rapidly and beyond 2006 can only be resolved easily by Chandra. The 25 year X-ray record has revealed striking long term changes in the Alpha Cen coronae, likely related to analogs of the still mysterious solar sunspot cycle. Recent work suggests that the K star is falling into a cycle minimum, while the G star is relapsing following a brief recovery from an unprecedented deep X-ray minimum in 2005 (that fully challenges our understanding of stellar dynamos). Two 10 ks HRC-I snapshots in 2008 will build on this remarkable coronal narrative.

R.A. Dec. Target Name Det. Grating Exp.Time
7:39:18.10 5:13:30.00 Procyon HRC-I NONE 5
14:39:32.30 -60:50:02.00 Alpha Centauri HRC-I NONE 10
14:39:32.30 -60:50:02.00 Alpha Centauri HRC-I NONE 10

Subject Category: STARS AND WD

Proposal Number: 09200255

Title: A Survey of X-ray Emission from Nitrogen-rich Wolf-Rayet Stars

PI Name: Stephen Skinner

Type: GO

The winds of Wolf-Rayet (WR) stars enrich the ISM with heavy elements that will be recycled into future generations of stars and WR stars end their lives as supernovae, creating powerful shock waves that will trigger new star formation. Previous X-ray studies of WR stars have focused on X-ray bright WR+O binary systems and little is known about the origin of X-ray emission from single WR stars. We propose to conduct a limited survey of the closest known single nitrogen-rich (WN subtype) Wolf-Rayet stars. This study will complement a parallel survey of more evolved carbon-rich (WC subtype) WR stars now underway. This pilot survey will break new ground and will provide basic information on X-ray properties needed to test wind-shock theories.

R.A. Dec. Target Name Det. Grating Exp.Time
1:05:23.00 60:25:18.90 WR 2 ACIS-S NONE 15
10:17:02.30 -57:54:46.90 WR 18 ACIS-S NONE 20
20:10:14.20 36:10:35.10 WR 134 ACIS-S NONE 20

Subject Category: STARS AND WD

Proposal Number: 09200257

Title: The clear view of WR140's collisionless shocks through the companion O-star wind

PI Name: Andrew Pollock

Type: GO

In January 2009, two extraordinary high-mass colliding-wind binary systems, eta Car and WR140, will go through the periastron passages of their respective 5.5 and 7.9 year orbits. The preceding months are the most favorable for observing the rapid rise to X-ray maximum and learning fundamental lessons about shocks, hot plasmas and mass-loss in the upper HR diagram. Three HETGS snapshot spectra of WR140 will capture the line-profile and global spectral responses of its collisionless shocks to the changing physical conditions that follow the well-defined orbital geometry, offering unique information about the plasma and mass loss from both stellar components. This proposal, and one on eta Car, will take advantage of opportunities for X-ray specroscopy that might not arise again.

R.A. Dec. Target Name Det. Grating Exp.Time
20:20:28.00 43:51:16.20 WR 140 ACIS-S HETG 80

Subject Category: STARS AND WD

Proposal Number: 09200270

Title: Filling in the Coronal Graveyard

PI Name: Thomas Ayres

Type: GO

20 ks Chandra HRC-I pointings on 5 late-type G/K supergiants in the depths of the "coronal graveyard" will complete a survey of the limits of X-ray activity in evolved cool stars. Our ambition is to gain insight into magnetic generation in the absence of sensible rotation, and the disposition of hot coronal structures in the extended outer envelopes of these objects, possibly partially smothered under a "cool absorber." Such buried activity might be the long sought initiator of chromospheric winds in the giant branch. Coronal activity is important to the Sun-Earth connection, the fate of primitive planetary atmospheres, and a broad reaching set of magnetic phenomena in diverse cosmic environments. Understanding the activity, and its evolution, is a key objective of stellar astrophysics.

R.A. Dec. Target Name Det. Grating Exp.Time
17:26:30.90 4:08:25.00 HD157999 HRC-I NONE 20

Subject Category: STARS AND WD

Proposal Number: 09200326

Title: Search for X-Ray Emission from TW Hya Association Brown Dwarfs

PI Name: John Gizis

Type: GO

There are four known brown dwarfs which are members of the TW Hya Association (TWA). With an age of 10 Myr and a distance of only fifty parsecs, this association is the best opportunity to study young brown dwarfs in detail. Chandra has already observed two of the TWA brown dwarfs; we propose here to observe the other two. By doubling the sample, we will test ideas about coronal and chromospheric emission and about activity due to accretion from circumstellar disks. Spitzer observations for all of these brown dwarfs have been taken or are scheduled.

R.A. Dec. Target Name Det. Grating Exp.Time
11:39:51.10 -31:59:21.00 2MASSW J1139511-315921 ACIS-S NONE 30

Subject Category: STARS AND WD

Proposal Number: 09200357

Title: Survey of Class 0 Protostars in the Smallest Clouds 'Bok Globules'

PI Name: Yohko Tsuboi

Type: GO

We propose a survey of six nearby Bok globules to search for X-rays from Class 0 protostars. X-rays from Young Stellar Objects are likely to originate from the near vicinity of the star itself. The detection of the X-rays from Class 0 protostars, therefore, is of particular importance, providing direct evidence that the central star has been born. However, protostars are usually deeply embedded within the cloud, so that, even the X-rays are completely absorbed. Bok globules are known as star formation sites surrounded by light and small molecular clouds of 10 Mo. The small absorption column of Bok globules provides us an opportunity to search for whether X-rays ``turn on'' during the Class 0 phase and if so, when?

R.A. Dec. Target Name Det. Grating Exp.Time
12:01:44.00 -65:09:06.00 BHR71-MM ACIS-I NONE 10
20:51:22.10 60:18:39.00 GF9-2 ACIS-I NONE 10

Subject Category: STARS AND WD

Proposal Number: 09200403

Title: The Coolest X-ray Emitting White Dwarfs?

PI Name: Marcel Agueros

Type: GO

Among the ~6000 new white dwarfs (WDs) spectroscopically confirmed by the Sloan Digital Sky Survey (SDSS) are three cool DAs and two cool DBs within 1' of super-soft ROSAT All-Sky Survey (RASS) sources. WDs at these relatively low temperatures (<23,000 K) are not expected to be X-ray emitters, but the SDSS photometric and spectroscopic data fail to identify any other obvious optical counterparts to the RASS sources to the SDSS limits (g~22 mag in photometry). We propose a total of 25 ksec of Chandra observations of these five SDSS WDs to obtain pinpoint X-ray positions and improved flux measures for these objects. If Chandra data confirm that the five WDs are X-ray sources, they will be of great interest; in particular, work will be required to explain how such cool WDs can emit X rays.

R.A. Dec. Target Name Det. Grating Exp.Time
9:31:22.90 36:22:09.40 SDSS J0931+3622 ACIS-S NONE 5
15:32:25.50 47:27:00.90 SDSS J1532+4727 ACIS-S NONE 5

Subject Category: STARS AND WD

Proposal Number: 09200488

Title: The Full Picture of Magnetic Activity in Ultracool Dwarfs: Simultaneous Observations of Coronae and Chromospheres

PI Name: Edo Berger

Type: GO

Only a decade ago, theoretical expectation was that magnetic activity would disappear beyond M5. While we now know that stellar activity exists in some late-M dwarfs, only a few such objects have been observed in the X-rays. Thus, the ubiquity and physics of coronae and magnetic fields remain unclear. This is exacerbated by the shift to flaring emission, whose properties are poorly characterized due to the lack of simultaneous observations. It is therefore time to produce a complete picture of the coronae and chromospheres in ultracool dwarfs, and directly implicate magnetic fields in this activity. Here we propose to delineate the underlying physics of the magnetic activity with fully simultaneous observations in the X-ray, radio, and H-alpha bands.

R.A. Dec. Target Name Det. Grating Exp.Time
0:24:24.60 -1:58:20.00 BRI0021-0214 ACIS-I NONE 30
5:23:38.20 -14:03:02.00 2MASS J0523382-140302 ACIS-I NONE 30
6:02:30.50 39:10:59.00 LSR0602+3910 ACIS-S NONE 30
7:46:42.50 20:00:32.00 2MASS J0746425+200032 ACIS-I NONE 30

Subject Category: STARS AND WD

Proposal Number: 09200532

Title: X-raying the Giant HII Region G305

PI Name: Marc Gagne

Type: GO

G305, one of the nearest giant HII regions, contains a WR binary, eight distinct clusters each containing hundreds of stars and eight maser sources and ucHII regions each containing 4-8 very young O stars. The bubble contains ~30 O stars suggesting a population ~15,000 cluster members. A 125-ks ACIS exposure will detect all of the high-mass stars and a high fraction of the low-mass YSOs in the central clusters and HII regions. A 60-ks EPIC exposure will do the same in the sparser outer clusters and HII regions. The EPIC observation may detect diffuse emission in the inner cavity or within the optical HII region RCW 74. Our goals are to obtain ACIS and EPIC spectra of the high-mass stars, EPIC and RGS spectra of WR 48a, EPIC spectra of diffuse X-rays and a census of the low-mass YSOs.

R.A. Dec. Target Name Det. Grating Exp.Time
13:12:17.50 -62:42:20.00 G305 ACIS-I NONE 125

Subject Category: STARS AND WD

Proposal Number: 09200535

Title: An Emerging Class of Hot Emission Line Stars: HD 119682

PI Name: Cara Rakowski

Type: GO

Herein we propose to observe the dispersed spectrum of the emission line star HD 119682. Existing CCD-resolution observations show this source to be both luminous and impressively hot, such that its emission cannot be explained by the standard radiatively-driven-wind model for O stars. At more the 4 Myr old, a magnetically confined wind would be unprecedented for a star of its age. Alternatively this may be an example of an emerging class of "gamma Cas analogs", emission-line early B stars with a narrow range of optical properties and X-ray spectra dominated by a hot (>8 keV) thermal component.

R.A. Dec. Target Name Det. Grating Exp.Time
13:46:32.60 -62:55:24.10 HD 119682 ACIS-S HETG 150

Subject Category: STARS AND WD

Proposal Number: 09200536

Title: ToO Studies with CXO of Pre-Main Sequence Stars Undergoing Optical Outbursts

PI Name: David Weintraub

Type: TOO

Dramatic optical outbursts, which signal the onset of rapid and dramatic accretion onto pre-main sequence stars through their disks, cannot be predicted; however, our previous CXO campaign to study the outburst source V1647 Ori demonstrates that studies of such stars made with CXO beginning immediately after outburst can dramatically increase our knowledge about how and why such stars undergo outbursts and accrete mass. We therefore propose a target of opportunity campaign to observe any such stars discovered during Cycle 9. We will use ACIS-S, to enable us to carry out 20ks - 30 ks imaging spectroscopy observations, spaced by intervals of two and later three months, beginning immediately after discovery and continuing through the end of Cycle 9.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 FUor ToO ACIS-I NONE 20
0:00:00.00 0:00:00.00 FUor ToO ACIS-I NONE 20
0:00:00.00 0:00:00.00 FUor ToO ACIS-I NONE 20
0:00:00.00 0:00:00.00 FUor ToO ACIS-I NONE 30
0:00:00.00 0:00:00.00 FUor ToO ACIS-I NONE 30
0:00:00.00 0:00:00.00 FUor ToO ACIS-I NONE 30

Subject Category: STARS AND WD

Proposal Number: 09200559

Title: Effects of massive star radiation on circumstellar disks evolution in the Eagle Nebula

PI Name: Mario Guarcello

Type: GO

We will determine the frequency of disk and disk-less stars in the outer regions (relatively poor of massive stars) of the young cluster NGC 6611, with the aim to study the effects of UV flux due to massive stars on the evolution of circumstellar disks around low mass stars. Our previous results for the central region of the cluster show that this effect may be present, but we need to observe stars at larger distance from massive stars. This cluster is particularly well suited for our study, thanks to the irregular spatial distribution of its OB stars. CHANDRA observations are crucial for identifying the disk-less population undetectable with other method.

R.A. Dec. Target Name Det. Grating Exp.Time
18:19:12.00 -13:33:00.00 NGC 6611 ACIS-I NONE 80
18:19:36.00 -13:47:24.00 NGC 6611 ACIS-I NONE 80

Subject Category: STARS AND WD

Proposal Number: 09200564

Title: X-ray and Radio Imaging of the Protostar Complex Adjacent to IC 348

PI Name: Scott Wolk

Type: GO

Among several classes of active stars and solar flares, a tight relation between X-ray and radio luminosities is found. This relation implies an intimate physical connection. We propose a pair of 40 ks coordinated VLA/ACIS-I observations of a newly revealed filamentary structure of nearly two dozen protostars and pre-stellar cores just southwest of IC 348. Using extant Spitzer and SCUBA data we have a full inventory of the stellar types in this cluster which contains Class 0 and Class I protostars and outflow sources in addition to classical and weak T-Tauri stars. We will complete the census of this nearby, actively forming, sub-cluster and study the causal relation of radio and X-ray emission for all types of young stars, both in flare and quiescent.

R.A. Dec. Target Name Det. Grating Exp.Time
3:43:59.90 31:58:21.70 IC 348 - Southwest ACIS-I NONE 40
3:43:59.90 31:58:21.70 IC 348 - Southwest ACIS-I NONE 40

Subject Category: STARS AND WD

Proposal Number: 09200584

Title: Shock Dynamics in Eta Carinae Approaching the 2009 Periastron Passage: A Twisted Tail

PI Name: Michael Corcoran

Type: GO

In January 2009, the two most extraordinary high-mass colliding-wind binary systems, eta Car and WR140, will go through the periastron passages of their respective 5.5 and 7.9 year orbits. The months before, during their rapid rise to X-ray maximum, are the most favorable time for observing X-ray emission at high resolution and learning fundamental lessons about shocks, hot plasmas and mass-loss in the upper HR diagram. Three HETGS observations of Eta Car will monitor X-ray line and continuum changes to obtain unique information about the X-ray emitting plasma in the wind-wind collision, as a probe of mass loss from Eta Car and from the hidden companion star. This proposal, and a complementary one on WR 140, will take advantage of an opportunity that may never arise again.

R.A. Dec. Target Name Det. Grating Exp.Time
10:45:03.60 -59:41:04.30 Eta Car ACIS-S HETG 80

Subject Category: STARS AND WD

Proposal Number: 09200644

Title: Polar Exploration and Coronal Structure in the Active Binary HR 5110

PI Name: Rachel Osten

Type: GO

Overwhelming evidence exists for the importance of polar regions in controlling stellar atmospheric structure and dynamics in active binary systems. Uncertainties about the geometry of coronal emission have made conclusions about coronal structures on such stars ambiguous. We seek Chandra, VLA and VLBA observations of the nearly pole-on active binary system HR 5110 in order to investigate coronal structures without such ambiguity. An 80 ks Chandra observation will constrain thermal coronal volumes through electron densities; radio observations will constrain nonthermal coronal volumes directly, and allow an estimation of the relative importance of thermal and nonthermal plasma in controlling and structuring active stellar coronae.

R.A. Dec. Target Name Det. Grating Exp.Time
13:34:47.80 37:10:56.70 HR 5110 ACIS-S HETG 40
13:34:47.80 37:10:56.70 HR 5110 ACIS-S HETG 40

Subject Category: STARS AND WD

Proposal Number: 09200659

Title: Catching the Post-Outburst State of the Erupting Star V1118 Ori

PI Name: Marc Audard

Type: GO

We propose to catch the post-outburst state of the young accreting star V1118 Ori with Chandra and Spitzer. V1118 Ori underwent an optical outburst in January 2005 and has now returned to a ``quiescent'' state. Our X-ray monitoring observations have shown that the X-ray spectrum softened after the outburst, maybe due to changes in the magnetic structure near the star as a result of the increased accretion load. Our long-term monitoring indicates that the X-ray flux correlates with the optical flux, a signature that accretion can impact the X-ray emission of outbursting young stars. We propose also to obtain the post-outburst spectral energy distribution in the mid-infrared with Spitzer. We will compare the new data with those taken by us in the early phase of the outburst.

R.A. Dec. Target Name Det. Grating Exp.Time
5:34:44.70 -5:33:41.30 V1118 Ori ACIS-S NONE 35

Subject Category: STARS AND WD

Proposal Number: 09200673

Title: Can different elements move with different velocities in a radiatively driven stellar wind?

PI Name: Lidia Oskinova

Type: GO

B-type stars of lower luminosity classes have relatively weak stellar winds. In this respect they resemble presumably the more massive, but metal-poor stars in the early Universe. Theory predicts that very thin stellar winds are multi-component fluids. The ions of iron group metals are accelerated by radiation pressure, but do not transfer their momentum to the bulk of material. This dynamical decoupling is not yet observationally confirmed. LETG HRC-S spectra of the X-ray brightest non-degenerate massive star alpha Cru will allow to detect different velocities of particle species in stellar wind. These observations will empirically confirm or disprove the effect of dynamical decoupling in a thin stellar wind.

R.A. Dec. Target Name Det. Grating Exp.Time
12:26:35.90 -63:05:56.50 HD 108248 HRC-S LETG 30

Subject Category: STARS AND WD

Proposal Number: 09200690

Title: The Evolution of X-ray Emission in the Planet-Forming Era

PI Name: Jon Miller

Type: GO

The 4-30 Myr age range is particularly important in the life of pre-main sequence stars. It is in this age range where disks dissipate, as evidenced by a decrease in infrared excess emission arising from disks. Giant planets are expected to form in this age range, and the possible link between planet formation and disk dissipation is presently one of the most studied topics in star and planet formation. The dissipation of disks must have profound and testable consequences for the X-ray emission in this age range. Yet we are still lacking information on the early evolution of the X-ray emission in pre-main sequence stars. We therefore propose to make ACIS-I observations of fields in four 4-10 Myr clusters: NGC 7160, Tr 37, 25 Ori, and Ori OB1b.

R.A. Dec. Target Name Det. Grating Exp.Time
21:53:48.00 62:36:00.00 NGC 7160 ACIS-I NONE 70

Subject Category: STARS AND WD

Proposal Number: 09200730

Title: X-ray Emission from a 7 Myr Old, Accreting Herbig Ae star and its Jet: MWC 480

PI Name: Carol Grady

Type: GO

We are requesting Chandra ACIS-S imagery of MWC 480, a 7 Myr old Herbig Ae star with an accretion rate of 1E-8 solar masses/yr, intermediate between younger, accreting stars and older stars with transitional disks. The proposed integration will allow us to better delineate the evolution of X-ray activity in Herbig Ae stars, testing the hypothesis that the L_x is correlated with accretion signatures, rather than originating in coronal emission associated with a decaying dynamo. MWC 480 is also associated with a parsec-scale bipolar outflow, HH 728, with a 50" long counterjet which terminates in large, bright Herbig-Haro (HH) knot which will permit us to test models for X-ray production in HH knots over a wider range in outflow parameters than has been done to date.

R.A. Dec. Target Name Det. Grating Exp.Time
4:58:46.30 29:50:37.00 MWC 480 ACIS-S NONE 10

Subject Category: STARS AND WD

Proposal Number: 09200763

Title: X-RAY AND UV PHOTOIONIZATION AND PHOTOEXCITATION OF PRE-MAIN-SEQUENCE STAR TRANSITIONAL DISKS

PI Name: Alexander Brown

Type: GO

Transitional disks are one of the most crucial and important stages of the evolution of pre-main-sequence stars and protoplanetary systems. These disks have transformed most of the dust and gas in their inner regions into planetesimals and show clear inner ``holes'' that almost certainly harbor infant planetary systems. We propose to observe 3 young stars with transitional disks (T Cha, GM Aur, LkHa 330) using ACIS-S to measure their X-ray radiation field and coronal emission properties and HST ACS-SBC to image the fluorescently excited molecular hydrogen in these systems to determine if the gas distribution follows the behavior seen in the dust distribution. Our broader goal is to model the X-ray/UV photoionization and photoexcitation of the disks and study their photochemistry.

R.A. Dec. Target Name Det. Grating Exp.Time
4:55:11.00 30:21:59.40 GM AUR ACIS-S NONE 20

Subject Category: STARS AND WD

Proposal Number: 09200803

Title: A detailed investigation of coronal/magnetic and rotational changes in cool stars using NGC 3532

PI Name: Steven Saar

Type: GO

We propose to use Chandra ACIS-I to study the one-to-one correspondence recently proposed between coronal/dynamo and rotational changes in cool stars. The goal is insight into the physical basis underlying the 3-part X-ray classification of cool stars (saturated, super-saturated, and normal rotation-activity), crucial to fully interpreting the rotational/magnetic/activity evolution of cool stars. We already have copious optical data on our rich target open cluster NGC 3532, including 83 rotation periods for the cluster members, making it uniquely useful for rotation-activity studies. Furthermore, its age, 300Myr, nicely bridges a gap in the age sequence of the best studied clusters between 100Myr (Pleiades) and 600Myr (Hyades), permitting detailed study of evolution between these epochs.

R.A. Dec. Target Name Det. Grating Exp.Time
11:05:06.00 -58:48:00.00 NGC 3532 ACIS-I NONE 130

Subject Category: STARS AND WD

Proposal Number: 09200839

Title: X-ray Emission from the Hot White Dwarf KPD 0005+5106: Corona or Accretion?

PI Name: You-Hua Chu

Type: GO

X-rays at energies >0.5 keV, not expected from the photosphere of a white dwarf (WD), can be produced only in stellar coronae or from accretion of material onto a WD's surface. KPD 0005+5106 and WD 2226-210 are two outstanding cases of single WDs with X-ray emission at 1 keV. Recent Spitzer observations of WD 2226-210, the central star of the Helix Nebula, reveal excess continuum emission starting at 8 um and peaking at 24-70 um, indicating the existence of a dust disk at 50-100 AU from the star. The dust is most likely produced by collisions among Kuiper Belt-like objects (KBOs). Stray KBOs impacting the WD surface may produce the 1 keV emission. We request Chandra and Spitzer observations of KPD 0005+5106 to search for a similar dust disk and determine the origin of its 1 keV emission.

R.A. Dec. Target Name Det. Grating Exp.Time
0:08:18.40 51:23:19.00 KPD 0005+5106 ACIS-S NONE 50

Subject Category: STARS AND WD

Proposal Number: 09200905

Title: Evaluating the Role of Photoevaporation in Protoplanetary Disk Dispersal

PI Name: Gregory Herczeg

Type: GO

Emission produced by accretion onto the central star leads to photoevaporation, which may play a fundamental role in disk dispersal. Models of disk photoevaporation by the central star are challenged by two potential problems: the emission produced by accretion will be substantially weaker for low-mass stars, and photoevaporation must continue as accretion slows. We propose use HST/ACS SBC PR130L to obtain FUV spectra of WTTSs and of CTTSs at low masses and mass accretion rates to provide crucial data to evaluate photoevaporation models. We will estimate the FUV and EUV luminosities of low-mass CTTSs with small mass accretion rates, CTTSs with transition disks and slowed accretion, and of magnetically-active WTTSs.

R.A. Dec. Target Name Det. Grating Exp.Time
11:32:41.50 -26:51:55.00 TWA-8 ACIS-S NONE 5
11:48:24.20 -37:28:49.20 TWA-9 ACIS-S NONE 5

Subject Category: STARS AND WD

Proposal Number: 09200907

Title: A Hard Look at Stellar Disks at the Epoch of Planet Formation

PI Name: Lee Hartmann

Type: GO

We propose to use the HST/ACS/SBC and Chandra/ACIS-S3 to observe the high energy fluxes of 4 stars surrounded by disks in the newly discovered aggregate 25 Ori, the most populous 10 Myr group known within 500 pc. Our observations will cover the 1-25 A and 1250-2000 A bandpasses, and will complement our optical and Spitzer data for these objects, to provide essential input to physically-consistent models of disk structure and chemistry in the age range around 10 Myr, thought to be a critical period in the planet-forming process. Our proposed observations will double the number of 10 Myr old accreting stars with known high energy radiation fields, and will be the first FUV observations of low mass accreting stars in an OB association.

R.A. Dec. Target Name Det. Grating Exp.Time
5:24:41.00 1:54:38.60 OB1A-776 ACIS-S NONE 10
5:25:45.90 1:45:50.10 OB1A-1192 ACIS-S NONE 10
5:25:46.80 1:43:30.30 OB1A-1200 ACIS-S NONE 10
5:26:55.40 1:40:22.50 OB1A-1630 ACIS-S NONE 10

Subject Category: STARS AND WD

Proposal Number: 09200909

Title: Probing the Gas in the Planet Forming Regions of Protoplanetary Disks

PI Name: Nuria Calvet

Type: GO

The origin of planets is intricately tied to the evolution of primeval disks. The finer details of how the disk material evolves from an initially well-mixed distribution of gas and dust to a system composed mostly of large solids and gas giants like our own solar system is not well understood and is a fundamental question in astronomy. We can refine theories of planet formation and develop timescales for the evolution of planetary systems by studying the inner, planet-forming regions of protoplanetary disks.

R.A. Dec. Target Name Det. Grating Exp.Time
3:44:13.20 32:06:00.00 IC 348 ACIS-I NONE 50
5:46:02.40 -0:09:00.00 NGC 2068/2071 ACIS-I NONE 50
10:58:16.80 -77:17:17.10 T6/SZ Cha ACIS-I NONE 25
11:08:39.10 -77:16:04.20 T35/SZ27 ACIS-I NONE 25

Subject Category: WD BINARIES AND CV

Proposal Number: 09300001

Title: Resolving short supersoft source states of optical novae in the core of M31

PI Name: Wolfgang Pietsch

Type: GO

We propose to monitor the M31 core with five 23ks XMM-Newton EPIC and five 20ks Chandra HRC-I observations equally distributed from Nov 2007 to mid Feb 2008 to determine the light curves for short supersoft source (SSS) states of optical novae. SSS states with <100 d duration indicate accreting massive white dwarfs. They are proposed as SN Ia progenitors and determining their frequency is very important. We will correlate detected sources with novae from optical monitoring of the same area. With a nova rate in the field of ~25/yr and SSS states lasting from weeks to years we will follow light curves of many novae. Durations of the nova SSS state will allow us to constrain envelope and white dwarf masses. We will also monitor time variability of ~200 M31 centre X-ray sources (mostly XRBs).

R.A. Dec. Target Name Det. Grating Exp.Time
0:42:44.30 41:16:09.40 M31 HRC-I NONE 20
0:42:44.30 41:16:09.40 M31 HRC-I NONE 20
0:42:44.30 41:16:09.40 M31 HRC-I NONE 20
0:42:44.30 41:16:09.40 M31 HRC-I NONE 20
0:42:44.30 41:16:09.40 M31 HRC-I NONE 20

Subject Category: WD BINARIES AND CV

Proposal Number: 09300101

Title: A Chandra Legacy Survey of Dynamically Active Globular Clusters

PI Name: David Pooley

Type: LP

From our experience with Chandra, we have determined an empirical, successful, and model-independent method for determining the the neutron-star low-mass X-ray binary (LMXB) content and bright cataclysmic variable (CV) of a globular cluster (GC) in a reasonably short ACIS exposure. We propose a program that will discover ~30 LMXBs and ~150 CVs in 31 GCs. When combined with other observations, we will have direct knowledge of over 90% of the total LMXB population in GCs. We will accurately determine the role of GC dynamics in the formation of both LMXBs and CVs. We will also obtain an estimate for the density of the LMXBs and CVs in the field. This study will have important implications both for theories of LMXB and CV formation and for theories of GC dynamics and evolution.

