Bright blazars variability brightness temp. J/ApJ/866/137 ivo://CDS.VizieR/J/ApJ/866/137 doi:10.26093/cds/vizier.18660137 CDS Liodakis I. Hovatta T. Huppenkothen D. Kiehlmann S. Max-Moerbeck W.,ReadheadA A.C.S. 2020-01-13T12:50:56Z 2018-11-05T09:26:59Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr bl-lacertae-objects active-galactic-nuclei quasars Relativistic effects dominate the emission of blazar jets complicating our understanding of their intrinsic properties. Although many methods have been proposed to account for them, the variability Doppler factor method has been shown to describe the blazar populations best. We use a Bayesian hierarchical code called Magnetron to model the light curves of 973 sources observed by the Owens Valley Radio Observatory's 40-m telescope as a series of flares with an exponential rise and decay, and estimate their variability brightness temperature. Our analysis allows us to place the most stringent constraints on the equipartition brightness temperature i.e., the maximum achieved intrinsic brightness temperature in beamed sources which we found to be <T_{eq}>=2.78x10^11^K+/-26%. Using our findings we estimated the variability Doppler factor for the largest sample of blazars increasing the number of available estimates in the literature by almost an order of magnitude. Our results clearly show that {gamma}-ray loud sources have faster and higher amplitude flares than {gamma}-ray quiet sources. As a consequence they show higher variability brightness temperatures and thus are more relativistically beamed, with all of the above suggesting a strong connection between the radio flaring properties of the jet and {gamma}-ray emission. 2018ApJ...866..137L https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/866/137 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to J/AJ/152/12 : MOJAVE. XIII. New 15GHz observations on 1994-2013 (Lister+, 2016) http://www.astro.caltech.edu/ovroblazars : OVRO 40m Telescope Home Page https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/866/137 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/866/137 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/866/137 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/866/137 https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/866/137 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/866/137 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/ApJ/866/137/table2 (Variability brightness temperatures and beaming properties for the sources in our sample (T_var_ and delta_var_ for bright blazars)) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/866/137/table2? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/866/137/table2? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/866/137/table2? GET text/xml+votable 180.0 50000 true 3.3797083 40.8603178 0.005555555555555556 Cone search capability for table J/ApJ/866/137/table3 (Variability brightness temperatures and beaming properties for the sources in our sample without a redshift estimate (Tvar and deltavar for bright blazars)) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/866/137/table3? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/866/137/table3? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/866/137/table3? 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30928 30997 31002 31079 31145 31154 31176 31190 31211 31276 31334 31355 31391 31399 31407 31430 31451 31485 31508 31520 31529 31539 31555 31559 31566 31574 31599 31656 31663 31664 31666 31711 31745 31757 31773 31844 31875 31894 31915 31930 31986 31991 31995 32034 32035 32068 32136 32160 32163 32231 32247 32261 32289 32311 32325 32374 32539 32546 32581 32614 32660 32674 32687 32691 32738 32764 36188 36283 36295 36333 36459 36460 36531 36551 36554 36558 36580 36602 36655 36708 36785 36840 40392 40412 40434 40533 40635 40658 40703 40730 40762 40766 40784 40798 40811 40831 40874 40885 44526 44649 44661 44669 44714 44729 44730 44742 44776 44791 44805 44815 44899 44908 45011 48582 48589 48595 48610 48629 48729 48798 48805 48814 48846 48878 48883 48965 48985 48995 49037 49071 49083 49084 https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/866/137?format=ascii default J/ApJ/866/137/table2 Variability brightness temperatures and beaming properties for the sources in our sample (T_var_ and delta_var_ for bright blazars) SimbadName Simbad column added by the CDS meta.id char z Redshift (1) src.redshift float Class [FBG-] Class (G2) meta.code.class char recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int Name OVRO name (G1) meta.id;meta.main char betaappmax ? Maximum apparent velocity phys.veloc float nullable e_betaappmax ? rms uncertainty on betaappmax stat.error float nullable Tvar Variability brightness temperature, T_var_ K src.var float e_Tvar Error on Tvar (lower value) K stat.error float E_Tvar Error on Tvar (upper value) K stat.error;stat.max float deltavar Variability Doppler factor, {delta}_var_ spect.dopplerParam float e_deltavar Error on deltavar (lower value) stat.error float E_deltavar Error on deltavar (upper value) stat.error;stat.max float Gammavar ? Lorentz factor, {Gamma}_var_ stat.fit.param float nullable b_Gammavar Minimum Lorentz factor, {Gamma}_var_ (2) arith.factor;stat.min float l_B_Gammavar [>] Limit flag on Gammavarmax meta.code.error char B_Gammavar Maximum Lorentz factor, {Gamma}_var_ (2) arith.factor;stat.max float thetavar ? Viewing angle, {theta}_var_ deg src.orbital.inclination float nullable b_thetavar Minimum viewing angle, {theta}_var_ (2) deg pos.posAng;stat.min float B_thetavar Maximum viewing angle, {theta}_var_ (2) deg pos.posAng;stat.max float _RA Positions from OVRO website (right ascension part) deg pos.eq.ra;meta.main _DE Positions from OVRO website (declination part) deg pos.eq.dec;meta.main
J/ApJ/866/137/table3 Variability brightness temperatures and beaming properties for the sources in our sample without a redshift estimate (Tvar and deltavar for bright blazars) SimbadName Simbad column added by the CDS meta.id char recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int Name OVRO name (G1) meta.id;meta.main char Class [BG-] Class (G2) meta.code.class char Tvar Variability brightness temperature (no cosmological correction), T_var_ (3) K src.var float b_Tvar Minimum Tvar (4) K src.var;stat.min float B_Tvar Maximum Tvar (4) K src.var;stat.max float b_deltavar Minimum variability Doppler factor, {delta}_var_ spect.dopplerParam float B_deltavar Maximum variability Doppler factor, {delta}_var_ spect.dopplerParam float b_Gammavar Minimum Lorentz factor, {Gamma}_var_ arith.factor;stat.min float l_B_Gammavar [>] Limit flag on Gammavarmax meta.code.error char B_Gammavar [100] Maximum Lorentz factor, {Gamma}_var_ arith.factor;stat.max int b_thetavar [0.0] Minimum viewing angle, {theta}_var_ deg pos.posAng;stat.min float B_thetavar Maximum viewing angle, {theta}_var_ deg pos.posAng;stat.max float _RA Positions from OVRO website (right ascension part) deg pos.eq.ra;meta.main _DE Positions from OVRO website (declination part) deg pos.eq.dec;meta.main