Browsing FAS Scholarly Articles by Keyword "X-rays: general"
Now showing items 1-14 of 14
-
The Cambridge-Cambridge ROSAT Serendipity Survey -- V. Catalogue and optical identifications
(Oxford University Press (OUP), 1997)We report the results of a medium-depth X-ray survey of 20 ROSAT Position Sensitive Proportional Counter (PSPC) fields. 123 X-ray sources were detected down to a flux limit of S(0.5–2 keV) > 2 × 10−14 erg s−1 cm−2 lying ... -
The Cambridge–Cambridge ROSAT Serendipity Survey – II. Classification of X-ray-luminous Galaxies
(Royal Astronomical Society, 1995)We present the results of an intermediate-resolution (1.5\AA) spectroscopic study of 17 X-ray luminous narrow emission-line galaxies previously identified in the Cambridge-Cambridge {\it ROSAT} Serendipity Survey and the ... -
Chandra Multiwavelength Project X‐Ray Point Source Catalog
(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
(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
(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 Study of an Overdensity of X-Ray Sources around Two Distant (z ~ 0.5) Clusters
(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 Chandra Survey of Extragalactic Sources in the 3cr Catalog: X-Ray Emission From Nuclei, Jets, and Hotspots in the Chandra Archival Observations
(IOP Publishing, 2015)As part of our program to build a complete radio and X-ray database of all Third Cambridge catalog extragalactic radio sources, we present an analysis of 93 sources for which Chandra archival data are available. Most of ... -
Chasing the Identification of ASCA Galactic Objects (ChIcAGO) - An X-ray Survey of Unidentified Sources in the Galactic Plane I: Source Sample and Initial Results
(IOP Publishing, 2014)We present the Chasing the Identification of ASCA Galactic Objects (ChIcAGO) survey, which is designed to identify the unknown X-ray sources discovered during the ASCA Galactic Plane Survey (AGPS). Little is known about ... -
Discovery of a z = 4.93, X-Ray-selected Quasar by the Chandra Multiwavelength Project (ChaMP)
(IOP Publishing, 2002)We present X-ray and optical observations of CXOMP J213945.0-234655, a high-redshift (z = 4.93) quasar discovered through the Chandra Multiwavelength Project (ChaMP). This object is the most distant X-ray-selected quasar ... -
The flare activity of Sagittarius A*
(EDP Sciences, 2006)Context. We report new simultaneous near-infrared/sub-millimeter/X-ray observations of the SgrA* counterpart associated with the massive 3–4×106M⊙ black hole at the Galactic Center. Aims. The main aim is to investigate the ... -
A Full Year's Chandra Exposure on Sloan Digital Sky Survey Quasars From the Chandra Multiwavelength Project
(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 ... -
The Nuclear Spectroscopic Telescope Array (NuSTAR) High-Energy X-Ray Mission
(IOP Publishing, 2013)The Nuclear Spectroscopic Telescope Array (NuSTAR) mission, launched on 2012 June 13, is the first focusing high-energy X-ray telescope in orbit. NuSTAR operates in the band from 3 to 79 keV, extending the sensitivity of ... -
NuSTAR Hard X-ray Survey of the Galactic Center Region I: Hard X-ray Morphology and Spectroscopy of the Diffuse Emission
(IOP Publishing, 2015)We present the first sub-arcminute images of the Galactic Center above 10 keV, obtained with NuSTAR. NuSTAR resolves the hard X-ray source IGR J17456–2901 into non-thermal X-ray filaments, molecular clouds, point sources, ... -
NuSTAR Hard X-ray Survey of the Galactic Center Region II: X-ray Point Sources
(American Astronomical Society, 2016)We present the first survey results of hard X-ray point sources in the Galactic Center (GC) region by NuSTAR. We have discovered 70 hard (3–79 keV) X-ray point sources in a 0.6 deg${}^{2}$ region around Sgr A* with a total ...