J/A+A/556/A114ivo://CDS.VizieR/J/A+A/556/A114doi:10.26093/cds/vizier.35560114CDSCastello-Mor N.Carrera F.J.Alonso-Herrero A.Mateos S.Barcons X.,Ranalli P.Perez-Gonzalez P.G.Comastri A.Vignali C.,Georgantopoulos I.2018-01-04T08:21:28Z2014-01-07T14:51:18ZCDS support team

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

cds-question@unistra.frsurveysactive-galactic-nucleix-ray-sourcesinfrared-sourcesAccretion onto supermassive black holes is believed to occur mostly in obscured active galactic nuclei (AGN). Such objects are proving rather elusive in surveys of distant galaxies, including those at X-ray energies. Our main goal is to determine whether the revised IRAC criteria of Donley et al. (2012ApJ...748..142D; objects with an infrared (IR) power-law spectral shape), are effective at selecting X-ray type-2 AGN (i.e., absorbed N_H_>10^22^cm^-2^). We present the results from the X-ray spectral analysis of 147 AGN selected by cross-correlating the highest spectral quality ultra-deep XMM-Newton and the Spitzer/IRAC catalogues in the Chandra Deep Field South. Consequently it is biased towards sources with high S/N X-ray spectra. In order to measure the amount of intrinsic absorption in these sources, we adopt a simple X-ray spectral model that includes a power-law modified by intrinsic absorption at the redshift of each source and a possible soft X-ray component.2013A&A...556A.114Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/556/A114CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/xmm : XMM-Newton Observation Log (XMM-Newton SOC, 2013)J/ApJS/161/21 : Extended Chandra Deep Field-South survey (Lehmer+, 2005)J/ApJS/195/10 : The CDF-S survey: 4Ms source catalogs (Xue+, 2011)J/A+A/555/A42 : The XMM-CDFS catalogues (Ranalli+, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/556/A114https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/556/A114http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/556/A114https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/556/A114https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/556/A114http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/556/A114GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/556/A114/table1 (Details of the X-ray sources with IRAC counterpart found in this analysis)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/556/A114/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/556/A114/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/556/A114/table1?GETtext/xml+votable180.050000true53.0845833-28.03750.0055555555555555566/35935 35957https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/556/A114?format=asciiX-rayInfrareddefaultJ/A+A/556/A114/table1Details of the X-ray sources with IRAC counterpart found in this analysisSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID210[2/390] Identification number of X-ray source listed in Ranalli et al. (2013, J/A+A/555/A42)meta.id;meta.mainintzRedshift of the source rounded to two (photometric) or three (spectroscopic) decimalsrc.redshiftfloatf_z[p] 'p' for photometric redshiftmeta.codecharRXObserved 2-10keV flux of the source (in 10^-15^erg/cm^2^/s)aW.m**-2phot.flux;em.X-rayfloatLXUnabsorbed rest-frame 2-10keV luminosity of the source using the best fit model (10^42^erg/s)1e+35Wphys.luminosity;em.X-raydoublel_Gamma[<>= ] Limit flag on Gammameta.code.errorcharGammaX-ray photon index {Gamma}meta.code;spect.index;em.X-rayfloatn_Gamma[+] + indicates that {Gamma} was assumedmeta.notecharNHi? Intrinsic column density NH measured from the best fit model in column Model1e+22cm**-2phys.columnDensityfloatnullablekT? Electron temperature for the soft Comptonisation componentkeVphys.temperaturefloatnullableMod[A-E] Best-fitting model for the spectrum (1)stat.param;meta.modelledcharn_Mod[XV] Flag to denote whether the sources is classified as IR power-law (V) or IR no-power-law galaxy (X)meta.notecharl_NH0[<>= ] Limit flag on confidence intervalmeta.code.errorcharNH0? Lower value of 1{sigma} confidence interval on the intrinsic column density measured using models C, D, E1e+22cm**-2phys.columnDensityfloatnullableNH1? Upper value of 1{sigma} confidence interval on the intrinsic column density measured using models C, D, E1e+22cm**-2phys.columnDensityfloatnullableCl[au-] Classification of the source: a=absorbed, u=unabsorbed, -=unclassifiedmeta.code.classchar_RAPositions from Paper III, Ranalli et al., J/A+A/555/A42 (right ascension part)degpos.eq.ra;meta.mainnullable_DEPositions from Paper III, Ranalli et al., J/A+A/555/A42 (declination part)degpos.eq.dec;meta.mainnullable