J/A+A/681/A69ivo://CDS.VizieR/J/A+A/681/A69doi:10.26093/cds/vizier/bc-n9/lgjCDSBenke P.Roesch F.Ros E.Kadler M.Ojha R.Edwards P.G.Horiuchi S.,Hyland L.J.Phillips C.Quick J.F.H.Stevens J.Tzioumis A.K.Weston S.2026-07-03T06:35:54Z2024-01-16T10:25:43ZCDS support team

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

cds-question@unistra.frradio-sourcesactive-galactic-nucleigamma-ray-astronomyWith the emergence of very high energy astronomy (VHE; E>100GeV), new open questions were presented to astronomers studying the multi-wavelength emission from blazars. Answers to these open questions, such as the Doppler crisis, and finding the location of the high-energy activity have eluded us thus far. Recently, quasi-simultaneous multi-wavelength monitoring programs have shown considerable success in investigating blazar activity. After the launch of the Fermi Gamma-ray Space Telescope in 2008, such quasi-simultaneous observations across the electromagnetic spectrum became possible. In addition, with very long baseline interferometry (VLBI) observations we can resolve the central parsec region of active galactic nuclei (AGN) and compare morphological changes to the gamma-ray activity to study high-energy emitting blazars. To achieve our goals, we need sensitive, long-term VLBI monitoring of a complete sample of VHE detected AGN. We performed VLBI observations of TeV-detected AGN and high likelihood neutrino associations as of December of 2021 with the Long Baseline Array (LBA) and other southern hemisphere radio telescopes at 2.3GHz. In this paper we present first light TANAMI S-band images, focusing on the TeV-detected sub-sample of the full TANAMI sample. Apart from these very high energy-detected sources, we also show images of the two flux density calibrators and two additional sources included in the observations. We study the redshift, 0.1-100GeV photon flux and S-band core brightness temperature distributions of the TeV-detected objects, and find that flat spectrum radio quasars and low synchrotron peaked sources on average show higher brightness temperatures than high-synchrotron-peaked BL Lacs. Sources with bright GeV gamma-ray emission also show higher brightness temperature values than gamma-low sources. Long-term monitoring programs are crucial to study the multi-wavelength properties of active galactic nuclei. With the successful detection of even the faintest sources with flux densities below 50mJy, future work will entail kinematic analysis and spectral studies both at 2.3 and 8.4GHz to investigate the connection between the radio and gamma-ray activity of these objects.2024A&A...681A..69Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/681/A69CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/627/A148 : TANAMI radio galaxies I (Angioni+, 2019)J/A+A/610/A1 : TANAMI II. Additional sources (Mueller+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/681/A69https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/681/A69http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/681/A69https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/681/A69https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/681/A69http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/681/A69GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/681/A69/tablea1 (Sources observed during the first three S band epochs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/681/A69/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/681/A69/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/681/A69/tablea1?GETtext/xml+votable180.050000true2.848125-19.17988330.005555555555555556Cone search capability for table J/A+A/681/A69/list (List of fits images)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/681/A69/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/681/A69/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/681/A69/list?GETtext/xml+votable180.050000true2.848125-19.17988330.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/681/A696/16447 16796 16812 20624 25132 26131 34209 34572 35981 36058 36342 37686 38797 39658 42515 43262 43366 43380 43603 43739 44153 44247 44908 45763 46444 47014 47375 480231.5239959695752804e-24 1.5239959695752804e-24https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/681/A69?format=asciiGamma-rayRadiodefaultJ/A+A/681/A69/tablea1Sources observed during the first three S band epochszRedshiftsrc.redshiftfloatr_zRedshift reference (2)meta.ref;pos.frameintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSourceSource name (HHMM-DDMM)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainANameAlternative namemeta.idcharClassClass (1)meta.code.classcharXep? X band first epoch reference (3)meta.bibintnullableAssocAssociationmeta.id.parentcharJ/A+A/681/A69/tablea2Image properties of non-TeV sources and calibrators observed during 2020-2021 in S bandrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSourceSource name (HHMM-DDMM)meta.id;meta.maincharMtypeMorphology (1)src.morphcharEpochDatetime.epochnullablebmajBeam major axismasphys.angSize;instr.beamfloatbminBeam minor axismasphys.angSize;instr.beamfloatPA[] Beam position angledegpos.posAng;instr.beamintStotTotal flux density at 2.3GHzmJyphot.flux.density;em.radio.1500-3000MHzfloatsigmaRms noise of the imagemJy/beamstat.stdev;instr.det.noise;obs.imagefloatIbaseLowest contourmJy/beamphot.flux.density;em.radio.1500-3000MHzfloatJ/A+A/681/A69/tablea3Image properties of the TeV-detected AGN in our observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSourceSource name (HHMM-DDMM)meta.id;meta.maincharMTypeMorphology (1)src.morphcharEpochDatetime.epochnullablebmajBeam major axismasphys.angSize;instr.beamfloatbminBeam minor axismasphys.angSize;instr.beamfloatPA[] Beam position angledegpos.posAng;instr.beamintStotTotal flux density at 2.3GHzmJyphot.flux.density;em.radio.1500-3000MHzfloatsigmarms noise of the imagemJy/beamstat.stdev;instr.det.noise;obs.imagefloatIbaseLowest contourmJy/beamphot.flux.density;em.radio.1500-3000MHzfloatScoreFlux density of the core at 2.3GHzmJyphot.flux.density;em.radio.1500-3000MHzfloate_ScoreError of flux density of the coremJystat.errorfloatThetacoreFWHM of the coremasphys.angSize.smajAxisfloate_ThetacoreError on FWHM of the coremasstat.errorfloatTbBrightness temperatureKphys.temperaturedoublee_TbError of brightness temperatureKstat.errordoubleS0.1-100GeV photon flux (2)ph.cm**-2.s**-1phot.flux.density;em.gamma.harddoublee_SError of 0.1-100GeV photon flux (2)ph.cm**-2.s**-1stat.errordoubleSTeV? Very high energy flux in Crab unitsCrabphot.flux;em.X-rayfloatnullableJ/A+A/681/A69/listList of fits imagesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSourceSource name (HHMM-DDMM)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainObs.dateObservation datetime.epoch;obsnullableFileNameName of the fits file in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the fits filemeta.title;meta.fitscharAssocDataAssociated Data web pagemeta.ref.urlchar