J/A+A/689/A83ivo://CDS.VizieR/J/A+A/689/A83doi:10.26093/cds/vizier.36890083CDSMiyaji TBravo-Navarro B.A.Diaz Tello J.Krumpe M.Herrera-Endoqui M.,Ikeda H.Takagi T.Oi N.Shogaki A.Matsuura S.Kim H.MalkanM.A.,Hwang H.S.Kim T.Ishigaki T.Hanami H.Kim S.J.Ohyama Y.Goto T.,Matsuhara H.2024-11-29T20:06:04Z2024-09-04T08:06:23ZCDS support team

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

cds-question@unistra.frsurveysactive-galactic-nucleix-ray-sourcesseyfert-galaxiesgalaxiesspectroscopycatalogsquasarsredshiftedWe present a catalog of optical and infrared identifications (ID) of X-ray sources in the {AKARI} North Ecliptic Pole (NEP) Deep field detected with Chandra covering ~0.34deg^2^ with 0.5-2keV flux limits ranging ~2-20*10^-16^erg/s/cm^2^. The optical/near-infrared counterparts of the X-ray sources are taken from our Hyper Suprime Cam (HSC)/Subaru and Wide-Field InfraRed Camera (WIRCam)/Canada-France-Hawaii Telescope (CFHT) data because these have much more accurate source positions due to their spatial resolution than that of Chandra and longer wavelength infrared data. We concentrate our identifications in the HSC g band and WIRCam Ks band-based catalogs. To select the best counterpart, we utilize a novel extension of the likelihood-ratio (LR) analysis, where we use the X-ray flux as well as g-Ks colors to calculate the likelihood ratio. Spectroscopic and photometric redshifts of the counterparts are summarized. Also, simple X-ray spectroscopy is made on the sources with sufficient source counts. We present the resulting catalog in an electronic form. The main ID catalog contains 403 X-ray sources and includes X-ray fluxes, luminosities, g and Ks band magnitudes, redshifts and their sources, optical spectroscopic properties, as well as intrinsic absorption column densities and power-law indices from simple X-ray spectroscopy. The identified X-ray sources include 27 Milky-Way objects, 57 type I AGNs, 131 other AGNs, and 15 galaxies. The catalog serves as a basis for further investigations of the properties of the X-ray and near-infrared sources in this field. We present a catalog of optical g band and near-infrared (Ks band identifications of Chandra X-ray sources in the AKARI NEP Deep field with available optical/near-infrared spectroscopic features and redshifts as well as the results of simple X-ray spectroscopy. During the process, we develop a novel X-ray flux-dependent likelihood-ratio analysis for selecting the most likely counterparts among candidates.2024A&A...689A..83Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/689/A83CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/446/911 : X-ray sources in the AKARI NEP deep field (Krumpe+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/689/A83https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/689/A83http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/689/A83https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/689/A83https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/689/A83http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/689/A83GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/689/A83/table2 (Main ID table listing the first candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/689/A83/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/689/A83/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/689/A83/table2?GETtext/xml+votable180.050000true269.2473366.563930.005555555555555556Cone search capability for table J/A+A/689/A83/table3 (Second and third candidates above the LR threshold)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/689/A83/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/689/A83/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/689/A83/table3?GETtext/xml+votable180.050000true268.9500766.845070.005555555555555556Cone search capability for table J/A+A/689/A83/tablea2 (Results of associated optical spectroscopic programs using the Gran Telescopio Canarias (GTC) and Large Binocular Telescope (LBT))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/689/A83/tablea2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/689/A83/tablea2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/689/A83/tablea2?GETtext/xml+votable180.050000true269.3093666.58050.0055555555555555566/11605 116077.952274030004205e-20 