J/ApJS/213/26ivo://CDS.VizieR/J/ApJS/213/26doi:10.26093/cds/vizier.22130026CDSFan J.H.Kurtanidze O.Liu Y.Richter G.M.Chanishvili R.Yuan Y.H.2017-07-04T07:08:55Z2014-10-08T13:55:46ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleiinfrared-photometryvisible-astronomybroad-band-photometryquasarsVariability is one of the most observable characteristics of active galactic nuclei, and it is important when considering the emission mechanism. In this paper, we report optical photometry monitoring of two nearby brightest quasars, PHL 1811 and 3C 273, using the ST-6 camera attached to the Newtonian focus and the Ap6E CCD camera attached to the primary focus of the 70cm meniscus telescope at the Abastumani Observatory, Georgia. PHL 1811 was monitored during the period from 2002 September to 2012 December, while 3C 273 was monitored during the period from 1998 February to 2008 May. During our monitoring period, the two sources did not show any significant intra-day variability. The largest detected variations are {Delta}R=0.112+/-0.010mag. for PHL 1811, {Delta}B=0.595+/-0.099mag, {Delta}V=0.369+/-0.028mag, {Delta}R=0.495+/-0.076mag, and {Delta}I=0.355+/-0.009mag for 3C 273. When the periodicity analysis methods are adopted for the observations of the sources, a period of p=5.80+/-1.12yr is obtained for PHL 1811 in the R light curve in the present work, and periods of p=21.10+/-0.14, 10.00+/-0.14, 7.30+/-0.09, 13.20+/-0.09, 2.10+/-0.06, and 0.68+/-0.05yr are obtained for 3C 273 based on the data in the present work combined with historical works.2014ApJS..213...26Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/213/26CatalogResearchIsServedByTAP VizieR generic servicerelated-toVII/258 : Quasars and Active Galactic Nuclei (13th Ed.) (Veron+ 2010)J/A+A/537/A99 : Large Quasar Astrometric Catalogue 2 (LQAC-2) (Souchay+, 2012)J/ApJ/730/19 : IR spectra and SEDs for starbursts and AGNs (Sargsyan+, 2011)J/ApJS/193/28 : Galaxy survey around 20 UV-bright quasars (Prochaska+, 2011)J/ApJ/716/30 : SED of Fermi bright blazars (Abdo+, 2010)J/ApJ/698/895 : Variations in QSOs optical flux (Kelly+, 2009)J/A+A/495/691 : Multifrequency cat. of blazars, Roma-BZCAT (Massaro+, 2009)J/MNRAS/392/1181 : BV(RI)c photometry of 3C 273 (Dai+, 2009)J/ApJ/679/194 : Low-z intergalactic medium. III. (Danforth+, 2008)J/AJ/134/799 : Multiwaveband polarimetry of 15 AGN (Jorstad+, 2007)J/A+A/436/799 : X- & gamma-ray fluxes of {gamma}-ray-loud blazars (Fan+, 2005)J/ApJ/522/846 : Optical monitoring of GeV loud blazars (Xie+, 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/213/26https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/213/26http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/213/26https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/213/26https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/213/26http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/213/26GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap2.367228618189496e-19 4.920466254354166e-19OpticalInfrareddefaultJ/ApJS/213/26/table1Observational data (R) for PHL 1811recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian Date of observationdtime.epochdoubleRmag[0.96/1.08] Differential R band magnitude (1)magphot.mag;arith.difffloate_Rmag[0.001/0.04] The 1{sigma} uncertainty in Rmagmagstat.error;phot.mag;em.opt.RfloatJ/ApJS/213/26/table3Observational data (BVRI) for 3C273recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJD.B? Julian Date of B band observationdtime.epochdoublenullableBmag[12.7/13.3]? The B band magnitudemagphot.mag;em.opt.Bfloatnullablee_Bmag[0/0.1]? The 1{sigma} uncertainty in Bmagmagstat.error;phot.mag;em.opt.BfloatnullableJD.V? Julian Date of V band observationdtime.epochdoublenullableVmag[12.5/13]? The V band magnitudemagphot.mag;em.opt.Vfloatnullablee_Vmag[0/0.09]? The 1{sigma} uncertainty in Vmagmagstat.error;phot.mag;em.opt.VfloatnullableJD.RJulian Date of Rc band observationdtime.epochdoubleRcmag[12.2/12.8] The Rc band magnitudemagphot.mag;em.opt.Rfloate_Rcmag[0/0.07] The 1{sigma} uncertainty in Rcmagmagstat.error;phot.mag;em.opt.RfloatJD.I? Julian Date of Ic band observationdtime.epochdoublenullableIcmag[11.8/12.2]? The Ic band magnitudemagphot.mag;em.opt.Ifloatnullablee_Icmag[0.001/0.06]? The 1{sigma} uncertainty in Icmagmagstat.error;phot.mag;em.opt.Ifloatnullable