J/ApJ/849/161ivo://CDS.VizieR/J/ApJ/849/161doi:10.26093/cds/vizier.18490161CDSFeng H.-C.Liu H.T.Fan X.L.Zhao Y.Bai J.M.Wang F.Xiong D.R.,Li S.K.2018-09-26T14:40:15Z2018-07-20T12:15:35ZCDS support team

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

cds-question@unistra.frbl-lacertae-objectsinfrared-photometryvisible-astronomybroad-band-photometryWe present our observations of the optical intra-day variability (IDV) in {gamma}-ray BL Lac object Mrk 501. The observations were run with the 1.02m and 2.4m optical telescopes at Yunnan Observatories from 2005 April to 2012 May. The light curve at the R band on 2010 May 15 passes both variability tests (the F-test and the ANOVA test). A flare within the light curve on 2010 May 15 has a magnitude change of {Delta}m=0.03+/-0.005_stat_+/-0.007_sys_mag, a darkening timescale of {tau}_d_=26.7min., and an amplitude of IDV Amp=2.9%+/-0.7% . A decline described by 11 consecutive flux measurements within the flare can be fitted linearly with a Pearson's correlation coefficient r=0.945 at the confidence level of >99.99% . Under the assumptions that the IDV is tightly connected to the mass of the black hole, and that the flare duration, being two times {tau}_d_, is representative of the minimum characteristic timescale, we can derive upper bounds to the mass of the black hole. In the case of the Kerr black hole, the timescale of {Delta}t_min_^ob^=0.89hr gives M_{bullet}_<~10^9.20^M_{sun}_, which is consistent with measurements reported in the literature. This agreement indicates that the hypothesis about M_{bullet}_ and {Delta}t_min_^ob^ is consistent with the measurements/data.2017ApJ...849..161Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/849/161CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+AS/98/393 : 1Jy BL Lac Objects: Observational Data (Stickel+ 1993)J/A+AS/116/403 : VRI photometry of stars in 12 BL Lac objects (Fiorucci+, 1996)J/A+AS/132/83 : BVRI photometry of 7 BL Lac objects (Bai+ 1998)J/ApJ/522/846 : Optical monitoring of GeV loud blazars (Xie+, 1999)J/ApJ/525/127 : RGB sample of BL Lacertae objects (Laurent-Muehleisen+, 1999)J/A+A/445/441 : SED of BL Lacertae objects (Nieppola+, 2006)J/AJ/135/1384 : R-band variability in 5 blazars (Gupta+, 2008)J/ApJ/696/580 : Properties of weak emission-line QSOs (WLQ) (Shemmer+, 2009)J/ApJ/716/30 : SED of Fermi bright blazars (Abdo+, 2010)J/ApJ/722/520 : Gamma-ray light curves of Fermi blazars (Abdo+, 2010)J/ApJS/192/12 : Photometry of the blazar PKS 0537-441 (Impiombato+, 2011)J/ApJ/761/125 : X and {gamma} spectral indexes of Fermi blazars (Fan+, 2012)J/A+A/548/A79 : INTEGRAL-OMC optically var. sources (Alfonso-Garzon+, 2012)J/A+A/563/A57 : Long-term variability of AGN at hard X-rays (Soldi+, 2014)J/ApJ/782/45 : SEAMBHs. I. Mrk 142, Mrk 335, and IRAS F12397+3333 (Du+, 2014)J/MNRAS/438/3058 : 15GHz variability of {gamma}-ray blazars (Richards+, 2014)J/MNRAS/439/690 : Optical/{gamma}-ray variability in blazars (Hovatta+, 2014)J/ApJS/213/26 : Optical light curves of PHL1811 and 3C273 (Fan+, 2014)J/A+A/573/A50 : Multiwavelength obs. of Mrk 501 in 2008 (Aleksic+, 2015)J/ApJS/218/18 : 2004-2012 BVRI observations of blazar S5 0716+714 (Dai+, 2015)J/ApJS/222/24 : VRI LCs of BL Lac object Mrk 501 from 2010-2015 (Xiong+, 2016)J/AZh/93/605 : AGN long-term variability (Volvach+, 2016)J/MNRAS/467/4565 : Bimodal radio variability in OVRO blazars (Liodakis+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/849/161https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/849/161http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/849/161https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/849/161https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/849/161http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/849/161GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap1.9821045660507152e-19 4.920466254354166e-19InfraredOpticaldefaultJ/ApJ/849/161/table2The observational data for Mrk 501recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJD-B[3465.8/6051]? B band Modified Julian Date of observation; MJD-50000dtime.epochdoublenullableBmag[13.8/14.9]? Apparent B band magnitudemagphot.mag;em.opt.BfloatnullableFWHM-B[1.2/4.5]? Full-Width at Half Maximum of B band aperturearcsecphys.angSizefloatnullableMJD-I[3465.8/6059]? I band Modified Julian Date of observation; MJD-50000dtime.epochdoublenullableImag[12/12.7]? Apparent I band magnitudemagphot.mag;em.opt.IfloatnullableFWHM-I[1/5.2]? Full-Width at Half Maximum of I band aperturearcsecphys.angSizefloatnullableMJD-R[3465.8/6065] R band Modified Julian Date of observation; MJD-50000dtime.epochdoubleRmag[12.7/18.9] Apparent R band magnitudemagphot.mag;em.opt.RfloatFWHM-R[1.1/5.4] Full-Width at Half Maximum of R band aperturearcsecphys.angSizefloatMJD-V[3465.8/6061]? V band Modified Julian Date of observation; MJD-50000dtime.epochdoublenullableVmag[13/14]? Apparent V band magnitudemagphot.mag;em.opt.VfloatnullableFWHM-V[1.1/3.6]? Full-Width at Half Maximum of V band aperturearcsecphys.angSizefloatnullable