J/A+A/591/A21ivo://CDS.VizieR/J/A+A/591/A21doi:10.26093/cds/vizier.35910021CDSMarchesini E.J.Andruchow I.Cellone S.A.Combi J.A.Zibecchi L.,Marti J.Romero G.E.Munoz-Arjonilla A.J.Luque-Escamilla P.,Sanchez-Sutil J.R.2017-10-12T13:00:38Z2016-06-06T07:42:16ZCDS support team

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

cds-question@unistra.frbl-lacertae-objectsphotometryWe aim at investigating the time-behaviour of a sample of gamma-ray blazars. We present the results from a 13 month-long optical photometry monitoring campaign of the blazars PKS0048-097, PKS0754+100, [HB89] 0827+243, PKS0851+202, PKS1253-055, PKS1510-089, PKS1749+096, PKS2230+114 and PKS2251+158. We analyse the variability of each object, focusing on different time-scales (long term, short term, and microvariability), in an attempt to achieve a statistical comparison of the results. After applying a geometric model to explain the variability results, we found that it is possible that a slight change in the direction of the jet generates the variations detected in some objects during this campaign.2016A&A...591A..21Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/591/A21CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/591/A21https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/591/A21http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/591/A21https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/591/A21https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/591/A21http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/591/A21GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/591/A21/sample (Sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/591/A21/sample?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/591/A21/sample?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/591/A21/sample?GETtext/xml+votable180.050000true12.672083-9.4847220.0055555555555555566/4695 4820 17579 19398 20099 22363 26131 31894 44908https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/591/A21?format=asciiOpticaldefaultJ/A+A/591/A21/sampleSampleSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameBlazar namemeta.id;meta.maincharprimaryTypeType of sourcesrc.classcharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVmagVisual magnitude (as found in NED)magphot.mag;em.opt.VfloatzRedshift (as found in NED)src.redshiftfloatLCShow BV light curvesmeta.ref.urlcharJ/A+A/591/A21/table2Statistical results for the differential light curvesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameBlazar namemeta.id;meta.maincharDateObservation UT date or "All nights"time.epoch;obscharsigmaVV-band observational error (1)magstat.error;phot.mag;em.opt.VfloatsigmaRR-band observational error (1)magstat.errorfloatVarV[V NV] V-band variability flagmeta.code;meta.code.multipcharVarR[V NV] R-band variability flagmeta.code;meta.code.multipcharFVV-band confidence parameter from the F-test (2)stat.fit.goodnessfloatFRR-band confidence parameter from the F-test (2)stat.fit.goodnessfloatGammaVV-band gamma corrective factor (3)arith.factorfloatGammaRR-band gamma corrective factor (3)arith.factorfloatNVNumber of points in the V light curvesmeta.numberintNRNumber of points in the R light curvesmeta.numberintFtVV-band F^t^ critical value (2)stat.fit.paramfloatFtRR-band F^t^ critical value (2)stat.fit.paramfloatJ/A+A/591/A21/photBV differential photometry for the 9 BL LacsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameBlazar namemeta.id;meta.maincharBand[RV] Observed bandinstr.bandpasscharSeqSequential number of observations within the source and the bandmeta.recordintHJDHeliocentric Julian Datedtime.epochdoubledHJDDifferential Heliocentric Julian Date (counting from the last integer date)dtime.epochdoubledmagDifferential magnitude (1)magphot.mag;arith.difffloate_dmagrms uncertainty on dmagmagstat.error;phot.magfloatdmagCDifferential control magnitude (2)magphot.mag;arith.difffloate_dmagC? rms uncertainty on dmagCmagstat.error;phot.magfloatnullable