J/ApJS/260/47ivo://CDS.VizieR/J/ApJS/260/47doi:10.26093/cds/vizier.22600047CDSCai J.T.Kurtanidze S.O.Liu Y.Kurtanidze O.M.Nikolashvili M.G.,Xiao H.B.Fan J.H.2022-10-14T13:54:48Z2022-09-08T14:21:23ZCDS support team

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

cds-question@unistra.frbl-lacertae-objectsinfrared-photometryvisible-astronomyphotometryVariability is one of the main observational characteristics of blazars. Studying variability is an efficient method to reveal the nature of active galactic nuclei. In the present work, we report optical R-band photometry observations of a TeV blazar, 1ES2344+514, carried out with a 70cm telescope in the period of 1998-July to 2017-November at Abastumani Observatory, Georgia. Based on the optical R-band observations, the optical variation behaviors on both short timescales and long timescales are investigated. Three methods (Jurkevich, discrete correlation function, and power spectrum analysis) are used to investigate periodicity in the light curve. In addition, combined with multiwavelength data, the jet physical properties are discussed. The following conclusions are drawn: (1) A variability of {Delta}R=0.155mag (15.356-15.201mag) over a timescale of {Delta}T=12.99min is detected during our 628d of monitoring. (2) According to the Kelvin-Helmholtz thermal instability, if the magnetic field intensity (B) for the source is greater than a critical value (B_c_), it will reduce the incidence of intraday variations in the light curves. (3) The physical parameters of the dissipation region are obtained by fitting the spectral energy distribution with a one-zone synchrotron self-Compton model for the average and flare states. (4) The three methods show that there are periods of P=2.72+/-0.47yr, P=1.61+/-0.18yr, P=1.31+/-0.17yr, and P=1.05+/-0.07yr. When a binary black hole system is adopted with a period of P=2.72+/-0.41yr, we obtain the orbital parameters for the binary black hole system as follows: M=8.08x10^9^M_{sun}_, the sum of the semiaxes is r=7.18x10^16^cm, and the lifetime of the binary black hole is {tau}_merge_=6.24x10^2^yr.2022ApJS..260...47Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/260/47CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJ/537/101 : Optical Study for blazars. I. (Fan+, 2000)J/A+A/402/151 : S5 0716+714 UBVRI photometry (Raiteri+, 2003)J/A+A/445/441 : SED of BL Lacertae objects (Nieppola+, 2006)J/ApJ/716/30 : SED of Fermi bright blazars (Abdo+, 2010)J/ApJS/199/31 : Fermi LAT second source catalog (2FGL) (Nolan+, 2012)J/AJ/143/13 : Light curves of AL Gem and BM Mon (Yang+, 2012)J/other/RAA/14.1135 : Doppler factor for a Fermi blazar sample (Fan+, 2014)J/other/Nat/515.376 : Power of relativistic jets in blazars (Ghisellini+, 2014)J/ApJ/810/14 : 3rd cat. of LAT-detected AGNs (3LAC) (Ackermann+, 2015)J/ApJS/226/20 : X-ray, opt. & radio SEDs of Fermi blazars (Fan+, 2016)J/ApJ/837/45 : 2006-2012 Rc-band & 4.8GHz obs. of AO 0235+164 (Fan+, 2017)J/ApJ/835/L38 : Fermi blazars with Doppler factors (Fan+, 2017)J/ApJS/229/21 : VRI monitoring of the QSO 3C 273 in 2005-2016 (Xiong+, 2017)J/ApJS/235/39 : Jet properties of {gamma}-ray-loud 3FGL AGNs (Chen, 2018)J/AJ/155/90 : 1996-2009 opt. photometric monitoring for 3C 66A (Fan+, 2018)J/ApJ/866/137 : Bright blazars variability brightness temp. (Liodakis+, 2018)J/ApJS/247/33 : The Fermi LAT fourth source catalog (4FGL) (Abdollahi+, 2020)J/ApJS/253/10 : 12yrs of R-band photometry of the quasar 3C 454.3 (Fan+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/260/47https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/260/47http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/260/47https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/260/47https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/260/47http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/260/47GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/ApJS/260/47/table2Observational data for 1ES 2344+514recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJD[0.429/7062.22] Julian Date; JD-2451021dtime.epochdoubleRmag[14.26/14.54] Apparent R band magnitudemagphot.mag;em.opt.Rfloate_Rmag[0.0003/0.09] Uncertainty in Rmagmagstat.error;phot.magfloat