J/MNRAS/474/4396ivo://CDS.VizieR/J/MNRAS/474/4396doi:10.26093/cds/vizier.74744396CDSKoay J.Y.Macquart J.-P.Jauncey D.L.Pursimo T.Giroletti M.,Bignall H.E.Lovell J.E.J.Rickett B.J.Kedziora-Chudczer L.Ojha R.,Reynolds C.2024-08-18T20:17:32Z2021-04-19T12:38:13ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleiquasarsradio-sourcesWe investigate the relationship between 5GHz interstellar scintillation (ISS) and 15GHz intrinsic variability of compact, radio-selected active galactic nuclei (AGNs) drawn from the Microarcsecond Scintillation-Induced Variability (MASIV) Survey and the Owens Valley Radio Observatory blazar monitoring program. We discover that the strongest scintillators at 5GHz (modulation index, m_5_>=0.02) all exhibit strong 15GHz intrinsic variability (m_15_>=0.1). This relationship can be attributed mainly to the mutual dependence of intrinsic variability and ISS amplitudes on radio core compactness at ~100{mu}s scales, and to a lesser extent, on their mutual dependences on source flux density, arcsec-scale core dominance and redshift. However, not all sources displaying strong intrinsic variations show high amplitude scintillation, since ISS is also strongly dependent on Galactic line-of-sight scattering properties. This observed relationship between intrinsic variability and ISS highlights the importance of optimizing the observing frequency, cadence, timespan and sky coverage of future radio variability surveys, such that these two effects can be better distinguished to study the underlying physics. For the full MASIV sample, we find that Fermi-detected gamma-ray loud sources exhibit significantly higher 5GHz ISS amplitudes than gamma-ray quiet sources. This relationship is weaker than the known correlation between gamma-ray loudness and the 15GHz variability amplitudes, most likely due to jet opacity effects.2018MNRAS.474.4396Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/474/4396CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/249 : WHAM Northern Sky Survey, V-1.1 (Haffner+, 2003)J/MNRAS/438/3058 : 15GHz variability of {gamma}-ray blazars (Richards+, 2014)J/MNRAS/452/4274 : Angular sizes of AGN cores at 2-43GHz (Pushkarev+, 2015)J/ApJ/689/108 : MASIV survey. II. First four epochs (Lovell+, 2008)J/ApJ/767/14 : MASIV survey, III. Optical identifications (Pursimo+, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/474/4396https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/474/4396http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/474/4396https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/474/4396https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/474/4396http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/474/4396GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/474/4396/table1 (List of common sources found in both the MASIV sample and the OVRO 15 GHz blazar monitoring program (Richards et al. 2014MNRAS.438.3058R), their intrinsic properties, and variability characteristics)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/474/4396/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/474/4396/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/474/4396/table1?GETtext/xml+votable180.050000true1.488230838.33754140.0055555555555555566/47 110 180 304 556 579 700 911 1154 1250 1584 1701 1875 2087 2098 2124 2214 2397 2531 2631 2710 2836 2854 3886 4027 4436 4446 4572 4695-4696 4754 4770 4820 5163 5353 5423 5448 5693 5817 5848 6164 6252 6507 6641 6686 6716 6790 6853 6996 7030 7129 7235 7346 7389 7570 7623 7653 7709 7911 7937 8031 8057 8112 8199 8717 8773 8805 8830 9016 9204 9248 9403 9442 9460 9536 9545 9588 9632-9633 9676 9681 9688 9723 9813 10163 10249 10321 10352 10422 10435 10524 10548 10983 11216 11279 11430 11640 11845 12301 12352 12444 12475 12619 12851 13352 13410 13578 13731 13792 14842 15819 15936 15947 16049 16113 16170 16281 16298 17791 18035 18214 18378 18875 19189-19190 19217 19593 19629 19743 19872 19890 20099 20146 20468 21885 21935 21960 21968 21972 22363 22375 22396 23014-23015 23306 23478 23563 24084 24099 24123 26303 26550 27310 27423 27523 27583 27595 28383 28454 28479 28492 31154 31190 31211 31229 31391 31430 31451 31529 31664 31745 31857 31894 32035 32247 32311 32325 327643.313034785154005e-24 9.939104355462015e-24https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/474/4396?format=asciiRadiodefaultJ/MNRAS/474/4396/table1List of common sources found in both the MASIV sample and the OVRO 15 GHz blazar monitoring program (Richards et al. 2014MNRAS.438.3058R), their intrinsic properties, and variability characteristicsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName (JHHMM+DDMM, J2000), CGRaBS JHHMM+DDMM in Simbadmeta.id;meta.maincharm55GHz modulation index (1)src.var.index;em.radio.3-6GHzfloate_m5Error in m5 (1)stat.errorfloatNepNumber of epochs variable in the MASIV survey (1)meta.numberintF5GHz5GHz flux density (1)Jyphot.flux.density;em.radio.3-6GHzfloatm1515GHz modulation index (2)src.var.index;em.radio.12-30GHzfloatE_m15Upper error in m15 (2)stat.error;stat.maxfloate_m15Lower error in m15 (2)stat.errorfloatS15GHz15GHz flux density (2)Jyphot.flux.density;em.radio.12-30GHzfloatIHaHalpha intensity (Rayleighs) (3)Ryspect.line.intensityfloatzRedshift (4)src.redshiftfloattheta2? 2GHz core size (5)masphys.angSize;em.radio.1500-3000MHzfloatnullabletheta5? 5GHz core size (5)masphys.angSize;em.radio.3-6GHzfloatnullabletheta8? 8GHz core size (5)masphys.angSize;em.radio.6-12GHzfloatnullabletheta15? 15GHz core size (5)masphys.angSize;em.radio.12-30GHzfloatnullabletheta24? 24GHz core size (5)masphys.angSize;em.radio.12-30GHzfloatnullabletheta43? 43GHz core size (5)masphys.angSize;em.mm.30-50GHzfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlchar_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.main