J/ApJ/680/130ivo://CDS.VizieR/J/ApJ/680/130doi:10.26093/cds/vizier.16800130CDSCardamone C.N.Urry C.M.Damen M.Van Dokkum P.Treister E.Labbe I.,Virani S.N.Lira P.Gawiser E.2017-10-09T13:33:41Z2010-10-25T09:03:32ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleisurveysastronomical-object-identificationinfrared-photometryx-ray-sourcesWe present the mid-infrared colors of X-ray-detected AGNs and explore mid-infrared selection criteria. Using a statistical matching technique, the likelihood ratio, over 900 IRAC counterparts were identified with a new MUSYC X-ray source catalog that includes ~1000 published X-ray sources in the Chandra Deep Field-South and Extended Chandra Deep Field-South. Most X-ray-selected AGNs have IRAC spectral shapes consistent with power-law slopes, f_{nu}_{prop.to}{nu}^{alpha}^, and display a wide range of colors, -2<=alpha}<=2 Although X-ray sources typically fit to redder (more negative {alpha}) power laws than non-X-ray-detected galaxies, more than 50% do have flat or blue (galaxy-like) spectral shapes in the observed 3-8um band. Only a quarter of the X-ray-selected AGNs detected at 24um are well fit by featureless red power laws in the observed 3.6-24um, likely the subset of our sample whose infrared spectra are dominated by emission from the central AGN region. Most IRAC color selection criteria fail to identify the majority of X-ray-selected AGNs, finding only the more luminous AGNs, the majority of which have broad emission lines. In deep surveys, these color selection criteria select 10%-20% of the entire galaxy population and miss many moderate-luminosity AGNs.2008ApJ...680..130Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/680/130CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/253 : Chandra Deep Field South: multi-colour data (Wolf+, 2008)III/250 : The VIMOS VLT deep survey (VVDS-DEEP) (Le Fevre+ 2005)J/ApJS/183/295 : A K-selected catalog of the ECDFS from MUSYC (Taylor+, 2009)J/A+A/478/83 : GOODS-South Field VLT/FORS2 redshifts. III. (Vanzella+, 2008)J/AJ/134/1103 : MUSYC deep near-infrared imaging (Quadri+, 2007)J/ApJS/162/1 : MUSYC: optical source catalog (Gawiser+, 2006)J/AJ/131/2373 : Extended Chandra Deep Field-South survey (Virani+, 2006)J/ApJS/161/21 : Extended Chandra Deep Field-South survey (Lehmer+, 2005)J/ApJS/155/271 : Chandra Deep Field-South: Optical spectroscopy (Szokoly+,J/AJ/126/539 : The Chandra Deep Fields North and South (Alexander+, 2003)J/ApJS/139/369 : Chandra Deep Field South. 1 Ms catalog (Giacconi+, 2002)J/MNRAS/328/150 : KX redshift survey (Croom+, 2001)http://www.astro.yale.edu/MUSYC : MUSYC Public Data Release webpagehttp://data.spitzer.caltech.edu/popular/simple : Online data from SIMPLEhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/680/130https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/680/130http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/680/130https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/680/130https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/680/130http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/680/130GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/680/130/table1 (X-ray and infrared properties of MUSYC ECDF-S X-ray sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/680/130/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/680/130/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/680/130/table1?GETtext/xml+votable180.050000true52.93420806-27.823916940.0055555555555555566/35934 35935 359576.772611666688002e-21 6.185923063528282e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/680/130?format=asciiX-rayInfrareddefaultJ/ApJ/680/130/table1X-ray and infrared properties of MUSYC ECDF-S X-ray sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDRunning MUSYC XR Source catalog number (1)meta.id;meta.mainintCatIDOriginal catalog number (AYY:NNN) (2)meta.idcharRAXX-ray Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEXX-ray Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainHRX-ray Hardness Ratio (3)phot.flux;em.X-ray;arith.ratiofloatF3.6? IRAC Channel 1 (3.6um) flux densityuJyphot.mag;em.IR.3-4umdoublenullablee_F3.6? The 1{sigma} error for F3.6umuJystat.errorfloatnullableF4.5? IRAC Channel 2 (4.5um) flux densityuJyphot.mag;em.IR.4-8umdoublenullablee_F4.5? The 1{sigma} error for F4.5umuJystat.errorfloatnullableF5.8? IRAC Channel 3 (5.8um) flux densityuJyphot.flux.density;em.IR.4-8umdoublenullablee_F5.8? The 1{sigma} error for F5.8umuJystat.errorfloatnullableF8.0? IRAC Channel 4 (8.0um) flux densityuJyphot.flux.density;em.IR.8-15umdoublenullablee_F8.0? The 1{sigma} error for F8.0umuJystat.errorfloatnullabler_F24Source Catalog for MIPS 24 micron flux (4)meta.ref;pos.framecharF24? Spitzer/MIPS 24 micron fluxuJyphot.flux.density;em.IR.15-30umfloatnullablee_F24? The 1{sigma} error for F24umuJystat.errorfloatnullablelogLX? Log of X-ray luminosity in units of erg/s (5)log(1e-07W)phys.luminosity;em.X-rayfloatnullabler_logLX? Source of redshift (6)meta.ref;pos.frameintnullablenotesEmission lines comment (7)meta.notecharSimbadNameSimbad column added by the CDSmeta.idcharXIDDisplay the data from G02 (J/ApJS/139/369), A03 (J/AJ/126/539), L05 (J/ApJS/161/21) or V06 (J/AJ/131/2373)meta.ref.urlchar