R.A. Dec. Target Name Det. Grating Exp.Time
5:14:06.30 -40:02:50.00 NGC 1851 ACIS-S NONE 19.6
13:46:26.50 -51:22:24.00 NGC 5286 ACIS-S NONE 13.1
15:28:00.50 -50:40:22.00 NGC 5927 ACIS-S NONE 7.7
16:27:40.40 -38:50:56.00 NGC 6139 ACIS-S NONE 17.8
16:59:32.60 -37:07:17.00 NGC 6256 ACIS-S NONE 9.4
17:10:10.20 -26:34:55.00 NGC 6293 ACIS-S NONE 10
17:14:32.10 -29:27:44.00 NGC 6304 ACIS-S NONE 5.3
17:17:59.20 -23:45:57.00 NGC 6325 ACIS-S NONE 17.9
17:19:11.80 -18:30:59.00 NGC 6333 ACIS-S NONE 8.4
17:37:36.10 -3:14:45.00 NGC 6402 ACIS-S NONE 12.2
17:38:36.60 -23:54:34.00 NGC 6401 ACIS-S NONE 11.2
18:03:34.10 -30:02:02.00 NGC 6522 ACIS-S NONE 8.4
18:04:49.60 -30:03:21.00 NGC 6528 ACIS-S NONE 12.3
18:04:49.80 -7:35:09.00 NGC 6539 ACIS-S NONE 14.6
18:06:08.60 -27:45:55.00 NGC 6540 ACIS-S NONE 5
18:09:17.60 -25:54:31.00 NGC 6553 ACIS-S NONE 5.5
18:13:38.80 -31:49:37.00 NGC 6569 ACIS-S NONE 11.2
18:30:56.10 -25:29:51.00 NGC 6638 ACIS-S NONE 9
18:31:23.20 -32:20:53.00 NGC 6637 ACIS-S NONE 7.3
18:31:54.10 -23:28:31.00 NGC 6642 ACIS-S NONE 7.6
18:43:12.70 -32:17:31.00 NGC 6681 ACIS-S NONE 7.2
19:18:02.10 18:34:18.00 Pal 10 ACIS-S NONE 11.2
21:33:29.30 -0:49:23.00 NGC 7089 ACIS-S NONE 11.5

Subject Category: WD BINARIES AND CV

Proposal Number: 09300413

Title: The Symbiotic Star SS73 17: What Generates the Hard X-rays?

PI Name: Randall Smith

Type: GO

SS73 17 was an innocuous Mira-type symbiotic star until INTEGRAL and Swift discovered its bright hard X-ray emission. Suzaku observations then showed it emits three bright iron lines as well, with almost no emission in the 0.5-2 keV bandpass. The origin of the lines is unclear - scattered, thermal or photoionized sources, at high- or low-density are all plausible - but with a 100 ksec HETG observation we can resolve this question. Beyond its intrinsic interest as one of the few symbiotics showing hard X-rays (uniquely, it shows no optical flaring), SS73 17 may be the "missing link" that explains the line emission from the Galactic Ridge X-ray Emission (GRXE), as its iron lines have roughly the same radio as the GRXE while its soft X-ray flux is at or below ROSAT's detection threshold.

R.A. Dec. Target Name Det. Grating Exp.Time
10:11:02.90 -57:48:13.90 SS73 17 ACIS-S HETG 100

Subject Category: WD BINARIES AND CV

Proposal Number: 09300509

Title: Multiwavelength Observations of Two Bright Dust Forming CO Novae: V2362 Cyg and V1280 Sco

PI Name: Sumner Starrfield

Type: TOO

We request two 25 ks HRC-S+LETG observations for each of two slow, dust-forming, carbon-oxygen Classical Novae: V2362 Cyg and V1280 Sco. This will be the first time that this class of novae has been observed in X-rays. This is a Target-of-Opportunity proposal and we will use SWIFT to confirm that each nova is sufficiently bright for a grating spectrum before triggering our Chandra observations. Since the XRT instrument on SWIFT has roughly the same spectral resolution and effective area as ACIS-S on Chandra, the improved spectral resolution of the Chandra gratings is the justification for our observations. We will obtain monitoring observations with SWIFT, with Spitzer, Gemini, and other ground based telescopes.

R.A. Dec. Target Name Det. Grating Exp.Time
16:57:41.20 -32:20:35.80 V1280 Sco HRC-S LETG 25
16:57:41.20 -32:20:35.80 V1280 Sco HRC-S LETG 25
21:11:32.50 44:48:03.70 V2362 Cyg HRC-S LETG 25
21:11:32.50 44:48:03.70 V2362 Cyg HRC-S LETG 25

Subject Category: WD BINARIES AND CV

Proposal Number: 09300602

Title: X-ray Jets Activity in the Symbiotic System CH Cyg

PI Name: Margarita Karovska

Type: GO

We propose follow up Chandra observations of the recently discovered X-ray jets in the nearby symbiotic system CH Cyg. CH Cyg is only the second symbiotic systems with jet activity detected at X-ray wavelengths. Symbiotic systems are fascinating accreting binaries with a key evolutionary importance since they are potential progenitors of bipolar PN and SN type Ia. The Chandra observations, combined with HST and VLA imaging, will provide the closest view of the region where jets form and interact with the surrounding material. The observations will provide a key information on the spatial, spectral and temporal characteristics of the jets, crucial inputs and quantitative constraints to models of non-relativistic jets.

R.A. Dec. Target Name Det. Grating Exp.Time
19:24:33.00 50:14:27.10 CH Cyg ACIS-S NONE 80

Subject Category: WD BINARIES AND CV

Proposal Number: 09300685

Title: The Nature of the Soft Component in the Symbiotic Star, CH Cygni

PI Name: Koji Mukai

Type: TOO

The symbiotic star CH Cyg consists of an M giant and a white dwarf, and displays a two-component X-ray spectrum. The absorbed hard X-ray component is likely due to accretion onto the white dwarf. The unabsorbed soft X-ray component is thought to be either due to colliding winds or due to photoionization of the M giant wind by the hard component. We propose to obtain a high signal-to-noise grating spectrum of CH Cyg to resolve the origin of its soft component. Once we know its origin, we can begin to probe the environment around the white dwarf using the detailed spectral shape of the soft component. We propose this as a slow TOO, to be triggered when we know that CH Cyg is X-ray bright.

R.A. Dec. Target Name Det. Grating Exp.Time
19:24:33.10 50:14:29.10 CH Cygni ACIS-S HETG 100

Subject Category: BH AND NS BINARIES

Proposal Number: 09400002

Title: Joint XMM-Newton/Chandra/RXTE Observations of Dips in Cyg X-1

PI Name: Joern Wilms

Type: GO

At phase 0, Cyg X-1 shows pronounced soft X-ray dips due to highly variable, partial blockage from the accretion stream. Studying these dips requires joint XMM/Chandra/RXTE observations: XMM will provide the continuum through the broad Fe line region (allowing a clean separation of the line into narrow and relativistically broadened components), and it will achieve higher S/N than Chandra at < 2keV, allowing the dipping events to be temporally resolved and spectrally modeled on short time scales. (RGS will have better spectral resolution than HETGS when both are binned to equal S/N on short time scales.) The Chandra data will provide high resolution spectroscopy of the dipping events, while RXTE - available via our ongoing monitoring campaign - will provide the hard X-ray continuum.

R.A. Dec. Target Name Det. Grating Exp.Time
19:58:21.70 35:12:05.30 Cyg X-1 ACIS-S HETG 50

Subject Category: BH AND NS BINARIES

Proposal Number: 09400003

Title: Monitoring Observations of the Galactic Center Region

PI Name: Rudy Wijnands

Type: GO

We propose to continue our XMM-Newton and Chandra monitoring campaign of the inner 1.2 square degree region centered on Sgr A*. We will be able to detect very faint transients in this region with a peak luminosity of 1E33 - 1E35 ergs/s, 10-1000 times more sensitive than would be possible with other satellites (i.e., RXTE and INTEGRAL}. This allows us to observe a very poorly studied group of transients and to follow the luminosity behavior of faint (1E36 ergs/s) persistent sources.

R.A. Dec. Target Name Det. Grating Exp.Time
17:43:52.10 -29:00:23.40 GC-5 HRC-I NONE 5
17:44:40.20 -29:21:30.60 GC-7 HRC-I NONE 5
17:44:51.90 -28:39:05.10 GC-4 HRC-I NONE 5
17:45:40.00 -29:00:11.00 GC-2 HRC-I NONE 5
17:46:27.60 -29:21:08.70 GC-6 HRC-I NONE 5
17:46:39.40 -28:38:49.80 GC-1 HRC-I NONE 5

Subject Category: BH AND NS BINARIES

Proposal Number: 09400014

Title: Chandra follow-up of a weak persistent source found in INTEGRAL maps: IGR J17204-3554

PI Name: Mariano Mendez

Type: GTO/ALTERNATE

We propose to observe IGR J17204-3554 for 1 ksec exposure with the ACIS-I to obtain a sub-arcsec position of the X-ray source in combination with spectral characteristics. The unique Chandra positional capabilities will allow for an optical follow-up study, which is of paramount importance for the classification of the source.

R.A. Dec. Target Name Det. Grating Exp.Time
17:20:25.00 -35:53:31.20 IGR J17204-3554 ACIS-I NONE 1

Subject Category: BH AND NS BINARIES

Proposal Number: 09400018

Title: Chandra follow-up of weak persistent sources found in INTEGRAL maps

PI Name: Mariano Mendez

Type: GTO/TOO

We propose to obtain a 1 ksec exposure of up to 2 newly found unclassified INTEGRAL sources which are weak persistent X-ray sources (we exclude from this proposal the bright new transients discovered by INTEGRAL). The unique Chandra positional capabilities will allow for an optical follow-up study. Follow-up observations are of paramount importance for the classification of the sources (e.g. as HMXBs/LMXBs, pulsars and pulsar wind nebula, or in a few rare cases as AXP/SGR or INS).

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 IGR persisent weak ToO ACIS-I NONE 1
0:00:00.00 0:00:00.00 IGR persisent weak ToO ACIS-I NONE 1

Subject Category: BH AND NS BINARIES

Proposal Number: 09400019

Title: Chandra follow-up of a weak persistent source found in INTEGRAL maps

PI Name: Mariano Mendez

Type: GTO

We propose to observe XTE J1716-389 for 1 ksec exposure with the ACIS-I to obtain a sub-arcsec position of the X-ray source in combination with its X-ray spectral characteristics. The unique Chandra positional capabilities will allow for an optical follow-up study, which is of paramount importance for the classification of the source.

R.A. Dec. Target Name Det. Grating Exp.Time
17:15:39.60 -38:52:30.00 XTE J1716-389 ACIS-I NONE 1

Subject Category: BH AND NS BINARIES

Proposal Number: 09400020

Title: The Galactic Bulge Survey: categorising the plethora of faint X-ray sources in the Galactic Bulge

PI Name: Mariano Mendez

Type: GTO

We propose to image an area of 6x1 degrees centered on the Galactic Center at |b|=1.5 degrees. Here, we propose to obtain ~25% of this as part of SRON's GTO program. These regions have been selected because of their lower extinction and crowding in the optical and near-infrared than in the Galactic Center area, while still having a high density of X-ray sources. We will detect a plethora of faint X-ray sources that will constrain binary evolution models by way of a number count and by identifying predicted X-ray binary types that so far have eluded identification. Source identifications will be boosted by our obtained optical data. We expect to find (quiescent) eclipsing neutron star and black hole LMXBs. These are important for neutron star and black hole mass measurements.

R.A. Dec. Target Name Det. Grating Exp.Time
17:36:25.50 -29:19:15.20 GBSGTO6 ACIS-I NONE 2
17:36:25.50 -29:19:15.20 GBSGTO6 ACIS-I NONE 2
17:36:25.50 -29:19:15.20 GBSGTO6 ACIS-I NONE 2
17:36:25.50 -29:19:15.20 GBSGTO6 ACIS-I NONE 2
17:36:25.50 -29:19:15.20 GBSGTO6 ACIS-I NONE 2
17:36:25.50 -29:19:15.20 GBSGTO6 ACIS-I NONE 2
17:36:25.50 -29:19:15.20 GBSGTO6 ACIS-I NONE 2
17:36:25.50 -29:19:15.20 GBSGTO6 ACIS-I NONE 2
17:36:25.50 -29:19:15.20 GBSGTO6 ACIS-I NONE 2
17:36:25.50 -29:19:15.20 GBSGTO6 ACIS-I NONE 2
17:36:25.50 -29:19:15.20 GBSGTO6 ACIS-I NONE 2
17:37:29.20 -29:19:46.50 GBSGTO5 ACIS-I NONE 2
17:37:29.20 -29:19:46.50 GBSGTO5 ACIS-I NONE 2
17:37:29.20 -29:19:46.50 GBSGTO5 ACIS-I NONE 2
17:37:29.20 -29:19:46.50 GBSGTO5 ACIS-I NONE 2
17:37:29.20 -29:19:46.50 GBSGTO5 ACIS-I NONE 2
17:37:29.20 -29:19:46.50 GBSGTO5 ACIS-I NONE 2
17:37:29.20 -29:19:46.50 GBSGTO5 ACIS-I NONE 2
17:37:29.20 -29:19:46.50 GBSGTO5 ACIS-I NONE 2
17:37:29.20 -29:19:46.50 GBSGTO5 ACIS-I NONE 2
17:37:29.20 -29:19:46.50 GBSGTO5 ACIS-I NONE 2
17:37:29.20 -29:19:46.50 GBSGTO5 ACIS-I NONE 2
17:37:58.50 -29:32:07.70 GBSGTO4 ACIS-I NONE 2
17:37:58.50 -29:32:07.70 GBSGTO4 ACIS-I NONE 2
17:37:58.50 -29:32:07.70 GBSGTO4 ACIS-I NONE 2
17:37:58.50 -29:32:07.70 GBSGTO4 ACIS-I NONE 2
17:37:58.50 -29:32:07.70 GBSGTO4 ACIS-I NONE 2
17:37:58.50 -29:32:07.70 GBSGTO4 ACIS-I NONE 2
17:37:58.50 -29:32:07.70 GBSGTO4 ACIS-I NONE 2
17:37:58.50 -29:32:07.70 GBSGTO4 ACIS-I NONE 2
17:37:58.50 -29:32:07.70 GBSGTO4 ACIS-I NONE 2
17:37:58.50 -29:32:07.70 GBSGTO4 ACIS-I NONE 2
17:37:58.50 -29:32:07.70 GBSGTO4 ACIS-I NONE 2
17:43:35.60 -26:47:49.40 GBSGTO3 ACIS-I NONE 2
17:43:35.60 -26:47:49.40 GBSGTO3 ACIS-I NONE 2
17:43:35.60 -26:47:49.40 GBSGTO3 ACIS-I NONE 2
17:43:35.60 -26:47:49.40 GBSGTO3 ACIS-I NONE 2
17:43:35.60 -26:47:49.40 GBSGTO3 ACIS-I NONE 2
17:43:35.60 -26:47:49.40 GBSGTO3 ACIS-I NONE 2
17:43:35.60 -26:47:49.40 GBSGTO3 ACIS-I NONE 2
17:43:35.60 -26:47:49.40 GBSGTO3 ACIS-I NONE 2
17:43:35.60 -26:47:49.40 GBSGTO3 ACIS-I NONE 2
17:43:35.60 -26:47:49.40 GBSGTO3 ACIS-I NONE 2
17:43:35.60 -26:47:49.40 GBSGTO3 ACIS-I NONE 2
17:44:05.00 -27:00:05.20 GBSGTO2 ACIS-I NONE 2
17:44:05.00 -27:00:05.20 GBSGTO2 ACIS-I NONE 2
17:44:05.00 -27:00:05.20 GBSGTO2 ACIS-I NONE 2
17:44:05.00 -27:00:05.20 GBSGTO2 ACIS-I NONE 2
17:44:05.00 -27:00:05.20 GBSGTO2 ACIS-I NONE 2
17:44:05.00 -27:00:05.20 GBSGTO2 ACIS-I NONE 2
17:44:05.00 -27:00:05.20 GBSGTO2 ACIS-I NONE 2
17:44:05.00 -27:00:05.20 GBSGTO2 ACIS-I NONE 2
17:44:05.00 -27:00:05.20 GBSGTO2 ACIS-I NONE 2
17:44:05.00 -27:00:05.20 GBSGTO2 ACIS-I NONE 2
17:44:05.00 -27:00:05.20 GBSGTO2 ACIS-I NONE 2
17:45:07.30 -27:00:22.40 GBSGTO1 ACIS-I NONE 2
17:45:07.30 -27:00:22.40 GBSGTO1 ACIS-I NONE 2
17:45:07.30 -27:00:22.40 GBSGTO1 ACIS-I NONE 2
17:45:07.30 -27:00:22.40 GBSGTO1 ACIS-I NONE 2
17:45:07.30 -27:00:22.40 GBSGTO1 ACIS-I NONE 2
17:45:07.30 -27:00:22.40 GBSGTO1 ACIS-I NONE 2
17:45:07.30 -27:00:22.40 GBSGTO1 ACIS-I NONE 2
17:45:07.30 -27:00:22.40 GBSGTO1 ACIS-I NONE 2
17:45:07.30 -27:00:22.40 GBSGTO1 ACIS-I NONE 2
17:45:07.30 -27:00:22.40 GBSGTO1 ACIS-I NONE 2
17:45:07.30 -27:00:22.40 GBSGTO1 ACIS-I NONE 2

Subject Category: BH AND NS BINARIES

Proposal Number: 09400055

Title: HETG Observations of the Accretion Disk Corona Source X1822-371

PI Name: Claude Canizares

Type: GTO

X1822-371 is the prototype of the Accretion Disk Corona (ADC) sources, i.e., near edge-on low mass X-ray binaries where the primary emission is observed via scattering in a very spatially extended corona, and we are viewing the X-ray source partially eclipsed/absorbed by the atmosphere of the outer accretion disk. We therefore propose Chandra High Energy Transmission Gratings (HETG) observations to obtain line diagnostics of the disk atmosphere and structure. Our observations are designed to go substantially deeper than the existing archive observation, i.e., doubling the signal-to-noise, and thus providing a "legacy" dataset for HETG observations of ADC.

R.A. Dec. Target Name Det. Grating Exp.Time
18:25:46.70 -37:06:18.90 X1822-371 ACIS-S HETG 150

Subject Category: BH AND NS BINARIES

Proposal Number: 09400117

Title: Transient LMXBs in Globular Clusters: More Numerous Than We Thought?

PI Name: David Pooley

Type: TOO

Since the discovery of globular cluster LMXBs in the 1970s, it was assumed that there was only one bright LMXB per cluster. Deep Chandra observations of several globular clusters have revealed that they contain numerous quiescent LMXB systems, any of which could go into outburst. Our observations will determine whether new outbursts from transient LMXBs in NGC 6440, Terzan 5, and Terzan 1 are from the same sources that were previously seen in outburst.

R.A. Dec. Target Name Det. Grating Exp.Time
17:35:47.20 -30:28:54.00 Terzan 1 ACIS-S NONE 10
17:48:04.90 -24:46:45.00 Terzan 5 ACIS-S NONE 10
17:48:52.70 -20:21:37.00 NGC 6440 ACIS-S NONE 2.5

Subject Category: BH AND NS BINARIES

Proposal Number: 09400125

Title: X-Ray Jets in Microquasars

PI Name: Stephane Corbel

Type: TOO

We propose Target of Opportunity (ToO) observations for detailed studies of X-ray jets from microquasars. We describe our discovery of radio/X-ray jets in two microquasars, why X-ray jets are probably much more common than previously thought, and transient X-ray jets offer an exciting new way to probe the physics of relativistic jets from black holes. The proposed ToO observations are optimized to discover and study (flux evolution, morphology, SED, proper motion, ...) of new X-ray jets from microquasars, triggered by their detection as radio lobes. This will have implications not only for the study of jets from Galactic X-ray binaries, but also for our understanding of relativistic jets from active galactic nuclei (AGN).

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 X-ray Jets ACIS-S NONE 30
0:00:00.00 0:00:00.00 X-ray Jets ACIS-S NONE 40
0:00:00.00 0:00:00.00 X-ray Jets ACIS-S NONE 40
0:00:00.00 0:00:00.00 X-ray Jets ACIS-S NONE 40

Subject Category: BH AND NS BINARIES

Proposal Number: 09400192

Title: Crustal cooling in quiescent neutron stars

PI Name: Edward Cackett

Type: GO

We propose a 30 ksec observation of each of the quasi-persistent neutron-star low-mass X-ray transients KS 1731-260 and MXB 1659-29 in quiescence. The long outbursts in both of these sources heated the neutron star crust out of thermal equilibrium with the core. We have tracked the cooling of the neutron star crusts in both objects since they went in quiescence. We have preliminary evidence that the cooling has ceased, perhaps indicating that the crust is in equilibrium with the core. Our proposed observations will test the equilibrium suggestion, by placing tight limits on residual cooling and/or residual accretion, and determine the core temperature, constraining the equation of state of dense matter.

R.A. Dec. Target Name Det. Grating Exp.Time
17:02:06.50 -29:56:44.10 MXB 1659-29 ACIS-S NONE 30

Subject Category: BH AND NS BINARIES

Proposal Number: 09400196

Title: The Galactic Bulge Survey: categorising the plethora of faint X-ray sources in the Galactic Bulge

PI Name: Peter Jonker

Type: GO

We propose to image an area of 6x1 degrees centered on the Galactic Center at |b|=1.5 degrees: the Galactic Bulge Survey. 25% of this area will be observed as an SRON GTO program in AO9. We here propose for another 25%. These regions have been selected because of their lower extinction and crowding in the optical and near-infrared than in the Galactic Center area, while still having a high density of X-ray sources. We will detect a plethora of faint X-ray sources that will constrain binary evolution models by way of a number count and by identifying predicted X-ray binary types that so far have eluded identification. We expect to find (quiescent) eclipsing neutron star and black hole LMXBs. These are important for neutron star and black hole mass measurements.

R.A. Dec. Target Name Det. Grating Exp.Time
17:46:37.20 -30:41:42.40 GBS1 ACIS-S NONE 2
17:46:37.20 -30:41:42.40 GBS1 ACIS-S NONE 2
17:46:37.20 -30:41:42.40 GBS1 ACIS-S NONE 2
17:46:37.20 -30:41:42.40 GBS1 ACIS-S NONE 2
17:46:37.20 -30:41:42.40 GBS1 ACIS-S NONE 2
17:46:37.20 -30:41:42.40 GBS1 ACIS-S NONE 2
17:46:37.20 -30:41:42.40 GBS1 ACIS-S NONE 2
17:46:37.20 -30:41:42.40 GBS1 ACIS-S NONE 2
17:46:37.20 -30:41:42.40 GBS1 ACIS-S NONE 2
17:46:37.20 -30:41:42.40 GBS1 ACIS-S NONE 2
17:46:37.20 -30:41:42.40 GBS1 ACIS-S NONE 2
17:47:41.90 -30:41:55.10 GBS1 ACIS-S NONE 2
17:47:41.90 -30:41:55.10 GBS1 ACIS-S NONE 2
17:47:41.90 -30:41:55.10 GBS1 ACIS-S NONE 2
17:47:41.90 -30:41:55.10 GBS1 ACIS-S NONE 2
17:47:41.90 -30:41:55.10 GBS1 ACIS-S NONE 2
17:47:41.90 -30:41:55.10 GBS1 ACIS-S NONE 2
17:47:41.90 -30:41:55.10 GBS1 ACIS-S NONE 2
17:47:41.90 -30:41:55.10 GBS1 ACIS-S NONE 2
17:47:41.90 -30:41:55.10 GBS1 ACIS-S NONE 2
17:47:41.90 -30:41:55.10 GBS1 ACIS-S NONE 2
17:47:41.90 -30:41:55.10 GBS1 ACIS-S NONE 2
17:48:12.80 -30:54:07.60 GBS1 ACIS-S NONE 2
17:48:12.80 -30:54:07.60 GBS1 ACIS-S NONE 2
17:48:12.80 -30:54:07.60 GBS1 ACIS-S NONE 2
17:48:12.80 -30:54:07.60 GBS1 ACIS-S NONE 2
17:48:12.80 -30:54:07.60 GBS1 ACIS-S NONE 2
17:48:12.80 -30:54:07.60 GBS1 ACIS-S NONE 2
17:48:12.80 -30:54:07.60 GBS1 ACIS-S NONE 2
17:48:12.80 -30:54:07.60 GBS1 ACIS-S NONE 2
17:48:12.80 -30:54:07.60 GBS1 ACIS-S NONE 2
17:48:12.80 -30:54:07.60 GBS1 ACIS-S NONE 2
17:48:12.80 -30:54:07.60 GBS1 ACIS-S NONE 2
17:53:38.20 -28:08:16.30 GBS1 ACIS-S NONE 2
17:53:38.20 -28:08:16.30 GBS1 ACIS-S NONE 2
17:53:38.20 -28:08:16.30 GBS1 ACIS-S NONE 2
17:53:38.20 -28:08:16.30 GBS1 ACIS-S NONE 2
17:53:38.20 -28:08:16.30 GBS1 ACIS-S NONE 2
17:53:38.20 -28:08:16.30 GBS1 ACIS-S NONE 2
17:53:38.20 -28:08:16.30 GBS1 ACIS-S NONE 2
17:53:38.20 -28:08:16.30 GBS1 ACIS-S NONE 2
17:53:38.20 -28:08:16.30 GBS1 ACIS-S NONE 2
17:53:38.20 -28:08:16.30 GBS1 ACIS-S NONE 2
17:53:38.20 -28:08:16.30 GBS1 ACIS-S NONE 2
17:54:09.00 -28:20:24.10 GBS1 ACIS-S NONE 2
17:54:09.00 -28:20:24.10 GBS1 ACIS-S NONE 2
17:54:09.00 -28:20:24.10 GBS1 ACIS-S NONE 2
17:54:09.00 -28:20:24.10 GBS1 ACIS-S NONE 2
17:54:09.00 -28:20:24.10 GBS1 ACIS-S NONE 2
17:54:09.00 -28:20:24.10 GBS1 ACIS-S NONE 2
17:54:09.00 -28:20:24.10 GBS1 ACIS-S NONE 2
17:54:09.00 -28:20:24.10 GBS1 ACIS-S NONE 2
17:54:09.00 -28:20:24.10 GBS1 ACIS-S NONE 2
17:54:09.00 -28:20:24.10 GBS1 ACIS-S NONE 2
17:54:09.00 -28:20:24.10 GBS1 ACIS-S NONE 2
17:55:12.20 -28:20:24.30 GBS1 ACIS-S NONE 2
17:55:12.20 -28:20:24.30 GBS1 ACIS-S NONE 2
17:55:12.20 -28:20:24.30 GBS1 ACIS-S NONE 2
17:55:12.20 -28:20:24.30 GBS1 ACIS-S NONE 2
17:55:12.20 -28:20:24.30 GBS1 ACIS-S NONE 2
17:55:12.20 -28:20:24.30 GBS1 ACIS-S NONE 2
17:55:12.20 -28:20:24.30 GBS1 ACIS-S NONE 2
17:55:12.20 -28:20:24.30 GBS1 ACIS-S NONE 2
17:55:12.20 -28:20:24.30 GBS1 ACIS-S NONE 2
17:55:12.20 -28:20:24.30 GBS1 ACIS-S NONE 2
17:55:12.20 -28:20:24.30 GBS1 ACIS-S NONE 2

Subject Category: BH AND NS BINARIES

Proposal Number: 09400208

Title: Following a black hole candidate X-ray transient to quiescence

PI Name: Peter Jonker

Type: TOO

There is increasing evidence that the quiescent state of BH X-ray binaries is different from the hard state that is observed at higher luminosities. Our recent Chandra campaigns on BH transient decays suggest that a transition takes place when the luminosity suddenly drops by almost three orders of magnitude during a period of only a few weeks. This transition has so far not been resolved, but there is strong evidence that the spectrum softens during this rapid decay. Both the decay and spectral evolution can provide important constraints for jet-dominated and ADAF-like models. We propose a more refined program than before and request 6 simultaneous Chandra/VLA TOO observations that aim to cover this rapid transition in full detail for the first time with X-ray and radio observations.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 TOO ACIS-S HETG 7
0:00:00.00 0:00:00.00 TOO ACIS-S HETG 7
0:00:00.00 0:00:00.00 TOO ACIS-S HETG 7
0:00:00.00 0:00:00.00 TOO ACIS-S HETG 15
0:00:00.00 0:00:00.00 TOO ACIS-S HETG 35
0:00:00.00 0:00:00.00 TOO ACIS-S HETG 100

Subject Category: BH AND NS BINARIES

Proposal Number: 09400224

Title: High Resolution Spectroscopy of GRS 1915+105 in the 'Soft' State

PI Name: Yoshihiro Ueda

Type: TOO

We propose to perform a TOO observation of GRS 1915+105 in the soft state with Chandra/HETGS. Investigation of iron-K absorption lines provide us with powerful diagnostics of highly ionized plasma associated with the accretion flow of microquasars. Although such features were discovered firstly from superluminal sources, the nature of the highly ionized plasma in GRS 1915+105 and its possible relation to relativistic jet ejection still remains unclear. This is because the source stays mostly in the low/hard state, where the ions are fully ionized by the strong hard X-ray flux and a very weak feature from H-like Fe ions is observable. Previous ASCA observations indicate that the iron-K absorption features become prominent in this state, thus best suited for detailed plasma diagnostics.

