J/A+A/555/A2ivo://CDS.VizieR/J/A+A/555/A2doi:10.26093/cds/vizier.35550002CDSNesci R.Tosti G.Pursimo T.Ojha R.Kadler M.2017-10-18T08:25:12Z2013-06-18T11:23:04ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleibl-lacertae-objectsinfrared-photometrySpectral energy distribution and its variability are basic tools for understanding the physical processes operating in active galactic nuclei (AGN). In this paper we report the results of a one-year near infra red (NIR) and optical monitoring of a sample of 22 AGN known to be {gamma}-ray emitters, aimed at discovering correlations between optical and {gamma}-ray emission. We observed our objects with the Rapid Eye Mount (REM) telescope in J, H, K, and R bands nearly twice every month during their visibility window and derived light curves and spectral indexes. We also analyzed the {gamma}-ray data from the Fermi {gamma}-ray Space Telescope, making weekly averages.2013A&A...555A...2Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/555/A2CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/188/405 : Fermi-LAT first source catalog (1FGL) (Abdo+, 2010)J/ApJ/743/171 : The 2LAC catalog (Ackermann+, 2011)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/555/A2https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/555/A2http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/555/A2https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/555/A2https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/555/A2http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/555/A2GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/555/A2/sources (List of studied sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/555/A2/sources?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/555/A2/sources?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/555/A2/sources?GETtext/xml+votable180.050000true32.6925417-51.01719440.0055555555555555566/24608 34013 34123 34209 34264 34461 34517 34528 35079 37385 37529 39658 43366 43380 46740 47014 47375 475401.398457827073138e-19 1.7798557115773645e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/555/A2?format=asciiInfrareddefaultJ/A+A/555/A2/sourcesList of studied sourcesNameSource name (HHMM+DDd, B1950)meta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Simbad Hour of Right Ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Simbad Degree of Declination (J2000.0)pos.eq.dec;meta.mainClass2LAC classificationsrc.classcharSNameSimbad namemeta.idcharLCPlot the light curvemeta.ref.urlcharSimbadSimbad column added by the CDSmeta.refcharNEDSimbad column added by the CDSmeta.refcharJ/A+A/555/A2/photomJ-band (1.2{mu}m) photometric datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource namemeta.id;meta.maincharMJDModified Julian date of the observationdtime.epochdoubleJmagJ magnitude (1)magphot.mag;em.IR.Jfloate_Jmagrms uncertainty on Jmagmagstat.error;phot.mag;em.IR.Jfloat