J/ApJ/728/38ivo://CDS.VizieR/J/ApJ/728/38doi:10.26093/cds/vizier.17280038CDSYan R.Ho L.C.Newman J.A.Coil A.L.Willmer C.N.A.Laird E.S.,Georgakakis A.Aird J.Barmby P.Bundy K.Cooper M.C.Davis M.,Faber S.M.Fang T.Griffith R.L.Koekemoer A.M.Koo D.C.Nandra K.,Park S.Q.Sarajedini V.L.Weiner B.J.Willner S.P.2017-09-27T05:55:42Z2012-10-17T08:12:37ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleispectroscopysurveysx-ray-sourcesgalaxiesvisible-astronomyredshiftedastronomical-object-identificationWe develop a new diagnostic method to classify galaxies into active galactic nucleus (AGN) hosts, star-forming galaxies, and absorption-dominated galaxies by combining the [OIII]/H{beta} ratio with rest-frame U-B color. This can be used to robustly select AGNs in galaxy samples at intermediate redshifts (z<1). We compare the result of this optical AGN selection with X-ray selection using a sample of 3150 galaxies with 0.3<z<0.8 and I_AB_<22, selected from the DEEP2 Galaxy Redshift Survey and the All-wavelength Extended Groth Strip International Survey. Among the 146 X-ray sources in this sample, 58% are classified optically as emission-line AGNs, the rest as star-forming galaxies or absorption-dominated galaxies. The latter are also known as "X-ray bright, optically normal galaxies" (XBONGs).2011ApJ...728...38Yhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/728/38CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/chandra : The Chandra Archive Log (CXC, 1999-2012)J/A+A/526/A72 : Early-type galaxies in the EGS (Fernandez Lorenzo+, 2011)J/ApJS/193/30 : UV-to-FIR analysis of sources in the EGS. II. (Barro+, 2011)J/ApJ/717/1181 : Spitzer power-law galaxies in EGS (Park+, 2010)J/ApJ/703/2160 : The OPTX project. III. (Trouille+, 2009)J/ApJS/184/158 : Chandra COSMOS survey I. (Elvis+, 2009)J/ApJS/180/102 : AEGIS-X: Chandra deep survey (Laird+, 2009)J/ApJ/654/115 : DEEP2 Galaxy Redshift Survey: SDSS QSOs (Coil+, 2007)J/A+A/466/31 : The HELLAS2XMM survey. VIII (Cocchia+, 2007)J/MNRAS/356/568 : Deep Chandra survey of the Groth Strip (Nandra+, 2005)J/ApJ/602/231 : Chandra X-ray sources in nearby galaxies (Colbert+, 2004)J/ApJS/121/473 : A diagnostic diagram for Seyfert 2 Galaxies (Bassani+, 1999)J/ApJS/112/315 : Spectroscopic parameters of Seyfert nuclei (Ho+ 1997)J/ApJS/98/477 : Optical spectral atlas of Seyfert nuclei (Ho+ 1995)J/ApJS/95/1 : Atlas of Quasar Energy Distributions (Elvis+ 1994)J/ApJS/80/531 : An X-ray catalog and atlas of galaxies. (Fabbiano+, 1992)http://aegis.ucolick.org/ : AEGIS home pagehttp://deep.berkeley.edu/ : DEEP2 redshift survey home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/728/38https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/728/38http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/728/38https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/728/38https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/728/38http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/728/38GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/728/38/table4 (Optical properties of all X-ray sources and optically classified AGNs in our sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/728/38/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/728/38/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/728/38/table4?GETtext/xml+votable180.050000true213.8242351.979310.0055555555555555566/11424 11425 11426 11428https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/728/38?format=asciiX-rayOpticaldefaultJ/ApJ/728/38/table4Optical properties of all X-ray sources and optically classified AGNs in our samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/374] Extended Groth Strip AGN numbermeta.id;meta.mainint[LNG2009]Laird et al. 2009 (Cat. J/ApJS/180/102) identifier (egs_NNNN) (1)meta.id.crosscharDEEP2-GRSDEEP2 Galaxy Redshift Survey identifier (2)meta.id;meta.mainRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainz[0.3/0.9] Redshiftsrc.redshiftfloatImag[17.9/22] The I band (AB) magnitudemagphot.mag;em.opt.IfloatU-B? Restframe (U-B) (AB) color indexmagphot.color;em.opt.U;em.opt.Bfloatnullablef_U-B[*] object in B-band drop out (3)meta.codecharl_logO3Limit flag on logO3meta.code.errorcharlogO3Log of [OIII] flux; erg/s/cm^2^log(mW.m**-2)phot.fluxfloate_logO3? Uncertainty in logO3log(mW.m**-2)stat.errorfloatnullablel_logHbLimit flag on logHbmeta.code.errorcharlogHbLog of H{beta} flux; erg/s/cm^2^log(mW.m**-2)phot.fluxfloate_logHb? Uncertainty in logHblog(mW.m**-2)stat.errorfloatnullablel_O3/HbLimit flag on O3/Hbmeta.code.error;phys.abundcharO3/Hb? Log ratio of [OIII] to H{beta} fluxesphot.flux;arith.ratiofloatnullables[1/2] Source of z, [OIII], & H{beta} (4)meta.ref;pos.frameintClassClassification (5)src.classcharSimbadSimbad column added by the CDSmeta.refcharNEDSimbad column added by the CDSmeta.refchar