R.A. Dec. Target Name Det. Grating Exp.Time
19:15:11.60 10:56:44.90 GRS 1915+105 ACIS-S HETG 50

Subject Category: BH AND NS BINARIES

Proposal Number: 09400231

Title: ToO observation of a new bright transient discovered by GLAST and Swift in the Galactic plane

PI Name: Isabelle Grenier

Type: TOO

We propose a TOO observation of a new intense transient detected by GLAST-LAT and followed by a Swift-XRT detection, at |b|<5 deg. Our goal is to determine the nature of an event similar to the intense, non-blazar, transient that EGRET saw in the Galactic plane once in its lifetime. The lack of a radio-loud source and of a known X-ray binary in the error box indicates either a new facet of Galactic compact objects or a new manifestation of a non-blazar active galaxy behind the Milky way. A significant XRT detection of a counterpart will trigger the proposed 30 ks Chandra observation to precisely locate the source in crowded Galactic regions, to constrain the X-ray decay time, and to measure the source spectrum and absorption.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 GLAST Transient ACIS-S NONE 30

Subject Category: BH AND NS BINARIES

Proposal Number: 09400314

Title: Photoionization in the Microquasar Circinus X-1

PI Name: Norbert Schulz

Type: GO

We propose to reobserve the X-ray binary Circinus X-1 for a total of 35 ks within an orbital phase window of 0.96 - 0.99 within its 16.5 day orbital cycle using the HETGS. Circinus~X-1 is currently in a low flux state with respect to its longterm (30 yr) lightcurve. A short previous observation of the source at this phase revealed a remarkable emission line spectrum rich in high Z K-shell lines from Si, S, Ar, Ca, and Fe. While the overall spectrum was successfully modeled using the most recent version of the photoionization code XSTAR, we encountered problems in the modeling of specific lines which to a large extent are related to the short exposure and shortcomings in the instrumental setup.

R.A. Dec. Target Name Det. Grating Exp.Time
15:20:41.00 -57:10:00.00 Cir X-1 ACIS-S HETG 35

Subject Category: BH AND NS BINARIES

Proposal Number: 09400351

Title: Crust cooling of HETE J1900.1-2455 and Swift J1626.6-5156

PI Name: Nathalie Degenaar

Type: TOO

We propose Chandra ToO observations of the two neutron star quasi-persistent X-ray binaries HETE J1900.1-2455 and Swift J1626.6-5156 in quiescence. Currently, both sources exhibit an outburst phase that started about 1.5 years ago. Neutron stars that undergo such a prolonged accretion period serve perfectly to study their cooling behavior, which depends sensitively on stellar parameters such as composition and compactness. We want to explore the effect of a strong magnetic field on the thermal evolution of transiently accreting neutron stars. Cooling models for neutron stars with a low magnetic field currently exist, and also magnetars are well studied. Our selected targets fall right in between this regime and can provide new physical input in the existing theory of cooling neutron stars.

R.A. Dec. Target Name Det. Grating Exp.Time
16:26:36.50 -51:56:30.60 Swift J1626.6-5156 ACIS-S NONE 20
16:26:36.50 -51:56:30.60 Swift J1626.6-5156 ACIS-S NONE 20
16:26:36.50 -51:56:30.60 Swift J1626.6-5156 ACIS-S NONE 20
19:00:08.70 -24:55:13.70 HETE J1900.1-2455 ACIS-S NONE 20
19:00:08.70 -24:55:13.70 HETE J1900.1-2455 ACIS-S NONE 20
19:00:08.70 -24:55:13.70 HETE J1900.1-2455 ACIS-S NONE 20

Subject Category: BH AND NS BINARIES

Proposal Number: 09400355

Title: Quasi-persistent neutron-star X-ray binaries in quiescence

PI Name: Rudy Wijnands

Type: TOO

We propose to observe the next (quasi-)persistent neutron-star low-mass X-ray binary that turns off and becomes quiescent. This will provide an excellent opportunity to study the effects of prolonged accretion on the neutron-star properties (i.e., crust and core and thus the properties of ultradense matter) and the quiescent properties of low-mass X-ray binaries. Two follow-up observations taken several months later will provide important information about the time evolution of the quiescent properties. In particular, if indeed the quiescent X-rays are emitted by the crust, we will be able to study its evolution in time,thus setting strong constraints on the crust cooling models and the exact structure of the crust.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 Quiescent source ACIS-S NONE 30
0:00:00.00 0:00:00.00 Quiescent source ACIS-S NONE 30
0:00:00.00 0:00:00.00 Quiescent source ACIS-S NONE 30

Subject Category: BH AND NS BINARIES

Proposal Number: 09400380

Title: First Chandra observation of the ultra-compact X-ray binary 4U~1850--087 during its high luminosity state

PI Name: DIEGO ALTAMIRANO

Type: TOO

4U~1850--087 is a candidate ultra-compact X-ray binary. A soft excess near 0.7 keV has been reported for this source with ASCA and interpreted as due to neutral Ne-rich material local to the binary. Recent XMM-Newton and Chandra observations of the source at low X-ray luminosity do not confirm the ASCA results and therefore different physical interpretations are possible. We propose at 30 ks Chandra LETGS observation of this source during its high luminosity state in order to understand how the luminosity affects the abundances observed in the X-ray spectrum.

R.A. Dec. Target Name Det. Grating Exp.Time
18:53:04.90 -8:42:20.40 4U 1850-087 ACIS-S LETG 30

Subject Category: BH AND NS BINARIES

Proposal Number: 09400397

Title: Monitoring observations of the Galactic Center region

PI Name: Rudy Wijnands

Type: GO

We propose to continue our Chandra and XMM-Newton monitoring campaign of the 1.2 square degree region centered on Sgr A*. We will be able to detect very faint transients with a peak luminosity of 1E33-1E35 ergs/s, 10-1000 times more sensitive than would be possible with other satellites. This allows us to observe a poorly studied group of transients and to follow the luminosity behavior of faint (1E34-1E36 ergs/s) persistent sources. The Chandra observations are necessary to facilitate rapid follow-up observations of the detected transients at IR and radio wavelengths; the XMM-Newton observations are needed to increase the likelihood of detecting transients in outburst and to obtain better constraints on the long-term time averaged accretion rates of the transients present in the FOV.

R.A. Dec. Target Name Det. Grating Exp.Time
17:43:52.10 -29:00:23.40 GC-5 HRC-I NONE 5
17:43:52.10 -29:00:23.40 GC-5 HRC-I NONE 5
17:44:40.20 -29:21:30.60 GC-7 HRC-I NONE 5
17:44:40.20 -29:21:30.60 GC-7 HRC-I NONE 5
17:44:51.90 -28:39:05.10 GC-4 HRC-I NONE 5
17:44:51.90 -28:39:05.10 GC-4 HRC-I NONE 5
17:45:40.00 -29:00:11.00 GC-2 HRC-I NONE 5
17:45:40.00 -29:00:11.00 GC-2 HRC-I NONE 5
17:46:27.60 -29:21:08.70 GC-6 HRC-I NONE 5
17:46:27.60 -29:21:08.70 GC-6 HRC-I NONE 5
17:46:39.40 -28:38:49.80 GC-1 HRC-I NONE 5
17:46:39.40 -28:38:49.80 GC-1 HRC-I NONE 5
17:47:27.00 -28:59:46.20 GC-3 HRC-I NONE 5
17:47:27.00 -28:59:46.20 GC-3 HRC-I NONE 5

Subject Category: BH AND NS BINARIES

Proposal Number: 09400409

Title: Faint persistent X-ray sources in the Galactic Bulge

PI Name: Marc Klein-Wolt

Type: GO

We propose short (1 ksec) observations with the HRC-I of a selection of faint persistent X-ray sources in the Galactic Bulge for which very little is know. These sources are detected in the PCA/RXTE bulge scan project at luminosities below 10^36 erg/sec and are most likely HMXB or LMXB; they are either Be/X-ray binaries, and hence candidates to show slow X-ray pulsations, or they are ultra-compact binaries in which the compact object is accreting from a degenarate donor and in which case they are candidates to show gravitational waves. The HRC observations will allow us to search for slow pulsations as well give for the first time an accurate position that will allow for optical/IR follow-up studies to determine the binary parameters.

R.A. Dec. Target Name Det. Grating Exp.Time
16:36:28.30 -47:49:36.80 K 1632-477 HRC-I NONE 1
17:18:23.00 -39:21:06.10 4U 1715-390 HRC-I NONE 1
17:34:06.70 -23:21:18.70 XTE J1734-234 HRC-I NONE 1
17:45:28.60 -32:41:38.40 EXO 1742-326 HRC-I NONE 1
18:03:22.00 -25:15:56.20 RXS J180326.2 HRC-I NONE 1
18:10:40.50 -10:52:19.60 4U 1807-10 HRC-I NONE 1
18:24:58.00 -13:11:17.90 GPS 1822-131 HRC-I NONE 1
18:41:42.00 -5:51:00.00 GS 1839-06 HRC-I NONE 1

Subject Category: BH AND NS BINARIES

Proposal Number: 09400414

Title: INVESTIGATING NEW INTEGRAL SOURCES WITH CHANDRA

PI Name: Adamantia Paizis

Type: TOO

We propose to trigger a maximum of 2 Chandra medium (4-12 days) ToO observations on new sources discovered by the INTEGRAL Observatory. We ask for 20 ksec per observation, using HETGS. The scientific aim is to determine the source position with subarcsecond accuracy that only Chandra can provide, enabling multiwavelength follow-up observations (coordinated within the proposing team), and to obtain the high resolution HETG X-Ray spectrum, essential to determine the nature of the new source. With this proposal we aim to continue the successful INTEGRAL-Chandra monitoring program started since Chandra AO5.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 New INTEGRAL source 1 ACIS-S HETG 20
0:00:00.00 0:00:00.00 New INTEGRAL source 1 ACIS-S HETG 20

Subject Category: BH AND NS BINARIES

Proposal Number: 09400441

Title: Chandra observations of an engimatic class of faint accreting slow pulsators

PI Name: Rudy Wijnands

Type: GO

We propose a series of 1 ksec Chandra observations of an enigmatic class of objects: faint to very faint accreting slow pulsators with period greater than several hundreds of seconds. The nature of these objects is unclear; likely they are neutron stars accreting from a high-mass companion star, but often an accreting magnetized white dwarf nature (i.e., an intermediate polar) cannot be excluded. With our proposed Chandra observations we will obtain a position of these sources which will be used to identify their optical/IR counterpart, crucial in determining the exact nature of these systems. In addition, we request short (5 ksec) XMM-Newton observations of the same targets which will result in good spectra and allow for searches to be undertaken for any spin-period derivatives.

R.A. Dec. Target Name Det. Grating Exp.Time
13:24:26.30 -62:00:53.00 SAX J1324.4-6200 ACIS-I NONE 1
14:52:49.30 -59:49:18.00 SAX J1452.8-5949 ACIS-I NONE 1
17:00:05.30 -41:57:44.00 AX J1700.1-4157 ACIS-I NONE 1
17:40:11.60 -28:47:48.00 AX J1740.1-2847 ACIS-I NONE 1
17:49:10.10 -27:25:16.00 AX J1749.2-2725 ACIS-I NONE 1
18:20:29.50 -14:34:24.00 AX J1820.5-1434 ACIS-I NONE 1
18:32:20.00 -8:40:30.00 AX J1832.3-0840 ACIS-I NONE 1

Subject Category: BH AND NS BINARIES

Proposal Number: 09400498

Title: TOO observation of the microquasar GRS 1915+105 in quiescence

PI Name: Paolo Soleri

Type: TOO

We propose a 40ks Chandra observation to detect the microquasar GRS 1915+105 in quiescence, should its current 15-year-long outburst end during the 9th Chandra observing cycle. This system has never been observed in quiescence: its properties suggest that its quiescent X-ray flux would be rather high, allowing a measurement of the spectrum and a test of models for quiescent emission in black-hole binaries. In addition, it will be possible to detect a fossil jet similar to that detected in the neutron star X-ray binary 4U 1755-33.

R.A. Dec. Target Name Det. Grating Exp.Time
19:15:11.60 10:56:44.00 GRS 1915+105 ACIS-I NONE 40

Subject Category: BH AND NS BINARIES

Proposal Number: 09400544

Title: Precise Localization of Neutron Star Soft X-ray Transients

PI Name: Deepto Chakrabarty

Type: TOO

We propose to observe four neutron star (NS) soft X-ray transients in outburst to obtain accurate source positions, continuing an ongoing successful program we initiated in Cycle 6. This continuing study will allow for the reobservation of such sources in future cycles to study the quiescent X-ray emission in NS SXTs. Recent results from Chandra and XMM suggest that the standard picture of NS SXT emission may not be as straightforward as previously thought. This proposal will increase the number of known SXTs with good positions, providing a more uniform sample of the population for future work.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 NS SXT HRC-S NONE 1
0:00:00.00 0:00:00.00 NS SXT HRC-S NONE 1
0:00:00.00 0:00:00.00 NS SXT HRC-S NONE 1
0:00:00.00 0:00:00.00 NS SXT HRC-S NONE 1

Subject Category: BH AND NS BINARIES

Proposal Number: 09400550

Title: High Resolution Spectroscopy of a Black Hole Transient

PI Name: Jon Miller

Type: TOO

We propose to continue our ongoing study of Galactic black hole transients in outburst in a streamlined form, via two (2) 30 ksec HETGS observations. This program has revealed relativistic Fe K disk lines, warm-absorber-like disk winds, and now a possible anti-correlation between winds and jets. Observations of a new transient outburst will permit a black hole spin constraint, and test connections between disks, winds, and jets as a function of accretion rate. We will support this program with a global multi-wavelength network of observatories.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 Black hole transient ACIS-S HETG 30
0:00:00.00 0:00:00.00 Black hole transient ACIS-S HETG 30

Subject Category: BH AND NS BINARIES

Proposal Number: 09400622

Title: The Nature of the Intermediate-Luminosity X-ray Sources in Globular Clusters

PI Name: Craig Heinke

Type: GO

We propose short observations of four globular clusters seen to contain relatively bright (L_X[0.5-7 keV]=5x10^33 to 10^35 ergs/s) low-luminosity X-ray sources by Einstein, ROSAT and/or Chandra HRC observations. These objects are either extremely bright cataclysmic variables in unusual accretion states, or quiescent low-mass X-ray binaries showing very low-level accretion activity. With 5 to 10-ksec snapshots, we will constrain the luminosities, spectra, positions, and nature of each object.

R.A. Dec. Target Name Det. Grating Exp.Time
4:46:05.90 31:22:51.00 Palomar 2 ACIS-S NONE 10
5:24:10.60 -24:31:27.30 NGC 1904 ACIS-S NONE 10
15:03:58.50 -33:04:03.90 NGC 5824 ACIS-S NONE 10
18:35:45.70 -32:59:25.10 NGC 6652 ACIS-S NONE 5

Subject Category: BH AND NS BINARIES

Proposal Number: 09400640

Title: Observations during the rare dips observed on the X-ray binary SLX 1735--269

PI Name: DIEGO ALTAMIRANO

Type: TOO

SLX~1735--269 is a (candidate) ultra-compact X-ray binary. It is a persistent source which shows rare dips that cannot be explain as periodic obscuration by material located in a thickened outer region of the accretion disk due to its interaction with the inflowing gas stream from the companion. We propose to observe this source for 10~ksec during one of its dips in order to understand if the accretion on the compact object ceases, or remains at very low levels undetectable with RXTE. The observations will also allow us to estimate the temperature of the neutron star crust.

R.A. Dec. Target Name Det. Grating Exp.Time
17:38:16.00 -27:00:16.00 SLX 1735-269 ACIS-I NONE 10

Subject Category: BH AND NS BINARIES

Proposal Number: 09400681

Title: Understanding the nature of high inclination low mass X-ray binaries: broad-band and line spectra from A1744-361

PI Name: Tod Strohmayer

Type: TOO

We propose to observe the transient dipping LMXB system A1744-361 during an outburst with Chandra HETGS, and contemporaneously with RXTE PCA. This will be the first observation of A1744-361 with a high resolution spectral instrument, and will facilitate; (1) sigficant detection of narrow spectral lines for the first time from A1744-361, (2) detection and line profile measurement of its broad iron emisson line, (3) unambiguous determination of source orbital period, (4) unambiguous determination of source position, (5) sigficant detection of kHz QPOs, and (6) understanding of the ionized plasma in the immediate environs of A1744-361, and dippers in general. These science goals rely on the unique qualities of Chandra (e.g., high spectral and angular resolution) and RXTE.

R.A. Dec. Target Name Det. Grating Exp.Time
17:48:13.10 -36:07:58.20 A1744-361 ACIS-S HETG 80

Subject Category: BH AND NS BINARIES

Proposal Number: 09400783

Title: From Super-Eddington to zero: following a Z source into quiescence

PI Name: Jeroen Homan

Type: TOO

XTE J1701-462 is probably the most luminous Galactic transient neutron star LMXB (NSXB) in the history of X-ray astronomy. Early observations have already clarified our view on the role of mass accretion rate in NSXBs. Observing XTE J1701-462 as it returns to quiescence will create a unique opportunity to study the effects of mass-accretion rate on the spectral/variability properties in a single NSXB over an unprecedented luminosity range. We propose a Chandra/XMM-Newton TOO program with two goals: 1) observe the source during the end of the decay and in quiescence, to complete what might well become a 'Rosetta stone' for NSXBs and 2) constrain the structure of neutron stars by studying the effects of near-Eddington accretion on the cooling of the crust/core in transient NSXBs.

R.A. Dec. Target Name Det. Grating Exp.Time
17:00:56.00 -46:10:07.00 XTE J1701-462 ACIS-S NONE 5
17:00:56.00 -46:10:07.00 XTE J1701-462 ACIS-S NONE 10
17:00:56.00 -46:10:07.00 XTE J1701-462 ACIS-S NONE 20
17:00:56.00 -46:10:07.00 XTE J1701-462 ACIS-S NONE 30
17:00:56.00 -46:10:07.00 XTE J1701-462 ACIS-S NONE 40

Subject Category: BH AND NS BINARIES

Proposal Number: 09400813

Title: Localization and Spectra of INTEGRAL-Selected Sources in the Galactic Plane

PI Name: John Tomsick

Type: GO

The INTEGRAL satellite is discovering a large number of new hard X-ray sources in the Galactic plane. In most cases, the few arcminute INTEGRAL positions do not allow for identification of these IGR sources at other wavelengths, leaving their nature unclear. Chandra can make a major contribution to studies of IGR sources by localizing the sources to allow for the identification of multi-wavelength counterparts and by constraining their soft X-ray spectra. Many of the IGR sources that have been identified are High-Mass X-ray Binaries (HMXBs) with interesting properties. We propose for relatively short Chandra observations of 24 unidentified IGR sources in the Galactic plane to search for HMXBs or other unusual Galactic sources.

R.A. Dec. Target Name Det. Grating Exp.Time
7:29:30.00 -13:09:29.00 IGR J07295-1329 ACIS-I NONE 5
9:48:29.00 -47:25:37.00 IGR J09485-4726 ACIS-I NONE 5
11:09:46.00 -64:56:46.00 IGR J11098-6457 ACIS-I NONE 5
13:18:36.00 -62:56:46.00 IGR J13186-6257 ACIS-I NONE 5
14:00:37.00 -63:26:49.00 IGR J14003-6326 ACIS-I NONE 5
14:33:26.00 -61:12:14.00 IGR J14331-6112 ACIS-I NONE 5
14:46:21.00 -64:17:38.00 IGR J14471-6414 ACIS-I NONE 5
15:52:56.00 -50:29:24.00 IGR J15529-5029 ACIS-I NONE 5
16:28:42.00 -50:20:38.00 IGR J16287-5021 ACIS-I NONE 5
17:35:21.00 -32:56:13.00 IGR J17354-3255 ACIS-I NONE 5
17:40:27.00 -36:54:47.00 IGR J17404-3655 ACIS-I NONE 5
17:44:55.00 -32:33:00.00 IGR J17448-3232 ACIS-I NONE 5
17:46:08.00 -22:03:32.00 IGR J17461-2204 ACIS-I NONE 5
17:48:41.00 -31:22:55.00 IGR J17487-3124 ACIS-I NONE 5
17:50:42.00 -26:47:31.00 IGR J17507-2647 ACIS-I NONE 5
17:58:38.00 -21:19:37.00 IGR J17586-2129 ACIS-I NONE 5
18:13:24.00 -16:35:53.00 IGR J18134-1636 ACIS-I NONE 5
18:17:19.00 -25:09:04.00 IGR J18173-2509 ACIS-I NONE 5
18:30:47.00 -12:31:55.00 IGR J18308-1232 ACIS-I NONE 5
18:48:28.00 -0:46:44.00 IGR J18485-0047 ACIS-I NONE 5
19:26:41.00 13:25:30.00 IGR J19267+1325 ACIS-I NONE 5
19:44:17.00 21:17:13.00 IGR J19443+2117 ACIS-I NONE 5

Subject Category: BH AND NS BINARIES

Proposal Number: 09400831

Title: Spectroscopy of a bright burst from 4U 1812-12

PI Name: Johannes in 't Zand

Type: TOO

Our goal is to measure with the HETGS a bright type-I X-ray burst with photospheric radius expansion (PRE), search for signatures of the ashes of nuclear burning and, if succesful, attempt a measurement of the gravitational redshift. The target, 4U 1812-12, is an ultracompact X-ray binary whose bursts are known to be consistently very bright, show strong PRE and are fairly predictable in occurrence. We request a joint RXTE observation to measure the neutron star spin via burst oscillations.

R.A. Dec. Target Name Det. Grating Exp.Time
18:15:06.20 -12:05:46.70 4U 1812-12 ACIS-S HETG 86

Subject Category: BH AND NS BINARIES

Proposal Number: 09400910

Title: Spitzer-Chandra ToO Observations of a Short Duration GRB

PI Name: Kevin Hurley

Type: TOO

We propose an ambitious multiwavelenth approach to the short GRB problem, leveraging Spitzer with Chandra as well as numerous ground−based telescopes. By measuring the broad−band spectrum of the afterglow and any concurrent "mini−supernova" over a wide range of wavelengths at several epochs, we can distinguish between models proposed to explain this type of burst. We will constrain the energetics of the explosion and the short GRB bursting rate (an important number for gravitational wave observatories), and measure with unprecedented detail the stellar content of a short burst host galaxy. Given the high impact nature of these observations and the rarity of short bursts, we are requesting multiepoch Target of Opportunity observations on a single event in Cycle 4.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 short grb ACIS-S NONE 10
0:00:00.00 0:00:00.00 short grb ACIS-S NONE 20

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500023

Title: Investigating possible magnetar-like outburst behaviour from high-B radio pulsars and XDINSs

PI Name: Mariano Mendez

Type: GTO/TOO

We propose a Chandra ACIS-S ToO observation of 10ks of any X-ray Dim Isolated Neutron Star (XDINS) and high magnetic field radio pulsar within 30 days from the detection of an increase (of an order of magnitude) of their soft X-ray, optical or radio flux. Radio and X-ray outbursts have been recently discovered from magnetars. This study is aimed at unveiling similarities between the high-B pulsar and XDINS classes with respect to the magnetar class, and consequently to understand their differences despite the common high magnetic fields (greater than the electron critical magnetic field). Through this Chandra observation we will study any timing and spectral variabilities connected with these outbursts.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 high-B pulsars and XDINSs ACIS-S NONE 10

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500026

Title: Galactic Supernova Remnant G272.2-3.2

PI Name: Gordon Garmire

Type: GTO

We propose to observe Galactic supernova remnant (SNR) G272.2-3.2. G272.2-3.2 is one of the SNRs discovered in X-rays, and has been suggested to a thermal composite SNR. However, the previous studies indicated that the properties of this SNR is extremely uncertain. The proposed Chandra observation will be useful to resolve many aspects of the uncertain nature of G272.2-3.2, including the origin of the SNR.

R.A. Dec. Target Name Det. Grating Exp.Time
9:06:47.00 -52:05:50.00 G272.2-3.2 ACIS-I NONE 65

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500030

Title: Snap-shot survey of potential GeV and TeV pulsars

PI Name: Gordon Garmire

Type: GTO

We propose to observe a number of energetic, young, radio pulsars that has not yet been studied in X-rays. The pulsars and their wind nebulae are especially interesting since they are expected to be the GeV and TeV sources detectable in the near future with the Glast and HESS observatories. In the short, 10 ks, exposures we expect to detect emission from the pulsars and PWNe in all cases. Obtained images and spectra will allow us to select the brightest, most interesting objects for more detailed follow-up studies.

R.A. Dec. Target Name Det. Grating Exp.Time
9:40:58.20 -54:28:40.60 J0940-5428 ACIS-I NONE 10
15:31:27.90 -56:10:55.00 J1531-5610 ACIS-I NONE 10
17:02:26.90 -43:10:40.00 J1702-4310 ACIS-I NONE 10
17:18:13.50 -38:25:18.00 J1718-3825 ACIS-I NONE 10
17:30:32.50 -33:50:39.40 J1730-3350 ACIS-I NONE 10
18:35:18.20 -11:06:15.10 J1835-1106 ACIS-I NONE 10
18:41:38.60 -3:48:42.60 J1841-0345 ACIS-I NONE 10
19:28:42.40 17:46:27.00 J1928+1746 ACIS-I NONE 10

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500037

Title: High Resolution HRC Imaging of Supernova Remnant 1987A

PI Name: Stephen Murray

Type: GTO

ACIS observations of SN 1987A have provided unique images of an evolving young supernova remnant. However, because the ACIS pixels undersample the PSF, these data cannot be used to derive robust measurements and uncertainties for parameters such as the radius and thickness of the emitting shell, nor can they quantitatively differentiate between geometries such as a thick shell or a tilted ring. We consequently propose an HRC observation of SN 1987A. When combined with ACIS and radio data from nearby epochs, the HRC data will allow a high fidelity reconstruction of the underlying morphology. Note that these HRC data complement rather than conflict with any Cycle 9 ACIS observation of SN 1987A, since ACIS data carry spectral information, while HRC data have superior spatial resolution.

R.A. Dec. Target Name Det. Grating Exp.Time
5:35:28.00 -69:16:11.00 SN 1987A HRC-I NONE 50

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500130

Title: The extreme late-time light curve of GRB 060729

PI Name: Dirk Grupe

Type: GO

Conflicting results from optical measurements on one hand and recent Swift X-ray observations on the other challenging the predictions from the standard 'fireball' model of Gamma-Ray Bursts (GRBs) that jet openning angles can be determined from the light curve's break times: While optical light curves suggest early break times and therefore small opening angles, the Swift XRT observations show no jet breaks in the majority of afterglow light curves, even weeks after the trigger. Here we propose to observe the bright X-ray afterglow of GRB 060729 twice with Chandra for 80 ks at the beginning and 120 ks at the end of the AO-9 to extend its light curve beyond any X-ray afterglow that has ever been observed, putting strong constrains on the opening angle and GRB theory.

