J/AJ/115/1253ivo://CDS.VizieR/J/AJ/115/1253doi:10.26093/cds/vizier.51151253CDSPerlman E.S.Padovani P.Giommi P.Sambruna R.Jones L.R.,Tzioumis A.Reynolds J.2023-04-06T16:50:27Z2005-04-18T16:37:19ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frquasarsbl-lacertae-objectssurveysx-ray-sourcesradio-sourcesWe have undertaken a survey, the Deep X-Ray Radio Blazar Survey (DXRBS), of archived, pointed ROSAT Position Sensitive Proportional Counter data for blazars by correlating the ROSAT WGACAT database with several publicly available radio catalogs, restricting our candidate list to serendipitous flat radio spectrum sources ({alpha}_r_<=0.70, where S_{nu}_{prop}{nu}^-{alpha}_r_^). We discuss our survey methods, identification procedure, and first results. Our survey is found to be 95% efficient at finding flat-spectrum radio-loud quasars (FSRQs; 59 of our first 85 identifications) and BL Lacertae objects (22 of our first 85 identifications), a figure that is comparable to or greater than that achieved by other radio and X-ray survey techniques. The identifications presented here show that all previous samples of blazars (even when taken together) did not representatively survey the blazar population, missing critical regions of (LX, LR) parameter space within which large fractions of the blazar population lie. Particularly important is the identification of a large population of FSRQs (>=25% of DXRBS FSRQs) with ratios of X-ray to radio luminosity >=10^-6^({alpha}_rx_<=0.78). In addition, as a result of our greater sensitivity, the DXRBS has already more than doubled the number of FSRQs in complete samples with 5GHz (radio) luminosities between 10^31.5^ and 10^33.5^ergs/s/Hz, and fills in the region of parameter space between X-ray-selected and radio-selected samples of BL Lac objects. The DXRBS is the very first sample to contain statistically significant numbers of blazars at low luminosities, approaching what should be the lower end of the FSRQ luminosity function.1998AJ....115.1253Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/115/1253CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIX/12 : The WGACAT version of ROSAT sources (White+ 1995)VIII/38 : The Parkes-MIT-NRAO 4.85GHz (PMN) Surveys (Griffith+ 1993-1996)VIII/40 : GB6 catalog of radio sources at 4.85GHz (Gregory+ 1996)VIII/15 : Parkes Radio Sources Catalogue (PKSCAT90) (Wright+ 1990)J/MNRAS/323/757 : Deep X-Ray Radio Blazar Survey (DXRBS). II. (Landt+, 2001)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/115/1253https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/115/1253http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/115/1253https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/115/1253https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/115/1253http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/115/1253GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/115/1253/table3 (Positional information)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/115/1253/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/115/1253/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/115/1253/table3?GETtext/xml+votable180.050000true2.808333-36.3430560.0055555555555555566/158 556 1535 1702 4594 5305 6038 6067 6121 6244 9882 16403 16478 16652 16664 16672 16714 16758 17168 17492 18155 18184 18763 19603 20164 20327 20460 20483 20550-20551 20609 20764 20780 21060 21131 21704 21763 22554 22574 22660 22724 22857 22914 22979 23025 23210 23526 24099 24123 26672 26859 26975 27595 28481 28495 28498 32994 33195 33378 33659 33662 33795 33823 34209 34406 34572 34648 35243 35720 36214 36230 36290 36956 37475 38350 39004 39088 39522 40131 43812 43914 46142 464423.313034785154005e-24 3.313034785154005e-24https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/115/1253?format=asciiX-rayRadiodefaultJ/AJ/115/1253/table3Positional informationrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_1WGASimbad column added by the CDSmeta.ref.urlchar1WGAWGACAT namemeta.id;meta.maincharprimaryNNumber of results for this blazar (in tables 3 and 4)meta.ref.urlintnullableRAJ2000WGACAT right ascension (J2000)pos.eq.ra;meta.mainDEJ2000WGACAT declination (J2000)pos.eq.dec;meta.mainoWGAOffset from field center in X-rayarcsecpos.angDistancefloateWGAWGACAT error (1)arcsecstat.errorintRA1PMN or GB6 right ascension (J2000)pos.eq.raDE1PMN or GB6 declination (J2000)pos.eq.decRA2Optical Counterpart right ascension (J2000)pos.eq.raDE2Optical Counterpart declination (J2000)pos.eq.decSourceSource (2)meta.idcharOffsetAbsolute offset (X-O) valuearcsecpos.angDistancefloateCountCounterpart errorarcsecstat.errorintErrorCumulative errorarcsecstat.errorfloato/eRatio of Offset to Errorstat.errorfloatWGAdatDisplay the data from WGA Catalog (IX/31)meta.ref.urlcharJ/AJ/115/1253/table4Newly identified objectsSI? Radio spectral indexspect.indexfloatnullablel_BmagLimit flag on Bmagmeta.code.errorcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_1WGASimbad column added by the CDSmeta.ref.urlchar1WGAWGACAT namemeta.id;meta.maincharprimaryNNumber of results for this blazar (in tables 3 and 4)meta.ref.urlintnullableCrateROSAT count ratect/sphot.count;em.X-rayfloatF(0.1-2.0)0.1-2.0keV fluxmW.m**-2phot.flux;em.X-raydoubleF1keVFlux density at 1keVuJyphot.flux;em.X-rayfloatlog(FX/FR)? X-flux to radio-flux ratiophot.flux;arith.ratiofloatnullableF6cm? Flux density at 6cmmJyphot.flux.density;em.radio.3-6GHzintnullableBmag? B magnitudemagphot.mag;em.opt.Bfloatnullablel_RmagLimit flag on Rmagmeta.code.errorcharRmag? R magnitudemagphot.mag;em.opt.RfloatnullableClassClassification (1)src.classcharz? Redsifhtsrc.redshift;pos.heliocentricfloatnullableu_z[?] Uncertainty flag on zmeta.code.error;src.redshiftcharCatOther catalogs (2)meta.id;meta.datasetcharJ/AJ/115/1253/table6Previously identified blazarsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource namemeta.id;meta.maincharCrateROSAT count ratect/sphot.count;em.X-rayfloatF(0.1-2.0)0.1-2.0keV fluxmW.m**-2phot.flux;em.X-raydoubleF1keVFlux density at 1keVuJyphot.flux;em.X-rayfloatlog(FX/FR)X-flux to radio-flux ratiophot.flux;arith.ratiofloatF6cmFlux density at 6cmmJyphot.flux.density;em.radio.3-6GHzintSIRadio spectral indexspect.indexfloatVmag? V magnitudemagphot.mag;em.opt.VfloatnullableClassClassification (1)src.classcharl_zLimit flag on zmeta.code.error;src.redshiftcharz? Redsifhtsrc.redshift;pos.heliocentricfloatnullableu_z[?] Uncertainty flag on zmeta.code.error;src.redshiftcharJ/AJ/115/1253/notesIndividual notesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint1WGAWGACAT name (repeated of more than 1 line)meta.id;meta.maincharNoteText of the notemeta.notechar