J/ApJS/148/275ivo://CDS.VizieR/J/ApJS/148/275doi:10.26093/cds/vizier.21480275CDSAkiyama M.Ueda Y.Ohta K.Takahashi T.Yamada T.2004-03-28T18:37:46Z2004-03-28T18:37:38ZCDS support team

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

cds-question@unistra.frx-ray-sourcesactive-galactic-nucleiinfrared-photometryline-intensitiesWe present the results of optical spectroscopic identifications of a bright subsample of 2-10keV hard X-ray-selected sources from the ASCA Medium Sensitivity Survey in the northern sky (AMSSn). The flux limit of the subsample is 3x10^-13^erg/s/cm^2^ in the 2-10keV band. All but one of the 87 hard X-ray-selected sources are optically identified, with AGNs (including broad-line AGNs, narrow-line AGNs, and three BL Lac objects), seven clusters of galaxies, and one galactic star. It is the largest complete sample of hard X-ray-selected AGNs at the bright flux limit. Amounts of absorption to their nuclei are estimated to be hydrogen column densities (NH) of up to 3x10^23^cm^-2^ from their X-ray spectra. Optical properties of X-ray absorbed AGNs with N_H_>1x10^22^cm^-2^ indicate the effects of dust absorption: at redshifts z<0.6, AGNs without broad H{beta} emission lines have significantly larger NH-values than AGNs with broad H{beta} emission lines. At z>0.6, the X-ray absorbed AGNs have a large hard X-ray to optical flux ratio (logf_2-10keV_/f_R_>+1). However, three X-ray absorbed z>0.6 AGNs show strong broad lines. In combination with hard X-ray-selected AGN samples from the ASCA Large Sky Survey, the ASCA Deep Survey in the Lockman Hole, and Chandra Deep Field North, the luminosity distributions of absorbed (N_H_>1x10^22^cm^-2^) and less-absorbed (N_H_<1x10^22^cm^-2^) AGNs are compared.2003ApJS..148..275Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/148/275CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/PASJ/53/445 : ASCA Deep survey in Lockman Hole Field (Ishisaki+, 2001)J/AJ/126/632 : UBVRIz'HK' photometry of 2Ms CDFN X-ray sources (Barger+, 2003)J/AJ/126/539 : The Chandra Deep Fields North and South (Alexander+, 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/148/275https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/148/275http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/148/275https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/148/275https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/148/275http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/148/275GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/148/275/table1 (Candidates of optical counterparts and results of identifications)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/148/275/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/148/275/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/148/275/table1?GETtext/xml+votable180.050000true1.522583320.52420.0055555555555555566/4341 4438 5116 5439 6035 7763 8299 8787 8906 8914 8927 9175 9181 9194 9460 9654 9711 10055 10293 10422 10691 10739 10773 10774 11290 11399 11408 11614 11615 11632 11664 11730 12024 12025 12155 12241 17121 17124 17369 17537 17730 17896 18780 19569 19842 19847 19883 19991 20071 20090 20263 20286 22651 22721 23132 25610 25675 26022 26264 26277 26923 27715 27721 27862 28141 28334 28517 28518 31652 32484 32486 36323 36341 36343 44787 44793 49113https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/148/275?format=asciiX-rayInfrareddefaultJ/ApJS/148/275/table1Candidates of optical counterparts and results of identificationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint1AXG1AXG designation (JHHMMSS+DDMM)meta.id;meta.maincharprimaryIDIdentification numbermeta.idcharDetDetection significance in the GIS 2-10keV bandstat.fit.goodnessfloatRAJ2000X-ray Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000X-ray Declination (J2000.0)pos.eq.dec;meta.mainerrPosUncertainty of the X-ray source positionarcminstat.errorfloatNoptIdentification number of the optical objectmeta.idcharRAoOptical Right ascension (J2000.0)pos.eq.raDEoOptical Declination (J2000.0)pos.eq.decOffsetDistance between X-ray and optical sourcesarcminpos.angDistancefloatRmag? R magnitude from APM catalog, unless otherwise notedmagphot.mag;em.opt.Rfloatnullablen_Rmag[lm] Note on Rmag (3)meta.notecharSelectSelection mode of candidates of optical counterparts (4)meta.refcharClassClassification of the optical objectsrc.classcharz? Redshift of the optical