R.A. Dec. Target Name Det. Grating Exp.Time
6:21:31.90 -62:22:12.50 GRB 060729 ACIS-S NONE 80
6:21:31.90 -62:22:12.50 GRB 060729 ACIS-S NONE 120

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500172

Title: The 'black-widow' pulsar in X-rays

PI Name: Vyacheslav Zavlin

Type: GO

We propose a deep observation of the "black-widow" eclipsing millisecond pulsar B1957+20 in a 33-ks orbital period binary system with a low-mass companion. The system is the only currently known example where the interactions of the pulsar wind with the interstellar medium and the wind from the companion have been observed. This was accomplished by a previous Chandra observation that lasted 43 ksec. These interactions are tools for elucidating properties of the relativistic wind which carries away the pulsar's rotational energy. Our study will provide much more detail for the physical properties of both the termination and intrabinary shocks and, hence, further insight into the nature of pulsar winds.

R.A. Dec. Target Name Det. Grating Exp.Time
19:59:36.80 20:48:15.00 PSR B1957+20 ACIS-S NONE 33
19:59:36.80 20:48:15.00 PSR B1957+20 ACIS-S NONE 33
19:59:36.80 20:48:15.00 PSR B1957+20 ACIS-S NONE 33
19:59:36.80 20:48:15.00 PSR B1957+20 ACIS-S NONE 33
19:59:36.80 20:48:15.00 PSR B1957+20 ACIS-S NONE 33

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500216

Title: Chandra Observations of Young, Energetic Supernovae

PI Name: David Pooley

Type: GO

In the entire history of X-ray astronomy, only about three dozen core-collapse supernovae (SNe) have been detected at ages of days to years old. Of these, only a handful have been well-followed temporally. Few general trends have emerged, and there is a clear need for better X-ray coverage at ages of ~years. Two SN subclasses stand out as deserving of particular attention, namely, the type Ib/c SNe, which have been associated with long-duration gamma-ray bursts, and the type IIn SNe, which are very poorly understood but have the highest X-ray luminosities seen in SNe. We propose observations of a number of interesting SNe of these subclasses at ages of years.

R.A. Dec. Target Name Det. Grating Exp.Time
0:41:26.80 25:29:51.60 SN 2005db ACIS-S NONE 5
3:17:27.10 41:24:19.50 SN 2006gy ACIS-S NONE 35
4:03:16.90 71:43:18.90 SN 2005kd ACIS-S NONE 5
9:17:20.80 41:54:32.70 SN 2006jc ACIS-S NONE 25
9:32:06.40 8:26:44.40 SN 2005ip ACIS-S NONE 5
13:50:25.00 68:33:19.40 SN 2005bx ACIS-S NONE 13
21:42:23.70 12:29:50.90 SN 2001em ACIS-S NONE 5

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500239

Title: A Deep Chandra Observation of SMC SNR 0104-72.3

PI Name: Sangwook Park

Type: GO

We propose to observe the supernova remnant (SNR) 0104-72.3 in the Small Magellanic Cloud (SMC). SNR 0104-72.3 is relatively faint and the X-ray images show ~arcsec scale substructure. There is also an X-ray point source within the SNR boundary. Furthermore, the origin of 0104-72.3 has been controversial between Type Ia and II. X-ray characteristics of 0104-72.3 make a deep Chandra ACIS observation the unique tool for the study of this SNR. Our proposed 120 ks ACIS observation would be useful to reveal the origin of 0104-72.3.

R.A. Dec. Target Name Det. Grating Exp.Time
1:06:16.00 -72:05:34.00 SNR 0104-72.3 ACIS-S NONE 120

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500297

Title: Timing PSR J1852+004 in Supernova Remnant Kes 79: Plan B

PI Name: Jules Halpern

Type: GO

Timing of PSR J1852+0040 in SNR Kes 79 has shown no change in its spin period. Its surface B is < 2x10^11 G in the dipole spin-down formalism, unique for a young, rotation-powered pulsar, and incompatible with its X-ray luminosity and pulse properties. Instead, it may be accreting supernova debris, in which case it can remain in a near-equilibrium spin with only random torque noise. We propose to continue our timing of PSR J1852+0040 to measure its P-dot and/or torque noise in order to decide between these models. In any model, PSR J1852+0040 must have a weak magnetic field, which may also explain the class of CCOs, e.g., 1E 1207.4-5209. In those pulsars born spinning slowly, the dynamo may generate a weaker field, which enables it to accrete.

R.A. Dec. Target Name Det. Grating Exp.Time
18:52:38.60 0:40:19.80 PSR J1852+0040 ACIS-S NONE 33
18:52:38.60 0:40:19.80 PSR J1852+0040 ACIS-S NONE 33

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500337

Title: Chandra Observations of New X-ray Supernovae

PI Name: David Pooley

Type: TOO

We propose to continue our X-ray studies of Type II and Type Ib/c supernovae (SNe). The Swift satellite has ushered in a new era of studying SNe in the X-rays, obtaining densely sampled X-ray lightcurves for the first time. However, its spatial resolution is often not good enough to separate a SN from nearby sources. We propose short Chandra observations to alleviate this. These observations will assess the X-ray environment of newly discovered Swift SNe to determine any possible source confusion or contamination of the SN flux. Our strategy makes the best use of the capabilities of each observatory.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 SN 1 ACIS-S NONE 10
0:00:00.00 0:00:00.00 SN 2 ACIS-S NONE 10
0:00:00.00 0:00:00.00 SN 3 ACIS-S NONE 10

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500381

Title: Phase-resolved Imaging of Compact Structures in a Pulsar Bow Shock

PI Name: Chi-Yung Ng

Type: GO

G359.23-0.82 ("the Mouse") is the ideal system for studying the physics of pulsar bow shock nebulae. However, ACIS observations of the Mouse offer little insight into compact nebular structures close to the pulsar, because of both pile-up and the likely presence of significant X-ray emission from the pulsar itself. We here propose an HRC-I observation of the Mouse, phase-resolved imaging from which will provide high-fidelity data on nebular structures close to the pulsar. With these data, we can identify possible wisps, jets, knots or other structures near or within the Mouse's termination shock, allowing us to compare the properties of the relativistic flow and particle acceleration process under a bow shock geometry to those seen in the well-studied "Crab-like" nebulae.

R.A. Dec. Target Name Det. Grating Exp.Time
17:47:15.90 -29:58:01.40 PSR J1747-5958 HRC-I NONE 60

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500446

Title: A Measurement of the Expansion Rate of SN 1006

PI Name: Robert Petre

Type: GO

We propose to make the first X-ray proper motion measurement of SN 1006, by taking an identical 70ks ACIS-S exposure of the bright NE rim to one taken 7 years ago. If X-ray expansion is comparable to radio, then the shock proper motion of 3000 km/s produces a shift of 7 ACIS pixels compared with the reference observation. Proper motion of thin (10 arcsec) nonthermal filaments and interior ejecta knots will be easily detected, as will brightness changes at the 10 percent level on 3-5 arcsec scales. Brightness changes in the nonthermal rims would arise from the influence of spatial variations in magnetic field strength on synchrotron loss timescales. SN 1006 is the best remnant in which to measure the proper motion of nonthermal shocks because it is nearby, bright, and has fast shocks.

R.A. Dec. Target Name Det. Grating Exp.Time
15:03:51.50 -41:51:19.00 SN 1006-NE revisit ACIS-S NONE 70

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500471

Title: A Deep Chandra Observation of G54.1+0.3

PI Name: Patrick Slane

Type: LP

Chandra observations of pulsar wind nebulae have revolutionized our understanding of these systems, revealing a wide variety of complex structures that all relate to the basic conversion of spin-down power to an axisymmetric wind with collimated outflows. Based on initial observations, G54.1+0.3 displays Doppler-brightened emission from the wind termination shock region, large-scale jets that form the elongated structure of the nebula, and faint emission that hints at a possible torus as well as large-scale filamentary structure. We propose a Chandra Large Project to obtain deep observations of G54.1+0.3 in order to resolve these structures, study their spectra, and derive properties related to flow conditions and the magnetic field structure of the nebula.

R.A. Dec. Target Name Det. Grating Exp.Time
19:30:30.20 18:52:14.20 G54.1+0.3 ACIS-S NONE 140
19:30:30.20 18:52:14.20 G54.1+0.3 ACIS-S NONE 160

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500479

Title: The X-ray Afterglow of a Gamma-ray Burst detected and localized with the AGILE gamma- and X-ray detectors

PI Name: Marco Feroci

Type: TOO

AGILE will be the first mission to observe GRBs in the range ≥ 30 MeV after the afterglow revolution, allowing the high energy emission to be studied for the first time in the frame of information derived from the afterglow, such as distance, host, decay law, .. We propose a 60 ks ToO observation of one AGILE GRB, observed in gamma-rays and arcmin localized at X-rays by SuperAGILE. The main scientific objectives are the arcsec localization of the X-ray counterpart, allowing for the first time ever an association of a gamma-ray emitting GRB with counterparts at other wavelengths (thus possibly with a redshift and a host galaxy), and the study of the X-ray afterglow, correlated to the observable prompt and/or delayed emission in the 30 MeV 50 GeV range.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 GRB ACIS-I NONE 10

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500556

Title: Determining the nature of the quasi-pointlike TeV source HESS J1858+020

PI Name: R gis Terrier

Type: GO

Most HESS sources are very extended objects for which counterparts are difficult to find. But all point like or quasi point like objects have rich X-ray counterparts. In particular, HESS J1813-178 has revealed a bright X-ray nebula enclosed in a radio shell. Recent Chandra observations have resolved a very energetic pulsar candidate in this nebula. We propose to observe the newly discovered quasi point like source HESS J1858+020, which is devoid of any X-ray observations. Its TeV spectral characteristics are very similar to those of HESS J1813-178, reminding a possible young pulsar wind nebula. We propose to test this hypothesis using a 30 ks ACIS-I pointing which should be able to reveal a pulsar wind nebula or on the contrary a possible compact source origin of the emission.

R.A. Dec. Target Name Det. Grating Exp.Time
18:58:16.00 2:02:25.00 HESS J1858+020 ACIS-I NONE 30

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500565

Title: Investigating the X-ray Variability of Cassiopeia A

PI Name: Daniel Patnaude

Type: GO

We propose a 50 ksec ACIS-S observation of Cas A to follow X-ray flux changes associated with ejecta recently encountered by the reverse shock. This will allow us to investigate Cas A's near-term X-ray evolution and the fine-scale structure of its SN debris. We also request the Chandra observation be followed by HST NICMOS & WFPC2 images of four identified X-ray variable features in the high ionization NIR lines of [Si VI] and [Si X] and low ionization optical lines of [S II] and [O III]. The proposed X-ray/optical/NIR observations will yield a multi-wavelength study of the remnant's advancing reverse shock in an inhomogeneous multi-phase ejecta medium at resolutions down to a fraction of an arcsecond, providing a hi-resolution broad temperature study of reverse shock heated SN ejecta.

R.A. Dec. Target Name Det. Grating Exp.Time
23:23:26.70 58:49:03.00 Cassiopeia A ACIS-S NONE 50

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500572

Title: Completing a Small Chandra Survey of Hard X-ray Sources in Gamma-Ray Error Boxes

PI Name: Mallory Roberts

Type: GO

Recent X-ray and radio studies of unidentified high-energy gamma-ray source error boxes (detected by EGRET) have yielded numerous likely counterparts. These have been young pulsars coincident with steady EGRET sources, rapidly moving pulsar wind nebulae coincident with variable EGRET sources, radio emitting Be X-ray binaries, background blazars, and associations of massive stars. We propose brief observations of the final 3 hard X-ray sources discovered in an ASCA survey of Galactic GeV source error boxes to determine if any are members of the above source classes or can be identified with other potential gamma-ray emitters. The precise positions from these observations may be important for successful blind searches for pulsations in data from GLAST.

R.A. Dec. Target Name Det. Grating Exp.Time
10:25:35.80 -57:56:47.00 AX J1025.6-5757 ACIS-I NONE 5
17:31:41.20 -31:15:28.00 AX J1731.7-3115 ACIS-I NONE 10
17:32:09.90 -30:43:49.00 AX J1732.2-3044 ACIS-I NONE 5

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500577

Title: A Search for X-ray Pulsations from Rotation-Powered Millisecond Pulsars

PI Name: Kent Wood

Type: GO

We propose HRC-S observations of 8 rotation-powered millisecond pulsars (RMSPs) to search for pulsations and measure fluxes. We show it is not possible to identify a single figure of merit that explains current detection patterns and prioritizes new searches. A blend of two figures of merit (successful with X-ray hard and thermal subclasses respectively) maximizes prospects for new detections. This survey will clarify the roles of X-ray and gamma-ray emission from RMSPs, and prepares for GeV observations with GLAST. The number of known X-ray RMSPs of the hard subclass could be doubled. Enlarging source counts is essential to understanding the characteristics of RMSPs seen in radio, X-rays, and gamma-rays.

R.A. Dec. Target Name Det. Grating Exp.Time
18:43:41.20 -11:13:31.00 PSR J1843-1113 HRC-S NONE 20
19:33:32.40 -62:11:46.80 PSR J1933-6211 HRC-S NONE 20

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500603

Title: Shock Interactions in the Supernova Remnant IC443

PI Name: Una Hwang

Type: GO

We propose two ACIS-I observations to obtain high-quality spectra and images of the bright northeast region of the supernova IC 443. We aim to identify coherent shock structures in conjunction with optical images, and to perform spatially resolved spectroscopy and spectral imaging. The northeast region of IC 443 is interacting with diffuse interstellar medium, atomic and molecular clouds at its various boundaries. We will explore compare the X-ray ane optical morphologies in detail, and measure the temperature and density structures of the X-ray emitting gas behind these different shock environments. We will also search for correlations with coronal [Fe X] and [Fe XIV] emission to look for signatures of cloud evaporation.

R.A. Dec. Target Name Det. Grating Exp.Time
6:17:12.90 22:47:22.00 IC 443 Northeast Field ACIS-I NONE 30
6:17:57.90 22:39:21.60 IC 443 East Field ACIS-I NONE 60

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500615

Title: The Peculiar X-Ray Evolution of Supernovae 1978K, 1979C and 1993J

PI Name: Stefan Immler

Type: GO

Supernovae (SNe) 1978K, 1979C, and 1993J are some of the brightest and best observed SNe in the X-ray regime. Over the past ~2 decades, SNe 1978K and 1979C have shown no evolution in X-rays, with high sustained (0.2-10 keV) luminosities around E39 ergs/s and high inferred mass-loss rates of the progenitors (>E-4 M_sun/year) over the last 40,000 years prior to their explosions. However, the latest Chandra, XMM-Newton and Swift observations show a dramatic decrease in their X-ray luminosities similar to that of SN 1993J. We propose Chandra observations to follow their fast rates of decline which will bring the long-term X-ray monitoring of these three SNe to a final closure.

R.A. Dec. Target Name Det. Grating Exp.Time
3:17:38.60 -66:33:03.40 SN1978K ACIS-S NONE 5
9:55:24.80 69:01:13.70 SN 1993J ACIS-S NONE 10
12:22:58.60 15:47:51.70 SN 1979C ACIS-S NONE 15

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500627

Title: ToO Observations of Soft Gamma Repeaters

PI Name: Peter Woods

Type: TOO

Soft Gamma Repeaters are rare sources of transient burst emission, probably magnetars (i.e. strongly magnetized neutron stars). Each of the SGRs has a persistent X-ray counterpart and some show coherent pulsations. During burst active phases, these counterparts undergo changes in their energy spectrum and pulse properties. Measuring the effects of burst activity are diagnostic of the burst mechanism and SGRs in general. In the event of detection of substantial burst activity from an SGR, we propose to make Chandra ToO observations of any of the four known sources, SGR 1900+14, SGR 1806-20, SGR 1627-41, SGR 0526-66, the SGR candidate SGR 1801-23, as well as any newly discovered SGR source.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 NEW SGR ACIS-I NONE 5
0:00:00.00 0:00:00.00 NEW SGR ACIS-S NONE 40
5:26:01.10 -66:04:38.00 SGR 0526-66 ACIS-S NONE 40
16:35:51.80 -47:35:23.30 SGR 1627-41 ACIS-S NONE 40
18:00:58.90 -22:56:48.50 SGR 1801-23 ACIS-I NONE 5
18:00:58.90 -22:56:48.50 SGR 1801-23 ACIS-S NONE 40
18:08:39.30 -20:24:39.50 SGR 1806-20 ACIS-S NONE 40
19:07:14.30 9:19:20.10 SGR 1900+14 ACIS-S NONE 40

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500628

Title: Measuring the Expansion Rate of G266.2-1.2

PI Name: Glenn Allen

Type: GO

We propose to reobserve the bright northwestern rim of G266.2-1.2 five years after our first observation of this region. The goal of the new observation is to measure the expansion rate of the remnant and constrain its age. The age of the remnant is controversial. Some report evidence of line emission associated with the decay to titanium-44, which implies that the remnant must be young (< 1200 yr). Others find no such evidence and argue that the absorption column density favors a large distance (and older) remnant. If the expansion over the last four years < 6.0", then the remnant is too old (> 1200 yr) to have a significant amount of titanium-44 left. If the expansion is much larger, then the results indicate the remnant is young enough to contain a substantial amount of titanium-44.

R.A. Dec. Target Name Det. Grating Exp.Time
8:49:09.40 -45:37:42.40 G266.2-1.2 NORTH ACIS-I NONE 40

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500752

Title: X-ray Observations of 11 Millisecond Pulsars in M28

PI Name: Jonathan Grindlay

Type: GO

We propose a deep X-ray survey of the globular cluster M28 which will yield a wealth of important and unique science, ranging from the first direct measurement of the magnetic field of a millisecond pulsar and constraints on the neutron star equation of state to likely X-ray/optical (HST) detection of a re-exchanged binary MSP. The proposed joint HST WFPC2 observation will tie the X-ray, optical, and radio data to a common astrometric frame allowing an unambiguous identification of numerous cataclysmic variables and active binaries in M28 as well as making possible the first direct optical detection of a millisecond pulsar.

R.A. Dec. Target Name Det. Grating Exp.Time
18:24:32.90 -24:52:11.40 NGC 6626 ACIS-S NONE 40
18:24:32.90 -24:52:11.40 NGC 6626 ACIS-S NONE 160

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500789

Title: Constraining GRB physics through their afterglow light curves

PI Name: Evert Rol

Type: TOO

Our current understanding of gamma-ray burst afterglow light curves has become increasingly confused, and the validity of the standard synchrotron fireball model for GRBs is nowadays increasingly questioned. In particular, achromatic breaks due to the lateral expansion of the GRB jet are not substantiated by Swift X-ray observations. It is only through this that the true energies of GRBs are constrained, and that questions such as the true rate of GRBs and the determination of cosmological parameters can be answered. We propose to use CXO to construct the late time X-ray light curves for several Swift bursts. These observations will search for evidence of achromatic jet breaks, providing the necessary insight into the GRB evolution, and the energy and activity of the central engine.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 GRB ACIS-S NONE 3
0:00:00.00 0:00:00.00 GRB ACIS-S NONE 6
0:00:00.00 0:00:00.00 GRB ACIS-S NONE 12
0:00:00.00 0:00:00.00 GRB ACIS-S NONE 24

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500791

Title: A Chandra observation of the proper motion of RCW 89

PI Name: Yoichi Yatsu

Type: GO

In cycle 6 we observed RCW 89 to resolve fine structure in X-ray band. From the observation we discovered that the X-ray emitting region in RCW 89 are moving away from the pulsar at a velocity of 5000 km/s. The motion of X-ray emitting region may represent the propagation of the shock front driven by the supernova blastwave or the relativistic pulsar jet. And these results can be an evidence for that PSR B 1509-58 and MSH 15-52 (RCW 89) are physically linked. However the calculated velocity has large uncertainty caused by the low quality of the image taken by the first observation of PSR B1509-58 on 2000, in which RCW 89 was on the edge of ACIS-I with worse photon statistics. We therefor propose another 60 ks Chandra observation of RCW 89.

R.A. Dec. Target Name Det. Grating Exp.Time
15:13:34.20 -59:01:58.00 RCW 89 ACIS-S NONE 60

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500804

Title: HESS J1731-347: The first TeV pulsar wind nebula from a supersonic pulsar with an X-ray bow shock geometry?

PI Name: Gerd Puehlhofer

Type: GO

We propose to observe the X-ray counterpart to the TeV source HESS J1731-347 in imaging mode with Chandra. Based on our Suzaku observations of the TeV source, we believe that the object can be identified as a pulsar wind nebula driven by a pulsar with supersonic motion. Arcsecond X-ray imaging should reveal the geometry of this object, similar to what is observed with Chandra for the few other examples of this small but interesting class of X-ray pulsar wind nebulae.

R.A. Dec. Target Name Det. Grating Exp.Time
17:32:03.00 -34:45:25.50 HESS J1731-347-XC ACIS-I NONE 30

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500845

Title: Constraining the Continued Rise of SN1996cr

PI Name: Franz Bauer

Type: GO

Recently confirmed SN 1996cr ranks among the closest and X-ray brightest supernovae (SNe) detected on the sky. Past X-ray observations of 1996cr have shown it to have a unique spectral evolution compared to typical type-II SNe, wherein the X-ray flux is still increasing 10 years post-explosion (akin to 1987A). This rising emission is attributed to the ejecta propagating through increasingly dense circumstellar material (e.g., wind) leftover from the past evolution of the supergiant progenitor. We propose an ACIS-S observation of 1996cr to monitor the evolving X-ray spectrum of this unique object and trace back its evolutionary history.

R.A. Dec. Target Name Det. Grating Exp.Time
14:13:10.00 -65:20:44.50 SN1996cr ACIS-S NONE 55

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500854

Title: Study of a New Class of Isolated Neutron Star -- 1RXS J141256.0+792204

PI Name: DEREK FOX

Type: GO

We have discovered a new candidate isolated neutron star (INS), the first F_X/F_opt>5000 object to be discovered in seven years, and quite probably the first NS of any sort to be identified in the Galactic halo. Treating the source as analogous to the 7 known INSs implies that, at a height of 4.8 kpc above the Galactic plane, it must have either a very high spatial velocity (> 4800 km/s) or a cooling time much longer than NS cooling theories predict (> 24 Myr). Alternative interpretations of the source as a magnetar or `compact central object' suffer from their own difficulties. We therefore propose to make the first detailed X-ray characterization of this INS, with Chandra observations providing a high S/N CCD-spectrum, investigating long-term variability, and searching for pulsations.

R.A. Dec. Target Name Det. Grating Exp.Time
14:12:56.50 79:22:04.40 1RXS J141256.0+792204 ACIS-S NONE 30

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500890

Title: AO9 Chandra Monitoring of SNR 1987A

PI Name: David Burrows

Type: GO

SNR1987A provides a unique opportunity to study the development of a young supernova remnant at high resolution. We have monitored SN/SNR1987A at roughly six month intervals since October 1999. The remnant is expanding and is increasing exponentially in X-ray brightness. We propose to continue this monitoring program with two additional observations in AO9, spaced six months apart. We will perform spatially-resolved spectroscopy in addition to monitoring the expansion and the development of new X-ray hot spots. We do not consider this proposal to conflict with the proposed HRC observations, since our science requires the energy resolution of the ACIS.

R.A. Dec. Target Name Det. Grating Exp.Time
5:35:28.00 -69:16:11.10 SNR 1987A ACIS-S LETG 43
5:35:28.00 -69:16:11.10 SNR 1987A ACIS-S NONE 29
5:35:28.00 -69:16:11.10 SNR 1987A ACIS-S NONE 33

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500896

Title: TINY HICCUPS TO TITANIC EXPLOSIONS: Tackling Transients in Anomalous X-ray Pulsars

