Chandra X-Ray Observatory
	(CXC)

Accepted Cycle 2 Large Project Proposals

Proposal NumberSubject CategoryPI NameTypeTime
(Ks)
Title
02200644NORMAL STARS AND WDAyresLP380TORTURED CORONAE IN THE RAPID BRAKING ZONE
02500880SN, SNR AND ISOLATED NSHESTERLP200COORDINATED CHANDRA/HST OBSERVATIONS OF THE CRAB NEBULA
02600758NORMAL GALAXIESPrestwichLP547THE X-RAY POINT SOURCE POPULATION IN SPIRAL GALAXIES
02700294ACTIVE GALAXIES AND QUASARSGeorgeLP850DETERMINING THE NATURE OF THE VARIABLE ABSORPTION IN NGC 3783 WITH CHANDRA/HST
02700728ACTIVE GALAXIES AND QUASARSMathurLP500FINDING THE BARYONS IN THE LOW REDSHIFT UNIVERSE.
02800845CLUSTERS OF GALAXIESStanfordLP375A COMPLETE X-RAY CLUSTER SAMPLE AT Z > 0.8
02900196EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYSBrandtLP495THE CHANDRA DEEP SURVEY OF THE HUBBLE DEEP FIELD NORTH (HDF-N) AREA
02900378EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYSGIACCONILP500AN ULTRADEEP SURVEY IN THE CHANDRA DEEP FIELD SOUTH
02910585GALACTIC DIFFUSE EMISSION AND SURVEYSWangLP360CHANDRA SURVEY OF THE GALACTIC RIDGE AROUND THE MILKY WAY CENTER

Subject Category: NORMAL STARS AND WD

Proposal Number: 02200644

Title: TORTURED CORONAE IN THE RAPID BRAKING ZONE

PI Name: Thomas Ayres

Deep HETGS exposures of four key G0-G5 giants will address fundamental questions concerning their hot magnetized coronae by determining temperatures and densities, probing chemical fractionation processes, and exploring plasma dynamics. The giants lie in or near the "Rapid Braking Zone" where moderate mass stars undergo a radical transformation of their outer atmospheres, perhaps as a relic magnetosphere is disrupted by the onset of a solar-like dynamo. ACIS-I CCD spectra of five G/K supergiants will explore the even more extreme extension of the RBZ to higher masses: where hot coronae mix freely with cool stellar winds. These are ideal targets to exploit the experience gained in the Emission Line Project studies of the active binaries Capella and HR 1099.

R.A. Dec. Target Name Det. Grating Exp.Time
23:49:40.80+36:25:31.00HD 223460ACIS-SHETG100
10:46:46.10-49:25:12.00HD 93497ACIS-SHETG80
12:51:41.80+27:32:26.00HD 111812ACIS-SHETG140

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 02500880

Title: COORDINATED CHANDRA/HST OBSERVATIONS OF THE CRAB NEBULA

PI Name: JEFF HESTER

Recent monitoring of the Crab Nebula with the HST and Chandra sheds new light on both the structure and dynamics of the region into which the wind from the Crab pulsar flows. Bright X-rays predominately originate in regions which contain sharp and highly dynamic structure at visible wavelengths, reflecting the short synchrotron lifetime of the most energetic particles in the nebula. We now have a unique opportunity for an intensive coordinated optical/X-ray campaign to study this dynamic structure. We have an approved and scheduled HST program to monitor the Crab at 11-day intervals during 8 months in the 2000-01 observing season. We request sixteen 25 ks observations with the Chandra ACIS to monitor the X-ray structure and spectrum of Crab during the HST campaign.

R.A. Dec. Target Name Det. Grating Exp.Time
05:34:31.60+22:00:56.40CRAB NEBULAACIS-SNONE200

Subject Category: NORMAL GALAXIES

Proposal Number: 02600758

Title: THE X-RAY POINT SOURCE POPULATION IN SPIRAL GALAXIES

PI Name: Andrea Prestwich

Emission from discrete sources dominates the X-ray luminosity in spiral galaxies. We propose to survey a sample of nearby spiral galaxies to characterise the properties of the discrete sources. We have chosen nearby, face-on galaxies which span the Hubble sequence for spirals. Chandra's superb imaging capability will allow us to detect sources down to a luminosity of 4e36 erg s^-1 in the ROSAT band. We aim to classify souces as accretion powered binaries (Low or High Mass) or supernova remnants. Our survey will go more than a factor of 20 deeper than the deepest ROSAT pointings of the same galaxies. This data will enable us to look for trends in the characteristics of discrete sources with Hubble type, metallicity and stellar population.

