Browsing by Author "Tananbaum, Harvey"
Now showing items 1-14 of 14
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ChaMP Serendipitous Galaxy Cluster Survey
Barkhouse, W. A.; Green, P. J.; Vikhlinin, Alexey A.; Kim, D.‐W.; Perley, D.; Cameron, R.; Silverman, J.; Mossman, A.; Burenin, R.; Jannuzi, B. T.; Kim, M.; Smith, M. G.; Smith, R. C.; Tananbaum, Harvey D.; Wilkes, Belinda Jane (IOP Publishing, 2006)We present a survey of serendipitous extended X-ray sources and optical cluster candidates from the Chandra Multiwavelength Project (ChaMP). Our main goal is to make an unbiased comparison of X-ray and optical cluster ... -
Chandra Multiwavelength Project X‐Ray Point Source Catalog
Kim, Minsun; Kim, Dong‐Woo; Wilkes, Belinda Jane; Green, Paul J.; Kim, Eunhyeuk; Anderson, Craig Stephen; Barkhouse, Wayne A.; Evans, Nancy Remage; Ivezi?, ?eljko; Karovska Neily, Margarita; Kashyap, Vinay L.; Lee, Myung Gyoon; Maksym, W. Peter; Mossman, Amy E.; Silverman, John D.; Tananbaum, Harvey D. (IOP Publishing, 2007)We present the Chandra Multiwavelength Project (ChaMP) X-ray point source catalog with ~6800 X-ray sources detected in 149 Chandra observations covering ~10 deg2. The full ChaMP catalog sample is 7 times larger than the ... -
Chandra Multiwavelength Project X‐Ray Point Source Number Counts and the Cosmic X‐Ray Background
Kim, Minsun; Wilkes, Belinda Jane; Kim, Dong‐Woo; Green, Paul J.; Barkhouse, Wayne A.; Lee, Myung Gyoon; Silverman, John D.; Tananbaum, Harvey D. (IOP Publishing, 2007)We present the Chandra Multiwavelength Project (ChaMP) X-ray point source number counts and cosmic X-ray background (CXRB) flux densities in multiple energy bands. From the ChaMP X-ray point source catalog, ~5500 sources ... -
Chandra Multiwavelength Project. I. First X‐Ray Source Catalog
Kim, D.‐W.; Cameron, R. A.; Drake, Jeremy J.; Evans, Nancy Remage; Freeman, P.; Gaetz, Terrance J.; Ghosh, H.; Green, P. J.; Harnden, F. R. Jr.; Karovska Neily, Margarita; Kashyap, Vinay L.; Maksym, W. Peter; Ratzlaff, Peter W; Schlegel, E. M.; Silverman, J. D.; Tananbaum, Harvey D.; Vikhlinin, Alexey A.; Wilkes, Belinda Jane; Grimes, J. P. (IOP Publishing, 2004)The Chandra Multiwavelength Project (ChaMP) is a wide-area (~14 deg2) survey of serendipitous Chandra X-ray sources, aiming to establish fair statistical samples covering a wide range of characteristics (such as absorbed ... -
Chandra Multiwavelength Project. II. First Results of X‐Ray Source Properties
Kim, D.‐W.; Wilkes, Belinda Jane; Green, P. J.; Cameron, R. A.; Drake, Jeremy J.; Evans, Nancy Remage; Freeman, P.; Gaetz, Terrance J.; Ghosh, H.; Harnden, F. R. Jr.; Karovska Neily, Margarita; Kashyap, Vinay L.; Maksym, W. Peter; Ratzlaff, Peter W; Schlegel, E. M.; Silverman, J. D.; Tananbaum, Harvey D.; Vikhlinin, Alexey A. (IOP Publishing, 2004)The Chandra Multiwavelength Project (ChaMP) is a wide-area (~14 deg2) survey of serendipitous Chandra X-ray sources, aiming to establish fair statistical samples covering a wide range of characteristics (such as absorbed ... -
Chandra Multiwavelength Project: Normal Galaxies at Intermediate Redshift
Kim, D.‐W.; Barkhouse, W. A.; Romero‐Colmenero, E.; Green, P. J.; Kim, M.; Mossman, Amy E.; Schlegel, E.; Silverman, J. D.; Aldcroft, Thomas L.; Anderson, C.; Ivezic, Z.; Kashyap, V.; Tananbaum, Harvey D.; Wilkes, Belinda Jane (IOP Publishing, 2006)We have investigated 136 Chandra extragalactic sources, including 93 galaxies with narrow emission lines (NELGs) and 43 with only absorption lines (ALGs). Based on fX/fO, LX, X-ray spectral hardness, and optical emission-line ... -
The Chandra Multiwavelength Project: Optical Follow‐up of Serendipitous Chandra Sources
