J/A+A/647/A195ivo://CDS.VizieR/J/A+A/647/A195doi:10.26093/cds/vizier.36470195CDSGiuliani L.Ghisellini G.Sbarrato T.2023-05-05T10:22:01Z2021-06-28T13:09:29ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleispectral-energy-distributiongamma-ray-astronomyx-ray-sourcesWe collect data at all frequencies for the new sources classified as unknown active galactic nuclei (AGNs) in the latest Burst Alert Telescope all-sky hard X-ray catalog. Focusing on the 36 sources with measured redshift, we compute their spectral energy distribution (SED) from radio to {gamma}-rays with the aim to classify these objects. We apply emission models that attempt to reproduce the obtained SEDs, including: (i) a standard thin accretion disk together with an obscuring torus and a X-ray corona; (ii) a two temperature thick advection-dominated flow; (iii) an obscured AGN model, accounting for absorption along the line of sight at kiloelectronvolt energies and in the optical band; and (iv) a phenomenological model to describe the jet emission in blazar-like objects. We integrate the models with the SWIRE template libraries to account for the emission of the host galaxy. For every source we found a good agreement between data and our model. Considering that the sources were selected in the hard X-ray band, which is rather unaffected by absorption, we expected and found a large fraction of absorbed radio-quiet AGNs (31 out of 36) and some additional rare radio-loud sources (5 out of 36), since the jet emission in hard X-rays is important for aligned jets owing to the boost produced by the beaming effect. With our work we can confirm the hypothesis that a number of galaxies, whose optical spectra lack AGN emission features, host an obscured active nucleus. The approach we used proved to be efficient in rapidly identifying objects, which commonly used methods were not able to classify.2021A&A...647A.195Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/647/A195CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/647/A195https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/647/A195http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/647/A195https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/647/A195https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/647/A195http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/647/A195GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/647/A195/table2 (Fit parameters for the unknown AGNs (phenomenological jet model with accretion disk) identified as blazars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/647/A195/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/647/A195/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/647/A195/table2?GETtext/xml+votable180.050000true22.888-10.1330.005555555555555556Cone search capability for table J/A+A/647/A195/table4 (BAT 105 unknown AGNs classification as results from our work)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/647/A195/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/647/A195/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/647/A195/table4?GETtext/xml+votable180.050000true0.12532.8470.0055555555555555566/181 392 2552 3843 6270 9513 9725 11657 12212 17446 17471 17890 19083 20422 25773 26904 29368 29776 31118 31590 32370 32606 33650 35004 35661 35706 36229 38329 38549 39153 42294 45738 45910 46191 46755 49048https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/647/A195?format=asciiGamma-rayX-raydefaultJ/A+A/647/A195/table1Fit results for the sources SWIFT soft-X spectraSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSourceSource name (SWIFT JHHMM.m+DDSS)meta.id;meta.maincharzSource redshiftsrc.redshiftfloatttot? Total exposure timekstime.duration;obs.exposurefloatnullablealpha0.3-2? Photon index in the 0.3-2keV band (1)spect.indexfloatnullableb_alpha0.3-2? Lower value of alpha0.3-2 intervaltime.intervalfloatnullableB_alpha0.3-2? Upper value of alpha0.3-2 intervaltime.intervalfloatnullablef0.3-2? Total flux in the 0.3-2keV bandmW.m**-2phot.flux;em.X-ray.softdoublenullableb_f0.3-2? Lower value of f0.3-2 intervalmW.m**-2time.intervaldoublenullableB_f0.3-2? Upper value of f0.3-2 intervalmW.m**-2time.intervaldoublenullablealpha2-10? Photon index in the 2-10keV band (1)spect.indexfloatnullableb_alpha2-10? Lower value of alpha2-10 intervaltime.intervalfloatnullableB_alpha2-10? Upper value of alpha2-10 intervaltime.intervalfloatnullablef2-10? Total flux in the 2-10keVmW.m**-2phot.flux;em.X-raydoublenullableb_f2-10? Lower value of f2-10 intervalmW.m**-2time.intervaldoublenullableB_f2-10? Upper value of f2-10 intervalmW.m**-2time.intervaldoublenullableJ/A+A/647/A195/table2Fit parameters for the unknown AGNs (phenomenological jet model with accretion disk) identified as blazarsSourceSource name (SWIFT JHHMM.m+DDMM)meta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCDCompton dominance ratiophot.flux;arith.ratiofloatnuLSSynchrotron peak luminosity in nuL(nu)1e-07Wphys.luminosity;em.gammadoublea1a1 power-law slopestat.fit.paramfloata2a2 power-law slopestat.fit.paramfloata3a3 power-law slopestat.fit.paramfloatnusSynchrotron peak frequencyHzem.freqdoublenucInverse-Compton peak frequencyHzem.freqdoublenucutsCutoff frequency for low-energy spectraHzem.freqdoublenucutcCutoff frequency for high-energy spectraHzem.freqdoublenuTSelf-absorption frequencyHzem.freqdoublearPower-law slope for nu<nuTstat.fit.paramfloatdM/dt? Accretion ratiosolMass/yrphys.mass.lossfloatnullableMBH? Black hole mass (1)solMassphys.massdoublenullableRT? Obscuring torus radius (1)pcphys.size.radiusfloatnullablethetaT? Obscuring torus covering angle (1)degpos.posAngfloatnullablelEdd? Accretion disk Eddington ratio (1)phys.luminosity;arith.ratiofloatnullable_RAFrom Simbad and https://swift.gsfc.nasa.gov/results/bs105mon/ (right ascension part)degpos.eq.ra;meta.main_DEFrom Simbad and https://swift.gsfc.nasa.gov/results/bs105mon/ (declination part)degpos.eq.dec;meta.mainJ/A+A/647/A195/table3Fit parameters for unknown AGNs (obscured AGN emission model)thetaDB? Dust belt covering angledegpos.posAngfloatnullableRTObscuring torus radiuspcphys.size.radiusfloatthetaTObscuring torus covering angledegpos.posAngfloatfIntrinsic corona scattered component (as fraction of the total flux)phot.flux;arith.ratiofloatNHHydrogen column densitycm**-2phys.columnDensitydoubleNHgalHydrogen column density from host galactic gascm**-2phys.columnDensitydoublegammagamma X-ray corona power-law indexspect.indexfloatGG normalization coefficient for the galaxy emission templatemeta.notefloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSourceSource name (SWIFT JHHMM.m+DDMM)meta.id;meta.mainchardM/dtAccretion ratiosolMass/yrphys.mass.lossfloatMBlack hole masssolMassphys.massdoublelEddAccretion disk Eddington ratiophys.luminosity;arith.ratiofloatRDB? Dust belt radiuspcphys.size.radiusfloatnullableABAB extinction at wavelength {lambda}_B_=0.44ummagphys.absorptionfloatJ/A+A/647/A195/table4BAT 105 unknown AGNs classification as results from our workSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSourceSource name (SWIFT JHHMM.m+DDMM)meta.id;meta.maincharClassClassificationsrc.classchar_RAFrom Simbad and https://swift.gsfc.nasa.gov/results/bs105mon/ (right ascension part)degpos.eq.ra;meta.main_DEFrom Simbad and https://swift.gsfc.nasa.gov/results/bs105mon/ (declination part)degpos.eq.dec;meta.main