objectssrc.redshiftfloatnullableu_z[?] Uncertainty flag on zmeta.code.errorcharJ/ApJS/148/275/table2Apparent properties of identified objectsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint1AXG1AXG designation (JHHMMSS+DDMM)meta.id;meta.maincharIDIdentification numbermeta.idcharClassClassification of the optical counterpartsrc.classcharNHGalactic hydrogen column density estimated from the H I map by Dickey & Lockman, 1990ARA&A..28..215D1e+20cm**-2phys.columnDensityfloatHCRHard (2-10keV) band count rate (1)ct/ksphot.count;em.X-rayfloate_HCRrms uncertainty on HCRct/ksstat.errorfloatSCRSoft (0.7-2keV) band count rate (1)ct/ksphot.count;em.X-rayfloate_SCRrms uncertainty on SCRct/ksstat.errorfloatGamma0.7-10keV band apparent photon index determined from hardness ratio, HR=(H-S)/(H+S)spect.indexfloate_Gammarms uncertainty on Gammastat.errorfloatRmag? R magnitude of optical counterpartmagphot.mag;em.opt.Rfloatnullablel_JmagLimit flag on Jmagmeta.code.errorcharJmag? J magnitude of optical counterpartmagphot.mag;em.IR.Jfloatnullablen_Jmag[NC ] NC: position is not covered in the second incremental 2MASS catalogmeta.notecharl_HmagLimit flag on Jmagmeta.code.errorcharHmag? H magnitude of optical counterpartmagphot.mag;em.IR.Hfloatnullablen_Hmag[NC ] NC: position is not covered in the second incremental 2MASS catalogmeta.notecharl_KsmagLimit flag on Jmagmeta.code.errorcharKsmag? Ks magnitude of optical counterpartmagphot.mag;em.IR.Kfloatnullablen_Ksmag[NC ] NC: position is not covered in the second incremental 2MASS catalogmeta.notecharF1.4GHz? Radio flux in the 1.4GHz from NVSS, unless otherwise notedmJyphot.flux.density;em.radio.750-1500MHzfloatnullablen_F1.4GHz[hij] Note on radio flux (3)meta.notecharJ/ApJS/148/275/table3Physical properties of identified objects or absolute properties of identified objectsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint1AXG1AXG designation (JHHMMSS+DDMM)meta.id;meta.maincharIDIdentification numbermeta.idcharClassClassification of the optical counterpartsrc.classcharlogLHX? Object-frame absorption-corrected 2-10keV logarithmic luminosity (1)log(1e-07W)phys.luminosity;em.X-rayfloatnullablelogNH? Best-fit object-frame logarithmic hydrogen column density of absorbed power-law modellog(cm**-2)phys.columnDensityfloatnullableVMAG? Absolute V magnitudemagphys.magAbs;em.optfloatnullablel_logL1.4GHzLimit flag on logL1.4GHzmeta.code.errorcharlogL1.4GHzRadio luminosity at 1.4GHzlog(W.Hz**-1)phys.luminosity;em.radiofloatl_logR8.4GHzLimit flag on logP8.4GHzmeta.code.errorcharlogR8.4GHzRadio-to-optical luminosity ratio (2)phys.luminosity;arith.ratiofloatJ/ApJS/148/275/table4Optical emission-line properties of identified objectsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint1AXG1AXG designation (JHHMMSS+DDMM)meta.id;meta.maincharIDIdentification numbermeta.idcharl_EW[OIII]Limit flag on EW[OIII] (1)meta.code.errorcharEW[OIII]? Equivalent width of [O III] {lambda}5007 line0.1nmspect.line.eqWidthfloatnullablee_EW[OIII]? rms uncertainty on EW[OIII]0.1nmstat.errorfloatnullablel_EWHbNLimit flag on l_EWHbN (1)meta.code.errorcharEWHbNEquivalent width of narrow H{beta} line0.1nmspect.line.eqWidthfloate_EWHbN? rms uncertainty on EWHbN0.1nmstat.errorfloatnullablel_EWHbBLimit flag on EWHbB (1)meta.code.errorcharEWHbBEquivalent width of broad H{beta} line0.1nmspect.line.eqWidthfloate_EWHbB? rms uncertainty on EWHbB0.1nmstat.errorfloatnullablel_EW[NII]Limit flag on EW[NII] (1)meta.code.errorcharEW[NII]? Equivalent width of [N II] {lambda}6583 line0.1nmspect.line.eqWidthfloatnullablee_EW[NII]? rms uncertainty on EW[NII]0.1nmstat.errorfloatnullablel_EWHaNLimit flag on EWHaN (1)meta.code.errorcharEWHaN? Equivalent width of narrow H{alpha} line0.1nmspect.line.eqWidthfloatnullablee_EWHaN? rms uncertainty on EWHaN0.1nmstat.errorfloatnullablel_EWHaB? Limit flag on l_EWHaB (1)meta.code.errorcharEWHaB? Equivalent width of broad H{alpha} line0.1nmspect.line.eqWidthfloatnullablee_EWHaB? rms uncertainty on EWHaB0.1nmstat.errorfloatnullablel_RabLimit flag on Rabmeta.code.errorcharRab? H{alpha} to H{beta} broad emission-line equivalent width ratiospect.line.intensity;arith.ratiofloatnullablee_Rab? rms uncertainty on Rabstat.errorfloatnullablel_FWHM[OIII]Limit flag on FWHM[OIII] {lambda}5007meta.code.errorcharFWHM[OIII]FWHM of [O III] linekm/sspect.line.widthintFWHMHbB? FWHM of H{beta} linekm/sspect.line.widthintnullableFWHMHaB? FWHM of H{alpha} linekm/sspect.line.widthintnullable