J/ApJ/434/54ivo://CDS.VizieR/J/ApJ/434/54doi:10.26093/cds/vizier.14340054CDSThompson R.J.Cordova F.A.1999-12-23T09:41:05Z1999-12-23T10:40:51ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleix-ray-sourcesWe survey the broadband spectral properties of ~500 X-ray-selected active galactic nuclei (AGNs) observed with the Einstein Observatory. Included in this survey are the ~450 AGNs in the Extended Medium Sensitivity Survey of Gioia et al. (1990ApJS...72..567G) and the ~50 AGNs in the Ultrasoft Survey of Cordova et al. (1992ApJS...81..661C). We present a revised version of the latter sample, based on the post publication discovery of a software error in the Einstein Rev-1b processing. We find that the mean spectral index of the AGNs between 0.1 and 0.6keV is softer, and the distribution of indices wider, than previous estimates based on analyses of the X-ray spectra of optically selected AGNs. A subset of these AGNs exhibit flux variability, some on timescales as short as 0.05-days. A correlation between radio and hard X-ray luminosity is confirmed, but the data do not support a correlation between the radio and soft X-ray luminosities, or between radio loudness and soft X-ray spectral slope. Evidence for physically distinct soft and hard X-ray components is found, along with the possibility of a bias in previous optically selected samples toward selection of AGNs with flatter X-ray spectra.1994ApJ...434...54Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/434/54CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/434/54https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/434/54http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/434/54https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/434/54https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/434/54http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/434/54GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/434/54/table1a (Revised Ultrasoft Survey (RUSS) Sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/434/54/table1a?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/434/54/table1a?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/434/54/table1a?GETtext/xml+votable180.050000true3.779353-0.1232050.005555555555555556https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/434/54?format=asciiX-raydefaultJ/ApJ/434/54/table1aRevised Ultrasoft Survey (RUSS) SourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource namemeta.id;meta.maincharprimaryn_Seq[*] Note (1)meta.notecharSeqIPC sequencemeta.idintSRCSource numbermeta.idintRAXX-ray right ascension (1950)pos.eq.raDEXX-ray declination (1950)pos.eq.decRA1950Optical right ascension (1950)pos.eq.ra;meta.mainDE1950Optical declination (1950)pos.eq.dec;meta.mainzRedshiftsrc.redshiftfloatVmagV magnitudemagphot.mag;em.opt.VfloatNHHydrogen column density1e+20cm**-2phys.columnDensityfloatRECOIPC RECO value (2)instr.paramintDitsOff-axis distancearcmininstr.offsetfloatJ/ApJ/434/54/table1bRUSS X-Ray datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource name, as in table1ameta.id;meta.maincharprimaryR1Counts in colour ratio R1phot.count;em.X-rayfloate_R1rms uncertainty on R1stat.errorfloatR2Counts in colour ratio R2 (C3/C2)phot.count;em.X-raydoublee_R2rms uncertainty on R2stat.errordoubleC1Counts ratio at the energy band C1=0.16-0.56keVphot.count;em.X-rayfloate_C1rms uncertainty on C1stat.errorfloatC2Counts ratio at the energy band C2=0.56-1.08keVphot.count;em.X-rayfloate_C2rms uncertainty on C2stat.errorfloatC3Counts ratio at the energy band C3=1.08-3.5keVphot.count;em.X-rayfloate_C3rms uncertainty on C3stat.errorfloatJ/ApJ/434/54/table1cRUSS X-ray luminositiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource name, as in table1ameta.id;meta.maincharprimaryIPCIPC countsct/sphot.count;em.X-rayfloate_IPCrms uncertainty on IPCct/sstat.errorfloatL1s? Soft-component luminosity for the 10eV rest-frame modelsolLumphys.luminosity;em.X-rayfloatnullableL2s? Soft-component luminosity for the 7.85eV observed-frame modelsolLumphys.luminosity;em.X-rayfloatnullablel_LhLimit flag on Lhmeta.code.errorcharLhHard-component luminosity from the observer-frame modelsolLumphys.luminosity;em.X-rayfloatL0.2keV? Monochromatic 0.2keV luminositysolLumphys.luminosity;em.X-rayfloatnullablel_L2.0keVLimit flag on L2.0keVmeta.code.errorcharL2.0keVMonochromatic 2.0keV luminositysolLumphys.luminosity;em.X-rayfloat