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V/138 A catalogue of cross-matched radio/infrared/X-ray sources (Combi+, 2011)
The following files can be converted to FITS (extension .fit or fit.gz)
tab_nvss.dat tab_mgps.dat tab_sums.dat tab_refs.dat
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drwxr-xr-x 2 cats archive 143 Nov 14 2012 v00 Beginning of ReadMe :V/138 A catalogue of cross-matched radio/infrared/X-ray sources (Combi+, 2011)
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A systematic cross-search for radio/infrared counterparts of XMM- Newton sources
Combi J.A., Albacete-Colombo J.F., Pellizza L., Lopez-Santiago J.,
Romero G.E., Marti J., Munoz-Arjonilla A.J., Sanchez-Ayaso E.,
Luque-Escamilla P.L., Sanchez-Sutil J.R.
<Astrophis. and Space Science, 331, 53 (2011)>
=2011Ap&SS.331...53C
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ADC_Keywords: X-ray sources ; Radio sources ; Infrared sources ;
Cross identifications
Keywords: Catalogs, Methods: statistical ; X-rays: general ;
Radio continuum: general ; Infrared: general ; Surveys
Abstract:
We present a catalog of cross-correlated radio, infrared and X-ray
sources using a very restrictive selection criteria with an IDL-based
code developed by us. The significance of the observed coincidences
was evaluated through Monte Carlo simulations of synthetic sources
following a well-tested protocol. We found 3320 coincident radio/X-ray
sources with a high statistical significance characterized by the sum
of error-weighted coordinate differences. For 997 of them, 2MASS
counterparts were found. The percentage of chance coincidences is less
than 1%. X-ray hardness ratios of well-known populations of objects
were used to provide a crude representation of their X-ray spectrum
and to make a preliminary diagnosis of the possible nature of
unidentified X-ray sources. The results support the fact that the
X-ray sky is largely dominated by Active Galactic Nuclei at high
galactic latitudes (|b|>=10deg). At low galactic latitudes
(|b|<=10deg) most of unidentified X-ray sources ( 94%) lie at
|b|>=2deg. This result suggests that most of the unidentified sources
found toward the Milky Way plane are galactic objects. Well-known and
unidentified sources were classified in different tables with their
corresponding radio/infrared and X-ray properties. These tables are
intended as a useful tool for researchers interested in particular
identifications.
Description:
This is a complete version of the tables created for the manuscript,
that are not available at the journal website. These tables contain
radio, infrared and X-ray data for the 3320 sources in common in the
2XMM catalog and one of the following radio catalogs: NVSS, SUMSS,
and MGPS. A flag with the object types is included in this new version.