J/A+A/586/A60ivo://CDS.VizieR/J/A+A/586/A60doi:10.26093/cds/vizier.35860060CDSKaramanavis V.Fuhrmann L.Krichbaum T.P.Angelakis E.Hodgson J.,Nestoras I.Myserlis I.Zensus J.A.Sievers A.Ciprini S.2018-01-12T15:17:31Z2016-01-26T07:34:23ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleiradio-galaxiesvery-long-baseline-interferometryBlazars are among the most energetic objects in the Universe. In 2008 August, Fermi/LAT detected the blazar PKS 1502+106, which showed a rapid and strong gamma-ray outburst followed by high and variable flux over the next months. This activity at high energies triggered an intensive multi-wavelength campaign that also covered the radio, optical, UV, and X-ray bands, indicating that the flare was accompanied by a simultaneous outburst at optical/UV/X-rays and a delayed outburst at radio bands. We explore the phenomenology and physical conditions within the ultra-relativistic jet of the gamma-ray blazar PKS 1502+106. Additionally, we address the question of the spatial localization of the MeV/GeV-emitting region of the source. We used ultra-high angular resolution mm-VLBI observations at 43 and 86GHz complemented by VLBI observations at 15GHz. We also employed single-dish radio data from the F-GAMMA program at frequencies matching the VLBI monitoring. PKS 1502+106 shows a compact core-jet morphology and fast superluminal motion with apparent speeds in the range 5-22c. Estimating Doppler factors along the jet yields values of between ~7 up to ~50. This Doppler factor gradient implies an accelerating jet. The viewing angle towards the source differs between the inner and outer jet, with the former at {theta}~3{deg} and the latter at {theta}~1{deg}, after the jet bends towards the observer beyond 1mas. The de-projected opening angle of the ultra-fast magnetically dominated jet is found to be (3.8+/-0.5){deg}. A single jet component can be associated with the pronounced flare both at high energies and in radio bands. Finally, the gamma-ray emission region is localized at <=5.9pc away from the jet base.2016A&A...586A..60Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/586/A60CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/586/A60https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/586/A60http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/586/A60https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/586/A60https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/586/A60http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/586/A60GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/586/A60/list15 (List of FITS images at 15GHz)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/586/A60/list15?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/586/A60/list15?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/586/A60/list15?GETtext/xml+votable180.050000true226.1040810.494220.005555555555555556Cone search capability for table J/A+A/586/A60/list43 (List of FITS images at 43GHz)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/586/A60/list43?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/586/A60/list43?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/586/A60/list43?GETtext/xml+votable180.050000true226.1040810.494220.005555555555555556Cone search capability for table J/A+A/586/A60/list86 (List of FITS images at 86GHz)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/586/A60/list86?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/586/A60/list86?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/586/A60/list86?GETtext/xml+votable180.050000true226.1040810.494220.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/586/A606/8299https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/586/A60?format=asciiRadiodefaultJ/A+A/586/A60/list15List of FITS images at 15GHzrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension of center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainNx[1024] Number of pixels along X-axismeta.numberintNy[1024] Number of pixels along Y-axismeta.numberintFreqFrequency (15, 43 or 86)GHzem.freqfloatObs.DateObservation datetime.epoch;obsnullablesizeSize of FITS fileMbytephys.size;meta.fitsfloatFileNameName of FITS file with the subdirectory namemeta.id;meta.fitscharTitleTitle of the filemeta.title;meta.filecharAssocDataAssociated Data web pagemeta.bib.pagecharJ/A+A/586/A60/list43List of FITS images at 43GHzrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension of center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainNx[1024] Number of pixels along X-axisintNy[1024] Number of pixels along Y-axisintFreqFrequency (15, 43 or 86)GHzfloatObs.DateObservation datenullablesizeSize of FITS fileMbytefloatFileNameName of FITS file with the subdirectory namemeta.refcharTitleTitle of the filemeta.title;meta.filecharAssocDataAssociated Data web pagemeta.bib.pagecharJ/A+A/586/A60/list86List of FITS images at 86GHzrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension of center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainNx[1024] Number of pixels along X-axisintNy[1024] Number of pixels along Y-axisintFreqFrequency (15, 43 or 86)GHzfloatObs.DateObservation datenullablesizeSize of FITS fileMbytefloatFileNameName of FITS file with the subdirectory namemeta.refcharTitleTitle of the filemeta.title;meta.filecharAssocDataAssociated Data web pagemeta.bib.pagechar