J/ApJS/277/18ivo://CDS.VizieR/J/ApJS/277/18doi:10.26093/cds/vizier/bb-8n-jCDSLi H.-Z.Guo D.-F.Qin L.-H.Liu F.Liu H.-T.Yi T.-F.Gao Q.-G.,Huang S.-F.Gao X.Chen Xu2026-03-03T20:03:08Z2026-02-16T11:50:40ZCDS support team

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

cds-question@unistra.frbl-lacertae-objectsphotometryvisible-astronomyWe present photometric observations of the BL Lacertae object S5_0716+714 with a temporal resolution of 120s in the Sloan i' and r' bands. These observations were conducted using the Comet Search Program telescope at Xingming Observatory from 2018 December 22 to 2020 February 15, and more than 5600 effective images were obtained on each filter across 79 nights. Additionally, we compiled long-term variability data spanning 34yr in the optical UBVRI bands. Using the power-enhanced F-test and nested ANOVA test, we found intraday variability (IDV) on 31 nights and possible IDV on 20 nights in the i' band. Similarly, IDV was detected on 35 nights in the r' band, while possible IDV was observed on 22 nights. The minimum variability timescale is 7.33{\pm}0.74 minutes, and the estimated black hole masses are (0.68~5.12)x10^8^M_{sun}_. The spectral variability and long-term optical light curves reveal a bluer-when-brighter trend on intraday timescales. The long-term optical flux density and spectral index exhibit periodic variability with a timescale of about 1038d. An anticorrelation between optical flux and spectral index was observed, with a time delay of -140 days. Variability across different optical bands exhibited a strong correlation, with no discernible time lag. From the IDV, spectral variability, correlation, and time delays between different bands, we conclude that these radiation characteristics may result from the shock-in-jet model scenario.2025ApJS..277...18Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/277/18CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/327/61 : BV(RI)c photometry of S5 0716+714 (Ghisellini+ 1997)J/A+AS/143/357 : Tuorla Quasar Monitoring (Katajainen+ 2000)J/A+A/402/151 : S5 0716+714 UBVRI photometry (Raiteri+, 2003)J/AJ/129/1818 : Photometry of S5 0716+714 (Wu+, 2005)J/A+A/450/39 : BVRI photometry of 8 red blazars (Gu+, 2006)J/A+A/451/435 : BV(RI)c photometry of S5 0716+714 (Montagni+, 2006)J/AJ/133/1599 : B'V'R' photometry of S5 0716+714 (Wu+, 2007)J/AJ/135/1384 : R-band variability in 5 blazars (Gupta+, 2008)J/AJ/136/1846 : BVRI light curves of S5 0716+714 (Zhang+, 2008)J/MNRAS/385/823 : UBVRI light curves of OJ 287 (Zheng+, 2008)J/ApJS/185/511 : Optical microvariability of S5 0716+714 (Poon+, 2009)J/ApJ/716/30 : SED of Fermi bright blazars (Abdo+, 2010)J/ApJ/731/118 : R-band variability in blazar S5 0716+71 (Chandra+, 2011)J/AJ/143/108 : B'V'R' phot. of the BL Lac object S5 0716+714 (Wu+, 2012)J/A+A/558/A92 : S5 0716+714 microvariability observation (Bhatta+, 2013)J/ApJ/768/40 : R-band and pol. of the blazar S5 0716+71 (Larionov+, 2013)J/A+A/552/A98 : Optical monitoring of extragalactic sources (Taris+, 2013)J/ApJ/783/83 : BVRI photometry of S5 0716+714 (Liao+, 2014)J/ApJS/218/18 : 2004-2012 BVRI obs. of blazar S5 0716+714 (Dai+, 2015)J/ApJS/222/24 : VRI LCs of Mrk 501 from 2010 to 2015 (Xiong+, 2016)J/AJ/154/42 : BVRI photometry of S5 0716+714 in 2012 (Hong+, 2017)J/ApJ/846/98 : Jet kinematics of blazars at 43GHz (Jorstad+, 2017)J/ApJS/229/21 : VRI monitoring of the QSO 3C 273 in 2005-2016 (Xiong+, 2017)J/ApJS/235/39 : Jet properties of {gamma}-ray-loud 3FGL AGNs (Chen, 2018)J/AJ/155/31 : 2005-2012 BVRI obs. of blazar S5 0716+714 (Hong+, 2018)J/A+A/619/A45 : S5 0716+714 LCs (MAGIC Collaboration+, 2018)J/A+A/620/A185 : Long-term optical monitoring of TeV Blazars (Nilsson+, 2018)J/ApJ/880/155 : RI photometry of blazars S5 0716+714 and 3C 273 (Liu+, 2019)J/ApJ/884/92 : 7yrs of VRI obs. of S5 0716+714 and its flares (Xu+, 2019)J/ApJ/888/30 : BVRI and spectroscopic LCs of S5 0716+714 (Feng+, 2020)J/ApJ/902/42 : Spectroscopic monitoring of blazar S5 0716+714 (Feng+, 2020)J/ApJ/893/68 : RadioAstron. III. S5 0716+71 (Kravchenko+, 2020)J/ApJS/247/49 : gri obs. of S5 0716+714 (2017-2019) (Xiong+, 2020)J/ApJS/260/47 : 19.3yr R-band monitoring of 1ES 2344+514 (Cai+, 2022)J/ApJ/928/86 : BVRI photometry of S5 0716+714 (Gorbachev+, 2022)J/MNRAS/510/1791 : Blazars study with ZTF DR6 and Roma-BZCAT (Negi+, 2022)J/ApJS/268/23 : Magnetic fields of Fermi blazars (Fan+, 2023)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/277/18https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/277/18http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/277/18https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/277/18https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/277/18http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/277/18GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/ApJS/277/18/table2The log of observations of S5 0716+714 in the Sloan i' and r' bandsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateiObservation date of i' bandtime.epoch;em.opt.InullableMJDi[8475/8895.5]? Modified Julian Date of i' band observation; MJDi-50000dtime.epoch;em.opt.Idoublenullableimag[11.8/14.7]? Apparent i' band magnitudemagphot.mag;em.opt.Ifloatnullablee_imag[0.001/0.2]? Uncertainty in imagmagstat.error;phot.mag;em.opt.IfloatnullableDaterObservation date of r' band; YYYY-MM-DD formattime.epoch;em.opt.RcharMJDr[8475/8895.5] Modified Julian Date of r' band observation; MJDr-50000dtime.epoch;em.opt.Rdoublermag[12/15.1] Apparent r' band magnitudemagphot.mag;em.opt.Rfloate_rmag[0.001/0.3] Uncertainty in rmagmagstat.error;phot.mag;em.opt.RfloatJ/ApJS/277/18/table3Statistic parameters of intranight light curvesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateObservation datetime.epoch;obsnullableBand[RI] Band identifiermeta.code;instr.filtercharN[10/117] Number of observations per nightmeta.numberintDeltaT[0.8/11.8] Observation durationhtime.duration;obsfloatFPeF[0.03/143.3] Power-enhanced F-test valuestat.valuefloatFPeFc[1.4/3.6] Power-enhanced F-test critical value at 99% confidencestat.valuefloatFNA[0.06/69.8] Nested ANOVA F-valuestat.valuefloatFNAc[2.5/25.5] Nested ANOVA critical value at 99% confidencestat.valuefloatV/NMicrobariability label (1)meta.code;src.varcharAmp[7.4/100.8] Amplitude%src.var.amplitudefloatmag[11.8/14.8] Average magnitude in Bandmagphot.mag;stat.mean;em.optfloat