J/ApJ/884/92ivo://CDS.VizieR/J/ApJ/884/92doi:10.26093/cds/vizier.18840092CDSXu J.Hu S.Webb J.R.Bhatta G.Jiang Y.Chen XuAlexeeva S.Li Y.2021-09-06T12:31:52Z2021-04-19T08:02:59ZCDS support team

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

cds-question@unistra.frbl-lacertae-objectsinfrared-photometryvisible-astronomyphotometryThe typical blazar S5 0716+714 is very interesting due to its rapid and large-amplitude variability and high duty cycle of microvariability in the optical band. We analyze the observations in the I, R, and V bands obtained with the 1.0m telescope at Weihai observatory of Shandong University from 2011 to 2018. The model of synchrotron radiation from turbulent cells in a jet has been proposed as a mechanism for explaining microvariability seen in blazar light curves. Parameters such as the sizes of turbulent cells, the enhanced particle densities, and the location of the turbulent cells in the jet can be studied using this model. The model predicts a time lag between variations, as observed in different frequency bands. An automatic model fitting method for microvariability is developed, and the fitting results of our multi-frequency microvariability observations support the model. The results show that both the amplitude and duration of flares decomposed from the microvariability light curves conform to the log-normal distribution. The turbulent cell size is within the range of about 5-55au, and the time lags of the microvariability flares between the I-R and R-V bands should be several minutes. The time lags obtained from the turbulence model are consistent with the fitting statistical results, and the time lags of flares are correlated with the time lags of the whole light curve.2019ApJ...884...92Xhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/884/92CatalogResearchIsServedByTAP 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/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/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)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/ApJS/185/511 : Optical microvariability of S5 0716+714 (Poon+, 2009)J/ApJ/722/520 : Gamma-ray light curves of Fermi blazars (Abdo+, 2010)J/ApJ/731/118 : R-band variability in blazar S5 0716+71 (Chandra+, 2011)J/AJ/143/108 : B'V'R' photometry of the BL Lac object S5 0716+714 (Wu+, 2012)J/ApJ/768/40 : R-band and pol. of the blazar S5 0716+71 (Larionov+, 2013)J/A+A/558/A92 : S5 0716+714 microvariability observation (Bhatta+, 2013)J/ApJ/783/83 : BVRI photometry of S5 0716+714 (Liao+, 2014)J/ApJS/218/18 : 2004-2012 BVRI observations of blazar S5 0716+714 (Dai+, 2015)J/AJ/154/42 : BVRI photometry of S5 0716+714 in 2012 (Hong+, 2017)J/PAZh/43/407 : S5 0716+714 pol. & brightness 1991-2004 (Doroshenko+ 2017)J/A+A/601/A12 : S5 0716+714 VLBI K- and Q-band variability (Lee+, 2017)J/AJ/155/31 : 2005-2012 BVRI obs. of blazar S5 0716+714 (Hong+, 2018)J/A+A/619/A45 : S5 0716+714 multi-wavelength LCs (MAGIC Collaboration+, 2018)J/ApJ/880/155 : RI photometry of blazars S5 0716+714 and 3C 273 (Liu+, 2019)J/ApJS/247/49 : gri obs. of the blazar S5 0716+714 (2017-2019) (Xiong+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/884/92https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/884/92http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/884/92https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/884/92https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/884/92http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/884/92GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/ApJ/884/92/table1Photometric results catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateDate of the observation (UT)time.epochnullableBandBand used in the observation (V, R or I)meta.code;instr.filtercharJD[2455578.15/2458171.17] Julian date of observationdtime.epochdoubleindexedmag[11.71/15.65] Apparent magnitude in Bandmagphot.magfloate_mag[0.001/0.5] Error in magmagstat.error;phot.magfloatJ/ApJ/884/92/table2The statistical results catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateDate of the observation (UT)time.epochnullableBandBand used in the observation (V, R or I)meta.code;instr.filtercharNp[11/245] Number of data pointsmeta.numberintNfl[1/14] Number of data flaresmeta.numberintJ/ApJ/884/92/table3Flare parameters used to fit the datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateDate of the observation (UT)time.epochnullableJD[2455578/2458171] Julian Day of the observationtime.epoch;obsintBandBand used in the observation (V, R or I)meta.code;instr.filtercharSeq[1/14] Single day flare serial numbermeta.id;meta.mainintCenter[-1.32/10.2] Central moment of flarehtime.epochfloatAmp[0/6.73] Flare amplitudemJysrc.var.amplitudefloatN10-5[0/51.61] Turbulent particle number density1e-05s**-1.m**-3meta.number;phys.densityfloattflare[0/8.81] Duration of flarehtime.durationfloatScell[0/104.4] Turbulent cell sizeAUphys.size.radiusfloat