RBSC-NVSS SAMPLE. I. RADIO AND OPTICAL IDENTIFICATIONS

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RBSC-NVSS SAMPLE. I. RADIO AND OPTICAL IDENTIFICATIONS [ CATS home ] [ Back to CATS list ] [ ftp ]

2000ApJS..........Bauer+ (in press)

astro-ph/0003002

RBSC-NVSS SAMPLE. I. RADIO AND OPTICAL IDENTIFICATIONS OF A COMPLETE SAMPLE OF 1500 BRIGHT X-RAY SOURCES

Franz E. Bauer E-mail: fbauer@nrao.edu

J.J. Condon E-mail: jcondon@nrao.edu

Trinh X. Thuan E-mail: txt@virginia.edu

J.J. Broderick E-mail: jjb@vt.edu

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^{-1} ~= 10^{-12} ergs cm^-2s^-1 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| > 15deg and DEC > -40deg. The sky density of NVSS sources is low enough that they can be reliably identified with RBSC sources having rms positional uncertainties ~10''. 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 ( z ~ 0.1).

keywords: catalogs --- radio continuum: general --- surveys ---
X-rays: general

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The remaining 1512 objects are extragalactic and listed in Table2.

Column 1. ROSAT RBSC name, format 1RXS JHHMMSS.S+DDMMSS.
Column 2. NED Common Name, if available.
Column 3. ROSAT BSC X-ray Flux.
Column 4. NVSS position, unless noted otherwise.
Column 5. NVSS 1.4 GHz Flux density.
Column 6. Identification Probability P(R,V)
(Equation. Identifications with a '-' have been
accepted despite having a low probability.
Column 7. B magnitude from NED, if available;
otherwise from USNO as indicated by '()'. Identifications with a
'-' denote empty fields.
Column 8. Redshift, if known. From NED unless noted otherwise.
Identifications with a '-' represent objects for which
spectra was taken but a redshift could not be determined. We
have obtained optical spectra with
the KPNO 2.1 m telescope for many of the bright identifications
which did not possess published redshifts. The detailed description
of these spectra will be given in a subsequent paper
(Bauer, Thuan, Condon 2000).
Column 9. NED optical morphology, if available.
Column 10. Spectral classification, if known. From NED unless noted otherwise
in redshift column.
------------------------------------------------------------------------
AGN Active galactic nuclei, type unknown
Blazar BL Lacertae type object with variable emission line spectra
BLLAC BL Lacertae type object
BLRG Broad-line radio galaxy
cD Central dominant galaxy, Early-type stellar absorption continuum
Early Early-type stellar absorption continuum
HII Starburst galaxy with narrow emission-line spectra similar
to HII regions
HPQ High polarization QSO
LINER Low ionization narrow emission-line region
LPQ Low polarization QSO
QSO Quasi-stellar object
Sy1-2 Seyfert galaxy, emission-line spectra classified from type 1 to 2

------------------------------------------------------------------
Notes:
O - Optical position given: because identification is more than 3sigma
from radio position or there are multiple optical candidates
R - NVSS position and/or flux density remeasured.
F - High resolution position and flux density taken from the FIRST 1.4 GHz
survey (White et al. 1997).
S - Extended radio emission - central point source and single lobe;
using central point source position and total emission.
E - Extended radio emission.
D - Extended radio emission - double; using centroid and total emission.
T - Extended radio emission - triple; using central source position and
total emission.
1 - Derived from optical spectra obtained with KPNO 2.1m telescope during
1997$-$1999. A dash (-) indicates there is not enough spectral
information to classify
2 - From Brinkmann et al. 2000

transform from TeX ver. by Trushkin (for CATS database) 05/03/2000
----------------------------------------------------------------------------------------------------------------------------------------------------
ROSAT BSC NED S_x Position S_1.4 GHz ID |------------------ NED ---------------------|
1RXS name Common name ergs s^-1cm^-2 RA J2000 DEC mJy P m_B Redshift Morphology Sp. Class.
----------------------------------------------------------------------------------------------------------------------------------------------------
J000000.0-392902 ESP 21616 1.61e-12 23 59 56.35 -39 28 46.3 O 3.3 0.25 19.0
ESP 21615 23 59 56.68 -39 28 37.2 O 3.3 0.34 18.9
J000007.0+081653 UGC 12890 5.98e-12 00 00 06.98 +08 16 46.3 83.5 1.00 16.0 0.0387 1 Early
J000226.6+032105 NGC 7811 5.84e-12 00 02 25.94 +03 21 02.7 5.8 1.00 15.1 0.0255 cIm? Sy1