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/689/A83?format=asciiX-raydefaultJ/A+A/689/A83/table2Main ID table listing the first candidatesr_PosIDReference for first ID candidate position (Ga for Gaia, HSC or Ks for WIRCam)meta.ref;pos.framecharRAIdegRight ascension (J2000) of the first ID candidatedegpos.eq.raDEIdegDeclination (J2000) of the first ID candidatedegpos.eq.decIDSepSeparation from X-ray positionarcsecpos.angDistancefloatgmag? HSC g magnitude (AB)magphot.mag;em.opt.Bfloatnullablee_gmag? HSC g magnitude errormagstat.error;phot.magdoublenullableKsmag? WIRCam Ks magnitude (AB)magphot.mag;em.IR.Kfloatnullablee_Ksmag? WIRCam Ks magnitude errormagstat.error;phot.magdoublenullabler_zspReference of zsp (2)meta.ref;pos.framecharClassObject class (CLASS)meta.code.classcharComOptIRComments from opt/IRmeta.notecharComXComments for X-ray Spectroscopymeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCXONameX-ray source name (ANEPD-CXONNN)meta.id;meta.maincharRAJ2000X-ray source right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000X-ray source declination (J2000)degpos.eq.dec;meta.mainePosX-ray source position errorarcsecstat.error;posfloatF05-7X-ray flux in 0.5-7keV bandmW.m**-2phot.flux;em.X-raydoublee_F05-7X-ray flux 1 sigma error 0.5-7keV bandmW.m**-2stat.errordoubleF05-2X-ray flux in 0.5-2keV bandmW.m**-2phot.flux;em.X-raydoublee_F05-2X-ray flux 1 sigma error in 0.5-2keV bandmW.m**-2stat.errordoubleF2-7X-ray flux in 2-7keV bandmW.m**-2phot.flux;em.X-raydoublee_F2-7X-ray flux 1 sigma error in 2-7keV bandmW.m**-2stat.errordoubleGmag? Gaia G magnitudemagphot.mag;em.optfloatnullableGaiaMW[false/true ] MW flag based on Gaia (G1)meta.codecharzsp? Spectroscopic redshiftsrc.redshiftdoublenullableq_zspSpectroscopic redshift quality flag (1)meta.code.qualcharzph? Best fit photo-z from Oi et al., 2021MNRAS.500.5024Osrc.redshift.photfloatnullablezphMod? Best fit template ID from Oi et al., 2021MNRAS.500.5024Ometa.id;stat.fitintnullableznom? Adopted nominal redshift (3)src.redshift;pos.heliocentricdoublenullableNH? Intrinsic N_H from X-ray spectro1e+22cm**-2phys.columnDensitydoublenullableb_NH? Lower bound to NH 90% error1e+22cm**-2stat.error;stat.mindoublenullableB_NH? Upper bound to NH 90% error1e+22cm**-2stat.error;stat.maxfloatnullableGamma? Photon index of the Chandra sourcemeta.code;spect.indexfloatnullablelogLXraw? Log raw 0.5-7keV luminositylog(1e-07W)phys.luminosity;em.X-ray.mediumfloatnullablelogLXint? Log intrinsic 2-10keV luminosity (4)log(1e-07W)phys.luminosity;em.X-ray.mediumfloatnullableb_logLXint? Lower bound to logLXint 90% errorlog(1e-07W)stat.error;stat.minfloatnullableB_logLXint? Upper bound to logLXint 90% errorlog(1e-07W)stat.error;stat.maxfloatnullableLRLikelihood ratiostat.likelihood;arith.ratiodoubleJ/A+A/689/A83/table3Second and third candidates above the LR thresholdrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCXONameName of the X-ray source (ANEPD-CXONNN)meta.id;meta.maincharr_PosReferece to positions (Ga for Gaia, HSC)meta.ref;pos.framecharRAJ2000Right ascension (J2000) of this ID candidatedegpos.eq.ra;meta.mainDEJ2000Declination (J2000) of this ID candidatedegpos.eq.dec;meta.mainIDSep? Separation from X-ray positionarcsecpos.angDistancefloatnullablegmag? HSC g magnitude (AB)magphot.mag;em.opt.Bfloatnullablee_gmag? HSC g magnitude errormagstat.error;phot.magfloatnullableKsmag? WIRCam Ks magnitude (AB)magphot.mag;em.IR.Kfloatnullablee_Ksmag? WIRCam Ks magnitude errormagstat.error;phot.magfloatnullableGmag? Gaia G magnitudemagphot.mag;em.optfloatnullableGaiaMW[false/true ] MW flag based on Gaia (G1)meta.codecharLR? Likelihood ratio (LR)stat.likelihood;arith.ratiodoublenullableRankLR rank for the X-ray sourcemeta.codeintJ/A+A/689/A83/tablea2Results of associated optical spectroscopic programs using the Gran Telescopio Canarias (GTC) and Large Binocular Telescope (LBT)Tel/InstTelescope/Instrumentmeta.notecharzspSpectroscopic redshiftsrc.redshiftfloatClassObject flag from spectroscopy (G2)meta.codecharSepSepartion between slit and catalog positionsarcsecpos.angDistancefloatComComments/Identfied features in spectruminstr.setupcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObjectIDObject name (1)meta.id;meta.maincharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainMaskIDMask IDmeta.id;instrcharq_zspQuality Flag to zsp (2)meta.code.qualchar