RBSC‐NVSS Sample. I. Radio and Optical Identifications of a Complete Sample of 1556 Bright X‐Ray Sources
| Autor: | James J. Condon, Trinh X. Thuan, J. J. Broderick, F. E. Bauer |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Physics
NRAO VLA Sky Survey Astrophysics::High Energy Astrophysical Phenomena media_common.quotation_subject Astrophysics::Instrumentation and Methods for Astrophysics X-ray Astronomy and Astrophysics Quasar Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Sample (graphics) Galaxy Redshift Space and Planetary Science Sky ROSAT Astrophysics::Galaxy Astrophysics media_common |
| Zdroj: | The Astrophysical Journal Supplement Series. 129:547-562 |
| ISSN: | 1538-4365 0067-0049 |
| DOI: | 10.1086/313425 |
| Popis: | 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). |
| Databáze: | OpenAIRE |
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