PI Name: Victoria Kaspi

Type: TOO

Recently discovered transient events in Anomalous X-ray Pulsars (AXPs) may be a Rosetta Stone for understanding the persistent emission from magnetars. They also may hold the key to quantifying the number of magnetars in the Galaxy. Here we request Chandra TOO time to observe any AXP following a rare transient event, including a major outburst or a long-duration flare. Specifically, the requested observations will determine the pulsed fraction and spectral evolution of a transient AXP event as the source relaxes back to quiescence, in order to quantitatively test the "twisted magnetosphere" model for magnetars, and establish the basic phenomenology of transient AXP events.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 New AXP ACIS-S NONE 15
0:00:00.00 0:00:00.00 New AXP ACIS-S NONE 15
0:00:00.00 0:00:00.00 New AXP ACIS-S NONE 18
0:00:00.00 0:00:00.00 New AXP ACIS-S NONE 18
0:00:00.00 0:00:00.00 New AXP ACIS-S NONE 22
0:00:00.00 0:00:00.00 New AXP ACIS-S NONE 22
0:00:00.00 0:00:00.00 New AXP ACIS-S NONE 25
0:00:00.00 0:00:00.00 New AXP ACIS-S NONE 25
1:00:43.10 -72:11:33.80 CXOU J0110043.1-721134 ACIS-S NONE 15
1:00:43.10 -72:11:33.80 CXOU J0110043.1-721134 ACIS-S NONE 15
1:00:43.10 -72:11:33.80 CXOU J0110043.1-721134 ACIS-S NONE 15
1:00:43.10 -72:11:33.80 CXOU J0110043.1-721134 ACIS-S NONE 18
1:00:43.10 -72:11:33.80 CXOU J0110043.1-721134 ACIS-S NONE 18
1:00:43.10 -72:11:33.80 CXOU J0110043.1-721134 ACIS-S NONE 18
1:00:43.10 -72:11:33.80 CXOU J0110043.1-721134 ACIS-S NONE 22
1:00:43.10 -72:11:33.80 CXOU J0110043.1-721134 ACIS-S NONE 22
1:00:43.10 -72:11:33.80 CXOU J0110043.1-721134 ACIS-S NONE 22
1:00:43.10 -72:11:33.80 CXOU J0110043.1-721134 ACIS-S NONE 25
1:00:43.10 -72:11:33.80 CXOU J0110043.1-721134 ACIS-S NONE 25
1:00:43.10 -72:11:33.80 CXOU J0110043.1-721134 ACIS-S NONE 25
1:46:22.30 61:45:07.00 4U 0142+61 ACIS-S NONE 15
1:46:22.30 61:45:07.00 4U 0142+61 ACIS-S NONE 15
1:46:22.30 61:45:07.00 4U 0142+61 ACIS-S NONE 15
1:46:22.30 61:45:07.00 4U 0142+61 ACIS-S NONE 18
1:46:22.30 61:45:07.00 4U 0142+61 ACIS-S NONE 18
1:46:22.30 61:45:07.00 4U 0142+61 ACIS-S NONE 18
1:46:22.30 61:45:07.00 4U 0142+61 ACIS-S NONE 22
1:46:22.30 61:45:07.00 4U 0142+61 ACIS-S NONE 22
1:46:22.30 61:45:07.00 4U 0142+61 ACIS-S NONE 22
1:46:22.30 61:45:07.00 4U 0142+61 ACIS-S NONE 25
1:46:22.30 61:45:07.00 4U 0142+61 ACIS-S NONE 25
1:46:22.30 61:45:07.00 4U 0142+61 ACIS-S NONE 25
10:50:08.90 -59:53:20.40 1E 1048.1-5937 ACIS-S NONE 15
10:50:08.90 -59:53:20.40 1E 1048.1-5937 ACIS-S NONE 15
10:50:08.90 -59:53:20.40 1E 1048.1-5937 ACIS-S NONE 15
10:50:08.90 -59:53:20.40 1E 1048.1-5937 ACIS-S NONE 18
10:50:08.90 -59:53:20.40 1E 1048.1-5937 ACIS-S NONE 18
10:50:08.90 -59:53:20.40 1E 1048.1-5937 ACIS-S NONE 18
10:50:08.90 -59:53:20.40 1E 1048.1-5937 ACIS-S NONE 22
10:50:08.90 -59:53:20.40 1E 1048.1-5937 ACIS-S NONE 22
10:50:08.90 -59:53:20.40 1E 1048.1-5937 ACIS-S NONE 22
10:50:08.90 -59:53:20.40 1E 1048.1-5937 ACIS-S NONE 25
10:50:08.90 -59:53:20.40 1E 1048.1-5937 ACIS-S NONE 25
10:50:08.90 -59:53:20.40 1E 1048.1-5937 ACIS-S NONE 25
16:47:10.20 -45:52:17.00 CXOU J164710.2-455216 ACIS-S NONE 15
16:47:10.20 -45:52:17.00 CXOU J164710.2-455216 ACIS-S NONE 15
16:47:10.20 -45:52:17.00 CXOU J164710.2-455216 ACIS-S NONE 15
16:47:10.20 -45:52:17.00 CXOU J164710.2-455216 ACIS-S NONE 18
16:47:10.20 -45:52:17.00 CXOU J164710.2-455216 ACIS-S NONE 18
16:47:10.20 -45:52:17.00 CXOU J164710.2-455216 ACIS-S NONE 18
16:47:10.20 -45:52:17.00 CXOU J164710.2-455216 ACIS-S NONE 22
16:47:10.20 -45:52:17.00 CXOU J164710.2-455216 ACIS-S NONE 22
16:47:10.20 -45:52:17.00 CXOU J164710.2-455216 ACIS-S NONE 22
16:47:10.20 -45:52:17.00 CXOU J164710.2-455216 ACIS-S NONE 25
16:47:10.20 -45:52:17.00 CXOU J164710.2-455216 ACIS-S NONE 25
16:47:10.20 -45:52:17.00 CXOU J164710.2-455216 ACIS-S NONE 25
17:08:47.20 -40:08:50.70 RXS 1708-4009 ACIS-S NONE 15
17:08:47.20 -40:08:50.70 RXS 1708-4009 ACIS-S NONE 15
17:08:47.20 -40:08:50.70 RXS 1708-4009 ACIS-S NONE 15
17:08:47.20 -40:08:50.70 RXS 1708-4009 ACIS-S NONE 18
17:08:47.20 -40:08:50.70 RXS 1708-4009 ACIS-S NONE 18
17:08:47.20 -40:08:50.70 RXS 1708-4009 ACIS-S NONE 18
17:08:47.20 -40:08:50.70 RXS 1708-4009 ACIS-S NONE 22
17:08:47.20 -40:08:50.70 RXS 1708-4009 ACIS-S NONE 22
17:08:47.20 -40:08:50.70 RXS 1708-4009 ACIS-S NONE 22
17:08:47.20 -40:08:50.70 RXS 1708-4009 ACIS-S NONE 25
17:08:47.20 -40:08:50.70 RXS 1708-4009 ACIS-S NONE 25
17:08:47.20 -40:08:50.70 RXS 1708-4009 ACIS-S NONE 25
18:09:51.10 -19:43:51.70 XTE J1810-197 ACIS-S NONE 15
18:09:51.10 -19:43:51.70 XTE J1810-197 ACIS-S NONE 15
18:09:51.10 -19:43:51.70 XTE J1810-197 ACIS-S NONE 15
18:09:51.10 -19:43:51.70 XTE J1810-197 ACIS-S NONE 18
18:09:51.10 -19:43:51.70 XTE J1810-197 ACIS-S NONE 18
18:09:51.10 -19:43:51.70 XTE J1810-197 ACIS-S NONE 18
18:09:51.10 -19:43:51.70 XTE J1810-197 ACIS-S NONE 22
18:09:51.10 -19:43:51.70 XTE J1810-197 ACIS-S NONE 22
18:09:51.10 -19:43:51.70 XTE J1810-197 ACIS-S NONE 22
18:09:51.10 -19:43:51.70 XTE J1810-197 ACIS-S NONE 25
18:09:51.10 -19:43:51.70 XTE J1810-197 ACIS-S NONE 25
18:09:51.10 -19:43:51.70 XTE J1810-197 ACIS-S NONE 25
18:41:19.20 -4:56:12.50 1E 1841-045 ACIS-S NONE 15
18:41:19.20 -4:56:12.50 1E 1841-045 ACIS-S NONE 15
18:41:19.20 -4:56:12.50 1E 1841-045 ACIS-S NONE 15
18:41:19.20 -4:56:12.50 1E 1841-045 ACIS-S NONE 18
18:41:19.20 -4:56:12.50 1E 1841-045 ACIS-S NONE 18
18:41:19.20 -4:56:12.50 1E 1841-045 ACIS-S NONE 18
18:41:19.20 -4:56:12.50 1E 1841-045 ACIS-S NONE 22
18:41:19.20 -4:56:12.50 1E 1841-045 ACIS-S NONE 22
18:41:19.20 -4:56:12.50 1E 1841-045 ACIS-S NONE 22
18:41:19.20 -4:56:12.50 1E 1841-045 ACIS-S NONE 25
18:41:19.20 -4:56:12.50 1E 1841-045 ACIS-S NONE 25
18:41:19.20 -4:56:12.50 1E 1841-045 ACIS-S NONE 25
18:44:53.00 -2:56:40.00 AX J1845-0258 ACIS-S NONE 15
18:44:53.00 -2:56:40.00 AX J1845-0258 ACIS-S NONE 15
18:44:53.00 -2:56:40.00 AX J1845-0258 ACIS-S NONE 15
18:44:53.00 -2:56:40.00 AX J1845-0258 ACIS-S NONE 18
18:44:53.00 -2:56:40.00 AX J1845-0258 ACIS-S NONE 18
18:44:53.00 -2:56:40.00 AX J1845-0258 ACIS-S NONE 18
18:44:53.00 -2:56:40.00 AX J1845-0258 ACIS-S NONE 22
18:44:53.00 -2:56:40.00 AX J1845-0258 ACIS-S NONE 22
18:44:53.00 -2:56:40.00 AX J1845-0258 ACIS-S NONE 22
18:44:53.00 -2:56:40.00 AX J1845-0258 ACIS-S NONE 25
18:44:53.00 -2:56:40.00 AX J1845-0258 ACIS-S NONE 25
18:44:53.00 -2:56:40.00 AX J1845-0258 ACIS-S NONE 25
23:01:07.90 58:52:46.00 1E 2259+586 ACIS-S NONE 15
23:01:07.90 58:52:46.00 1E 2259+586 ACIS-S NONE 15
23:01:07.90 58:52:46.00 1E 2259+586 ACIS-S NONE 15
23:01:07.90 58:52:46.00 1E 2259+586 ACIS-S NONE 18
23:01:07.90 58:52:46.00 1E 2259+586 ACIS-S NONE 18
23:01:07.90 58:52:46.00 1E 2259+586 ACIS-S NONE 18
23:01:07.90 58:52:46.00 1E 2259+586 ACIS-S NONE 22
23:01:07.90 58:52:46.00 1E 2259+586 ACIS-S NONE 22
23:01:07.90 58:52:46.00 1E 2259+586 ACIS-S NONE 22
23:01:07.90 58:52:46.00 1E 2259+586 ACIS-S NONE 25
23:01:07.90 58:52:46.00 1E 2259+586 ACIS-S NONE 25
23:01:07.90 58:52:46.00 1E 2259+586 ACIS-S NONE 25

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500898

Title: PSRJ1832+0029: a unique probe of pulsar emission physics

PI Name: Duncan Lorimer

Type: GO

We have discovered very unusual behavior in PSR J1832+0029, a 533-ms radio pulsar which switches between on and off states on timescales of several hundred days. Remarkably, the pulsar's spin-down rate almost doubles when the radio emission is on. This is even more dramatic than observed for PSR B1931+24 for which no satisfactory theory presently exists. Unlike PSR B1931+24, J1832+0029 is nearby (1.3 kpc) and an excellent target for X-ray detection. Here we request a 20 ks ACIS observation to study the X-ray emission of PSR J1832+0029 in its on or off state. With a second exposure requested by a companion TOO proposal, the observations would distinguish between radio emission quenching mechanisms that are either intrinsic to the pulsar or caused by accretion from an orbiting companion.

R.A. Dec. Target Name Det. Grating Exp.Time
18:32:50.70 0:29:28.90 PSR J1832+0029 ACIS-S NONE 20

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 09500899

Title: PSRJ1832+0029: a unique target for pulsar emission physics

PI Name: Duncan Lorimer

Type: TOO

We have discovered very unusual behavior in PSR J1832+0029, a 533-ms radio pulsar which switches between on and off states on timescales of several hundred days. Remarkably, the pulsar's spin-down rate almost doubles when the radio emission is on. This is even more dramatic than observed for PSR B1931+24 for which no satisfactory theory presently exists. Unlike PSR B1931+24, J1832+0029 is nearby (1.3 kpc) and an excellent target for X-ray detection. Here we request a 20 ks ACIS TOO to study the X-ray emission of PSR J1832+0029 in its on or off state, triggered by radio monitoring following a companion GO proposal. The observations would distinguish between radio emission quenching mechanisms that are either intrinsic to the pulsar or caused by accretion from an orbiting companion.

R.A. Dec. Target Name Det. Grating Exp.Time
18:32:50.70 0:29:28.90 PSR J1832+0029 ACIS-S NONE 20

Subject Category: NORMAL GALAXIES

Proposal Number: 09610049

Title: Ram Pressure Stripping in the Virgo Cluster - M86 Followup

PI Name: Stephen Murray

Type: GTO

We propose Chandra ACIS-I observations of the "tail" and "head" of M86, a galaxy that is traversing the Virgo cluster with supersonic velocity. The galaxy shows a long tail for which we wish to improve the spectral data by increasing the observing time. In addition, we are searching for a leading shock, either through a surface brightness discontinuity or shocked thermal component in the spectrum. We propose a second pointing at the leading shock region (toward M87) where the ROSAT observation suggests the presence of a sharp feature.

R.A. Dec. Target Name Det. Grating Exp.Time
12:25:11.00 13:16:56.70 M86 tail ACIS-I NONE 30
12:26:49.10 12:56:02.20 M86 head ACIS-I NONE 20

Subject Category: NORMAL GALAXIES

Proposal Number: 09610400

Title: DUST DISKS AND THE EVOLUTION OF S0 GALAXIES

PI Name: Raymond White

Type: GO

We propose Chandra observations of three edge-on S0 galaxies with dusty disks to determine whether their survival against sputtering is due either to their having insubstantial hot atmospheres or ongoing star formation. Since dust is readily destroyed by sputtering in hot atmospheres, one expects only small amounts due to stellar mass loss over a dust sputtering lifetime (~10^7 yr). The more substantial amounts of dust seen in these S0s indicate that dust is replenished by ongoing star formation (either residual secular star formation or that associated with a recent merger) and/or resides in a less hostile sputtering environment: an insubstantial atmosphere characterized by a low X-ray (gas) to optical (stellar) luminosity ratio. Chandra observations can constrain either case.

R.A. Dec. Target Name Det. Grating Exp.Time
11:54:01.50 -19:34:08.00 NGC 3957 ACIS-S NONE 40
12:49:38.90 15:09:56.00 NGC 4710 ACIS-S NONE 30
14:00:42.00 55:09:52.00 NGC 5422 ACIS-S NONE 40

Subject Category: NORMAL GALAXIES

Proposal Number: 09610464

Title: Dust-to-gas Ratio of High Redshift Galaxies

PI Name: Xinyu Dai

Type: GO

We propose to observe the differential X-ray absorption in three gravitational lenses with significant optical extinctions. By combining the X-ray and optical differential absorption measurements, we will accurately measure the dust-to-gas ratio of the three cosmologically distant galaxies. Combining these new measurements with earlier measurements, we will test whether the dust-to-gas ratio evolves with redshift as predicted by simulations of dust formation and evolution. Such information is to understanding galaxy and star formation and evolution in the presence of an absorbing ISM.

R.A. Dec. Target Name Det. Grating Exp.Time
0:50:27.80 -17:40:08.80 HE0047-1756 ACIS-S NONE 40
2:46:34.10 -8:25:36.20 SDSS0246-0825 ACIS-S NONE 50
13:55:43.40 -22:57:22.90 Q1355-2257 ACIS-S NONE 30

Subject Category: NORMAL GALAXIES

Proposal Number: 09610492

Title: Reading the historical chronicle of activity of the SMBH in NGC5813 using cavities and shocks in the surrounding hot gas

PI Name: William Forman

Type: GO

We propose a deep observation of NGC5813 whose X-ray image shows three pairs of cavities and two shock rings. Combining this observation with the existing data, we can measure the gas temperature and density jumps at the shocks to derive the shock Mach numbers and outburst energies, determine the outburst history by measuring the spatial separation of cavities and shocks, and measure the energy output history of the SMBH by combining the inventory of bubbles and shocks with their ages and models of buoyancy and shock propagation. With its multiple cavities and shocks, NGC5813's X-ray atmosphere provides a rare opportunity to chronicle the activity of its supermassive black hole.

R.A. Dec. Target Name Det. Grating Exp.Time
15:01:11.20 1:42:07.00 NGC5813 ACIS-S NONE 100

Subject Category: NORMAL GALAXIES

Proposal Number: 09610499

Title: ESO 137-001 in A3627: ISM Stripping and Intracluster X-ray Binaries

PI Name: Ming Sun

Type: GO

Stripping the ISM from disk galaxies in clusters has important effects on both galaxies and the ICM, e.g., galaxy transformation, changes in star formation rates and metal enrichment of the ICM. The gaseous stripped tail also permits tests for important micro-physics. However, X-ray tails of late-type cluster galaxies are rare and we have never had a chance to study one in detail. We propose a 150 ks observation of a spectacular X-ray tail of a small starburst galaxy in the rich cluster A3627, for which a 40 kpc Halpha tail and 28 intergalactic HII regions have recently been found. The deep Chandra exposure is essential to: 1) reveal intracluster ULXs and study the XRB population in the tail, 2) understand stripping of the ISM in the strong ICM wind, and 3) constrain the ICM viscosity.

R.A. Dec. Target Name Det. Grating Exp.Time
16:13:22.60 -60:45:24.00 ESO 137-001 ACIS-S NONE 150

Subject Category: NORMAL GALAXIES

Proposal Number: 09610593

Title: The X-ray emission of the Lyman-alpha emitting galaxies Haro 2 and ESO338-04

PI Name: Miguel Mas-Hesse

Type: GO

We propose to obtain X ray images and spectra with Chandra ACIS-S of the Lyman alpha emitting starburst galaxies ESO 338-04 and Haro 2, aiming to analyze the proposed correlation between X ray luminosity and Lyalpha emission intensity in compact starbursts. This work will be performed within our current project to characterize in detail the properties of Lyman alpha emitting starburst galaxies in the Local Universe, as a first step to properly understand the Lyman alpha emission observed from high-redshift galaxies.

R.A. Dec. Target Name Det. Grating Exp.Time
10:32:31.90 54:24:04.00 Haro 2 ACIS-S NONE 20

Subject Category: NORMAL GALAXIES

Proposal Number: 09620024

Title: Black Hole X-ray Novae in M31

PI Name: Stephen Murray

Type: GTO

During A01-7 we found >16 Black Hole X-ray Novae (BHXN) in M31 using Chandra, and with HST followup have estimated orbital periods for 6 of these. Observations are underway with HST to attempt to estimate additional periods. We propose to continue this program,mboth concentrating our scarce HST resources on a single transient which exceeds the NS Eddington limit. Only uninterrupted monitoring can yield the duty cycles and long-term lightcurves of BHXN (and other variables) in M31. Our GO+GTO programs have accumulated 590ks (ACIS+HRC) near the M31 bulge, and total Chandra exposure on M31 is now 940ks. By continuing our monitoring program through AO10 we will reach ~750ks on the bulge and >1Msec total Chandra M31 exposure.

R.A. Dec. Target Name Det. Grating Exp.Time
0:42:44.40 41:16:08.30 M31 ACIS-I NONE 5
0:42:44.40 41:16:08.30 M31 ACIS-I NONE 5
0:42:44.40 41:16:08.30 M31 ACIS-I NONE 5
0:42:44.40 41:16:08.30 M31 ACIS-I NONE 5
0:42:44.40 41:16:08.30 M31 ACIS-I NONE 5

Subject Category: NORMAL GALAXIES

Proposal Number: 09620084

Title: X-ray Localization of the Globular Cluster G1 in M31

PI Name: Albert Kong

Type: GO

Localization of the X-ray emission of the globular cluster G1 in M31 will enable us to determine the origin of the X-ray radiation. From previous X-ray observations, the emission could be either due to accretion of cluster gas by the central intermediate-mass black hole, or a typical luminous low-mass X-ray binary. However, all previous X-ray observations do not allow an accurate relative astrometry. Using Chandra, we can achieve ~0.1" relative astrometry between Chandra and optical images by utilizing multiple X-ray sources with optical counterparts. The accuracy of the astrometry will allow us to determine the nature of the X-ray emission and it may provide an independent evidence for intermediate-mass black hole in G1.

R.A. Dec. Target Name Det. Grating Exp.Time
0:32:46.50 39:34:39.70 G1 ACIS-S NONE 35

Subject Category: NORMAL GALAXIES

Proposal Number: 09620092

Title: Are the X-Ray Binaries in S0 Galaxies Different From Those in Ellipticals?

PI Name: Craig Sarazin

Type: GO

Chandra images of X-ray faint ellipticals (Es) resolved them into low mass X-ray binaries (LMXBs) plus some emission from ISM. We propose Chandra observations of three X-ray faint S0 galaxies for comparison to ellipticals. We will derive the luminosity functions (LF) of LMXBs and compare to Es; LFs provide direct evidence of the history of massive star formation and a measure of the relative numbers of NS and BH binaries. We will search for variability, limiting the duty cycle of LMXBs. We will hunt for luminous X-ray flares which may be due to microblazars. We expect ~80 LMXBs in globular clusters; we will compare these with similar sources in Es, which can constrain the formation mechanism of field LMXBs. The amount, distribution, and spectrum of any ISM gas emission will be derived.

R.A. Dec. Target Name Det. Grating Exp.Time
3:36:27.30 -34:58:33.70 NGC1380 ACIS-S NONE 42
9:11:37.50 60:02:15.00 NGC2768 ACIS-S NONE 68
12:30:02.20 13:38:11.20 NGC4477 ACIS-S NONE 38

Subject Category: NORMAL GALAXIES

Proposal Number: 09620136

Title: Continued M31 Monitoring for Black Hole X-ray Nova

PI Name: MICHAEL GARCIA

Type: GO

During A01-7 we found >16 Black Hole X-ray Novae (BHXN) in M31 using Chandra, and with HST followup have estimated orbital periods for 6 of these. Observations are underway with HST to attempt to estimate additional periods. We propose to continue this program, concentrating our scarce HST resources on a single transient which exceeds the NS Eddington limit. Only uninterrupted monitoring can yield the duty cycles and long-term lightcurves of BHXN (and other variables) in M31. Our GO+GTO programs have accumulated 300ks (ACIS) near the M31 bulge, and total ACIS exposure on M31 is now 620ks. Our monitoring program alone can amass 500ks on the bulge if continued through AO12, and combined with other programs will reach >1Msec ACIS exposure on the bulge.

R.A. Dec. Target Name Det. Grating Exp.Time
0:42:44.40 41:16:08.30 M31 ACIS-I NONE 5

Subject Category: NORMAL GALAXIES

Proposal Number: 09620187

Title: The Remarkably Steady Nature of Luminous LMXBs in Elliptical Galaxies

PI Name: Jimmy Irwin

Type: GO

Multi-epoch Chandra observations of two elliptical galaxies have shown that the most luminous LMXBs are remarkably steady, with none of the 33 >8e38 ergs/s sources in both galaxies having turned off in a 3-5 yr timespan. As a group, the minimum outburst duration must be at least 50 yr such that all of the sources remained on during this time. The two most likely explanations for this behavior is they are transient long-period, wide-orbit red giant black hole LMXBs like GRS1915+105, or persistent ultracompact black hole LMXBs. We propose to reobserve NGC1399 to establish an 8-yr baseline for monitoring its luminous sources. Along with archival data of M87, this will place stringent limits on their outburst duration to distinguish between the two competing scenarios.

R.A. Dec. Target Name Det. Grating Exp.Time
3:38:29.00 -35:27:01.40 NGC1399 ACIS-S NONE 65

Subject Category: NORMAL GALAXIES

Proposal Number: 09620205

Title: Monitoring the brightest ULXs in the Cartwheel

PI Name: Anna Wolter

Type: GO

A Chandra observation detected 16 ULXs, in the starforming southern ring of the Cartwheel, one of the most outstanding and rare examples of intense star formation triggered by the propagation of density waves.Subsequent XMM-Newton data allowed us to witness a flux variation of the brightest of these (source N.10), unraveling its compact nature. We propose a deeper look to explore further the variability properties of N.10, and that of at least 9 of the brightest ULXs, in order to asses their link with the HMXB population. A total of 200 ksec, split in 2 segments, will allow us to obtain crucial details (variability pattern, and possibly spectral shape variation) to assess the physical nature of the sources. The observation will also probe into the physics of the diffuse gas.

R.A. Dec. Target Name Det. Grating Exp.Time
0:37:40.00 -33:42:58.00 Cartwheel ACIS-S NONE 100

Subject Category: NORMAL GALAXIES

Proposal Number: 09620250

Title: Untangling Sombrero's X-ray Emission from Coronally Active Binaries, Cataclysmic Variables, LMXBs, and Hot Gas

PI Name: Christine Jones

Type: GO

We propose a deep (180 ks) ACIS-I observation of the Sombrero galaxy. At a distance of 9 Mpc, this isolated, large bulge Sa galaxy, with a highly inclined disk and surprisingly little X-ray gas, offers a unique opportunity to study the diffuse emission and the point source population. Our primary goals are 1) to examine the contribution to the ISM of mass lost from stars and the energy input to drive a wind from type Ia SN and the central AGN and 2) to take a census of the bulge X-ray populations, including LMXBs, supersoft sources, and the unresolved emission from coronally active binaries (ABs) and CVs and measure their contribution to the diffuse X-ray emission. With ~160 expected globular cluster sources, we will derive the cluster luminosity function.

R.A. Dec. Target Name Det. Grating Exp.Time
12:39:59.40 -11:36:53.00 Sombero ACIS-I NONE 90
12:39:59.40 -11:36:03.00 Sombero ACIS-I NONE 90

Subject Category: NORMAL GALAXIES

Proposal Number: 09620513

Title: Galaxies across the Octaves: A Chandra Legacy Survey of SINGS Galaxies

PI Name: Leigh Jenkins

Type: LP

We propose to complete a rich, X-ray unbiased, multiwavelength Legacy dataset for a sample of 40 nearby galaxies. These galaxies are a distance limited (d < 10 Mpc) sample from the Spitzer Infrared Nearby Galaxy Survey (SINGS) Legacy program. The sample is now 45% complete. Our observations will detect X-ray binaries as faint as 3e36-1e37 erg/s, allowing us to constrain the X-ray binary/SFR correlation over a large range of galaxy properties and build X-ray binary Luminosity Functions for galaxies across a range of star formation histories. We will produce Legacy datasets and source catalogs for the community, and run theoretical binary population synthesis models in support of this effort.

R.A. Dec. Target Name Det. Grating Exp.Time
0:09:56.50 -24:57:48.00 NGC 24 ACIS-S NONE 43.3
2:14:03.70 27:52:36.70 NGC 855 ACIS-S NONE 59.3
8:23:56.00 71:01:45.50 M81 DwA ACIS-S NONE 26.3
8:34:07.30 66:10:54.60 DDO 53 ACIS-S NONE 26.3
9:26:11.50 -76:37:35.00 NGC 2915 ACIS-S NONE 15.6
9:40:32.30 71:10:56.00 Holmberg I ACIS-S NONE 26.3
9:47:15.50 67:55:03.10 NGC 2976 ACIS-S NONE 10
9:57:32.00 69:02:45.00 Holmberg IX ACIS-S NONE 26.3
10:05:30.60 70:21:52.00 M81 DwB ACIS-S NONE 26.3
10:19:54.80 45:33:00.50 NGC 3198 ACIS-S NONE 61.8
10:28:21.50 68:24:41.00 IC 2574 ACIS-I NONE 11.2
11:05:48.90 -0:02:05.90 NGC 3521 ACIS-I NONE 74.1
11:20:15.10 12:59:21.60 NGC 3627 ACIS-S NONE 51
12:16:41.80 69:28:09.70 NGC 4236 ACIS-I NONE 11.2
12:41:52.80 41:16:25.90 NGC 4625 ACIS-S NONE 58.1
12:50:52.60 41:07:09.30 NGC 4736 ACIS-I NONE 25.7
12:54:05.50 27:08:55.30 DDO 154 ACIS-S NONE 62.6
12:56:43.90 21:41:00.10 NGC 4826 ACIS-S NONE 28.7
13:06:24.90 67:42:25.00 DDO 165 ACIS-S NONE 26.3
14:05:01.50 53:39:44.60 NGC 5474 ACIS-S NONE 30.7
18:28:38.20 -66:58:54.00 IC 4710 ACIS-S NONE 46.5

Subject Category: NORMAL GALAXIES

Proposal Number: 09620553

Title: Understanding the Low-Mass X-ray Binaries in the Sculptor Dwarf Spheroidal Galaxy

PI Name: Stephen Zepf

Type: GO

We propose to obtain two 50 ks observations of the Sculptor Dwarf Spheroidal Galaxy. In conjunction with our series of observations in 2004 totalling 126 ks, this will allow us to study any changes over a four year baseline in the low-mass X-ray binary (LMXB) population we discovered in the initial dataset (Maccarone et al. 2005) The proposed observations will leverage the discovery of LMXBs in Sculptor and use the time baseline to address key questions about how LMXBs in the field form and evolve, and the implications of their retention in the low mass dwarf galaxy. In addition, we propose to obtain optical spectroscopy to understand why many of the optical counterparts have colors and magnitudes like those of horizontal branch stars.

R.A. Dec. Target Name Det. Grating Exp.Time
1:00:09.30 -33:42:33.00 Sculptor Dwarf Galaxy ACIS-S NONE 50

Subject Category: NORMAL GALAXIES

Proposal Number: 09620585

Title: First X-ray Observation of the Unique Starburst Galaxy NGC 7673

PI Name: Michael Loewenstein

Type: GO

NGC 7673 is a unique local starburst galaxy with a much higher star formation rate than either M82 or the Antennae Galaxies, and yet is virtually unobserved in X-rays. 0.1 count/sec is expected in our proposed 60 ksec Chandra observation -- mostly in the form of soft diffuse thermal emission, and a population of High Mass X-ray Binaries that will be mostly resolved into 40 ultraluminous sources. Analysis of these components contribute to our understanding of the X-ray properties of starbursts and serves as a useful analog for the compact star forming galaxies and protogalaxies that dominate the overall star formation in the universe. As such, NGC 7673 is a keystone for locally calibrating the relation between star formation rate and hard X-ray luminosity.

R.A. Dec. Target Name Det. Grating Exp.Time
23:27:41.00 23:35:20.00 NGC 7673 ACIS-S NONE 60

Subject Category: NORMAL GALAXIES

Proposal Number: 09620641

Title: NGC 3599: The nearest and most recently discovered tidal disruption event

PI Name: Pilar Esquej

Type: GO

NGC 3599 is an optically non-active galaxy that has been discovered to meet all known criteria for objects within the tidal disruption scenario. At 11.9 Mpc it is the closest known candidate and, as such, may be an important target for future high spatial-resolution observations in other wavebands. Here we propose to observe NGC 3599 with Chandra ACIS-S for 20 ks taking advantage of its excellent spatial resolution to confirm that the X-ray flare originates in the galactic nucleus and achieve a high significance point on the light curve to test whether the decay in emission still follows the theoretical t^-5/3 law.

