J/ApJS/185/511ivo://CDS.VizieR/J/ApJS/185/511doi:10.26093/cds/vizier.21850511CDSPoon H.Fan J.H.Fu J.N.2020-07-17T13:06:26Z2010-05-31T20:27:51ZCDS 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 monitored the BL Lac object S5 0716+714 in the optical band during 2008 October and December and 2009 February with a best temporal resolution of about 5 minutes in the BVRI bands. Four fast flares were observed with amplitudes ranging from 0.3 to 0.75mag. The source remained active during the whole monitoring campaign, showing microvariability in all days except for one. The overall variability amplitudes are {Delta}B~0.89, {Delta}V~0.80, {Delta}R~0.73, and {Delta}I~0.51mag. Typical timescales of microvariability range from 2 to 8hr. The overall V-R color index ranges from 0.37 to 0.59. Strong bluer-when-brighter chromatism was found on internight timescales. However, a different spectral behavior was found on intranight timescales. A possible time lag of ~11 minutes between B and I bands was found on one night. The shock-in-jet model and geometric effects can be applied to explain the source's intranight behavior.2009ApJS..185..511Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/185/511CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/327/61 : BV(RI)c photometry of S5 0716+714 (Ghisellini+ 1997)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/451/435 : BV(RI)c photometry of S5 0716+714 (Montagni+, 2006)J/AZh/83/310 : BV(RI)c photometry of S5 0716+714 (Amirkhanyan+, 2006)J/AJ/133/1599 : B'V'R' photometry of S5 0716+714 (Wu+, 2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/185/511https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/185/511http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/185/511https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/185/511https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/185/511http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/185/511GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/ApJS/185/511/table5Results of microvariability of BL Lacertae S5 0716+714recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintf_Date[*] Note on Date (1)meta.codecharDateUniversal date of observationtime.epoch;obsnullableBand[BVRI] Bandinstr.bandpasscharAmp? Intranight variability amplitudemagsrc.var.amplitudefloatnullableNNumber of data pointsmeta.numberintCValue of the C parameter (Romero et al., 1999A&AS..135..477R)stat.paramfloatVar[VN] V indicates that the source is variablemeta.code;src.varcharsigmarms errorstat.errorfloatr? Pearson correlation coefficient of the V-R color index vs R magnitudestat.fit.paramfloatnullableJ/ApJS/185/511/photoObservational data in BVRI filters (tables 1--4 of paper)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian Date of observationdtime.epochdoublemagThe B,V,R or I band magnitudemagphot.magfloate_magThe 1{sigma} error in magmagstat.error;phot.magfloatBandFilter (B, V, R or I)meta.code;instr.filterchar