J/ApJ/795/38ivo://CDS.VizieR/J/ApJ/795/38doi:10.26093/cds/vizier.17950038CDSPei L.Barth A.J.Aldering G.S.Briley M.M.Carroll C.J.Carson D.J.,Cenko S.B.Clubb K.I.Cohen D.P.Cucchiara A.Desjardins T.D.,Edelson R.Fang J.J.Fedrow J.M.Filippenko A.V.Fox O.D.Furniss A.,Gates E.L.Gregg M.Gustafson S.Horst J.C.Joner M.D.Kelly P.L.,Lacy M.Laney C.D.Leonard D.C.Li W.Malkan M.A.Margon B.,Neeleman M.Nguyen M.L.Prochaska J.X.Ross N.R.Sand D.J.,Searcy K.J.Shivvers I.S.Silverman J.M.Smith G.H.Suzuki N.,Smith K.L.Tytler D.Werk J.K.Worseck G.2017-07-18T15:18:31Z2017-05-22T12:34:36ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleivisible-astronomynarrow-band-photometryspectroscopyKA1858+4850 is a narrow-line Seyfert 1 galaxy at redshift 0.078 and is among the brightest active galaxies monitored by the Kepler mission. We have carried out a reverberation mapping campaign designed to measure the broad-line region size and estimate the mass of the black hole in this galaxy. We obtained 74 epochs of spectroscopic data using the Kast Spectrograph at the Lick 3 m telescope from 2012 February to November, and obtained complementary V-band images from five other ground-based telescopes. We measured the H{beta} light curve lag with respect to the V-band continuum light curve using both cross-correlation techniques (CCF) and continuum light curve variability modeling with the JAVELIN method and found rest-frame lags of {tau}_CCF_=13.53_-2.32_^+2.03^ days and {tau}_JAVELIN_=13.15_-1.00_^+1.08^ days. The H{beta} rms line profile has a width of {sigma}_line_=770+/-49 km/s. Combining these two results and assuming a virial scale factor of f=5.13, we obtained a virial estimate of M_BH_=8.06_-1.72_^+1.59^x10^6^M_{sun}_ for the mass of the central black hole and an Eddington ratio of L/L_Edd_{approx}0.2. We also obtained consistent but slightly shorter emission-line lags with respect to the Kepler light curve. Thanks to the Kepler mission, the light curve of KA1858+4850 has among the highest cadences and signal-to-noise ratios ever measured for an active galactic nucleus; thus, our black hole mass measurement will serve as a reference point for relations between black hole mass and continuum variability characteristics in active galactic nuclei.2014ApJ...795...38Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/795/38CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/other/ChJAA/2.501 : Seyfert 1 galaxies (Zhou+, 2002)J/ApJS/166/128 : Narrow line Seyfert 1 galaxies from SDSS-DR3J/ApJ/755/60 : Reverberation mapping for five Seyfert 1 galaxieshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/795/38https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/795/38http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/795/38https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/795/38https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/795/38http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/795/38GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/ApJ/795/38/table2Photometry measurements for KA1858+4850recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateUT Date of the observationtime.epoch;obsTCode[FKMNW] Telescope code (1)meta.code;instr.telcharHJDHeliocentric Julian Date of observation (HJD-2450000)dtime.epochdoubleVmagThe V band magnitudemagphot.mag;em.opt.Vfloate_VmagUncertainty in Vmagmagstat.error;phot.mag;em.opt.VfloatJ/ApJ/795/38/table4Spectroscopic measurements for KA1858+4850recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateUT Date of the observationtime.epoch;obsHJDHeliocentric Julian Date of observation (HJD-2450000)dtime.epochdoubleSNRSignal-to-Noise ratiostat.snrintfHbIntegrated H{beta} line flux (1)1e-18W.m**-2phot.flux;em.line.Hbeta;spect.linefloate_fHbUncertainty in fHb (1)1e-18W.m**-2stat.errorfloatfHgIntegrated H{gamma} line flux (1)1e-18W.m**-2phot.flux;em.line.Hgamma;spect.linefloate_fHgUncertainty in fHg (1)1e-18W.m**-2stat.errorfloatfHdIntegrated H{delta} line flux (1)1e-18W.m**-2phot.flux;em.line.Hdelta;spect.linefloate_fHdUncertainty in fHd (1)1e-18W.m**-2stat.errorfloatfHeIIIntegrated He II line flux (1)1e-18W.m**-2phot.flux;spect.linefloate_fHeIIUncertainty in fHeII (1)1e-18W.m**-2stat.errorfloat