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Division of Physics, Mathematics and Astronomy MS 220-47, California Institute of Technology, Pasadena, CA 91107 rutledge@srl.caltech.edu, rb@astro.caltech.edu, prince@srl.caltech.edu
Infrared Processing and Analysis Center, Caltech/JPL, Pasadena, CA 91125, cjl@ipac.caltech.edu
These four tables make up the appendix for the paper: ``XID: Cross-Identifications of ROSAT/Bright Source Catalog Sources with USNO-A2 Optical Point Sources''. The production and meaning of all values in this table are given in that work, and are briefly described here:
Table Content From Sec. N_Obj
{tab:98} greater 98\% 3.1 2705
{tab:90} 90< pid< 98 % 3.1 2787
{tab:50} 50< pid< 90 % 3.1 5809
{tab:pair} Optical Pairs pid> 50% 3.2 472
The columns of each table (except Table~\ref{tab:pair}, see below) have the
following meanings:
column & Heading & Description
1 & 1RXS & The ROSAT/BSC Name for the X-ray source
2 & PSPC c/s ($\sigma$) & RASS/BSC Catalog X-ray countrate, and 1$\sigma$ uncertainty
3 & \pid & calculated fractional probability of unique association between the X-ray and USNO objects
4 & $B_{\rm USNO A2}$ & the \usno\ $B$ magnitude
5 & USNO A2 & the \usno\ source name/position (hhmmss.ss+/-ddmmss.s)
6 & SIMBAD crossID & list of all objects $<$10\arcsec from the \usno\ position
7 & Type & SIMBAD object population
8 & Class & Classification of the SIMBAD object
9 & $B$ : $V$ & SIMBAD $B$ and $V$ magnitudes
10 & Comments & Comment code
In Table~\ref{tab:pair}, the magnitudes and \usno\
designations of the two sources are separated by a backslash. Please
be aware of the points of caution regarding the ``Optical Pairs''
counterparts. In column 7, the source types are often abbreviated
according to the following scheme, which closely follows the source
types used by SIMBAD:
Abbrev. Meaning Abbrev. Meaning Abbrev. Meaning
$*$ Star HiPM* High Proper-motion Star SN SuperNova
$**$ Stellar binary HMXB High Mass X-ray Binary Spec. Bin. Spectroscopic Binary
$*$iC Star in Cluster IR Infra-red object Sy1 Seyfert 1
$**$mul multiple stellar system Glob. Clust. Globular Cluster Sy Seyfert 2
$*$Neb Star in Nebula Gal. Galaxy TT T-Tauri type star
Clust. Cluster GiG Galaxy in Group of Galaxies UV Ultra-violet emission source
CV Cataclysmic Variable LMXB Low Mass X-ray Binary V* Variable Star
Ceph. Cephied Variable LSBG Low Surface Brightness Galaxy WD White Dwarf
DN Dwarf Nova PN Planetary Nebula WR * Wolf-Rayet Star
Ecl.Bin. Eclipsing Binary (and type)Rad. Radio source X X-ray source
Em. * Emission line star Rot. Var. * Rotationally Variable Star YSO Young Stellar Object
Additional lines are given for each SIMBAD object within 10\arcsec\ of
the USNO counterpart (20 \arcsec for the optical pairs) . Note that
the counterpart for which the \pid\ applies is the \usno\ counterpart;
the SIMBAD identifications are listed to provide {\it possible}
identifications of this source. The SIMBAD $B$ and $V$ magnitudes
provide a point of comparison with the \usno\ $B$ magnitude which may
help in identifying the \usno\ object, however the \usno\ $B$
magnitudes are subject to certain systematic errors, and should be
viewed with caution.
Column 10 holds comment codes of which, at present, there is only one: P=SIMBAD
object has been previously identified as this RASS/BSC source.
tabA1_98p.tex
------------
Catalog of RASS/BSC -- UNSO Associations,
with pid≥98%, and SIMBAD Sources within 10arcsec {tab:98}}
1RXS PSPC c/s (sigma$) pid B_USNO A2 USNO A2 SIMBAD_crossID Type Class $B$ : V$ Comments