J/ApJ/912/92ivo://CDS.VizieR/J/ApJ/912/92doi:10.26093/cds/vizier.19120092CDSFeng H.-C.Liu H.T.Bai J.M.Yang Z.-X.Hu C.Li S.-S.Yang S.,Lu K.-X.Xiao M.2023-09-27T06:41:21Z2022-11-25T08:03:14ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleiphotometryvisible-astronomyspectroscopyNGC 2617 attracted a lot of attention after the detection of changes in its spectral type; the geometry and kinematics of the broad-line region (BLR) are still ambiguous. In this paper, we present the high cadence (~2 days) reverberation mapping campaign of NGC 2617 from 2019-October to 2020-May undertaken at the Lijiang 2.4m telescope. For the first time, the velocity-resolved reverberation signature of the object was successfully detected. Both H{alpha} and H{beta} show an asymmetrical profile with a peak in the velocity-resolved time lags. For both of the lines, the lag of the line core is longer than those of the relevant wings, and the peak of the velocity-resolved lags is slightly blueshifted. These characteristics are not consistent with the theoretical prediction of the inflow, outflow or Keplerian disk model. Our observations give the time lags of H{alpha}, H{beta}, H{gamma}, and HeI, with a ratio of {tau}_H{alpha}_:{tau}_H{beta}_: {tau}_H{gamma}_:{tau}_HeI_=1.27:1.00:0.89:0.20, which indicates a stratified structure in the BLR of the object. It is the first time that the lags of H{alpha} and HeI are obtained. Assuming a virial factor of f=5.5 for the dispersion width of the line, the masses of the black holes derived from H{alpha} and H{beta} are 23.8_-2.7_^+5.4^ and 21.1_-4.4_^+3.8^x10^6^M_{sun}_, respectively. Our observed results indicate the complexity of the BLR of NGC 2617.2021ApJ...912...92Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/912/92CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJ/613/682 : AGN central masses & broad-line region sizes (Peterson+, 2004)J/ApJ/716/993 : LAMP: reverberation mapping of H and He lines (Bentz+, 2010)J/ApJ/788/48 : X-ray through NIR photometry of NGC 2617 (Shappee+, 2014)J/ApJS/217/26 : Lick AGN monitoring 2011: light curves (Barth+, 2015)J/ApJ/840/97 : Opt. reverberation mapping of 5 AGNs (Fausnaugh+, 2017)J/ApJ/849/161 : BVRI light curves of the BL Lac object Mrk 501 (Feng+, 2017)J/ApJ/866/133 : Continuum-H{beta} light curves of 5 Seyfert 1 (De Rosa+, 2018)J/ApJ/869/142 : Monitoring AGNs with H{beta} Asymmetry (MAHA). I. (Du+, 2018)J/ApJ/854/107 : Light curves of 2 Seyfert 1 galaxies (Fausnaugh+, 2018)J/ApJ/880/120 : Phot. of the tidal disruption event PS18kh (Holoien+, 2019)J/ApJ/883/111 : UV-Opt LCs of ASASSN-19bt detected by TESS (Holoien+, 2019)J/ApJ/880/155 : RI photometry of blazars S5 0716+714 and 3C 273 (Liu+, 2019)J/ApJ/883/94 : Optical and UV follow-up of 1ES 1927+654 (Trakhtenbrot+, 2019)J/ApJ/876/49 : A 10yr reverberation mapping campaign for 3C273 (Zhang+, 2019)J/ApJ/888/30 : BVRI & spectroscopic light curves of S5 0716+714 (Feng+, 2020)J/ApJ/890/71 : 5100{AA} continuum & em. lines LCs of PG2130+099 (Hu+, 2020)J/ApJ/909/18 : Reverberation mapping monitoring of NGC3516 (Feng+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/912/92https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/912/92http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/912/92https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/912/92https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/912/92http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/912/92GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap4.0234554602041486e-19 4.920466254354166e-19OpticaldefaultJ/ApJ/912/92/table1LCs of photometry and linesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDph[770.39/977.04] Julian Date of photometry; JD-2458000dtime.epochdoubleBmag[2.3/2.53] Apparent Johnson B band magnitudemagphot.mag;em.opt.Bfloate_Bmag[0.005/0.02] Uncertainty in Bmagmagstat.error;phot.magfloatJDsp[779.4/974.06]? Julian Date of spectroscopy; JD-2458000dtime.epochdoublenullableHa[53/75]? H{alpha} flux, 10^-14^erg/s/cm21e-14mW.m**-2phot.fluxfloatnullablee_Ha[1.35/1.36]? Uncertainty in Ha1e-14mW.m**-2stat.errorfloatnullableHb[6.9/13.5]? H{beta} flux, 10^-14^erg/s/cm21e-14mW.m**-2phot.fluxfloatnullablee_Hb[0.44/0.46]? Uncertainty in Hb1e-14mW.m**-2stat.errorfloatnullableHg[1/6.3]? H{gamma} flux, 10^-14^erg/s/cm21e-14mW.m**-2phot.fluxfloatnullablee_Hg[0.57]? Uncertainty in Hg1e-14mW.m**-2stat.errorfloatnullableHeI[1/3.1]? HeI flux, 10^-14^erg/s/cm21e-14mW.m**-2phot.fluxfloatnullablee_HeI[0.3/0.43]? Uncertainty in HeI1e-14mW.m**-2stat.errorfloatnullable