J/MNRAS/375/989ivo://CDS.VizieR/J/MNRAS/375/989doi:10.26093/cds/vizier.73750989CDSWold M.Brotherton M.S.Shang Z.2024-07-04T20:17:58Z2007-11-05T14:05:33ZCDS support team

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

cds-question@unistra.frquasarsredshiftedIn order to investigate the dependence of quasar variability on fundamental physical parameters like black hole mass, we have matched quasars from the Quasar Equatorial Survey Team, Phase 1 (QUEST1) variability survey with broad-lined objects from the Sloan Digital Sky Survey. The matched sample contains 104 quasars, and the Sloan spectra are used to estimate black hole masses and bolometric luminosities. Variability amplitudes are measured from the QUEST1 light curves. We find that black hole mass correlates with several measures of the variability amplitude at the 99 per cent significance level or better. The correlation does not appear to be caused by obvious selection effects inherent to flux-limited quasar samples, host galaxy contamination or other well-known correlations between quasar variability and luminosity/redshift. We evaluate variability as a function of rest-frame time lag using structure functions and find further support for the variability-black hole mass correlation.2007MNRAS.375..989Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/375/989CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/266 : QUEST1 200k light curve catalog (Rengstorf+, 2004)http://www.sdss.org : SDSS Home Pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/375/989https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/375/989http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/375/989https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/375/989https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/375/989http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/375/989GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/375/989/table1 (The total sample of 104 quasars with variability measurements and AGN parameters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/375/989/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/375/989/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/375/989/table1?GETtext/xml+votable180.050000true150.2938333-0.68030560.0055555555555555565/6740 6/25591 25852 25854-25855 25915 25917-25918 25931 25955 25961-25962 25991 25998 26000-26002 26017-26018 26020 26022 26024 26167 26175 26187-26188 26190-26191 26196-26198 26202 26209-26210 26246-26247 26251-26252 26256 26272-26274 26277-26278 26280 26878-26879 26943 26955 26958 26964 26969 26976 26980-26981 26986 27021 27023 27026 27032 27034 27043-27044 27048 27050 27220 27225-27226 27236 31367 31371-31372 31384 31397-31398 45052 45054-45055https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/375/989?format=asciiOpticaldefaultJ/MNRAS/375/989/table1The total sample of 104 quasars with variability measurements and AGN parameterszRedshiftsrc.redshiftfloatSDSSSDSS ID numbermeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintrmagApparent Sloan r magnitudemagphot.mag;em.opt.RfloatiMAGAbsolute magnitude in Sloan i filtermagphys.magAbsfloate_<DR>Weighted standard deviation of the distribution of variability amplitudes in the R filtermagstat.errorfloat<DR>Mean standard deviation of the distribution of variability amplitudes in the R filtermagsrc.var.amplitudefloatMed(DR)Median standard deviation of the distribution of variability amplitudes in the R filtermagsrc.var.amplitudefloatMax(DR)Maximum standard deviation of the distribution of variability amplitudes in the R filtermagsrc.var.amplitudefloate_<DV>Weighted standard deviation of the distribution of variability amplitudes in the V filtermagstat.errorfloat<DV>Mean standard deviation of the distribution of variability amplitudes in the V filtermagsrc.var.amplitudefloatMed(DV)Median standard deviation of the distribution of variability amplitudes in the V filtermagsrc.var.amplitudefloatMax(DV)Maximum standard deviation of the distribution of variability amplitudes in the V filtermagsrc.var.amplitudefloatlogMBHlog of black hole masslog(solMass)phys.massfloatlogLbollog of bolometric luminositylog(1e-07W)phys.luminosityfloatlogERlog of Eddington ratio defined as L_bol_/L_Edd_phys.luminosity;arith.ratiofloatGCLGlobal confidence level of variability as defined by Rengstorf et al. (2004, Cat. <II/266>)%stat.fit.goodnessfloatSDSSdataDisplay the SDSS datameta.ref.urlchar_RASimbad column added by the CDSdegpos.eq.ra;meta.main_DESimbad column added by the CDSdegpos.eq.dec;meta.main