RASS/NVSS ivo://nasa.heasarc/rbscnvss NASA/GSFC HEASARC Bauer, Condon, Thuan, Broderick 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Radio Counterpart By cross-identifying the RASS (ROSAT All-Sky Survey) Bright Source Catalog (RBSC, <a href="https://cdsarc.cds.unistra.fr/ftp/cats/IX/10">CDS Catalog IX/10</a>) with the NRAO VLA Sky Survey (NVSS, <a href="https://cdsarc.cds.unistra.fr/ftp/cats/VIII/65">CDS Catalog VIII/65</a>), the authors have constructed the RBSC-NVSS sample of the brightest X-ray sources (>= 0.1 counts/s ~ 10<sup>-12</sup> erg/cm<sup>2</sup>/s in the 0.1 - 2.4keV band) that are also radio sources (S >= 2.5 mJy at 1.4 GHz) in the 7.8 sr solid angle of extragalactic sky with galactic latitude |b| > 15 degrees and declination > -40 degrees. The sky density of NVSS sources is low enough that they can be reliably identified with RBSC sources having rms positional uncertainties >= 10". The authors used the more accurate radio positions to make reliable X-ray/radio/optical identifications down to the POSS plate limits. They obtained optical spectra for many of the bright identifications lacking published redshifts. The resulting X-ray/radio sample is unique in its size (1557 objects), composition (a mixture of nearly normal galaxies, Seyfert galaxies, quasars, and clusters), and low average redshift [<z>~0.1]. This table was created by the HEASARC in September 2003 based on <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/ApJS/129/547">CDS Catalog J/ApJS/129/547</a>, files table1.dat and table2.dat. This is a service provided by NASA HEASARC . 2000ApJS..129..547B https://heasarc.gsfc.nasa.gov/W3Browse/all/rbscnvss.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=rbscnvss& GET text/xml 180 99999 true 65.78570833 -39.90047222 0.0333333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=rbscnvss GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_rbscnvss&Action=More+Options&Action=Parameter+Search&ConeAdd=1 ROSAT 0.0333333333333333 X-ray public rbscnvss ROSAT All-Sky Survey/NVSS Bright X-Ray Source Sample name RBSC 1RXS Object Designation meta.id;meta.main char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable dec Declination degree pos.eq.dec;meta.main double nullable alt_name Common Name from SIMBAD/NED meta.id char nullable flux RBSC X-ray Flux (erg/s/cm^2) erg/s/cm^2 phot.flux;em.X-ray.soft double nullable flux_20_cm Flux Density at 1.4GHz (mJy) mJy phot.flux.density;em.radio.750-1500MHz double nullable bmag B Magnitude from NED (2000) or USNO-A2 or SIMBAD mag phot.mag;em.opt.B float nullable "__x_ra_dec" System unit vector column double nullable "__y_ra_dec" System unit vector column double nullable "__z_ra_dec" System unit vector column double nullable "__row" System index column char nullable position_flag Flag: O=Optical Position Given, R=NVSS Values Remeasured, F=FIRST Values Used meta.code;pos char nullable lii Galactic Longitude degree pos.galactic.lon double nullable note_flag Flag Indicates a Note Detailed in Documentation meta.code;src char nullable class Browse Object Classification src.class short nullable classification NED or SIMBAD Object Type src.class char nullable redshift_flag Flag Indicates Uncertain Redshift meta.code.qual;src.redshift char nullable spect_type Stellar Spectral Classification src.spType char nullable morphology NED Optical Morphology src.morph.type char nullable ref_redshift Flag Indicates Redshift Reference meta.ref;src.redshift char nullable radio_ext_flag Flag Indicates Extended Radio Emission meta.code;phys.size;em.radio char nullable bii Galactic Latitude degree pos.galactic.lat double nullable redshift Redshift mag src.redshift double nullable id_probability Identification Probability percent stat.likelihood float nullable ref_bmag Flag Indicates Reference for B Magnitude: S=SIMBAD, N=NED, A=USNO-A2 meta.ref;phot.mag;em.opt.B char nullable source_table Flag Indicates Originating Table Number: 1=Galactic, 2=Extragalactic meta.ref;meta.table short nullable