J/ApJ/717/1181ivo://CDS.VizieR/J/ApJ/717/1181doi:10.26093/cds/vizier.17171181CDSPark S.Q.Barmby P.Willner S.P.Ashby M.L.N.Fazio G.G.,Georgakakis A.Ivison R.J.Konidaris N.P.Miyazaki S.Nandra K.,Rosario D.J.2017-09-29T09:03:40Z2012-06-25T12:08:10ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleiinfrared-photometryx-ray-sourcesastronomical-object-identificationredshiftedThis paper analyzes a sample of 489 Spitzer/Infrared Array Camera (IRAC) sources in the Extended Groth Strip (EGS), whose spectral energy distributions fit a red power law (PL) from 3.6 to 8.0um. The median redshift for sources with known redshifts is <z>=1.6. Though all or nearly all of the sample galaxies are likely to be active galactic nuclei (AGNs), only 33% were detected in the EGS X-ray survey (AEGIS-X) using 200ks Chandra observations. The detected sources are X-ray luminous with L_X_>10^43^erg/s and moderately to heavily obscured with N_H_>10^22^cm^-2^. Stacking the X-ray-undetected sample members yields a statistically significant X-ray signal, suggesting that they are on average more distant or more obscured than sources with X-ray detections. The ratio of X-ray to mid-infrared fluxes suggests that a substantial fraction of the sources undetected in X-rays are obscured at the Compton-thick level, in contrast to the X-ray-detected sources, all of which appear to be Compton thin.2010ApJ...717.1181Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/717/1181CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/193/30 : UV-to-FIR analysis of sources in the EGS. II. (Barro+, 2011)J/ApJS/193/13 : Spitzer/IRAC sources in the EGS I. SEDs (Barro+, 2011)J/ApJS/180/102 : AEGIS-X: Chandra deep survey (Laird+, 2009)J/AJ/137/179 : AGNs in the EGS Survey (Ramos Almeida+, 2009)J/ApJS/177/431 : Mid-IR sources in EGS (Barmby+, 2008)J/MNRAS/382/109 : Massive galaxies in Extended Groth Strip (Trujillo+, 2007)J/AJ/132/2159 : IRAC counterparts of 6cm galaxies in EGS (Willner+, 2006)J/ApJ/642/126 : Mid-IR observations in the EGS (Barmby+, 2006)http://irsa.ipac.caltech.edu/data/SPITZER/docs/spitzermission/observingprograms/legacy/fidel/ : FIDEL data online pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/717/1181https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/717/1181http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/717/1181https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/717/1181https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/717/1181http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/717/1181GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/717/1181/table2 (Properties of power-law AGNs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/717/1181/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/717/1181/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/717/1181/table2?GETtext/xml+votable180.050000true213.6132552.02766670.0055555555555555566/11424 11425 114286.772611666688002e-21 6.185923063528282e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/717/1181?format=asciiX-rayOpticalInfrareddefaultJ/ApJ/717/1181/table2Properties of power-law AGNsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEGSPLExtended Groth Strip Power Law identificationmeta.idintEGSIRACIRAC Extended Groth Strip identification (1)meta.id;meta.maincharalphaiThe 3.6-8 micron power-law spectral index (2)spect.indexfloatPiThe 3.6-8 micron probability (3)stat.fit.goodnessfloatalpham? The 3.6-24 micron power-law spectral index (2)spect.indexfloatnullablePm? The 3.6-24 micron probability (3)stat.fit.goodnessfloatnullablez? Redshiftsrc.redshiftfloatnullableS3.6Spitzer/IRAC 3.6 micron flux density (4)uJyphot.mag;em.IR.3-4umfloatS4.5Spitzer/IRAC 4.5 micron flux density (4)uJyphot.mag;em.IR.4-8umfloatS5.8Spitzer/IRAC 5.8 micron flux density (4)uJyphot.flux.density;em.IR.4-8umfloatS8.0Spitzer/IRAC 8.0 micron flux density (4)uJyphot.flux.density;em.IR.8-15umfloatS24? Spitzer/MIPS 24 micron flux densityuJyphot.flux.density;em.IR.15-30umfloatnullableL09? X-ray catalog identification (159 sources) (5)meta.id.crossintnullableLX? Log 2-10keV band luminosity; in erg/slog(1e-07W)phys.luminosity;em.X-rayfloatnullableNEDSimbad column added by the CDSmeta.refchar_RAPositions from EGSIRAC name (right ascension part)degpos.eq.ra;meta.main_DEPositions from EGSIRAC name (declination part)degpos.eq.dec;meta.main