J/A+A/562/A79ivo://CDS.VizieR/J/A+A/562/A79doi:10.26093/cds/vizier.35620079CDSSandrinelli A.Covino S.Treves A.2017-09-22T16:16:44Z2014-02-10T08:11:23ZCDS support team

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

cds-question@unistra.frquasarsinfrared-photometryvisible-astronomyphotometryWe present the light curves of six BL Lac objects, PKS 0537-441, PKS 0735+17, OJ 287, PKS 2005-489, PKS 2155- 304, W Comae, and of the Flat Spectrum Radio Quasar PKS 1510-089, as a part of a photometric monitoring program in the near-infrared/optical bands started in 2004. All sources are Fermi Blazars. Our purpose is to investigate flux and spectral variability at short and long time scales. Systematic monitoring, independent of the activity of the source, guarantees high statistics, and allows to draw an unbiased view of different activity states on weekly/daily time scales for the whole timeframe, and on nightly timescales for some epochs. Data were obtained with the REM telescope located at the ESO premises of La Silla (Chile). Light curves were gathered in the optical/near-infrared VRIJHK bands from 2005 April to 2012 June. Variability >~3mag is observed in PKS 0537-441, PKS 1510-089 and PKS 2155-304, the largest ranges spanned in the near-infrared. The color intensity plots show rather different morphologies. The spectral energy distributions in general are well fitted by a power law, with some deviations which are more apparent in low states. Some variability episodes during a night interval are well documented for PKS 0537-441 and PKS 2155-304. For the latter source the variability time scale implies a large relativistic beaming factor.2014A&A...562A..79Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/562/A79CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/722/520 : Gamma-ray light curves of Fermi blazars (Abdo+, 2010)J/A+AS/129/569 : BVRI photometry of OJ 287 (Jia Guibin+ 1998)J/AJ/132/1256 : eim BATC photometry of OJ 287 (Wu+, 2006)J/MNRAS/385/823 : UBVRI light curves of OJ 287 (Zheng+, 2008)J/MNRAS/402/2087 : Optical polarization of OJ 287 (Villforth+, 2010)J/AJ/141/65 : BATC ceimo light curves of OJ 287 (Dai+, 2011)J/MNRAS/421/1861 : OJ287 polarization and VLBI jet direction (Valtonen+, 2012)J/ApJS/192/12 : Photometry of the blazar PKS 0537-441 (Impiombato+, 2011)J/A+A/469/503 : VRIJHK observations of PKS 2155-304 (Dolcini+, 2007)J/A+A/531/A123 : Optical light curve of PKS 2155-304 (Kastendieck+, 2011)J/A+A/539/A149 : Multiwavelength view of PKS 2155-304 (Abramowski+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/562/A79https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/562/A79http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/562/A79https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/562/A79https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/562/A79http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/562/A79GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/562/A79/table1 (Blazars sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/562/A79/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/562/A79/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/562/A79/table1?GETtext/xml+votable180.050000true84.7097917-44.08584720.0055555555555555566/4695 4770 22784 28492 34123 47014 47375https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/562/A79?format=asciiOpticalInfrareddefaultJ/A+A/562/A79/table1Blazars sampleSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource namemeta.id;meta.maincharprimaryRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainClassOptical class from Massaro et al., 2012, Multifrequency Catalogue of Blazars (3rd Edition) (ARACNE Ed.)src.classcharSEDSED class (1)meta.code.classcharzRedshift from SIMBADsrc.redshiftfloatTeV?[Y:] TeV source (2)meta.codecharRef[a-e] Reference (3)meta.ref;pos.framecharLCShow the light curvesmeta.ref.urlcharNEDSimbad column added by the CDSmeta.ref.urlcharJ/A+A/562/A79/photomPhotometry related to the light curves in Fig.2recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource namemeta.id;meta.maincharFilt[VRIJHK] Filtermeta.id;instr.filtercharMJDModified Julian Date of observationdtime.epochintmagMagnitude in Filt (1)magphot.magfloate_magMagnitude errormagstat.error;phot.magfloat