Green, P. J.; Silverman, J. D.; Cameron, R. A.; Kim, D.‐W.; Wilkes, Belinda Jane; Barkhouse, W. A.; LaCluyze, A.; Morris, D.; Mossman, Amy E.; Ghosh, H.; Grimes, J. P.; Jannuzi, B. T.; Tananbaum, Harvey D.; Aldcroft, Thomas L.; Baldwin, J. A.; Chaffee, F. H.; Dey, A.; Dosaj, A.; Evans, Nancy Remage; Fan, X.; Foltz, C.; Gaetz, Terrance J.; Hooper, E. J.; Kashyap, Vinay L.; Mathur, S.; McGarry, M. B.; Romero‐Colmenero, E.; Smith, M. G.; Smith, P. S.; Smith, R. C.; Torres, Guillermo; Vikhlinin, Alexey A.; Wik, D. R. (IOP Publishing, 2004)We present follow-up optical g', r', and i' imaging and spectroscopy of serendipitous X-ray sources detected in six archival Chandra images included in the Chandra Multiwavelength Project (ChaMP). Of the 486 X-ray sources ... -
Chandra Study of an Overdensity of X-Ray Sources around Two Distant (z ~ 0.5) Clusters
Cappi, M.; Mazzotta, P.; Elvis, Martin S.; Burke, D. J.; Comastri, A.; Fiore, F.; Forman, William R.; Fruscione, Antonella; Green, P.; Harris, D.; Hooper, E. J.; Jones, C.; Kaastra, J. S.; Kellogg, E.; Murray, S.; McNamara, Brian David; Nicastro, F.; Ponman, T. J.; Schlegel, E. M.; Siemiginowska, Aneta L.; Tananbaum, Harvey D.; Vikhlinin, Alexey A.; Virani, S.; Wilkes, Belinda Jane (IOP Publishing, 2001)We present results from a Chandra X-Ray Observatory study of the field X-ray source populations in four different observations: two high-redshift (z ~ 0.5) clusters of galaxies 3C 295 and RX J003033.2+261819; and two ... -
The diversity of soft X-ray spectra in quasars
Elvis, Martin S.; Wilkes, Belinda Jane; Tananbaum, Harvey D. (IOP Publishing, 1985)Soft X-ray spectra for three quasars obtained with the Einstein Imaging Proportional Counter covering the 0.1-4.0 keV band are reported. Power-law fits to these spectra have best-fit energy indices of 1.2 +0.6 or -0.2, for ... -
The Einstein database of IPC x-ray observations of optically selected and radio-selected quasars, 1.
Wilkes, Belinda Jane; Tananbaum, Harvey D.; Worrall, Diana M.; Avni, Yoram; Oey, M. S.; Flanagan, Joan (IOP Publishing, 1994)We present the first volume of the Einstein quasar database. The database includes estimates of the X-ray count rates, fluxes, and luminosities for 514 quasars and Seyfert 1 galaxies observed with the Imaging Proportional ... -
A Full Year's Chandra Exposure on Sloan Digital Sky Survey Quasars From the Chandra Multiwavelength Project
Green, Paul J.; Aldcroft, Thomas L.; Richards, G. T.; Barkhouse, W. A.; Constantin, Ana-Maria; Haggard, D.; Karovska Neily, Margarita; Kim, D.-W.; Kim, M.; Vikhlinin, Alexey A.; Anderson, S. F.; Mossman, Amy E.; Kashyap, Vinay L.; Myers, A. C.; Silverman, J. D.; Wilkes, Belinda Jane; Tananbaum, Harvey D. (IOP Publishing, 2008)We study the spectral energy distributions and evolution of a large sample of optically selected quasars from the Sloan Digital Sky Survey that were observed in 323 Chandra images analyzed by the Chandra Multiwavelength ... -
Highlights and discoveries from the Chandra X-ray Observatory
Tananbaum, Harvey D.; Weisskopf, M C; Tucker, Wallace H.; Wilkes, Belinda Jane; Edmonds, Peter D. (IOP Publishing, 2014)Within 40 years of the detection of the first extrasolar X-ray source in 1962,NASA's Chandra X-ray Observatory has achieved an increase in sensitivity of 10 orders of magnitude, comparable to the gain in going from naked-eye ... -
The Luminosity Function of X‐Ray–selected Active Galactic Nuclei: Evolution of Supermassive Black Holes at High Redshift
Silverman, J. D.; Green, P. J.; Barkhouse, W. A.; Kim, Dong-Woo; Kim, M.; Wilkes, Belinda Jane; Cameron, R. A.; Hasinger, G.; Jannuzi, B. T.; Smith, M. G.; Smith, P. S.; Tananbaum, Harvey D. (IOP Publishing, 2008)We present a measure of the hard (2-8 keV) X-ray luminosity function (XLF) of AGNs up to z ~ 5. At high redshifts, the wide area coverage of the Chandra Multiwavength Project is crucial to detect rare and luminous (LX > ... -
PKS 0483-436 - A high-redshift quasar with strong X-ray absorption
Wilkes, Belinda Jane; Elvis, Martin S.; Fiore, Fabrizio; McDowell, Jonathan Christopher; Tananbaum, Harvey D.; Lawrence, Andrew (IOP Publishing, 1992)The first X-ray spectrum of a high-redshift (z = 2.85) quasar is reported. The Rosat PSPC spectrum of PKS 0438-436, covering 0.3-9 keV in the quasar's rest frame, reveals unexpected absorption of about 1 x 10 exp 22/sq cm, ...