J/ApJ/722/L7ivo://CDS.VizieR/J/ApJ/722/L7doi:10.26093/cds/vizier.17229007CDSPushkarev A.B.Kovalev Y.Y.Lister M.L.2017-11-10T11:15:51Z2012-08-09T11:34:26ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleigamma-ray-astronomyradio-continuum-emissionredshiftedWe report the detection of a non-zero time delay between radio emission measured by the VLBA at 15.4GHz and {gamma}-ray radiation ({gamma}-ray leads radio) registered by the Large Area Telescope (LAT) on board the Fermi Gamma-Ray Space Telescope for a sample of 183 radio and {gamma}-ray bright active galactic nuclei. For the correlation analysis, we used 0.1-100GeV {gamma}-ray photon fluxes, taken from monthly binned measurements from the first Fermi LAT catalog (1FGL; Abdo et al. 2010, Cat. J/ApJS/188/405), and 15.4GHz radio flux densities from the MOJAVE VLBA program (Lister et al. 2009, Cat. J/AJ/137/3718). The correlation is most pronounced if the core flux density is used, strongly indicating that the {gamma}-ray emission is generated within the compact region of the 15GHz VLBA core. Determining the Pearson's r and Kendall's {tau} correlation coefficients for different time lags, we find that for the majority of sources the radio/{gamma}-ray delay ranges from 1 to 8 months in the observer's frame and peaks at approximately 1.2 months in the source's frame. We interpret the primary source of the time delay to be synchrotron opacity in the nuclear region.2010ApJ...722L...7Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/722/L7CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/258 : Quasars and Active Galactic Nuclei (13th Ed.) (Veron+ 2010)J/ApJ/715/429 : First Fermi-LAT AGN catalog (1LAC) (Abdo+, 2010)J/ApJS/188/405 : Fermi-LAT first source catalog (1FGL) (Abdo+, 2010)J/ApJ/700/597 : FERMI LAT detected blazars (Abdo+, 2009)J/AJ/137/3718 : 15GHz monitoring of AGN jets with VLBA (Lister+, 2009)J/ApJ/707/L56 : VLBI and bright Fermi/LAT sources (Kovalev, 2009)J/ApJS/175/97 : CGRaBS: {gamma}-ray blazar candidates (Healey+, 2008)http://pos.sissa.it/cgi-bin/reader/conf.cgi?confid=72 : 9th European VLBIhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/722/L7https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/722/L7http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/722/L7https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/722/L7https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/722/L7http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/722/L7GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/722/L7/table1 (LAT-detected MOJAVE AGNs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/722/L7/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/722/L7/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/722/L7/table1?GETtext/xml+votable180.050000true1.488230838.33754140.0055555555555555566/18 556 579 911 1085 1263 1509 1701 2122 2143 2228 2414 2836 3024 3096 3784 3886 3951 4285 4572 4695 4770 4820 5423 5817 6018 6088 6368 6507 6777 6822 6948 7045 7389 7446 7570 7896 7969 8299 8466 8515 8915 9075 9442 9460 9545 9570 9612 9676 10249 10422 10681 11045 11153 11631 11639 12241 12604 12619 13156 13352 13410 13485 13582 13820 13927 14854 15067 15286 15969 16027 16059 16298 16720 17184 17186 17364 17414 17541 17579 17857 17917 17927 18035 18457 18624 18661 18718 19088 19190 19370 19398 19593 19622 19831 20099 20468 20935 21121 21266 21358 21564 21758 21768 21935 21960 21968 21972 22271 22363 22396 22501 22658 22917 22950 23015 23099 23121 23127 23416 23691 23897 24084 24260 24845 25196 25302 25630 25649 25818 25864 26131 26292 26303 26340 26898 27060 27243 27310 27433 27765 28083 28479 28492 28517 29016 29017 29570 29772 30446 31190 31430 31451 31663 31664 31894 32311 34675 35706 35786 36058 36090 36151 36188 36554 40479 40762 40766 42901 42980 44147 44247 44730 44908 45011 46963 46964 48023 48123 48595 48798 49071https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/722/L7?format=asciiGamma-rayOpticalRadiodefaultJ/ApJ/722/L7/table1LAT-detected MOJAVE AGNsz? Redshiftsrc.redshiftfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVLBIIAU name (HHMM-DDd; B1950) of VLBI association (<IERS BHHMM+DDd> or <IVS BHHMM+DDd> in Simbad)meta.id.assoccharANameAlternative namemeta.id;meta.mainchar1FGLFirst Fermi LAT catalog name (JHHMM.m+DDMM)meta.id;meta.maincharr_zRedshift bibcode's referencemeta.ref;pos.framecharAuthRedshift author's referencemeta.bib.authorcharCatRedshift catalog's referencemeta.notecharXNumber of matches with 1LAC (J/ApJ/715/429/table1) and MOJAVE (J/AJ/137/3718/table1) catalogs within 3"meta.ref.urlintnullableSimbadSimbad column added by the CDSmeta.refcharNEDSimbad column added by the CDSmeta.refchar_RAPositions from SIMBAD database (right ascension part)degpos.eq.ra;meta.main_DEPositions from SIMBAD database (declination part)degpos.eq.dec;meta.main