R.A. Dec. Target Name Det. Grating Exp.Time
03:17:18.30-41:06:28.00NGC 1291ACIS-SNONE35
08:53:32.80+51:18:50.00NGC 2681ACIS-SNONE170
12:22:32.00+29:53:43.00NGC 4314ACIS-SNONE36
13:37:00.80-29:51:59.00NGC 5236ACIS-SNONE10
01:36:41.70+15:46:59.00NGC 628ACIS-SNONE94
14:03:12.50+54:20:55.00NGC 5457ACIS-SNONE10
23:34:27.40-36:06:05.00IC 5332ACIS-SNONE112
00:52:04.60+47:33:04.00NGC 278ACIS-SNONE80

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 02700294

Title: DETERMINING THE NATURE OF THE VARIABLE ABSORPTION IN NGC 3783 WITH CHANDRA/HST

PI Name: Ian George

We propose 5 Chandra/HETG observations of NGC 3783, each simultaneous with HST/STIS observations already approved. The observations will allow the accurate determination of the variable continuum, absorption & emission line properties known to exist in this Seyfert, and constitute the most comprehensive study possible of the nature, origin and evolution of the X-ray & UV absorbers in an AGN. Such absorbers constitute a major component of the circumnuclear gas in AGN, and only the HETG has the resolution to make these measurements. It is vital to perform such a detailed study early in the mission to facilitate the correct interpretation of the Chandra & XMM observations of this and other AGN. We also ask the TAC to approve a restructuring of Chandra time already awarded to this study.

R.A. Dec. Target Name Det. Grating Exp.Time
11:39:02.40-37:44:24.00NGC 3783ACIS-SHETG710

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 02700728

Title: FINDING THE BARYONS IN THE LOW REDSHIFT UNIVERSE.

PI Name: Smita Mathur

Recent estimates of the primordial deuterium abundance, combined with the theory of big bang nucleosynthesis (BBN), imply a baryon density parameter $\Omega_b \approx 0.04 h_{70}^{-2}$. The main reservoir of low redshift baryons is still ``missing''. All the observed stellar and gaseous components add up to only $\Omega_b \approx 0.004h_{70}^{-1}$, a factor of ten below the BBN abundance. Hydrodynamic cosmological simulations predict that a large fraction of the low redshift baryons should reside in a hot diffuse intergalactic medium (IGM). We propose to exploit the excellent spectral resolution of Chandra gratings to probe the low redshift IGM with sensitive X-ray spectroscopy. We expect to detect the main reservoir of low redshift baryons with observations of OVII absorption lines.

R.A. Dec. Target Name Det. Grating Exp.Time
18:21:57.30+64:20:36.40H1821+643ACIS-SLETG500

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 02800845

Title: A COMPLETE X-RAY CLUSTER SAMPLE AT Z > 0.8

PI Name: Spencer Stanford

We propose to observe three X-ray selected clusters of galaxies from the RDCS, one at z = 1.1 and two at z ~ 0.8. In conjunction with other data already being obtained by Chandra and XMM, we would then have luminosity and temperature measurements for a complete sample of 8 clusters at z > 0.8. We will produce the first temperature function at these high redshifts. Using Chandra's high angular resolution, we can minimize the contamination from point sources, a serious problem at faint flux limits, as well as study the spatial properties of the intra-cluster medium. With this combination of temperatures, luminosities, and spatial profiles, we will both probe the cluster mass function of the universe at high redshift and study the thermal history of the intra-cluster medium.

R.A. Dec. Target Name Det. Grating Exp.Time
09:10:43.80+54:22:04.00RX J0910+5422ACIS-INONE190
13:17:21.40+29:11:25.00RX J1317.4+2911ACIS-INONE115
13:50:46.10+60:07:09.00RX J1350.0+6007ACIS-INONE60

Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS

Proposal Number: 02900196

Title: THE CHANDRA DEEP SURVEY OF THE HUBBLE DEEP FIELD NORTH (HDF-N) AREA

PI Name: William Brandt

We propose to extend the Chandra X-ray survey of the HDF-N and its vicinity with a 475 ks exposure; this will give 1 Ms of total coverage on this field and will fulfill one of Chandra's central design goals. We should remain photon limited to 1 Ms and will probe the X-ray Universe more than four times deeper than any observation to date. We should resolve essentially all of the X-ray background from 0.5-8 keV and will study obscured and high-redshift active galaxies, advection dominated sources, starbursts, X-ray binaries, clusters and groups, and diffuse X-ray emission. The HDF-N field is an ideal one for multiwavelength follow-up studies due to the enormous database already in place. All data are to be placed in the public archive immediately and we will request no GO science funding.

