CGRABS ivo://nasa.heasarc/cgrabs NASA/GSFC HEASARC Healey et al. 2026-10-02 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source The authors have constructed a uniform all-sky survey of bright blazars, selected primarily by their flat radio spectra, that is designed to provide a large catalog of likely gamma-ray active galactic nuclei (AGNs). The defined sample, the Candidate Gamma-Ray Blazar Survey (CGRaBS) source catalog, has 1625 targets with radio and X-ray properties similar to those of the EGRET blazars, spread uniformly across the |b| > 10 degrees sky. They also report progress toward optical characterization of the sample; of objects with known red magnitude R < 23, 85% have been classified and 81% have measured redshifts. One goal of this program is to focus attention on the most interesting (e.g., high-redshift, high-luminosity, etc.) sources for intensive multi-wavelength study during the observations by the Large Area Telescope (LAT) on the Gamma-Ray Large-Area Space Telescope (GLAST) satellite observatory. This table was created by the HEASARC in April 2008 based on an electronic version of Table 2 of the reference paper obtained from the electronic ApJS web site. This is a service provided by NASA HEASARC . 2008ApJS..175...97H https://heasarc.gsfc.nasa.gov/W3Browse/all/cgrabs.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=cgrabs& GET text/xml 180 99999 true 293.60808333 -87.19991667 0.0833333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=cgrabs GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_cgrabs&Action=More+Options&Action=Parameter+Search&ConeAdd=1 RADIO CATALOG 0.0833333333333333 Radio public cgrabs Candidate Gamma-Ray Blazar Survey Source Catalog name Source 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 flux_3p6_cm Flux Density at 8.4 GHz mJy phot.flux.density;em.radio.6-12GHz double nullable rmag_limit Limit Flag for R Magnitude meta.code;phot.mag;em.opt.R char nullable rmag R Band magnitude mag phot.mag;em.opt.R double nullable source_type Object Classification src.class char nullable redshift Redshift src.redshift double nullable figure_of_merit_flag Flag Indicates Source Would Not Satisfy FoM Cutoff If X-Ray Flux Were Ignored meta.code;stat.param char nullable figure_of_merit Figure of Merit stat.param double nullable lii Galactic Longitude degree pos.galactic.lon double nullable rmag_extinction Extinction in the R Band mag phys.absorption;phot.mag;em.opt.R double nullable class Browse Object Classification src.class short nullable bii Galactic Latitude degree pos.galactic.lat double nullable redshift_flag Flag [:] Indicates Uncertainty in Redshift meta.code;src.redshift char nullable ref_redshift Flag Indicates Reference for Redshift meta.ref;src.redshift char 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