R.A. Dec. Target Name Det. Grating Exp.Time
11:15:26.90 18:06:37.00 NGC 3599 ACIS-S NONE 20

Subject Category: NORMAL GALAXIES

Proposal Number: 09620645

Title: Super starbursts

PI Name: Jonathan Gelbord

Type: GO

It is commonly assumed that all galaxies with X-ray luminosities above $10^{42}$erg/s harbour AGN, regardless of their optical spectral classification, due to the absence of starburst galaxies in the local universe above such extreme $L_x$. By cross-correlating the 2XMMp and SDSS DR5 catalogues we have discovered several galaxies with $L_x>10^{42}$erg/s and no optical AGN evidence. We propose to use the superb spatial resolution of Chandra to observe three of these galaxies, to determine whether the XMM-detected emission is from a single, compact (few kpc) super starburst or a blend of components (less extreme starbursts, ULXs, superwinds) on few-arcsec scales. We will also use imaging spectroscopy to test whether these is any AGN contribution that is undetected at optical wavelengths.

R.A. Dec. Target Name Det. Grating Exp.Time
12:37:19.30 11:49:15.90 2XMMp J123719.3+114915 ACIS-S NONE 50
14:00:52.60 -1:45:11.10 2XMMp J140052.5-014510 ACIS-S NONE 50

Subject Category: NORMAL GALAXIES

Proposal Number: 09620817

Title: Testing binary evolution in pristine ancient dwarf galaxies

PI Name: Rosanne Di Stefano

Type: GO

Dwarfs are the most populous classes of galaxies in the Universe, and provide the building blocks of galaxy formation. We propose to study the X-ray source population in 4 nearby, ancient, isolated dwarfs (Draco, Ursa Min, Sextans and Carina), down to a detection limit ~ 5E33 erg/s. Chandra's spatial resolution will allow a simpler identification of their optical counterparts, separating local sources from background AGN. We will determine whether the accretors are neutron stars or white dwarfs. We will compare the results for pristine dwarfs with those for galaxies with more recent star formation. By determining the spatial and velocity distribution of neutron stars we will have a handle on the dark matter content.

R.A. Dec. Target Name Det. Grating Exp.Time
17:20:12.40 57:54:55.00 Draco ACIS-S NONE 40

Subject Category: NORMAL GALAXIES

Proposal Number: 09620823

Title: Galactic Bulge Latitude Survey -3

PI Name: Jonathan Grindlay

Type: GO

We propose to finish the final 1/3 of our Bulge Latitude Survey (BLS) covering b= -1.5 to +1.5 at l\sim 0\deg. This will increase source statistics to measure radial gradients from SgrA* and constrain the oblateness of the bulge X-ray source population. This full BLS will complement the existing Bulge-Longitude survey and the deeper pointed surveys to measure the source content and distribution in the inner bulge. Infrared and optical imaging down to the confusion limit will enable a sensitive search for counterparts despite varying extinction across the field and will extend the logN-logS analysis for the deeper Bulge Chandra fields.

R.A. Dec. Target Name Det. Grating Exp.Time
17:41:09.30 -28:34:46.70 GBW33 ACIS-I NONE 15
17:41:54.70 -28:41:07.50 GBW34 ACIS-I NONE 15
17:42:41.80 -28:47:22.60 GBW35 ACIS-I NONE 15
17:43:26.50 -28:53:34.00 GBW36 ACIS-I NONE 15
17:46:42.80 -29:19:57.10 GBW13 ACIS-I NONE 15
17:47:30.10 -29:26:28.10 GBW14 ACIS-I NONE 15
17:48:16.80 -29:32:19.50 GBW15 ACIS-I NONE 15
17:49:03.90 -29:38:29.20 GBW16 ACIS-I NONE 15
17:49:49.60 -29:44:42.60 GBW17 ACIS-I NONE 15

Subject Category: NORMAL GALAXIES

Proposal Number: 09620865

Title: A deep observation of NGC4261: understanding its unique X-ray source population, gas morphology, and jet properties.

PI Name: Andreas Zezas

Type: GO

The nearby early-type galaxy NGC4261 reveals strikingly asymmetric distributions of X-ray sources as seen with Chandra, and globular clusters (GC) as seen in the optical band. To address the link between these populations based on their spatial correlation, luminosity function and spectral properties, and to inve- stigate the possibility that this effect is due to the galaxy's merger history, we propose a 100ksec Chandra ACIS-S3 exposure, which will detect X-ray sources down to typical LMXB luminosities (Lx~5E37 erg/s), and HST-WFPC2 observations to obtain a deep census of the GC population over the whole galaxy. These data will also allow a detailed study of its complex gaseous component, and provide information on the unique two-sided X-ray jet.

R.A. Dec. Target Name Det. Grating Exp.Time
12:19:23.00 5:49:31.00 NGC 4261 ACIS-S NONE 100

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 09700043

Title: NGC 1068: Photo-ionized gas in the nucleus, and ionization cone

PI Name: Claude Canizares

Type: GTO

We request a total of 400 ksec of Chandra HETGS observations of the archetypal Seyfert 2 galaxy NGC 1068. The primary goal of these observations is to study the spatially extended photo-ionized emission line gas in the nucleus, and the ionization cone to the northeast. We will examine the Fe XXV lines, radiative recombination continua, He-like triplets and other emission lines to determine the ionization state of the gas. These observations will test the hypothesis that the extended emission is highly photo-ionized.

R.A. Dec. Target Name Det. Grating Exp.Time
2:42:40.70 -0:00:48.00 NGC 1068 ACIS-S HETG 80
2:42:40.70 -0:00:48.00 NGC 1068 ACIS-S HETG 160
2:42:40.70 -0:00:48.00 NGC 1068 ACIS-S HETG 160

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 09700056

Title: LETGS Spectroscopy of the Narrow-Line Seyfert 1 Galaxy Arakelian 564

PI Name: Peter Predehl

Type: GTO

LETGS Spectroscopy of the Narrow-Line Seyfert 1 Galaxy Arakelian 564 to study the warm absorber with its wealth of absorption features (lines and edges) as well as emission lines in the X-ray spectra.

R.A. Dec. Target Name Det. Grating Exp.Time
22:42:39.30 29:43:31.00 Arakelian 564 HRC-S LETG 100

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 09700061

Title: Chandra ACIS Snapshots of the Brightest Radio-Loud Broad Absorption Line Quasars in the SDSS

PI Name: Gordon Garmire

Type: GTO

We propose a Chandra snapshot survey of 13 of the brightest radio-loud broad absorption line quasars (BAL RLQs) in the Sloan Digital Sky Survey (SDSS). These observations will more than triple the number of BAL RLQs with X-ray detections and will allow efficient investigation of the strength and characteristics of intrinsic X-ray absorption. Our sample of notably radio-loud high-ionization BAL quasars (displaying a wide range of outflow velocities and depths) will enable us to test correlations between radio, UV, and X-ray properties and constrain the nature of BALs in RLQs. We will also search for X-ray jets (some targets have extended radio structure) and identify promising candidates for follow-up X-ray and radio observations.

R.A. Dec. Target Name Det. Grating Exp.Time
7:46:10.50 23:07:10.90 SDSS J074610.50+230710.8 ACIS-S NONE 7
8:37:49.60 36:41:45.60 SDSS J083749.59+364145.4 ACIS-S NONE 6
8:56:41.60 42:42:54.00 SDSS J085641.58+424254.1 ACIS-S NONE 6
9:29:14.00 37:57:42.80 SDSS J092913.96+375742.9 ACIS-S NONE 4
10:22:58.40 12:34:29.60 SDSS J102258.41+123429.7 ACIS-S NONE 5
10:54:16.50 51:23:26.20 SDSS J105416.51+512326.0 ACIS-S NONE 5
11:25:07.00 -0:16:47.60 SDSS J112506.95-001647.6 ACIS-S NONE 5
11:59:44.80 1:12:06.80 SDSS J115944.82+011206.9 ACIS-S NONE 4
12:34:11.70 61:58:32.50 SDSS J123411.73+615832.6 ACIS-S NONE 6
13:37:01.40 -2:46:30.40 SDSS J133701.39-024630.3 ACIS-S NONE 5
14:13:34.40 42:12:01.80 SDSS J141334.38+421201.7 ACIS-S NONE 7
16:24:53.50 37:58:06.60 SDSS J162453.47+375806.6 ACIS-S NONE 4

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 09700067

Title: Chandra follow-up observations of Swift/BAT unidentified sources: Searching for obscured type II quasars

PI Name: Peter Predehl

Type: GTO

We propose 5 Chandra follow-up observations, of 5 ks each, of BAT unidentified survey sources. These sources are detected in the ongoing BAT survey using the Maximum Likelihood method (Ajello et al. 2007a, 2007b and Rau et al. 2007).

R.A. Dec. Target Name Det. Grating Exp.Time
4:47:51.10 -41:12:07.20 J0447.8-4112 ACIS-I NONE 5
5:17:08.10 16:33:37.80 J0517.1+1633 ACIS-I NONE 5
7:22:38.20 -9:31:20.60 J0722.6-0931 ACIS-I NONE 5
7:27:34.80 -24:06:14.00 J0727.5-2406 ACIS-I NONE 5
8:11:30.00 9:37:17.00 J0811.5+0937 ACIS-I NONE 5

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 09700091

Title: Simultaneous Chandra, VLT, and APEX Observations of Sgr A*

PI Name: Farhad Yusef-Zadeh

Type: GO

We propose Chandra observations of X-ray flares from Sgr A*, in conjunction with near-IR and submm observations with an already approved observation with the ESO's VLT and APEX. We intend to measure simultaneously the spectral index distribution of flare emission in X-ray, near-IR and submm wavelengths, the time average flux and duration of flares, the statistics of flare activity and to confirm previously reported quasi-periodic variability. These measurements will have far-reaching implications for testing the inverse Compton scattering (ICS) and synchrotron models of low-luminosity flares onto and outflow from supermassive black holes, and constraining the inferred black hole spin.

R.A. Dec. Target Name Det. Grating Exp.Time
17:45:40.00 -29:00:28.10 Sgr A* ACIS-I NONE 29
17:45:40.00 -29:00:28.10 Sgr A* ACIS-I NONE 29
17:45:40.00 -29:00:28.10 Sgr A* ACIS-I NONE 29
17:45:40.00 -29:00:28.10 Sgr A* ACIS-I NONE 29
17:45:40.00 -29:00:28.10 Sgr A* ACIS-I NONE 29
17:45:40.00 -29:00:28.10 Sgr A* ACIS-I NONE 29

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 09700098

Title: AN X-RAY MICROLENSING TEST OF THE AU-SCALE CENTRAL STRUCTURE OF THE QUADRUPLE QUASAR 2237+0305

PI Name: Shin Mineshige

Type: TOO

We propose Chandra observations of the gravitationally lensed quasar Q2237+0305 during a microlensing event to reveal its AU scale central structure. The quasar is being monitored from the ground regularly to ascertain the onset of the event. As it occurs, we will measure X-ray spectral variations with Chandra and compare with those taken before and after the event. Since a small region of the quasar accretion disk is strongly magnified during the event, we will be able to limit the mass contained on scales of several AUs and to probe the physical properties of X-ray emitting gas in the vicinity of the black hole. Together with ground-based telescopes, we can resolve the quasar emission regions at multiple wavelengths. This provide a critical test of quasar accretion disk theories.

R.A. Dec. Target Name Det. Grating Exp.Time
22:40:30.30 3:21:31.00 Q2237+0305 (Einstein Cross) ACIS-S NONE 20
22:40:30.30 3:21:31.00 Q2237+0305 (Einstein Cross) ACIS-S NONE 20
22:40:30.30 3:21:31.00 Q2237+0305 (Einstein Cross) ACIS-S NONE 20
22:40:30.30 3:21:31.00 Q2237+0305 (Einstein Cross) ACIS-S NONE 20
22:40:30.30 3:21:31.00 Q2237+0305 (Einstein Cross) ACIS-S NONE 20

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 09700175

Title: Studying the Optical and X-ray Emission Regions of Quasar RX J1131-1231 by Monitoring Microlensing Events

PI Name: George Chartas

Type: GTO

We proposal to apply the microlensing method to study the spatial structure of the optical and X-ray continuum emission regions of the quasar RX J1131-1231 by comparing the flux ratios of the images in the X-ray and optical over several epochs. The differential changes in the flux ratios with wavelength will then constraint the relative sizes of the optical and X-ray emission regions.

R.A. Dec. Target Name Det. Grating Exp.Time
11:31:51.60 -12:31:57.00 RX J1131-1231 ACIS-S NONE 15
11:31:51.60 -12:31:57.00 RX J1131-1231 ACIS-S NONE 15

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 09700212

Title: Velocity Gradients in the Jets of BL Lac Objects

PI Name: Alan Marscher

Type: GO

We propose to observe the arcsec-scale jets of 2 BL Lac objects with highly relativistic jets (bulk Lorentz factor of 16) on parsec scales in order to determine whether a velocity gradient exists between the axis and edge of the jet and along the length of the jet. Models both for the morphology of jets in BL Lac objects and for the launching of the jet predict such gradients. If radio-selected BL Lac objects are end-on FR 1 sources, there should be strong X-ray emission from inverse Compton scattering of CMB photons along the highly beamed fast spine of the jet. The imaging observations with Chandra, HST, SST, and the VLA will therefore verify whether such a spine exists and on what length scale it decelerates to nonrelativistic speeds.

R.A. Dec. Target Name Det. Grating Exp.Time
8:54:48.90 20:06:30.60 OJ287 ACIS-S NONE 50

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 09700219

Title: Unraveling the accretion structure of the double-peaked emitter SDSS J2125-0813

PI Name: Iskra Strateva

Type: GO

We propose to obtain a 40ks X-ray spectrum of SDSSJ2125-0813 -- the most luminous (L[2-10keV]=6.4E+44ergs/s) radio-quiet quasar that shows signs of accretion-disk emission in the optical. A short exploratory Chandra observation of this object revealed tentative evidence for an unusually strong, ionized, broad Fe Ka line combined with little or no intrinsic absorption. The proposed Chandra observation will confirm or refute the presence of a relativistic Fe Ka line, the first such line to be detected in a double-peaked emitter. Alternatively, the detection of a strong narrow line will provide a rare example of strong Fe Ka emission in an active galaxy with quasar-like luminosity.

R.A. Dec. Target Name Det. Grating Exp.Time
21:25:01.20 -8:13:28.60 SDSS J2125-0813 ACIS-S NONE 40

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 09700252

Title: Lower Luminosity AGNs at Cosmologically Interesting Redshifts: SEDs and Accretion Rates of z~0.36 Seyferts

PI Name: Sarah Gallagher

Type: GO

We propose a multiwavelength campaign to constrain the SEDs of Seyferts at z~0.36. This epoch, corresponding to a look back time of 4 Gyrs, is cosmologically interesting for studies of the coeval development of black holes and their host galaxy bulges. Our sample, comprising 24 Seyferts, has unprecedented high quality Keck spectroscopy and HST imaging already invested to extract host galaxy bulge properties, estimate black hole masses, and separate nuclear and host optical luminosities. To supplement and extend this successful program, we request 93 ks of Chandra time (to measure the shape and power of the AGN-only X-ray continuum), 11 hrs each of Spitzer and Gemini (to constrain the dust temperature), and 7 orbits of HST (to determine the nuclear luminosity for the final 7 objects).

R.A. Dec. Target Name Det. Grating Exp.Time
0:59:16.10 15:38:16.00 S09 ACIS-S NONE 3
1:01:12.10 -9:45:00.70 S10 ACIS-S NONE 3
1:07:16.00 -8:34:29.40 S11 ACIS-S NONE 3
2:13:40.60 13:47:56.00 S12 ACIS-S NONE 3
8:04:28.00 52:23:06.20 S32 ACIS-S NONE 3
9:34:55.60 5:14:09.20 S33 ACIS-S NONE 5.5
10:15:27.30 62:59:11.50 S31 ACIS-S NONE 3
11:05:56.20 3:12:43.20 S21 ACIS-S NONE 4
11:19:37.60 0:56:20.40 S16 ACIS-S NONE 7.3
14:00:16.70 -1:08:22.10 S23 ACIS-S NONE 3
14:00:34.70 0:47:33.40 S24 ACIS-S NONE 3
15:29:22.30 59:28:54.50 S26 ACIS-S NONE 3.7
15:36:51.30 54:14:42.70 S27 ACIS-S NONE 3.7
15:39:16.20 3:23:22.00 S01 ACIS-S NONE 4.3
16:00:02.80 41:30:27.00 S99 ACIS-S NONE 10.1
16:11:11.70 51:31:31.10 S02 ACIS-S NONE 3
16:11:56.30 45:16:11.00 S28 ACIS-S NONE 3.8
17:32:03.10 51:17:51.90 S03 ACIS-S NONE 3.1
21:02:11.50 -6:46:45.00 S04 ACIS-S NONE 3.7
21:04:51.90 -7:12:09.40 S05 ACIS-S NONE 3
21:20:34.20 -6:41:22.20 S06 ACIS-S NONE 3
21:58:41.90 -1:15:00.30 S29 ACIS-S NONE 3.9
23:09:46.10 0:00:48.90 S07 ACIS-S NONE 3
23:59:53.40 -9:36:55.50 S08 ACIS-S NONE 3.8

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 09700284

Title: Coordinated Multiwavelength Observations of New TeV Blazars Detected by VERITAS

PI Name: Markus Boettcher

Type: TOO

We propose a 40 ksec ACIS-S ToO observation on one out of a sample of 10 candidate blazars for TeV emission, currently on the VERITAS observing program. The Chandra ToO observations will be triggered following a detection by VERITAS, which in turn, may be triggered by an extraordinary optical flare. It will only be triggered if the source can not be observed through our approved XMM-Newton ToO. The observations will be coordinated with simultaneous monitoring observations at radio, near-IR, and optical frequencies. For the first time, simultaneous monitoring at MeV - GeV energies will be carried out by GLAST. The proposed campaign aims at the detection of new TeV blazars with meaningful multiwavelength data to allow detailed studies of their broadband spectra and variability.

R.A. Dec. Target Name Det. Grating Exp.Time
0:35:52.60 59:50:05.00 1ES 0033+595 ACIS-S NONE 40
1:23:08.50 34:20:48.00 1ES 0120+340 ACIS-S NONE 40
2:22:39.60 43:02:08.00 3C66A ACIS-S NONE 40
3:24:41.10 34:10:46.00 1H 0323+342 ACIS-S NONE 40
6:50:46.50 25:03:00.00 1ES 0647+250 ACIS-S NONE 40
8:09:49.10 52:18:59.00 1ES 0806+524 ACIS-S NONE 40
8:38:10.90 24:53:43.00 Mrk 1218 ACIS-S NONE 40
12:21:31.70 28:13:59.00 W Comae ACIS-S NONE 40
16:29:01.30 40:08:00.00 1ES 1627+402 ACIS-S NONE 40
22:02:43.30 42:16:40.00 BL Lacertae ACIS-S NONE 40

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 09700302

Title: The inner kpc of NGC4151: the AGN-host interaction region in depth

PI Name: Giuseppina Fabbiano

Type: GO

We propose to observe the nearby Seyfert galaxy NGC4151 with HRC for 50 ks and ACIS-S 1/8 subarray for 200 ks, to study in detail the morphology and spectral properties - both continuum and line emission - of the circumnuclear X-ray diffuse emission, from ~100 pc to a few kpc from the SMBH. We will also study the XRB population of these regions down to flux limits consistent with those of Galactic XRBs, to explore the effect of the luminous AGN on the star-formation processes, of which these sources are an obscuration independent marker. The unprecedented view of the interaction of the SMBH winds with the surrounding ISM will generate strong physical constraints on the properties of this ISM, and will place tight constraints on nonthermal jet emission in low-power radio-quiet AGNs.

R.A. Dec. Target Name Det. Grating Exp.Time
12:10:32.60 39:24:21.00 NGC4151 HRC-I NONE 50
12:10:32.60 39:24:21.00 NGC4151 ACIS-S NONE 40
12:10:32.60 39:24:21.00 NGC4151 ACIS-S NONE 160

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 09700387

Title: A Simple Test of Quasar Outflow Models

PI Name: Frederick Hamann

Type: GO

Energetic outflows are important components of quasar environments. They give rise to a variety of UV absorption lines in quasar spectra and they are believed to originate from the inner accretion disk. In some sources, there is direct evidence for the UV lines forming in an outflow very near the central engine based on partial coverage of the background light source. However, in some of these same absorbers, there is also contradictory evidence for low densities that require extremely large distances (>10kpc to >100kpc) based on photoionization. We propose Chandra ACIS-S observations that will either resolve or confirm this contradiction and thereby test our understanding of basic outflow properties.

R.A. Dec. Target Name Det. Grating Exp.Time
1:08:21.80 6:23:27.60 Q105+061 ACIS-S NONE 20
1:22:27.90 -4:21:27.50 PKS 0119-046 ACIS-S NONE 7
20:47:19.70 -16:39:05.80 PKS 2044-168 ACIS-S NONE 7

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 09700405

Title: Deconstructing the Accretion Disk Wind in Quasars

PI Name: Gordon Richards

Type: GO

Radiation and MHD driven accretion disk winds are reaching a level of maturity in explaining the observational signatures of quasars in the broad emission (and absorption) line regions. Further advancement of the models requires additional empirical input to provide observational constraints. One of the most robust indicators of a disk wind (other than broad absorption troughs) is the blueshift of the CIV emission line with respect to the systemic redshift. This proposal seeks to obtain good S/N (~100 counts) Chandra observations of 18 bright SDSS quasars (189.2 ks in total) in order to confirm a previous trend seen in joint spectral fitting of exploratory observations of large CIV blueshift quasars and to test radiation driven wind models for radio quiet quasars.

R.A. Dec. Target Name Det. Grating Exp.Time
0:51:02.40 -1:02:44.40 SDSS J0051-0102 ACIS-S NONE 3.5
1:48:12.20 0:01:53.20 SDSS J0148+0001 ACIS-S NONE 10.5
2:08:45.50 0:22:36.00 SDSS J0208+0022 ACIS-S NONE 3.5
9:00:07.10 32:19:21.90 SDSS J0900+3219 ACIS-S NONE 11
10:04:01.30 42:31:23.00 SDSS J1004+4231 ACIS-S NONE 8.1
10:29:07.10 65:10:24.60 SDSS J1029+6510 ACIS-S NONE 9.4
11:53:51.10 11:36:49.20 SDSS J1153+1136 ACIS-S NONE 11
14:19:49.40 6:06:54.00 SDSS J1419+0606 ACIS-S NONE 9.9
15:03:13.60 57:51:51.60 SDSS J1503+5751 ACIS-S NONE 10
16:26:22.10 29:52:37.40 SDSS J1626+2952 ACIS-S NONE 10.9

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 09700422

Title: Investigating the physics behind the X-ray / radio offset in 4C 74.26

PI Name: Mary Erlund

Type: GO

4C 74.26 is the largest known radio quasar; its southern hotspot complex contains the most luminous known X-ray hotspot and, intriguingly it also has the largest detected angular offset between its radio and X-ray hotspot peaks. We propose to image the X-ray hotspot complex, making use of Chandra's exquisite spatial resolution to resolve the X-ray hotspot(s), going deeper that existing archival data. In so doing we can determine whether the X-ray / radio hotspot offset is the result of inverse-Compton beaming of the cosmic microwave background in a decelerating flow (Georganopoulos & Kazanas 2003) or the dentist's drill effect (Scheuer 1982) enabling us to learn about the dynamics of the jet in more detail.

R.A. Dec. Target Name Det. Grating Exp.Time
20:42:58.70 75:03:13.00 4C 74.26 Southern Hotspot ACIS-S NONE 50

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 09700450

Title: X-Ray Emission in Radio-Quiet z>4 Quasars: A New Perspective on the AGN-Starburst-Connection?

PI Name: Dominik Riechers

Type: GO

We propose to investigate the nature of the extended X-ray emission detected toward the starbursting quasar BR1202-0725 (z=4.7), and to search for X-ray emission in BRI1335-0417 (z=4.4), with Chandra/ACIS. These sources are the only unlensed z>4 AGN-starburst systems that are resolved in molecular gas (CO), FIR and radio continuum emission. Shallow archival ACIS observations of BR1202 show two components (X1/X2). X1 is coincident with the optical quasar, and shows tentative evidence for a radio-quiet X-ray jet emerging from the AGN. X2 is only tentatively detected, which would be first evidence for an AGN. We here propose to confirm both tentative results in BR1202, and to obtain first X-ray observations of BRI1335.

R.A. Dec. Target Name Det. Grating Exp.Time
12:05:23.10 -7:42:33.00 BR1202-0725 ACIS-S NONE 30

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 09700467

Title: A Chandra survey of IMBH AGNs with low Eddington ratios

PI Name: Weimin Yuan

Type: GO

Intermediate mass black holes (IMBH) are an important class of objects. Interesting results have been obtained recently from a study with Chandra on a sample of IMBH AGN by Greene & Ho (2007, ApJ, 656, 84), which comprises mostly objects accreting at relatively high Eddington ratios. However, little is known about their low accretion counterparts as a class. We propose to observe a well defined, nearest sample of eight IMBH AGN (black hole masses $<10^{6}M_{\odot}$) with the least estimated Eddington ratios (0.01-0.1), which were discovered in our recent work. We aim at detecting their X-ray emission in order to secure their low accretion nature. This work complements that by Greene & Ho (2007) by extending Eddington ratio into a previously unexplored region in the parameter space.

R.A. Dec. Target Name Det. Grating Exp.Time
0:40:42.10 -11:09:57.60 004042.10-110957.6 ACIS-S NONE 5
7:43:45.50 48:08:13.20 074345.47+480813.5 ACIS-S NONE 5
11:26:37.80 51:34:23.20 112637.74+513423.0 ACIS-S NONE 5
13:04:57.00 39:55:29.60 130456.95+395529.7 ACIS-S NONE 5

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 09700477

Title: Dissecting Accretion Disks

PI Name: Christopher Kochanek

Type: GO

We will use microlensing, where the stars in a lens galaxy magnify the accretion disk of a lensed quasar, to measure the sizes of the X-ray emission regions of 6 gravitationally lensed quasars with well-sampled optical light curves. For RXJ1131-1231 and Q2237+0305, where we have already measured the average 0.4-8 keV band X-ray size to be comparable to the inner edge of the accretion disk, we will use longer observations in order to measure the X-ray energy dependence of the size. For PG1115+080 and HE1104-1805, we will extend their X-ray light curves to get an accurate 0.4-8 keV size measurement. For the last two systems, QJ0158-4325 and SDSS1004+4112, we will evaluate whether they are good candidates for measuring the size of the X-ray emission region with microlensing.

R.A. Dec. Target Name Det. Grating Exp.Time
11:31:51.60 -12:31:57.00 RXJ1131-1231 ACIS-S NONE 15
11:31:51.60 -12:31:57.00 RXJ1131-1231 ACIS-S NONE 15
11:31:51.60 -12:31:57.00 RXJ1131-1231 ACIS-S NONE 15
11:31:51.60 -12:31:57.00 RXJ1131-1231 ACIS-S NONE 15

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 09700482

Title: Orientation effects in the X-ray and multi-wavelength properties of high-z, 3CRR quasars.

PI Name: Belinda Wilkes

Type: GO

We propose X-ray observations of 24 sources to complete a subset of 38 radio-lobe-selected, 3CRR massive radio galaxies in the redshift range 1\leq z \leq 2. We will measure the strength of the nuclear activity and study the relation of X-ray flux and spectral hardness to orientation, estimated from the radio core-dominance. In combination with the rich, multi-wavelength dataset for this inclination unbiased sample (to include Spitzer 3.6$-$70$\mu$m photometry), we will test AGN Unification at these redshifts. SED fitting will also provide constraints on models for the obscuring material, allow us to estimate the relative numbers of obscured and unobscured quasars and to quantify selection effects likely to be present in X-ray samples due to orientation.