R.A. Dec. Target Name Det. Grating Exp.Time
12:36:49.40+62:12:58.00HDF-NACIS-INONE475

Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS

Proposal Number: 02900378

Title: AN ULTRADEEP SURVEY IN THE CHANDRA DEEP FIELD SOUTH

PI Name: RICCARDO GIACCONI

We propose to exploit the unique combination of angular resolution, sensitivity and field-of-view of the Chandra ACIS imager to perform the deepest X-ray survey ever in the well-studied "Chandra Deep Field South" (CDFS). With a total integration time of 1.5 Msec (request for this AO: 1 Msec) we reach a 0.5-2 keV flux limit of 2E-17 cgs. We aim to detect >500 sources, i.e. AGN to z=10, clusters to z=3 and starburst galaxies to z~1. Simulations based on the existing 130 ksec observation in the CDFS and realistic source counts and correlation function models show, that Chandra exposures will not be background or confusion limited up to 3Msec. We propose to make the Chandra data public immediately.

R.A. Dec. Target Name Det. Grating Exp.Time
03:32:27.50-27:48:23.00CDFSACIS-INONE500

Subject Category: GALACTIC DIFFUSE EMISSION AND SURVEYS

Proposal Number: 02910585

Title: CHANDRA SURVEY OF THE GALACTIC RIDGE AROUND THE MILKY WAY CENTER

PI Name: Q. Daniel Wang

We propose an X-ray survey of a 2.4x0.7 square deg field around the Galactic center, using a set of Chandra ACIS pointings. With the unprecedented spatial and spectral resolutions as well as the broad energy coverage, this survey will provide an invaluable database for studying X-ray pulsars, binaries, supernova remnants, and superbubbles as well as many unique features observed in the field. The resultant exquisite X-ray images, complemented by an existing large-scale ROSAT PSPC mapping in soft X-ray, will allow for direct comparison with similar maps in radio and infrared. In particular, the survey will provide an excellent opportunity to determine the origin of the well-known Galactic ridge X-ray emission.

R.A. Dec. Target Name Det. Grating Exp.Time
17:43:05.00-29:50:10.00GCS 1ACIS-INONE12
17:44:06.20-29:28:35.80GCS 3ACIS-INONE12
17:44:36.60-29:17:47.00GCS 4ACIS-INONE12
17:45:07.00-29:06:59.00GCS 5ACIS-INONE12
17:46:07.30-28:45:21.00GCS 6ACIS-INONE12
17:46:37.40-28:34:31.00GCS 7ACIS-INONE12
17:47:37.10-28:12:50.00GCS 8ACIS-INONE12
17:48:06.80-28:01:59.00GCS 9ACIS-INONE12
17:44:25.30-29:46:01.00GCS 11ACIS-INONE12
17:44:55.80-29:35:13.00GCS 12ACIS-INONE12
17:45:26.20-29:24:24.00GCS 13ACIS-INONE12
17:45:56.50-29:13:35.00GCS 14ACIS-INONE12
17:46:26.70-29:02:45.00GCS 15ACIS-INONE12
17:47:26.70-28:41:05.00GCS 16ACIS-INONE12
17:47:56.60-28:30:14.00GCS 17ACIS-INONE12
17:48:26.40-28:19:23.00GCS 18ACIS-INONE12
17:48:56.10-28:08:31.00GCS 19ACIS-INONE12
17:42:15.30-29:43:30.00GCS 20ACIS-INONE12
17:42:46.00-29:32:43.00GCS 21ACIS-INONE12
17:43:16.60-29:21:56.00GCS 22ACIS-INONE12
17:44:17.50-29:00:21.00GCS 24ACIS-INONE12
17:44:47.80-28:49:33.00GCS 25ACIS-INONE12
17:45:18.00-28:38:45.00GCS 26ACIS-INONE12
17:45:48.10-28:27:55.00GCS 27ACIS-INONE12
17:46:18.10-28:17:06.00GCS 28ACIS-INONE12
17:46:47.90-28:06:16.00GCS 29ACIS-INONE12
17:47:17.70-27:55:26.00GCS 30ACIS-INONE12
17:43:35.60-29:39:23.30GCS 2ACIS-INONE12
17:43:54.70-29:56:49.00GCS 10ACIS-INONE12
17:43:47.10-29:11:09.00GCS 23ACIS-INONE12
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