J/A+A/620/A185ivo://CDS.VizieR/J/A+A/620/A185doi:10.26093/cds/vizier.36200185CDSNilsson K.Lindfors E.Takalo L.O.Reinthal R.Berdyugin A.,Sillanpaeae A.Ciprini S.Halkola A.Heinaemaeki P.Hovatta T.,Kadenius V.Nurmi P.Ostorero L.Pasanen M.Rekola R.Saarinen J.,Sainio J.Tuominen T.Villforth C.Vornanen T.Zaprudin B.2019-01-09T08:06:12Z2018-12-17T11:47:16ZCDS support team

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

cds-question@unistra.frbl-lacertae-objectsccd-photometryWe present ten years of R-band monitoring data of 31 northern blazars which were either detected at very high-energy (VHE) gamma rays or listed as potential VHE gamma-ray emitters. The data comprise 11820 photometric data points in the R-band obtained in 2002-2012. We analyzed the light curves by determining their power spectral density (PSD) slopes assuming a power-law dependence with a single slope beta and a Gaussian probability density function (PDF). We used the multiple fragments variance function (MFVF) combined with a forward-casting approach and likelihood analysis to determine the slopes and perform extensive simulations to estimate the uncertainties of the derived slopes. We also looked for periodic variations via Fourier analysis and quantified the false alarm probability through a large number of simulations. Comparing the obtained PSD slopes to values in the literature, we find the slopes in the radio band to be steeper than those in the optical and gamma rays. Our periodicity search yielded one target, Mrk 421, with a significant (p<5%) period. Finding one significant period among 31 targets is consistent with the expected false alarm rate, but the period found in Mrk 421 is very strong and deserves further consideration.2018A&A...620A.185Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/620/A185CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/274 : The Roma BZCAT - 5th edition (Massaro+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/620/A185https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/620/A185http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/620/A185https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/620/A185https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/620/A185http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/620/A185GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/620/A185/table1 (Main properties of the targets and observing log)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/620/A185/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/620/A185/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/620/A185/table1?GETtext/xml+votable180.050000true8.96897559.83449720.0055555555555555566/2273 2295 2414 2549 3023 4695 5423 6018 6021 6647 7518 7548 7896 8915 8945 9612 9711 10605 12231 13820 13927 15969 24027 26131 28352 28492 28517 31663 44908 47014https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/620/A185?format=asciidefaultJ/A+A/620/A185/table1Main properties of the targets and observing logSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_Target[*] Note on Name (1)meta.notecharTargetTarget namemeta.id;meta.maincharz? Redshiftsrc.redshiftfloatnullableTypeBroadband type (2)src.classcharTeV[y-] is the target detected at TeV energies?meta.codecharARGalactic extinction in the R-band, obtained from the NEDmagphys.absorption.galfloatNfrmsNumber of CCD framesmeta.numberintNobsNumber of data pointsmeta.numberintRefReferences to papers where parts of these data have been used before, in refs.dat filemeta.refcharLCShow the R-band light Curvesmeta.ref.urlcharFileNameName of the file with light data in subdirectory lcmeta.id;phys.composition.massLightRatio;meta.filechar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/A+A/620/A185/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference numbermeta.id;meta.mainintBibCodeBibCodemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorcharComCommentsmeta.notechar