R.A. Dec. Target Name Det. Grating Exp.Time
0:34:14.70 39:24:12.80 3CRR 13 ACIS-S NONE 20
0:36:06.40 18:37:58.70 3CRR 14 ACIS-S NONE 3
1:29:59.70 23:38:19.10 3CRR 43 ACIS-S NONE 3
2:23:43.40 40:00:52.30 3CRR 65 ACIS-S NONE 20
2:32:28.80 34:23:46.40 3CRR 68.1 ACIS-S NONE 3
2:34:23.80 31:34:18.20 3CRR 68.2 ACIS-S NONE 20
7:28:10.20 14:37:35.60 3CRR 181 ACIS-S NONE 3
8:01:33.50 14:14:42.30 3CRR 190 ACIS-S NONE 3
8:37:44.90 65:13:35.00 3CRR 204 ACIS-S NONE 3
8:39:06.50 57:54:16.50 3CRR 205 ACIS-S NONE 10
8:53:08.60 13:52:53.30 3CRR 208 ACIS-S NONE 3
10:21:54.60 21:59:30.80 3CRR 241 ACIS-S NONE 20
11:11:32.90 35:40:40.50 3CRR 252 ACIS-S NONE 20
11:45:43.40 49:46:07.30 3CRR 266 ACIS-S NONE 20
11:49:56.50 12:47:19.10 3CRR 267 ACIS-S NONE 20
12:09:13.60 43:39:20.60 3CRR 268.4 ACIS-S NONE 3
12:20:34.00 33:43:11.50 3CRR 270.1 ACIS-S NONE 10
15:20:05.50 20:16:04.40 3CRR 318 ACIS-S NONE 10
17:24:19.30 50:57:36.10 3CRR 356 ACIS-S NONE 20
17:34:42.50 16:00:31.80 4C 16.49 ACIS-S NONE 3
18:01:38.90 13:51:24.30 4C13.66 ACIS-S NONE 20
18:05:06.40 11:01:30.20 3CRR 368 ACIS-S NONE 20
21:47:25.20 15:20:33.30 3CRR 437 ACIS-S NONE 20
23:55:23.00 79:55:17.60 3CRR 469.1 ACIS-S NONE 20
23:58:35.90 44:04:45.00 3CRR 470 ACIS-S NONE 20

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 09700497

Title: Short-time monitoring of extreme spectral variations in Seyfert 2s

PI Name: GUIDO RISALITI

Type: GO

We propose two ~3 weeks monitoring campaigns consisting of five 10 ks observations each, of two Seyfert Galaxies which were observed both in reflection-dominated and in transmission-dominated states in past observations. The aim is to detect such dramatic variations on time scales of a few days. A Chandra monitoring campaign analogous to the ones proposed here, performed in 2006 on NGC 1365 provided a spectacular result: a spectral change from Compton-thin to Compton-thick and back to Compton-thin in four days. If found in other sources, these extreme variations would demonstrate that the thick absorber in Seyfert Galaxies is extremely compact (on the spatial scale of the broad line region).

R.A. Dec. Target Name Det. Grating Exp.Time
8:04:05.80 5:06:50.00 UGC 4203 ACIS-S NONE 10
8:04:05.80 5:06:50.00 UGC 4203 ACIS-S NONE 10
8:04:05.80 5:06:50.00 UGC 4203 ACIS-S NONE 10
8:04:05.80 5:06:50.00 UGC 4203 ACIS-S NONE 10
8:04:05.80 5:06:50.00 UGC 4203 ACIS-S NONE 10

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 09700570

Title: Shock-heating by double-lobed radio sources in spiral galaxies

PI Name: Judith Croston

Type: GO

Shock heating by radio galaxies is thought to be an important means of transferring energy from active galactic nuclei to their environments. With recent Chandra observations, we have found evidence for strongly shocked gas surrounding two nearby, low-power radio galaxies, Centaurus A and NGC 3801, with large amounts of energy transferred from the AGN to the galaxy ISM in these systems, which will permanently increase the gas entropy. Although these two known examples of strong shocks both occur in elliptical galaxies, similar radio sources are found in a range of host galaxy types. To investigate the range of environments in which radio-galaxy shock heating can be important, we propose to observe three small, overpressured, double-lobed radio sources in nearby, active spiral galaxies.

R.A. Dec. Target Name Det. Grating Exp.Time
19:08:16.60 50:55:59.00 NGC6764 ACIS-S NONE 20

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 09700606

Title: A Chandra Survey of Nearby X-shaped Radio Galaxies

PI Name: Christopher Reynolds

Type: GO

The unusual morphology of winged or X-shaped radio galaxies (XRGs) has been attributed to rapid changes in the spin axis of the jet-producing black hole during the merger of two supermassive black holes (SMBH). However, an alternative scenario posits that the wings are due to hydrodynamic blow-out of the (normal) radio-galaxy back-flow along the minor axis of a non-spherical ISM distribution. We plan to test the backflow model in a sample of nearby XRGs by correlating the minor axis of the ICM distribution with the radio-wings. Here, we propose the first stage of this program - a Chandra survey of all previously unobserved XRGs within z=0.1 (10ks observations of 14 objects). The results of this survey will be used to select optimal sources for detailed investigation in future cycles.

R.A. Dec. Target Name Det. Grating Exp.Time
5:16:03.10 24:58:25.00 J0516+2458 (3C136.1) ACIS-S NONE 10
8:05:35.00 24:09:50.00 J0805+2458 (3C192) ACIS-S NONE 10
8:31:27.50 32:19:26.00 J0831+3219 (4C+32.25) ACIS-S NONE 10
10:20:53.60 48:31:24.00 J1020+4831 (4C+48.29) ACIS-S NONE 10
10:43:18.60 31:31:06.10 J1043+3131 ACIS-S NONE 10
11:01:33.00 16:43:52.00 J1101+1640 (Abell 1145) ACIS-S NONE 10
16:06:12.70 0:00:27.10 J1606+0000 (4C+00.58) ACIS-S NONE 10

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 09700655

Title: NGC 4388 the Last Remaining Source - Chandra HETG Constrains on the Fe K line region

PI Name: Richard Mushotzky

Type: GO

High spectral resolution x-ray observations of AGN in the Fe K band have been critical for a set of important discoveries including ionized outflowing absorbers, Compton scattering shoulders on the Fe K lines, strong tests of the broad lines in AGN, and the dynamics of the Fe K line region. Thus high to moderate S/N, high resolution x-ray spectra are vital for understanding the geometry of the central regions. Most archival Chandra HETG observations of AGN are severely hampered by low S/N and to date there have been only two 'good' S/N grating observations of Seyfert IIs in the Fe K line region. We propose to obtain HETG for the only remaining object, NGC 4388, that is bright enough to get high S/N observations in the Fe K band in less than 300 ks .

R.A. Dec. Target Name Det. Grating Exp.Time
12:25:46.60 12:39:43.00 NGC 4388 ACIS-S HETG 115
12:25:46.60 12:39:43.00 NGC 4388 ACIS-S HETG 160

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 09700656

Title: THE NATURE OF ENERGY TRANSPORT AND PARTICLE ACCELERATION IN THE TRANSITIONAL FRI/FRII RADIO GALAXY 3C 288

PI Name: Daniel Evans

Type: GO

We propose a 40-ks ACIS-S imaging observation of 3C 288, the prototypical example of a `jetted double' radio galaxy, which displays an unusually powerful, dissipative (FRI-like) radio jet and counterjet, but FRII-like large-scale radio features. Our observations have two distinct science goals: (1) to study the hot-gas environment of 3C 288, in order to establish how the thermal atmosphere influences the propagation of the radio jet, and what its role is in governing the transitional FRI/FRII morphology of the radio outflow, and (2) to examine the methods of particle acceleration and energy transport in a dissipative jet and counterjet 100 times more radio luminous than any known FRI jet.

R.A. Dec. Target Name Det. Grating Exp.Time
13:38:50.00 38:51:09.80 3C 288 ACIS-S NONE 40

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 09700701

Title: The Chandra view of NGC~3621: A bulgeless galaxy hosting an AGN?

PI Name: Mario Gliozzi

Type: GO

We propose to observe for 25 ks the nearby bulgeless galaxy NGC3621, which is optically classified as a normal galaxy but has recently been discovered by Spitzer mid-IR spectroscopy to contain an AGN. The unique capabilities of Chandra will be exploited to: disentangle the different components contributing to the X-ray emission and perform spatially-resolved spectroscopy; estimate the bolometric luminosity of the nuclear region; study the X-ray variability and put constrains on the black hole mass; investigate the circum-nuclear spatial and spectral properties to constrain the fuel reservoir. The proposed pilot study will open up opportunities to study the characteristics of the largely unexplored low black hole mass regime and the low mass end of the M_BH-sigma relation.

R.A. Dec. Target Name Det. Grating Exp.Time
11:18:16.50 -32:48:51.00 NGC3621 ACIS-S NONE 25

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 09700736

Title: Surveying X-ray Jets in Superluminal Blazars

PI Name: Matthew Lister

Type: GO

We propose a survey to search for X-ray emission associated with powerful FR-II jets in radio-loud AGN. Our sample is drawn from the MOJAVE program, which is currently studying the spectral and evolutionary properties of the 133 brightest and most compact AGN in the northern sky. Using the parsec-scale Lorentz and Doppler factors derived from our VLBA observations, we will evaluate current models for kiloparsec-scale X-ray jet emission, and address the longstanding question as to where deceleration is occurring in powerful extragalactic jets. All 32 AGN in our survey have extended jets at radio wavelengths, and 12 of 18 have been detected in X-rays with archival observations. We propose to obtain 10 ksec ACIS-S integrations of the 14 remaining AGN not yet observed with Chandra.

R.A. Dec. Target Name Det. Grating Exp.Time
1:08:38.80 1:35:00.30 0106+013 ACIS-S NONE 10
1:21:41.60 11:49:50.40 0119+115 ACIS-S NONE 10
2:28:50.00 67:21:03.00 0224+671 ACIS-S NONE 10
4:18:21.30 38:01:35.80 0415+379 ACIS-S NONE 10
5:32:39.00 7:32:43.00 0529+075 ACIS-S NONE 10
10:48:06.60 -19:09:35.70 1045-188 ACIS-S NONE 10
13:37:39.80 -12:57:24.60 1334-127 ACIS-S NONE 10
16:38:13.40 57:20:23.90 1637+574 ACIS-S NONE 10
18:01:32.30 44:04:21.90 1800+440 ACIS-S NONE 10
18:49:16.10 67:05:41.60 1849+670 ACIS-S NONE 10
21:58:06.30 -15:01:09.30 2155-152 ACIS-S NONE 10
22:03:15.00 31:45:38.20 2201+315 ACIS-S NONE 10
22:18:52.00 -3:35:36.00 2216-038 ACIS-S NONE 10
23:48:02.60 -16:31:12.00 2345-167 ACIS-S NONE 10

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 09700745

Title: Towards a Complete Sample: 3CR Extragalactic Radio Sources with z < 0.3

PI Name: Daniel Harris

Type: GO

In the last decade we performed a series of HST snapshot surveys of the 3CR sample that proved to be one of the most productive HST programs. As the completeness of high resolution X-ray observations, crucial for all multiwavelength analyses, lags far behind, we propose a Chandra snapshot survey of all unobserved 3CR sources with z<0.3: half now; half next year. An integration time of 8ks each will provide the data quality well suited to address the nature and propagation of jets, the physics of the environment, and will be relevant to evaluate the AGN unified models. The observations will also provide a versatile, complete, and uniform database that will be a valuable resource for the astronomical community, and since it is designed as a 'legacy' program, we waive proprietary rights.

R.A. Dec. Target Name Det. Grating Exp.Time
0:38:20.50 -2:07:40.30 3C17 ACIS-S NONE 8
0:40:50.30 10:03:23.40 3C18 ACIS-S NONE 8
0:43:09.20 52:03:33.50 3C20 ACIS-S NONE 8
1:09:44.30 73:11:57.40 3C33.1 ACIS-S NONE 8
1:48:28.70 53:32:42.00 3C52 ACIS-S NONE 8
2:23:12.80 86:19:13.70 3C61.1 ACIS-S NONE 8
3:03:15.00 16:26:18.00 3C76.1 ACIS-S NONE 8
4:07:25.50 3:40:47.50 3C105 ACIS-S NONE 8
4:56:43.00 22:49:22.00 3C132 ACIS-S NONE 8
5:02:58.50 25:16:25.40 3C133 ACIS-S NONE 8
5:14:08.60 0:56:32.70 3C135 ACIS-S NONE 8
6:09:32.60 48:04:15.60 3C153 ACIS-S NONE 8
6:43:06.70 23:19:00.30 3C165 ACIS-S NONE 8
6:55:14.90 54:08:59.40 3C171 ACIS-S NONE 8
7:43:01.40 80:26:25.60 3C184.1 ACIS-S NONE 8
8:21:32.60 47:02:46.10 3C197.1 ACIS-S NONE 8
9:01:05.30 29:01:47.20 3C213.1 ACIS-S NONE 8
9:41:24.00 39:44:41.60 3C223.1 ACIS-S NONE 8
13:32:53.30 2:00:45.00 3C287.1 ACIS-S NONE 8
13:52:17.90 31:26:46.50 3C293 ACIS-S NONE 8
14:23:00.00 19:35:37.00 3C300 ACIS-S NONE 8
14:43:14.00 77:07:30.00 3C303.1 ACIS-S NONE 8
14:49:21.80 63:16:14.10 3C305 ACIS-S NONE 8
15:13:40.10 26:07:31.20 3C315 ACIS-S NONE 8
15:47:43.60 20:52:16.70 3C323.1 ACIS-S NONE 8
16:17:42.80 32:22:28.70 3C332 ACIS-S NONE 8
16:59:29.50 47:02:44.10 3C349 ACIS-S NONE 8
18:33:46.20 47:27:00.70 3C381 ACIS-S NONE 8
21:44:11.70 28:10:18.90 3C436 ACIS-S NONE 8
23:21:28.50 23:46:47.50 3C460 ACIS-S NONE 8

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 09700792

Title: X-ray properties of compact CSS quasar with BALs - 1045+352

PI Name: Magdalena Kunert-Bajraszewska

Type: GO

We propose a 5 ksec observation with Chandra ACIS-S to detect for the first time an X-ray emission from the high ionization broad absorption line (HiBAL) compact steep spectrum (CSS) radio-loud quasar 1045+352. The X-ray information is critical to studies of the environment of BALQSOs. Radio-loud BALs have important additional information about their orientation based on the radio morphology, but they are rare. Only a handful of radio-loud BALs observed in X-rays so far indicating their high intrinsic absorption columns. The proposed target has a deep radio data and known optical spectrum. The new X-ray Chandra data will put a stringent limit on the absorption column by direct measure of the absorption in the spectrum or suppression of the predicted X-ray flux.

R.A. Dec. Target Name Det. Grating Exp.Time
10:48:34.20 34:57:25.00 1045+352 ACIS-S NONE 5

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 09700908

Title: Monitoring the Giant Flare of HST-1 in the M87 Jet

PI Name: John Biretta

Type: GO

(Abridged)During 2002, HST and Chandra monitoring of the M87 jet detected a dramatic flare in knot HST-1 located ~1" from the nucleus. Its optical brightness eventually increased seventy-fold and peaked in 2005; the X-rays show a similarly dramatic outburst. In both bands HST-1 is still extremely bright and greatly out-shines the galaxy nucleus. To our knowledge this is the first incidence of an optical or X-ray outburst from a jet region which is spatially distinct from the core source; this presents an unprecedented opportunity to study the processes responsible for non-thermal variability and the X-ray emission. We propose six epochs of HST flux monitoring during Cycle 16, as well as seven epochs of Chandra/ACIS observation (5ksec each, six Chandra epochs contemporary with HST).

R.A. Dec. Target Name Det. Grating Exp.Time
12:30:49.00 12:23:30.00 M87 ACIS-S NONE 5
12:30:49.00 12:23:30.00 M87 ACIS-S NONE 5
12:30:49.00 12:23:30.00 M87 ACIS-S NONE 5
12:30:49.00 12:23:30.00 M87 ACIS-S NONE 5
12:30:49.00 12:23:30.00 M87 ACIS-S NONE 5
12:30:49.00 12:23:30.00 M87 ACIS-S NONE 5
12:30:49.00 12:23:30.00 M87 ACIS-S NONE 5

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 09800046

Title: Chandra Observations of SZ-selected Galaxy Clusters Detected by the South Pole Telescope

PI Name: Gordon Garmire

Type: GTO/TOO

We propose a 200 ks program to for Chandra follow-up of some of the first massive galaxy clusters detected in the forthcoming South Pole Telescope (SPT) cluster survey. Our program (in conjunction with companion GTO observations by the HRC team) will provide a pathfinder for future much larger investments of Chandra time to follow-up the 200 most massive clusters detected in the SPT survey. This larger program will provide significant constraints on dark energy in its own right, and will greatly amplify the the cosmological power and reliability of the SPT survey.

R.A. Dec. Target Name Det. Grating Exp.Time
5:24:00.00 -54:30:00.00 SPT-6 ACIS-I NONE 20
5:24:00.00 -54:00:00.00 SPT-3 ACIS-I NONE 20
5:24:00.00 -53:30:00.00 SPT-9 ACIS-I NONE 20
5:30:00.00 -54:30:00.00 SPT-4 ACIS-I NONE 20
5:30:00.00 -54:00:00.00 SPT-1 ACIS-I NONE 20
5:30:00.00 -53:30:00.00 SPT-7 ACIS-I NONE 20
5:36:00.00 -54:30:00.00 SPT-5 ACIS-I NONE 20
5:36:00.00 -54:00:00.00 SPT-2 ACIS-I NONE 20
5:36:00.00 -53:30:00.00 SPT-8 ACIS-I NONE 20
23:30:00.00 -55:30:00.00 SPT-10 ACIS-I NONE 20

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 09800120

Title: South Pole Telescope (SPT) - Chandra Cluster Cosmology

PI Name: Stephen Murray

Type: GTO/TOO

We propose Chandra ACIS-I observations of a mass limited set of clusters detected by the South Pole Telescope using the redshift-independent Sunyaev-Zeldovich effect (SZE). This exploration will find the first clusters detected through their SZE signature on the cosmic microwave background. Ultimately, we expect to observe a sample of 200 clusters at z>0.5 with masses greater than 3x10^14 Msun. We will measure gas temperatures to an accuracy of better than 15% and gas masses to an accuracy of 8%. We will 1) combine the X-ray and SZE data to test d(z) 2) use the X-ray Y parameter (Y=M_gas * T_gas) to derive the cluster mass function which is a sensitive probe of cosmological parameters and 3) improve the reliability of cluster mass estimates using the X-ray mass proxies.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 SPT1 ACIS-I NONE 10
0:00:00.00 0:00:00.00 SPT2 ACIS-I NONE 10
0:00:00.00 0:00:00.00 SPT3 ACIS-I NONE 10
0:00:00.00 0:00:00.00 SPT4 ACIS-I NONE 10
0:00:00.00 0:00:00.00 SPT5 ACIS-I NONE 10
0:00:00.00 0:00:00.00 SPT6 ACIS-I NONE 10
0:00:00.00 0:00:00.00 SPT7 ACIS-I NONE 10
0:00:00.00 0:00:00.00 SPT8 ACIS-I NONE 10
0:00:00.00 0:00:00.00 SPT9 ACIS-I NONE 10
0:00:00.00 0:00:00.00 SPT10 ACIS-I NONE 10
0:00:00.00 0:00:00.00 SPT11 ACIS-I NONE 10
0:00:00.00 0:00:00.00 SPT12 ACIS-I NONE 10
0:00:00.00 0:00:00.00 SPT13 ACIS-I NONE 10
0:00:00.00 0:00:00.00 SPT14 ACIS-I NONE 10
0:00:00.00 0:00:00.00 SPT15 ACIS-I NONE 10
0:00:00.00 0:00:00.00 SPT16 ACIS-I NONE 10
0:00:00.00 0:00:00.00 SPT17 ACIS-I NONE 10
0:00:00.00 0:00:00.00 SPT18 ACIS-I NONE 10
0:00:00.00 0:00:00.00 SPT19 ACIS-I NONE 10
0:00:00.00 0:00:00.00 SPT20 ACIS-I NONE 10
0:00:00.00 0:00:00.00 SPT21 ACIS-I NONE 10
0:00:00.00 0:00:00.00 SPT22 ACIS-I NONE 10
0:00:00.00 0:00:00.00 SPT23 ACIS-I NONE 10
0:00:00.00 0:00:00.00 SPT24 ACIS-I NONE 10
0:00:00.00 0:00:00.00 SPT25 ACIS-I NONE 10
0:00:00.00 0:00:00.00 SPT26 ACIS-I NONE 10
0:00:00.00 0:00:00.00 SPT27 ACIS-I NONE 10
0:00:00.00 0:00:00.00 SPT28 ACIS-I NONE 10
0:00:00.00 0:00:00.00 SPT29 ACIS-I NONE 10
0:00:00.00 0:00:00.00 SPT30 ACIS-I NONE 10

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 09800154

Title: Characterisation of the most distant cluster of galaxies, JKCS041 at z=1.91

PI Name: Stefano Andreon

Type: GO

The number of high-redshift galaxy clusters is scarce, with only few systems known at z>1 and the highest cluster scoring z=1.45. We propose a 80 ks Chandra observation in order to characterise the most distant X-ray detected cluster of galaxies known thus far, JKCS041, at z=1.9, recently discovered by us and for which we have extensive imaging (radio, optical, near-infrared, mid-infrared, UV) data already in hand and spectroscopy in progress. These observations will ensure the first measure of X-ray properties of clusters at this distance and significantly enlarge the redshift baseline of the scaling relations.

R.A. Dec. Target Name Det. Grating Exp.Time
2:26:44.00 -4:41:45.00 JKCS 041 ACIS-S NONE 80

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 09800310

Title: Probing Dark Energy with Relaxed Galaxy Clusters

PI Name: Steven Allen

Type: LP

We seek to constrain dark energy using studies of the apparent evolution of the X-ray gas mass fraction in the most X-ray luminous, dynamically relaxed galaxy clusters. The proposed observations will improve the detection of the effects of dark energy from the X-ray data alone to > 5 sigma. More importantly, they will allow us to measure the level of intrinsic (systematic) scatter in distance measurements from this technique and establish whether this is smaller than from type Ia supernovae measurements. Used in combination with supernovae and CMB data, the new Chandra observations will allow the most precise search to date for evolution in the dark energy equation of state - our best approach in trying to understand the origin of cosmic acceleration.

R.A. Dec. Target Name Det. Grating Exp.Time
1:59:49.30 8:49:59.20 MACS0159 ACIS-I NONE 20
4:39:02.30 5:20:43.60 RXJ0439-0520 ACIS-I NONE 30
10:23:39.40 4:11:14.30 Zwicky 3146 ACIS-I NONE 40
11:15:52.10 1:29:52.90 MACS1115 ACIS-I NONE 40
13:11:01.60 -3:10:40.00 MACS1311 ACIS-I NONE 30
13:59:10.30 -19:29:24.40 MACS1359 ACIS-I NONE 50
14:27:16.20 44:07:31.00 MACS1427+44 ACIS-I NONE 40
14:27:39.40 -25:21:02.00 MACS1427-25 ACIS-I NONE 30
16:21:24.80 38:10:09.00 MACS1621 ACIS-I NONE 60
20:46:00.60 -34:30:17.00 MACS2046 ACIS-I NONE 40
21:29:39.90 0:05:20.00 RXJ2129+0005 ACIS-I NONE 30
22:29:45.30 -27:55:36.90 MACS2229 ACIS-I NONE 15
23:08:22.10 -2:11:29.10 Abell 2537 ACIS-I NONE 40

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 09800313

Title: Bubble heating in Extreme Cooling Clusters

PI Name: Steven Allen

Type: GO

Our proposal targets `extreme cooling' clusters: those systems with the largest, fastest cooling rates that most severely challenge the AGN-heating paradigm for cluster cores. By targeting two X-ray bright `extreme cooling cluters' with the clearest radio bubbles in their cores, we seek to establish whether it is possible for AGN heating to balance cooling in such systems. If cooling is not balanced by some heat source, then large residual cooling rates should be detectable in the spectral X-ray data. We will measure the bubble properties precisely and map the spatial-spectral structure of the surrounding X-ray gas, searching for ghost bubbles, shocks, ripples, fronts and non-thermal emission.

R.A. Dec. Target Name Det. Grating Exp.Time
19:31:49.60 -26:34:34.00 MACSJ1931.8-2634 ACIS-S NONE 100

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 09800349

Title: SCALING RELATIONS FOR LOW-MASS GALAXY CLUSTERS AND GROUPS

PI Name: Alexey Vikhlinin

Type: GO

Detailed measurements of the cluster scaling relations (e.g., L-T) require 1) large, objectively selected, statistically complete samples, and 2) observations that cover a large fraction of the system's virial radius. Such data are now available in the Chandra archive for a large number of high-M clusters, but not for the systems with T ~ 2 keV and below. We propose to fill this gap by observing a sample of 22 low-L objects from a new, sensitive X-ray survey. These observations will quadruple the statistics for low-T clusters and extend the reliable determination

R.A. Dec. Target Name Det. Grating Exp.Time
0:57:24.70 -26:16:49.00 cl0057-2616 ACIS-I NONE 10
2:37:59.60 -52:24:47.00 cl0237-5224 ACIS-I NONE 14
2:45:45.70 9:36:36.00 cl0245+0936 ACIS-I NONE 16
3:06:28.70 -9:43:50.00 cl0306-0943 ACIS-I NONE 10
3:27:54.50 2:33:47.00 cl0327+0233 ACIS-I NONE 11
3:34:03.30 -39:00:46.00 cl0334-3900 ACIS-I NONE 16
3:36:49.40 -28:04:53.00 cl0336-2804 ACIS-I NONE 11
3:40:27.20 -28:40:20.00 cl0340-2840 ACIS-I NONE 10
8:38:31.40 19:48:15.00 cl0838+1948 ACIS-I NONE 20
10:58:12.60 1:36:58.00 cl1058+0136 ACIS-I NONE 10
12:06:33.50 -7:44:24.00 cl1206-0744 ACIS-I NONE 10
12:59:51.00 31:20:48.00 cl1259+3120 ACIS-I NONE 18
13:49:00.20 49:18:33.00 cl1349+4918 ACIS-I NONE 19
15:33:17.10 31:08:55.00 cl1533+3108 ACIS-I NONE 10
16:30:14.70 24:34:47.00 cl1630+2434 ACIS-I NONE 10
22:20:09.10 -52:28:01.00 cl2220-5228 ACIS-I NONE 10

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 09800363

Title: The X-ray Luminous Cluster underlying the Radio-Quiet Quasar H1821+643

PI Name: Andrew Fabian

Type: GO

We propose to make a direct imaging study of the only low redshift galaxy cluster to contain a highly luminous quasar, H1821+643. Existing Chandra observations of the X-ray bright cluster are only noisy snapshots, having been performed using gratings, which much reduce the effective area, do not decrease the background, and produce diffraction spikes. Even these observations strongly hint at an interaction between the jets and outflows of the quasar on its surroundings, in terms of rings of brighter emission possibly indicating shocks. In addition the northern FRI lobe of the quasar also appears to be detected in emission. We expect to learn much about cluster-quasar interaction from this unique object.

R.A. Dec. Target Name Det. Grating Exp.Time
18:21:57.40 64:20:37.00 H1821+643 ACIS-S NONE 90

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 09800379

Title: The Filamentary Structure of the Hot Gas in the NGC5044 Group

PI Name: Laurence David

Type: GO

An early 20~ksec Chandra observation of the X-ray bright NGC 5044 group revealed an extensive system of cool X-ray filaments and cavities in the central region of the group. The similarity of these structures with those observed in other cooling flows suggests that they were produced AGN outbursts. We recently obtained GMRT data on NGC 5044 and detected 40 mJ of unresolved emission. NGC 5044 has also been extensively observed in the optical and IR (including a recent Spitzer observation). There is a strong spatial correlation between the $H_{\alpha}$ filaments, dust, and cool x-ray filaments in NGC 5044. We propose a 80~ksec Chandra observation of NGC5044 to determine the relationships between the radio emitting plasma, molecular gas, ionized gas, dust, and x-ray emitting gas.

