J/ApJS/272/13ivo://CDS.VizieR/J/ApJS/272/13doi:10.26093/cds/vizier.22720013CDSPanda S.Sniegowska M.2025-02-13T20:13:51Z2024-11-08T16:45:42ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleivisible-astronomyspectroscopyredshiftedline-intensitiesblack-holesThis paper is the first in a series of papers that prepare and analyze spectral and other properties for a database of already-discovered changing-look active galactic nuclei (CL AGNs). Here we focus on the spectral fitting and analysis of broad emission lines in a sample of 93 CL AGNs collected from the literature with existing Sloan Digital Sky Survey (SDSS)/Baryon Oscillation Spectroscopic Survey (BOSS)/extended-BOSS spectroscopy where the H{beta} emission-line profile does not completely disappear in any epochs. Additionally, we have gathered older/newer spectral epochs from all the available SDSS data releases to make the database more complete. We use PyQSOFit and perform a homogeneous spectral decomposition of all of our SDSS spectra and tabulate the AGN continuum and emission-line properties per epoch per source, chronologically. This further allows us to categorize the sources in our sample as Turn-On or Turn-Off and subsequently check for repeated occurrences of such phases. We then estimate the black hole mass (M_BH_) and the Eddington ratio ({lambda}_Edd_) per epoch per source where the required parameters are available and well estimated. We demonstrate the movement of the source in the M_BH_-{lambda}_Edd_ plane, allowing us to check for systematic changes in the source's fundamental properties. We then track their transition along the optical plane of the Eigenvector 1 schema and categorize sources that either stay within the same population (A or B) or make an interpopulation movement as a function of spectral epoch. We also test the Balmer decrement (H{alpha}/H{beta}) of a subset of our sample of CL AGNs as a function of time and AGN luminosity.2024ApJS..272...13Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/272/13CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) (Ahumada+, 2020)VII/289 : SDSS quasar catalog, sixteenth data release (DR16Q) (Lyke+, 2020)J/ApJ/613/682 : AGN central masses (Peterson+, 2004)J/A+A/422/925 : Profile variability in lines of NGC 5548 (Shapovalova+ 2004)J/ApJS/166/470 : SDSS-Spitzer type I QSOs IR photometry (Richards+, 2006)J/ApJS/166/128 : Narrow line Seyfert 1 galaxies from SDSS-DR3 (Zhou+, 2006)J/MNRAS/383/581 : Broad-line Balmer decrements in blue AGN (Dong+, 2008)J/A+A/486/99 : Long-term sp. variability of NGC 4151 (Shapovalova+, 2008)J/ApJS/189/15 : FeII emission in a sample of AGN spectra (Kovacevic+, 2010)J/ApJ/788/159 : 17 Seyfert 1 galaxies light curves (Koshida+, 2014)J/ApJS/217/26 : Lick AGN monitoring 2011: light curves (Barth+, 2015)J/ApJ/806/128 : Space telescope RM project. I. NGC5548 (De Rosa+, 2015)J/MNRAS/455/2918 : Phot. & line luminosities for ASASSN-14li (Holoien+, 2016)J/MNRAS/463/296 : PS1 slow-blue nuclear hypervariables (Lawrence+, 2016)J/ApJ/827/118 : A new reverberation mapping campaign on NGC 5548 (Lu+, 2016)J/ApJ/821/33 : Broad Hb emission line in Seyfert galaxies (Runco+, 2016)J/ApJ/851/21 : SDSS RM project first year of observations (Grier+, 2017)J/ApJ/837/131 : Space telescope RM project. V. NGC5548 (Pei+, 2017)J/ApJS/229/39 : Narrow line Sy1 galaxies from SDSS-DR12 (Rakshit+, 2017)J/A+A/615/A167 : Catalog of NLS1s galaxies in 6dFGS survey (Chen+, 2018)J/ApJ/854/160 : SDSS & DES long-term variability QSOs (Rumbaugh+, 2018)J/ApJ/880/46 : Sp. & V-band monitoring of CTS C30.10 (Czerny+, 2019)J/ApJ/886/42 : Reverberation mapping & opt. sp. data of AGNs (Du+, 2019)J/ApJ/874/8 : Follow-up sp. of SDSS changing-look QSOs (Macleod+, 2019)J/ApJ/886/150 : VRI and K-band light curves of type 1 AGNs (Minezaki+, 2019)J/ApJS/241/34 : SDSS Reverberation Mapping (SDSS-RM) project (Shen+, 2019)J/ApJ/887/15 : Xinglong sp. of two changing-look SDSS AGNs (Wang+, 2019)J/MNRAS/491/4925 : Changing-state quasars with CRTS (Graham+, 2020)J/A+A/642/A150 : Quasars as standard candles. III. (Lusso+, 2020)J/ApJS/249/17 : SDSS QSO DR14 spectral properties (Rakshit+, 2020)J/ApJ/933/180 : TDSS. Changing-look quasars candidates (Green+, 2022)J/ApJS/258/38 : Iron template sp. from Mrk493 HST/STIS obs. (Park+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/272/13https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/272/13http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/272/13https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/272/13https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/272/13http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/272/13GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/272/13/table2 (Details of the sources in our sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/272/13/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/272/13/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/272/13/table2?GETtext/xml+votable180.050000true29.9901480.552917290.0055555555555555566/36 4453 4468 4519 4558 4579 4863 4886 4890 4895 4913-4914 5102 5134 5149 5177 5213 5227 5232 5380 5440 5448 5467 5498 5594 5754 5843 5864 5866 5887 5922 5985 6044 6057 6083 6270 6463 6502 6505 6556 6605 7287 7494 9636 9999 10020 10087 10519 10733 10747 10779 10900 10990 11107 11147 11191 11212-11213 11307 11419 11426 11446 17602 17702 17715 17727 17736 17753 17755-17757 17763-17764 17766 17772 17816 17818-17819 17822 17856 18006 18022 18035 18070 18072 18090 18096 18112 18176 18182 18751 18775 18782 18788-18789 18833 18848 18865 19025 19050-19051 19122 23208 27387 28351 28376 28394 28471 28652 31389https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/272/13?format=asciiOpticaldefaultJ/ApJS/272/13/table2Details of the sources in our samplem_SDSSNumber of SDSS spectra for this sourcemeta.numberintnullableSDSSSDSS identifier for the source (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharprimaryspPDisplay the spectral parameters for this sourcemeta.numberintnullablePlate[314/11678] SDSS Plate IDmeta.id;instr.plateintMJD[51641/58523] SDSS date of observation (JD-2400000.5)dtime.epochintFiber[3/983] SDSS Fiber IDmeta.id;instr.setupintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-8.7/64] Declination (J2000)degpos.eq.dec;meta.mainzspec[0.02/4.73] Spectroscopic redshift from SDSSsrc.redshiftdoubleSourceOriginal source used to collect the spectrum (1)meta.notecharFlagFlag on Excluded sources (2)meta.code.errorcharSpInteractive spectrum from SDSS-DR17 online datameta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSampleReference paper (G1)meta.bibcharNEDNED column added by the CDSmeta.ref.urlcharLEDAmeta.ref.urlcharSimbadNameSimbad column added by the CDSmeta.idcharnullableJ/ApJS/272/13/spparamSpectral parameters for the using PyQSOFit-I (Table 3) or PyQSOFit-II (Table 4)SampleReference paper (G1)meta.bibcharSDSSSDSS identifier for the sourcemeta.id;meta.mainchare_EWHb[0.2/128] Error on the EWHb0.1nmstat.error;spect.line.eqWidth;em.line.HbetafloatEWHa[6.7/1579]? Equivalent width of H{alpha}0.1nmspect.line.eqWidth;em.line.Halphafloatnullablee_EWHa[0.9/164]? Error on EWHa0.1nmstat.error;spect.line.eqWidth;em.line.HalphafloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJD[51783/58522] SDSS date of observation (JD-2400000.5)dtime.epochintlogL3000[43.16/45.4]? AGN continuum luminosity (in log-scale) at 300nmlog(1e-07W)phys.luminosity;em.opt.U;spect.continuumfloatnullablee_logL3000[0/0.03]? Error on logL3000log(1e-07W)stat.error;phys.luminosity;em.opt.UfloatnullablelogL5100[41.5/45.3] AGN continuum luminosity (in log-scale) at 510nmlog(1e-07W)phys.luminosity;em.opt.V;spect.continuumfloate_logL5100[0/0.02] Error on logL5100log(1e-07W)stat.error;phys.luminosity;em.opt.VfloatlogL6000[41.76/45.22]? AGN continuum luminosity (in log-scale) at 600nmlog(1e-07W)phys.luminosity;em.opt.R;spect.continuumfloatnullableFWHMHb[2823/30484] FWHM of the broad Hb componentkm.s**-1spect.line.width;em.line.Hbetadoublee_FWHMHb[0.05/9079] Error on FWHMHbkm.s**-1stat.error;spect.line.width;em.line.HbetafloatRFe[0/1.11]? Ratio of the EW(FeII) between 443.4-468.4nm to EW (Hb)spect.line.eqWidth;arith.ratiofloatnullablelogLbol[42.5/46.3] AGN bolometric luminosity (in log-scale)log(1e-07W)phys.luminosityfloate_logLbol[0/0.02] Error on logLbollog(1e-07W)stat.error;phys.luminosityfloatlogMBH[6.8/10.1] Black hole mass (in log-scale)log(solMass)phys.massfloate_logMBH[0/2] Error on logMBHlog(solMass)stat.error;phys.massfloatlogEddr[-3.01/-0.5] Eddington ratio (in log-scale)phys.mass;arith.ratiofloate_logEddr[0/2] Error on logEddrstat.error;phys.mass;arith.ratiofloatdelL5100[-11.6/9.8] Change in AGN luminosity at 510nm (1)1e+37Wphys.luminosity;em.opt.V;arith.difffloate_logL6000[0.01/0.06]? Error on logL6000log(1e-07W)stat.error;phys.luminosity;em.opt.RfloatnullableEWMgII[0.2/388]? Equivalent width of MgII0.1nmspect.line.eqWidthfloatnullablee_EWMgII[0.39/58]? Error on EWMgII0.1nmstat.error;spect.line.eqWidthfloatnullableEWHb[11/904] Equivalent width of H{beta}0.1nmspect.line.eqWidth;em.line.Hbetafloate_RFe[0/0.4]? Error on the RFestat.error;spect.line.eqWidth;arith.ratiofloatnullable