J/ApJ/876/50ivo://CDS.VizieR/J/ApJ/876/50doi:10.26093/cds/vizier.18760050CDSLaMassa S.M.Georgakakis A.Vivek M.Salvato M.Ananna T.T.Urry C.M.,MacLeod C.Ross N.2021-08-13T14:51:03Z2020-10-27T12:58:19ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleisurveysvisible-astronomyspectroscopyredshiftedsloan-photometryinfrared-photometryx-ray-sourcesWe report the results of a Sloan Digital Sky Survey IV eBOSS program to target X-ray sources and mid-infrared-selected Wide-field Infrared Survey Explorer (WISE) active galactic nucleus (AGN) candidates in a 36.8deg^2^ region of Stripe 82. About half this survey (15.6deg^2^) covers the largest contiguous portion of the Stripe 82 X-ray survey. This program represents the largest spectroscopic survey of AGN candidates selected solely by their WISE colors. We combine this sample with X-ray and WISE AGNs in the field identified via other sources of spectroscopy, producing a catalog of 4847 sources that is 82% complete to r~22. Based on X-ray luminosities or WISE colors, 4730 of these sources are AGNs, with a median sample redshift of z~1. About 30% of the AGNs are optically obscured (i.e., lack broad lines in their optical spectra). BPT analysis, however, indicates that 50% of the WISE AGNs at z<0.5 have emission line ratios consistent with star-forming galaxies, so whether they are buried AGNs or star-forming galaxy contaminants is currently unclear. We find that 61% of X-ray AGNs are not selected as mid-infrared AGNs, with 22% of X-ray AGNs undetected by WISE. Most of these latter AGNs have high X-ray luminosities (Lx>10^44^erg/s), indicating that mid-infrared selection misses a sizable fraction of the highest luminosity AGNs, as well as lower luminosity sources where AGN-heated dust is not dominating the mid-infrared emission. Conversely, ~58% of WISE AGNs are undetected by X-rays, though we do not find that they are preferentially redder than the X-ray-detected WISE AGNs.2019ApJ...876...50Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/876/50CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/261 : GOODS initial results (Giavalisco+, 2004)II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)II/319 : UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012)II/328 : AllWISE Data Release (Cutri+ 2013)II/359 : The VISTA Hemisphere Survey (VHS) catalog DR4.1 (McMahon+, 2013)VII/259 : 6dF galaxy survey final redshift release (Jones+, 2009)V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)VIII/92 : The FIRST Survey Catalog, Version 2014Dec17 (Helfand+ 2015)VII/286 : SDSS quasar catalog, fourteenth data release (Paris+, 2018)J/ApJS/121/473 : A diagnostic diagram for Seyfert 2 Galaxies (Bassani+, 1999)J/AJ/126/539 : The Chandra Deep Fields North and South (Alexander+, 2003)J/ApJ/642/126 : MIR observations in the extended Groth strip (Barmby+, 2006)J/ApJS/172/29 : XMM-Newton survey in COSMOS field. I. (Hasinger+, 2007)J/A+A/497/635 : XMM-Newton wide-field survey in COSMOS (Cappelluti+, 2009)J/MNRAS/392/19 : The 2dF-SDSS QSO survey (Croom+, 2009)J/ApJS/184/158 : Chandra COSMOS survey I. (Elvis+, 2009)J/ApJ/716/348 : The XMM-Newton survey of the COSMOS field (Brusa+, 2010)J/ApJ/708/584 : SEXSI Spitzer catalog (Eckart+, 2010)J/ApJS/195/10 : The CDF-S survey: 4Ms source catalogs (Xue+, 2011)J/ApJS/201/30 : The Chandra COSMOS survey. III. (Civano+, 2012)J/ApJS/199/3 : The quasars MMT-BOSS pilot survey (Ross+, 2012)J/ApJ/772/26 : AGN with WISE. II. The NDWFS Bootes field (Assef+, 2013)J/MNRAS/436/3581 : X-ray observations of Stripe 82 (LaMassa+, 2013)J/ApJ/794/120 : Sloan Digital Sky Survey coadd. Stripe 82 (Annis+, 2014)J/ApJ/788/48 : X-ray through NIR photometry of NGC 2617 (Shappee+, 2014)J/ApJS/210/22 : Herschel Stripe 82 survey (HerS) first cat. (Viero+, 2014)J/ApJS/219/39 : QSOs selection from SDSS and WISE (Richards+, 2015)J/ApJ/819/62 : The COSMOS-Legacy Survey (CLS) catalog (Civano+, 2016)J/MNRAS/456/1359 : IAC Stripe 82 Legacy Project: Photometry (Fliri+, 2016)J/ApJ/817/172 : X-ray Observations of Stripe 82 (LaMassa+, 2016)J/MNRAS/459/1602 : AGN sample in the northern XMM-XXL field (Liu+, 2016)J/MNRAS/457/110 : Northern XMM-XXL field AGN catalog (Menzel+, 2016)J/ApJS/225/1 : SpIES: the Spitzer IRAC Equatorial Survey (Timlin+, 2016)J/ApJ/850/66 : Stripe 82X survey multiwavelength catalog (Ananna+, 2017)J/MNRAS/465/1831 : SDSS-IV eBOSS ELG UgrizW photometry (Delubac+, 2017)J/ApJS/228/2 : Chandra Deep Field-South survey: 7Ms sources (Luo+, 2017)J/ApJS/234/23 : The WISE AGN candidates catalogs (Assef+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/876/50https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/876/50http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/876/50https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/876/50https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/876/50http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/876/50GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/876/50/catalog (Stripe 82X eBOSS Value-added Catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/876/50/catalog?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/876/50/catalog?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/876/50/catalog?GETtext/xml+votable180.050000true14.097408890.165516940.0055555555555555565/4457 4458 4501 4502 4505 4508 4544 6/17661 17662 17663 17803 17806 17807 17825 17826 17827 17836 17837 17838 17840 17842 17848 17997 17998 17999 18001 18002 18003 18012 18013 18014 18017 18019 18028 18029 18036 18040 181808.157980699529898e-21 6.513807192489934e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/876/50?format=asciiX-rayOpticalInfrareddefaultJ/ApJ/876/50/catalogStripe 82X eBOSS Value-added CatalogSimbadNameSimbad column added by the CDSmeta.idcharSpInteractive spectrum from SDSS-DR14meta.ref.urlcharSloanDisplay the online SDSS data for the nearest objectmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000[14.03/28.09] Right ascension in decimal degrees (J2000) (SDSS_RA)degpos.eq.ra;meta.mainDEJ2000[-1.27/1.27] Declination in decimal degrees (J2000) (SDSS_Dec)degpos.eq.dec;meta.mainPlate[394/8793]? SDSS plate (Plate)meta.noteintnullableMJD[51783/57391]? Modified Julian Date of SDSS spectroscopic observation (MJD)dtime.epochintnullableFiber[1/1000]? SDSS fiber (Fiber)meta.noteintnullablez[-0.00082/4.2] Spectroscopic redshift (redshift) (1)src.redshiftdoubleOTOptical spectroscopic classification, vetted via visual inspection (class) (2)src.classcharr_zReference on redshift (z_src) (3)meta.ref;pos.framecharq_z[-999/3] Confidence on spectroscopic redshift via visual inspection (z_conf) (4)meta.code.qual;src.redshiftintumag[15.38/29.87]? u-band (AB) magnitude (u_mag) (5)magphot.mag;em.opt.Udoublenullablee_umag[0.0004/218]? Error on the u-band magnitude (u_err)magstat.error;phot.magdoublenullablegmag[12.61/25.56]? g-band (AB) magnitude (g_mag) (5)magphot.mag;em.opt.Bdoublenullablee_gmag[0.0001/1]? Error on the g-band magnitude (g_err)magstat.error;phot.magdoublenullablermag[12.27/24.41]? r-band (AB) magnitude (r_mag) (5)magphot.mag;em.opt.Rdoublenullablee_rmag[0.0001/2.2]? Error on the r-band magnitude (r_err)magstat.error;phot.magdoublenullableimag[11.87/23.73]? i-band (AB) magnitude (i_mag) (5)magphot.mag;em.opt.Idoublenullablee_imag[0.0001/4.6]? Error on the i-band magnitude (i_err)magstat.error;phot.magdoublenullablezmag[11.88/23.8]? z-band (AB) magnitude (z_mag) (5)magphot.mag;em.opt.Idoublenullablee_zmag[0.0001/0.7]? Error on the z-band magnitude (z_err)magstat.error;phot.magdoublenullableRefSource of optical photometry (opt_src) (6)meta.bibcharW1mag[10/18.71]? WISE W1 (3.4um) band magnitude (W1) (7)magphot.mag;em.IR.3-4umdoublenullablee_W1mag[0.02/0.5]? Error on the WISE W1 (3.4um) band magnitude (W1sig)magstat.error;phot.magdoublenullableW2mag[9.79/17.26]? WISE W2 (4.6um) band magnitude (W2) (7)magphot.mag;em.IR.4-8umdoublenullablee_W2mag[0.01/0.6]? Error on the WISE W2 (4.6um) band magnitude (W2sig)magstat.error;phot.magdoublenullableW3mag[6.6/12.9]? WISE W3 (12um) band magnitude (W3) (7)magphot.flux.density;em.IR.8-15umdoublenullablee_W3mag[0.01/0.6]? Error on the WISE W3 (12um) band magnitude (W3sig)magstat.error;phot.magdoublenullableW4mag[3.6/9.4]? WISE W4 (22um) band magnitude (W4) (7)magphot.flux.density;em.IR.15-30umdoublenullablee_W4mag[0.02/0.6]? Error on the WISE W4 (22um) band magnitude (W4sig)magstat.error;phot.magdoublenullableR-W1[-2.6/7.7]? R-W1 (Vega) color index (R-W1)magphot.color;em.opt;em.IRdoublenullableW1-W2[-0.5/2.8]? W1-W2 color index (W1-W2)magphot.color;em.IR;em.IRdoublenullableAGN75AGN selection at the 75% reliability threshold (WISE_AGN_75) (8)meta.codecharAGN90AGN selection at the 90% reliability threshold (WISE_AGN_90) (8)meta.codecharF0.5-2[0/5.2e-13]? X-ray flux in the 0.5-2keV band from LaMassa+ (2016, J/ApJ/817/172) (Soft_flux)mW.m**-2phot.flux;em.X-ray.softdoublenullableSdet[0/7556]? Significance of X-ray detection in the soft band (Soft_DETML) (9)stat.likelihood;obsdoublenullableLx0.5-2[39.87/45.61]? Log of the k-corrected soft-band X-ray luminosity (Soft_Lum) (10)log(1e-07W)phys.luminosity;em.X-raydoublenullableF2-10[0/1.3e-12]? X-ray flux in the 2-10 (2-7) keV band for XMM-Newton (Chandra) sources from LaMassa+ (2016, J/ApJ/817/172) (Hard_flux)mW.m**-2phot.flux;em.X-ray.harddoublenullableHdet[0/2165]? Significance of X-ray detection in the hard band (Hard_DETML) (9)stat.likelihood;obsdoublenullableLx2-10[41.05/45.84]? Log of the k-corrected hard-band X-ray luminosity (Hard_Lum) (10)log(1e-07W)phys.luminosity;em.X-raydoublenullableF0.5-10[0/1.7e-12]? X-ray flux in the 0.5-10 (0.5-7) keV band for XMM-Newton (Chandra) sources from LaMassa+ (2016, J/ApJ/817/172) (Full_flux)mW.m**-2phot.flux;em.X-raydoublenullableFdet[0/9276]? Significance of X-ray detection in the full band (Full_DETML) (9)stat.likelihood;obsdoublenullableLx0.5-10[40.37/45.94]? Log of the k-corrected full-band X-ray luminosity (Full_Lum) (10)log(1e-07W)phys.luminosity;em.X-raydoublenullableLx[40.19/45.84]? Estimate of the k-corrected 2-10keV X-ray luminosity (Xray_Lum) (11)log(1e-07W)phys.luminosity;em.X-raydoublenullableAGNxX-ray AGN if Lx>10^42^erg/s (Xray_AGN)meta.codecharlogNII/Ha[-1.32/0.21]? Logarithm of the [NII]6584{AA}/H{alpha} ratio (NII_6584/H_alpha) (12)spect.line.intensity;arith.ratiodoublenullablelogOIII/Hb[-0.76/1.22]? Logarithm of the [OIII]5007{AA}/H{alpha} ratio (OIII_5007/H_beta) (12)spect.line.intensity;arith.ratiodoublenullableClassBPT classification of sources (BPT_Classification) (13)src.classcharL16Display data from LaMassa+, 2016, J/ApJ/817/172 within 3"meta.ref.urlintnullableA17Display data from Ananna+, 2017, J/ApJ/850/66 within 3"meta.ref.urlintnullableA18meta.ref.urlintnullableWISEADisplay data from the AllWISE catalog (II/328) within 2"meta.ref.urlcharNEDNED column added by the CDSmeta.ref.urlchar