R.A. Dec. Target Name Det. Grating Exp.Time
13:15:24.00 -16:23:06.80 NGC 5044 ACIS-S NONE 80

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 09800437

Title: The Link between optical nebulae and feedback in cluster cores

PI Name: Roderick Johnstone

Type: GO

The presence of luminous optical emission-line nebulae in brightest cluster galaxies is a dramatic marker for the presence of feedback or heating from the central active nucleus to the intracluster medium. Here we propose ACIS-S observations of the five brightest REFLEX clusters selected to have the most luminous optical emission-line nebulae. We shall confirm the link between emission-line gas and feedback and search for clues to the details of the heating mechanism by correlating the spatial distribution of feedback power with other cluster properties, for example, radio power or merger activity.

R.A. Dec. Target Name Det. Grating Exp.Time
10:23:50.80 -27:15:31.00 RXCJ1023.8-2715 ACIS-S NONE 40
14:59:29.30 -18:11:13.00 RXCJ1459.4-1811 ACIS-S NONE 40
15:24:12.80 -31:54:14.00 RXCJ1524.2-3154 ACIS-S NONE 40
15:58:23.20 -14:10:04.00 RXCJ1558.3-1410 ACIS-S NONE 40

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 09800484

Title: The Active Galaxy Population in a Supercluster at z = 0.7

PI Name: Lori Lubin

Type: GO

We propose to use Chandra and the VLA to map the active galaxy population in a supercluster at z = 0.7. The structure contains seven massive clusters and covers a 11 Mpc x 22 Mpc region. Combined with our extensive supporting data, the Chandra and VLA observations will allow us to measure the properties of X-ray and radio sources over a wide range of local densities, study AGN/starburst host galaxies to determine what causes gas-fueling events, and quantify the effect of large scale structure on the nuclear activity and gas content of galaxies. The proposed observations will be used to constrain how large-scale processes influence galaxy-scale events and are a natural continuation of our approved Cycle 7 & 8 programs to study superclusters and dynamically-active systems at high redshift.

R.A. Dec. Target Name Det. Grating Exp.Time
13:24:42.50 30:16:54.10 SC1324+3016 ACIS-I NONE 50
13:24:49.50 30:51:34.10 SC1324+3051 ACIS-I NONE 50

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 09800576

Title: Chandra/HST Coverage of Compact Galaxy Group Evolution

PI Name: Sarah Gallagher

Type: GO

The first galaxies and their environments differed substantially from those locally, with multiple interactions influencing their histories. Compared to all other nearby environments, present-day compact galaxy groups most closely reproduce conditions in the earlier universe (z~4) when galaxies assembled through hierarchical formation, and galaxy groups combined to form proto-clusters (in dense regions) or massive ellipticals (in the field). We propose senstitive Chandra observations of two nearby compact galaxy groups, HCGs 31 and 59, to complete a sample of six with joint Chandra/HST coverage. In addition to Spitzer mid-IR and Swift UV imaging already in hand, these data will enable a penetrating multiwavelength investigation into this important environment.

R.A. Dec. Target Name Det. Grating Exp.Time
5:01:38.00 -4:15:25.00 HCG 31 ACIS-S NONE 39
11:48:27.00 12:42:40.00 HCG 59 ACIS-S NONE 39

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 09800652

Title: The cluster around the powerful radio-loud quasar 3C186 at z=1.1

PI Name: Aneta Siemiginowska

Type: GO

We request a 200~ksec deep Chandra ACIS-S observation of the high redshift, z=1.1 X-ray cluster associated with the radio-loud quasar 3C~186. We will detect the X-ray cluster emission up to ~0.5~Mpc away from the quasar, study its morphology, and look for an excess temperature as a signature of interaction or a merging process in this high redshift cluster. This cluster is associated with a powerful young quasar (L_bol ~ 10^47 erg/sec) and it gives us a rare opportunity to study an early phase of the interaction between a quasar and its surrounding intracluster medium.

R.A. Dec. Target Name Det. Grating Exp.Time
7:44:17.40 37:53:17.10 3C 186 ACIS-S NONE 40
7:44:17.40 37:53:17.10 3C 186 ACIS-S NONE 160

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 09800732

Title: LoCuSS: Cluster Mass Comparison with Chandra and HST -- Observational Discrepancy or Agreement in the New Millennium?

PI Name: Graham Smith

Type: GO

We propose ACIS-I observations of 15 (Lx>1E44erg/s) galaxy clusters at z=0.2 that we have recently imaged with HST. With existing data on 11 clusters, these new data will form a unique high quality Chandra/HST dataset because the sample of 26 is completely unbiased with respect to their X-ray properties. Within the Local Cluster Substructure Survey (LoCuSS) we propose to use these data to characterise the systematic uncertainties in X-ray and lensing mass measurements within cluster cores - essential ground-work for cluster cosmology experiments which rely on precise cluster mass measurements. We will use mock cluster observations based on the Millennium Simulations to calibrate our observational measurements and new constraints on cluster physics to further improve the simulations.

R.A. Dec. Target Name Det. Grating Exp.Time
0:43:23.10 -20:37:35.00 RXCJ0043.4-2037 ACIS-I NONE 20
1:05:37.20 -24:35:57.00 RXCJ0105.5-2439 ACIS-I NONE 20
1:18:04.50 -27:00:13.00 RXCJ0118.1-2658 ACIS-I NONE 20
2:20:56.80 -38:29:02.00 RXCJ0220.9-3829 ACIS-I NONE 20
2:37:24.60 -26:30:02.00 RXCJ0237.4-2630 ACIS-I NONE 20
3:04:03.60 -36:57:21.00 RXCJ0304.1-3656 ACIS-I NONE 20
3:07:01.10 -28:40:30.00 RXCJ0307.0-2840 ACIS-I NONE 20
3:31:07.60 -21:00:15.00 RXCJ0331.1-2100 ACIS-I NONE 20
3:36:17.30 -40:38:09.00 RXCJ0336.3-4037 ACIS-I NONE 20
4:49:54.70 -44:40:55.00 RXCJ0449.9-4440 ACIS-I NONE 20
5:28:15.40 -29:42:57.00 RXCJ0528.2-2942 ACIS-I NONE 20
5:47:34.20 -31:53:01.00 RXCJ0547.6-3152 ACIS-I NONE 20
6:38:51.20 -53:57:47.00 RXCJ0638.7-5358 ACIS-I NONE 20
10:00:28.90 44:09:10.00 RXCJ1000.5+4409 ACIS-I NONE 20
16:24:16.20 41:15:10.00 Abell 2187 ACIS-I NONE 20

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 09800842

Title: AWM 4: a sharp look at the core of a poor cluster stirred by AGN activity

PI Name: JAN VRTILEK

Type: GO

The central regions of galaxy clusters, frequently occupied by massive elliptical galaxies with strong radio sources interacting with dense, X-ray emitting gas, are among the most interesting and physically active regions in the Universe. We here propose a deep observation of AWM 4, a poor cluster of relaxed appearance without a cooling core but with strong evidence of AGN-driven heating and gas mixing. In this unusual object we will examine the interaction between cluster gas and radio source at high resolution, measure the properties of the gas and constrain the energy budget of the radio source, and clarify the nature of the observed abundance irregularities.

R.A. Dec. Target Name Det. Grating Exp.Time
16:04:56.80 23:55:56.00 AWM 4 ACIS-S NONE 80

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 09800847

Title: BOW SHOCK, ELECTRON-ION EQUILIBRIUM, BREAKUP OF COOL CORE, AND DARK SUBCLUSTER IN ABELL 520

PI Name: Maxim Markevitch

Type: LP

Shock fronts provide a unique tool to study the cluster plasma. Only two have been found, those in 1E0657 and A520. Using a long observation of 1E0657, we have determined, for the first time in any astrophysical plasma, that electron-proton equilibration time is shorter than Coulomb - a tantalizing result but based on one object. A520 gives the only chance to confirm it. Its shock also coincides with an edge of the radio halo, enabling tests of the origin of the intracluster relativistic electrons. A520 also exhibits a remnant of a cool core broken up by merger-induced instabilities, providing data on plasma viscosity. Finally, weak lensing map of A520 reveals an intriguing dark subcluster almost devoid of galaxies. We propose a long observation of this exceptionally interesting cluster.

R.A. Dec. Target Name Det. Grating Exp.Time
4:54:05.40 2:53:35.00 A520_OFF1 ACIS-I NONE 115
4:54:05.40 2:53:35.00 A520_OFF2 ACIS-I NONE 115
4:54:05.40 2:53:35.00 A520_OFF3 ACIS-I NONE 115
4:54:05.40 2:53:35.00 A520_OFF4 ACIS-I NONE 115

Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS

Proposal Number: 09900045

Title: Chandra Observations of the DEEP2 Fields

PI Name: Stephen Murray

Type: GTO

We plan ACIS-I observations of the DEEP2 fields where DEIMOS spectroscopy has measured the galaxy redshifts in the interval 0.7 < z < 1.4 with the primary goal of measuring the environments of different classes of AGN in this redshift interval. We also will study the evolution of AGN in this redshift range, and compare with previous studies at lower redshift.

R.A. Dec. Target Name Det. Grating Exp.Time
2:29:04.40 0:35:26.40 DEEP2 Field 4 ACIS-I NONE 9
2:29:04.40 0:35:26.40 DEEP2 Field 4 ACIS-I NONE 9
2:29:04.40 0:35:26.40 DEEP2 Field 4 ACIS-I NONE 9
2:29:04.40 0:35:26.40 DEEP2 Field 4 ACIS-I NONE 9
2:29:04.40 0:35:26.40 DEEP2 Field 4 ACIS-I NONE 9
2:29:04.40 0:35:26.40 DEEP2 Field 4 ACIS-I NONE 9
2:29:04.40 0:35:26.40 DEEP2 Field 4 ACIS-I NONE 9
2:29:04.40 0:35:26.40 DEEP2 Field 4 ACIS-I NONE 9
2:29:04.40 0:35:26.40 DEEP2 Field 4 ACIS-I NONE 9
2:29:04.40 0:35:26.40 DEEP2 Field 4 ACIS-I NONE 9
2:29:04.40 0:35:26.40 DEEP2 Field 4 ACIS-I NONE 9
2:29:04.40 0:35:26.40 DEEP2 Field 4 ACIS-I NONE 9
16:49:45.80 34:56:31.30 DEEP2 Field 2 ACIS-I NONE 9
16:49:45.80 34:56:31.30 DEEP2 Field 2 ACIS-I NONE 9
16:49:45.80 34:56:31.30 DEEP2 Field 2 ACIS-I NONE 9
16:49:45.80 34:56:31.30 DEEP2 Field 2 ACIS-I NONE 9
16:49:45.80 34:56:31.30 DEEP2 Field 2 ACIS-I NONE 9
16:49:45.80 34:56:31.30 DEEP2 Field 2 ACIS-I NONE 9
16:49:45.80 34:56:31.30 DEEP2 Field 2 ACIS-I NONE 9
16:49:45.80 34:56:31.30 DEEP2 Field 2 ACIS-I NONE 9
16:49:45.80 34:56:31.30 DEEP2 Field 2 ACIS-I NONE 9
16:49:45.80 34:56:31.30 DEEP2 Field 2 ACIS-I NONE 9
16:49:45.80 34:56:31.30 DEEP2 Field 2 ACIS-I NONE 9
16:49:45.80 34:56:31.30 DEEP2 Field 2 ACIS-I NONE 9
23:29:53.80 0:11:34.50 DEEP2 Field 3 ACIS-I NONE 7
23:29:53.80 0:11:34.50 DEEP2 Field 3 ACIS-I NONE 7
23:29:53.80 0:11:34.50 DEEP2 Field 3 ACIS-I NONE 7
23:29:53.80 0:11:34.50 DEEP2 Field 3 ACIS-I NONE 7
23:29:53.80 0:11:34.50 DEEP2 Field 3 ACIS-I NONE 7
23:29:53.80 0:11:34.50 DEEP2 Field 3 ACIS-I NONE 7
23:29:53.80 0:11:34.50 DEEP2 Field 3 ACIS-I NONE 7
23:29:53.80 0:11:34.50 DEEP2 Field 3 ACIS-I NONE 7
23:29:53.80 0:11:34.50 DEEP2 Field 3 ACIS-I NONE 7
23:29:53.80 0:11:34.50 DEEP2 Field 3 ACIS-I NONE 7
23:29:53.80 0:11:34.50 DEEP2 Field 3 ACIS-I NONE 7
23:29:53.80 0:11:34.50 DEEP2 Field 3 ACIS-I NONE 7
23:29:53.80 0:11:34.50 DEEP2 Field 3 ACIS-I NONE 7
23:29:53.80 0:11:34.50 DEEP2 Field 3 ACIS-I NONE 7
23:29:53.80 0:11:34.50 DEEP2 Field 3 ACIS-I NONE 7
23:29:53.80 0:11:34.50 DEEP2 Field 3 ACIS-I NONE 7
23:29:53.80 0:11:34.50 DEEP2 Field 3 ACIS-I NONE 7
23:29:53.80 0:11:34.50 DEEP2 Field 3 ACIS-I NONE 7

Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS

Proposal Number: 09900059

Title: Intermediate Redshift Groups in the XBootes Survey

PI Name: Gordon Garmire

Type: GTO

We propose to observe two intermediate-redshift galaxy groups with Chandra to determine their temperature and X-ray luminosity to r_500. These observations are part of a larger program to observe the 14 brightest groups detected in the XBootes survey. The primary science goals of this project are (1) to exploit the unique multi-wavelength coverage of the XBootes field to investigate the X-ray properties of optically-selected galaxy groups in the 0.15 < z < 0.35 range, and (2) to probe the evolution of group X-ray emission, specifically the Lx/T relation, which is sensitive to non-gravitational effect at these low mass scales. We include a third group which is projected behind a nearby LINER galaxy as an alternate GTO target.

R.A. Dec. Target Name Det. Grating Exp.Time
14:29:16.10 33:59:29.70 CXOXB J142916.1+335929 ACIS-S NONE 25
14:35:08.90 35:03:49.20 CXOXB J143508.8+350349 ACIS-S NONE 45

Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS

Proposal Number: 09900262

Title: Comparing the emission from an unbiased AGN sample with the X-ray background

PI Name: Roland Walter

Type: GO

Although the populations which make up the medium X-ray background are now well understood, little is known at higher energies. The XRB peaks in the middle of the imaging band of INTEGRAL/IBIS, with which we have made the deepest extragalactic hard X-ray survey, reaching 0.5 mCrab. We detect 42 sources, including 24 well known AGN, 7 unidentified sources and 9 with counterparts of unknown X-ray character. Here we request observations to obtain arcsec positions and measure the medium X-ray spectra of the latter 16 sources. The resulting complete sample will allow to study how the medium and hard XRB differ, test population synthesis models for the XRB, including the prevalence of highly absorbed and Compton-thick sources, and begin a study of the evolution of these populations.

R.A. Dec. Target Name Det. Grating Exp.Time
11:35:45.00 6:48:05.00 FIRST J113544.7+064805 ACIS-I NONE 2
11:53:03.00 39:47:04.00 LEDA 37241 ACIS-I NONE 2
12:03:58.00 -3:58:05.00 IGR J12036-0258 ACIS-I NONE 2
12:04:12.00 -7:57:21.00 LEDA 157316 ACIS-I NONE 2
12:06:55.00 -14:46:34.00 LEDA 183026 ACIS-I NONE 2
12:07:12.00 25:35:22.00 IGR J12072+2535 ACIS-I NONE 2
12:07:51.00 -27:34:34.00 IGR J12078-2735 ACIS-I NONE 2
12:13:03.00 7:02:17.00 NGC 4180 ACIS-I NONE 2
12:16:34.00 7:27:33.00 NGC 4235 2 ACIS-I NONE 2
12:20:55.00 -3:19:59.00 IGR J12205-0320 ACIS-I NONE 2
12:26:55.00 4:29:02.00 4C 04.43 ACIS-I NONE 2
12:27:58.00 38:07:29.00 IGR J12280+3807 ACIS-I NONE 2
12:28:26.00 6:38:28.00 RXS J122826.6+063828 ACIS-I NONE 2
12:42:13.00 35:26:25.00 IGR J12422+3526 ACIS-I NONE 2
13:07:44.00 -19:23:48.00 ESO 575-59 ACIS-I NONE 2
13:13:29.00 -11:09:09.00 IGR J13135-1109 ACIS-I NONE 2

Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS

Proposal Number: 09900660

Title: The Evolution of Faint AGN at High Redshift

PI Name: Kirpal Nandra

Type: VLP

We propose a very deep (total 800ks/field) Chandra survey of 0.25 deg2 covering 3 contiguous fields in the Extended Groth Strip, which have exceptional multiwaveband coverage obtained by the AEGIS project. These data, in combination with the CDF North and South, will provide a definitive measurement of the evolution of faint, X-ray selected AGN from z=3-4, where the optical number counts start to drop dramatically. In combination with ultradeep Spitzer data in the same region, this survey will also provide a crucial step forward towards a more complete census of AGN activity and the importance of Compton thick AGN at high z, with associated implications for the total accretion budget of the universe.

R.A. Dec. Target Name Det. Grating Exp.Time
14:18:09.00 52:37:04.40 AEGIS-3 ACIS-I NONE 120
14:18:09.00 52:37:04.40 AEGIS-3 ACIS-I NONE 160
14:18:09.00 52:37:04.40 AEGIS-3 ACIS-I NONE 160
14:18:09.00 52:37:04.40 AEGIS-3 ACIS-I NONE 160
14:19:12.00 52:48:38.20 AEGIS-2 ACIS-I NONE 120
14:19:12.00 52:48:38.20 AEGIS-2 ACIS-I NONE 160
14:19:12.00 52:48:38.20 AEGIS-2 ACIS-I NONE 160
14:19:12.00 52:48:38.20 AEGIS-2 ACIS-I NONE 160
14:20:15.50 53:00:09.70 AEGIS-1 ACIS-I NONE 120
14:20:15.50 53:00:09.70 AEGIS-1 ACIS-I NONE 160
14:20:15.50 53:00:09.70 AEGIS-1 ACIS-I NONE 160
14:20:15.50 53:00:09.70 AEGIS-1 ACIS-I NONE 160

Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS

Proposal Number: 09900679

Title: Detecting the Warm-Hot IGM in Large-Scale Structures

PI Name: Luca Zappacosta

Type: TOO

Galaxy overdensities are good tracers of the dark matter large-scale structures (LSS) and therefore of the diffuse warm-hot phase (WHIM) that should be associated with them. The WHIM in LSS is expected to be denser and much easier to detect than the low density one targeted so far along random lines of sight through absorption line studies (with controversial results). Moreover, searching for WHIM signatures in known LSS is safer and much more robust, since redshift of the absorber is known a priori. This efficient method of investigating WHIM has yet to be fully exploited. We have identified 12 bright blazars in the background of LSS. We propose to probe the WHIM in these structures by identifying the associated absorption lines in the LETG/HRC-S spectrum of these AGNs in outburst phase.

R.A. Dec. Target Name Det. Grating Exp.Time
1:23:08.90 34:20:50.00 1ES 0120+340 HRC-S LETG 100
2:32:48.60 20:17:17.00 1ES 0229+200 HRC-S LETG 100
2:38:38.90 16:37:00.00 1ES 0235+164 HRC-S LETG 100
10:15:04.20 49:26:00.60 1ES 1011+496 HRC-S LETG 100
11:59:31.80 29:14:43.30 3EG J1200+2847 HRC-S LETG 100
12:15:11.00 7:32:04.00 1ES 1212+078 HRC-S LETG 100
12:17:52.00 30:07:00.50 ON 325 HRC-S LETG 100
12:21:21.90 30:10:36.90 H 1219+305 HRC-S LETG 100
12:21:31.70 28:13:58.10 ON 231 HRC-S LETG 100
16:53:52.20 39:45:36.60 Mkn 501 HRC-S LETG 100
22:02:43.30 42:16:40.00 BL Lac HRC-S LETG 100
23:59:07.80 -30:37:41.00 H 2356-309 HRC-S LETG 100

Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS

Proposal Number: 09900712

Title: Identifying the host galaxies for optically dark gamma-ray bursts

PI Name: Andrew Levan

Type: TOO

We propose to use the high spatial resolution capabilities of Chandra to obtain precise positions for a sample of Gamma-ray bursts (GRBs) with no optical afterglows, where the optical light is supresssed relative to the X-ray flux. These bursts are likely to be highly obscured and may have different environments from the optically bright GRBs. Our Chandra observations will (unlike Swift-XRT positions) allow for the unique identification of a host galaxy. To locate these host galaxies we will follow up our Chandra positions with deep optical and IR observations with HST. The ultimate aim is to understand any differences between the host galaxies of optically dark and bright GRBs, and how these affect the use of GRBs as tracers of starformation and galaxy evolution at high redshift.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 Dark-GRB1 ACIS-S NONE 15
0:00:00.00 0:00:00.00 Dark-GRB2 ACIS-S NONE 15
0:00:00.00 0:00:00.00 Dark-GRB3 ACIS-S NONE 15
0:00:00.00 0:00:00.00 Dark-GRB4 ACIS-S NONE 15
0:00:00.00 0:00:00.00 Dark-GRB5 ACIS-S NONE 15

Subject Category: GALACTIC DIFFUSE EMISSION AND SURVEYS

Proposal Number: 09910027

Title: The Great Nebula in Carina: Protoplanetary Disks to Starburst Galaxies (GTO component)

PI Name: Gordon Garmire

Type: GTO

The Great Nebula in Carina is a remarkable and ideal site to study the violent high-mass star formation and feedback that typifies starburst galaxies. We propose to map the Carina star-forming complex with a mosaic of 60-ks ACIS-I pointings as a testbed for understanding recent and ongoing star formation and to probe regions of bright diffuse X-ray emission seen throughout the complex by ROSAT.

R.A. Dec. Target Name Det. Grating Exp.Time
10:42:42.10 -59:46:29.80 Carina Clusters Ptg 1 ACIS-I NONE 60
10:43:59.00 -59:59:25.10 Carina Clusters Ptg 2 ACIS-I NONE 60

Subject Category: GALACTIC DIFFUSE EMISSION AND SURVEYS

Proposal Number: 09910161

Title: The Great Nebula in Carina: Protoplanetary Disks to Starburst Galaxies

PI Name: Leisa Townsley

Type: VLP

The Great Nebula in Carina is a superb site to study the violent massive star formation and feedback that typifies giant HII regions and starburst galaxies. We propose to map the Carina star-forming complex with a mosaic of 20 new 60-ks ACIS-I pointings as a testbed for understanding recent and ongoing star formation and to probe its regions of bright diffuse X-ray emission. We will provide a catalog of multiwavelength properties of ~12,000 X-ray-selected stars. We will explore superbubble confinement, shocks, cloud evaporation, mass-loading of winds, ISM enrichment, and HII region energetics. We will also examine Carina as a surrogate environment for our Solar System's formation, where protoplanetary disks are bathed in harsh winds and radiation from nearby massive stars.

R.A. Dec. Target Name Det. Grating Exp.Time
10:40:34.20 -59:49:30.70 Carina Superbubble Ptg 2 ACIS-I NONE 60
10:41:31.80 -59:35:34.80 Carina Superbubble Ptg 1 ACIS-I NONE 60
10:41:52.10 -60:01:43.70 Carina Superbubble Ptg 3 ACIS-I NONE 60
10:42:34.10 -59:22:44.90 Carina Superbubble Ptg 4 ACIS-I NONE 60
10:43:09.70 -60:14:38.90 Carina South Pillars Ptg 2 ACIS-I NONE 60
10:43:19.70 -59:09:11.30 Carina Clusters Ptg 7 ACIS-I NONE 60
10:44:43.90 -59:21:24.90 Carina Clusters Ptg 4 ACIS-I NONE 60
10:44:46.40 -60:25:40.50 Carina South Pillars Ptg 5 ACIS-I NONE 60
10:45:15.10 -60:12:04.50 Carina South Pillars Ptg 1 ACIS-I NONE 60
10:45:53.70 -59:57:03.90 Carina Clusters Ptg 3 ACIS-I NONE 60
10:46:06.70 -59:31:08.90 Carina Clusters Ptg 6 ACIS-I NONE 60
10:46:55.00 -60:22:01.70 Carina South Pillars Ptg 4 ACIS-I NONE 60
10:46:59.70 -59:46:06.10 Carina East Ptg 1 ACIS-I NONE 60
10:47:12.50 -60:05:50.00 Carina Clusters Ptg 5 ACIS-I NONE 60
10:48:12.40 -59:32:31.00 Carina East Ptg 2 ACIS-I NONE 60
10:48:26.00 -59:58:22.60 Carina East Ptg 3 ACIS-I NONE 60
10:48:47.50 -60:14:27.70 Carina South Pillars Ptg 3 ACIS-I NONE 60
10:49:09.40 -59:45:24.10 Carina East Ptg 4 ACIS-I NONE 60

Subject Category: GALACTIC DIFFUSE EMISSION AND SURVEYS

Proposal Number: 09910246

Title: THE ORIGIN OF THE GALACTIC RIDGE X-RAY EMISSION

PI Name: Mikhail Revnivtsev

Type: LP

We propose a very deep (900 ksec) observation of a carefully selected patch of the Galaxy. This observation will provide the most direct and unambiguous answer to the 30-year-old puzzle of the nature of the Galactic "diffuse" X-ray emission. Recent studies comparing the luminosity function of X-ray sources in the Solar neighborhood with the number-flux distributions toward the Galactic Center and plane strongly suggest that the GRXE can be explained by the integrated emission of millions of faint stellar sources - CVs and coronally active stars. The surface density of them is expected to exceed 1 per 60sq.sec in the proposed observation, in sharp contrast to the expectation in the diffuse model. Clearly, Chandra is the only mission in the foreseeable future which can solve this problem.

R.A. Dec. Target Name Det. Grating Exp.Time
17:51:27.30 -29:35:05.10 1.5deg_window ACIS-I NONE 100
17:51:27.30 -29:35:05.10 1.5deg_window ACIS-I NONE 160
17:51:27.30 -29:35:05.10 1.5deg_window ACIS-I NONE 160
17:51:27.30 -29:35:05.10 1.5deg_window ACIS-I NONE 160
17:51:27.30 -29:35:05.10 1.5deg_window ACIS-I NONE 160
17:51:27.30 -29:35:05.10 1.5deg_window ACIS-I NONE 160

Subject Category: GALACTIC DIFFUSE EMISSION AND SURVEYS

Proposal Number: 09910432

Title: Intermediate-Age Elliptical Galaxies

PI Name: Dong-Woo Kim

Type: GO

We propose to observe intermediate-age elliptical galaxies, with Chandra for a total exposure of 280ks. Existing Chandra observations of a small number of similar galaxies suggest very intriguing age-related effects when compared with those of typical old ellipticals: (1) a flatter luminosity function of LMXBs with a larger number of luminous X-ray sources and (2) an asymmetric spatial distribution of LMXBs. We will confirm these signatures of star formation episodes to provide the first X-ray age-estimator applied to elliptical galaxies and to set strong constraints on theoretical models of X-ray binary formation.

R.A. Dec. Target Name Det. Grating Exp.Time
11:13:16.90 -26:45:20.00 NGC3585 ACIS-S NONE 60
11:51:02.10 -28:48:23.00 NGC3923 ACIS-S NONE 85

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The Chandra X-Ray Center (CXC) is operated for NASA by the Smithsonian Astrophysical Observatory. 60 Garden Street, Cambridge, MA 02138 USA.   Email:   cxchelp@head.cfa.harvard.edu Smithsonian Institution, Copyright © 1998-2017. All rights reserved.