J/ApJS/263/16ivo://CDS.VizieR/J/ApJS/263/16doi:10.26093/cds/vizier.22630016CDSKuzmicz A.Goyal A.Zola S.Jamrozy M.Drozdz M.Ogloza W.Siwak M.,Reichart D.E.Kouprianov V.V.Caton D.B.2023-09-27T06:38:35Z2022-11-30T13:07:05ZCDS support team

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

cds-question@unistra.frquasarsphotometryvisible-astronomyredshiftedradio-sourcesWe characterize the optical variability properties of eight lobe-dominated radio quasars (QSOs): B2 0709+37, FBQS J095206.3+235245, PG 1004+130, [HB89] 1156+631, [HB89] 1425+267, [HB89] 1503+691, [HB89] 1721+343, and 4C +74.26, systematically monitored for a duration of 13yr since 2009. The quasars are radio-loud objects with extended radio lobes that indicate their orientation close to the sky plane. Five of the eight QSOs are classified as giant radio quasars. All quasars showed variability during our monitoring, with magnitude variations between 0.3 and 1mag for the least variable and the most variable QSOs, respectively. We performed both structure function (SF) analysis and power spectral density (PSD) analysis for the variability characterization and search for characteristic timescales and periodicities. As a result of our analysis, we obtained relatively steep SF slopes ({alpha} ranging from 0.49 to 0.75) that are consistent with the derived PSD slopes (~2-3). All the PSDs show a good fit to single power-law forms, indicating a red-noise character of variability between timescales of ~13yr and weeks. We did not measure reliable characteristic timescales of variability from the SF analysis, which indicates that the duration of the gathered data is too short to reveal them. The absence of bends in the PSDs (change of slope from >=1 to ~0) on longer timescales indicates that optical variations are most likely caused by thermal instabilities in the accretion disk.2022ApJS..263...16Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/263/16CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)J/ApJS/126/133 : The FIRST bright quasar survey. II. (White+, 2000)J/AJ/121/1872 : FIRST radio-selected QSOs (Helfand+, 2001)J/MNRAS/375/989 : Quasar variability (Wold+, 2007)J/ApJ/698/895 : Variations in QSOs optical flux (Kelly+, 2009)J/ApJ/728/26 : QSO selection based on phot. variability (Macleod+, 2011)J/MNRAS/426/851 : Giant Radio Quasars properties (Kuzmicz+, 2012)J/ApJ/753/106 : Quasar variability with SDSS & POSS imaging (MacLeod+, 2012)J/A+A/620/A185 : Long-term optical monitoring of TeV Blazars (Nilsson+, 2018)J/A+A/642/A153 : SAGAN. I. New sample & multi-wavelength data (Dabhade+, 2020)J/ApJS/253/25 : Giant radio quasars from SDSS, FIRST & NVSS (Kuzmicz+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/263/16https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/263/16http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/263/16https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/263/16https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/263/16http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/263/16GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/263/16/table1 (properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/263/16/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/263/16/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/263/16/table1?GETtext/xml+votable180.050000true108.289536.93519440.0055555555555555566/4568 6111 6379 8927 9490 12038 16184 275802.85864675833786e-19 3.5010283109654867e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/263/16?format=asciiOpticalRadiodefaultJ/ApJS/263/16/table1propertiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameQuasar identifiermeta.id;meta.maincharprimaryRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainz[0.1/0.97] Spectroscopic redshiftsrc.redshiftfloatDist[0.38/1.21] Projected linear size of radio structure (1)Mpcpos.distancefloatSimbadNameSimbad column added by the CDSmeta.idcharnullableNEDNED column added by the CDSmeta.ref.urlcharrmag[14.46/17.78] r-band SDSS magnitude (2)magphot.mag;em.opt.Rfloatf_rmagFlag on rmagmeta.codecharInc[45/90] Inclination angle (3)degsrc.orbital.inclination;pos.posAngintlogLtot[25.67/27.03] Total radio luminosity at 1.4GHz (4)W/Hzphys.luminosity;em.radio.750-1500MHzfloatlogLc[24.38/26.64] Core radio luminosity at 1.4GHz (4)W/Hzphys.luminosity;em.radio.750-1500MHzfloatRefReference for source selection (5)meta.ref;pos.framecharCatDisplay data from NVSS (VIII/65) and FBQS (White+, 2000, J/ApJS/126/133) within 3"meta.ref.urlintnullableNpNumber of differential magnitude measurements for this quasar (link to Table B1)meta.numberintnullableLCInteractive LC Plotmeta.ref.urlcharJ/ApJS/263/16/tableb1Differential R-band magnitude light curves for studied quasars; table updated by the authorrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintV-C[-0.46/2.94] Differential R-band magnitude (1)magphot.mag;arith.diff;em.opt.Rfloate_V-C[0.004/0.3] Uncertainty in V-Cmagstat.errorfloatC-C1[-0.78/0.73] Differential R-band magnitude (2)magphot.mag;arith.diff;em.opt.Rfloate_C-C1[0.001/0.2] Uncertainty in C-C1magstat.errorfloatTelTelescope code (3)meta.code;instr.telcharNameQuasar identifiermeta.id;meta.maincharHJDHeliocentric Julian Datedtime.epochdouble