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RBSC-NVSS Sample. I. Radio and Optical Identifications of a Complete Sample of 1500 Bright X-ray Sources | | F. E. Bauer
; J. J. Condon
; T. X. Thuan
; J. J. Broderick
; | | Date: |
1 Mar 2000 | | Journal: | Astrophys.J.Suppl. 129 (2000) 547-562 | | Subject: | astro-ph | | Affiliation: | National Radio Astronomy Observatory, University of Virginia, Virginia Polytechnic Institute and State University | | Abstract: | We cross-identified the ROSAT Bright Source Catalog (RBSC) and the NRAO VLA Sky Survey (NVSS) to construct the RBSC-NVSS sample of the brightest X-ray sources (>= 0.1 counts/s or ~1E-12 ergs/cm/cm/s in the 0.1-2.4 keV band) that are also radio sources (S >= 2.5 mJy at 1.4 GHz) in the 7.8 sr of extragalactic sky with |b| > 15 degrees. and delta > -40 degrees. The sky density of NVSS sources is low enough that they can be reliably identified with RBSC sources having average rms positional uncertainties = 10 arcsec. We used the more accurate radio positions to make reliable X-ray/radio/optical identifications down to the POSS plate limits. We obtained optical spectra for many of the bright identifications lacking published redshifts. The resulting X-ray/radio sample is unique in its size (N ~ 1500 objects), composition (a mixture of nearly normal galaxies, Seyfert galaxies, quasars, and clusters), and low average redshift ( ~ 0.1). | | Source: | arXiv, astro-ph/0003002 | | Services: | Forum | Review | PDF | Favorites | |
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