J/AJ/123/2223ivo://CDS.VizieR/J/AJ/123/2223doi:10.26093/cds/vizier.51232223CDSStern D.Tozzi P.Stanford S.A.Rosati P.Holden B.Eisenhardt P.,Elston R.Wu K.L.Connolly A.Spinrad H.Dawson S.Dey A.Chaffee F.H.2023-04-06T16:50:47Z2007-06-12T11:57:47ZCDS support team

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

cds-question@unistra.frsurveysx-ray-sourcesgalaxiescatalogsphotometryWe present our first results on field X-ray sources detected in a deep, 184.7ks observation with the Advanced CCD Imaging Spectrometer (ACIS-I) on the Chandra X-Ray Observatory. The observations target the Lynx field (RA=08h48min, DE=+44{deg}54') of SPICES, the Spectroscopic Photometric Infrared-Chosen Extragalactic Survey, which contains three known X-ray-emitting clusters at redshifts of z=0.57, 1.26, and 1.27. Not including the known clusters, in the 17'x17' ACIS-I field we detect 132 sources in the 0.5-2keV (soft) X-ray band down to a limiting flux of ~1.7x10^-16^ergs/cm^2^/s and 11 sources in the 2-10keV (hard) X-ray band down to a limiting flux of ~1.3x10^-15^ergs/cm^2^/s. The combined catalog contains a total of 153 sources, of which 42 are detected only in the soft band and 21 are detected only in the hard band. Confirming previous Chandra results, we find that the fainter sources have harder X-ray spectra, providing a consistent solution to the long-standing "spectral paradox." From deep optical and near-infrared follow-up data, 77% of the X-ray sources have optical counterparts to I=24, and 71% of the X-ray sources have near-infrared counterparts to Ks=20. Four of the 24 sources in the near-IR field are associated with extremely red objects (EROs; I-Ks>=4). We have obtained spectroscopic redshifts with the Keck telescopes of 18 of the Lynx Chandra sources. These sources comprise a mix of broad-lined active galaxies, apparently normal galaxies, and two late-type Galactic dwarfs. Intriguingly, one Galactic source is identified with an M7 dwarf exhibiting nontransient, hard X-ray emission. Thirteen of the Chandra sources are located within regions for which we have Hubble Space Telescope imaging. Nine of the sources are detected, showing a range of morphologies: several show compact cores embedded within diffuse emission, while others are spatially extended showing typical galaxy morphologies. Two of the Chandra sources in this subsample appear to be associated with mergers. We briefly review non-active galactic nucleus mechanisms to produce X-ray emission and discuss properties of the Lynx Chandra sample in relation to other samples of X-ray and non-X-ray sources.2002AJ....123.2223Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/123/2223CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/chandra : The Chandra Archive Log (CXC, 2002)J/A+A/379/740 : ESO Imaging Survey (EIS) (Arnouts+, 2001)J/A+AS/71/221 : The 65W part of the WSRT 21 cm survey in Lynx (Oort, 1987)J/A+AS/73/103 : The 64W part of the WSRT 92 cm survey in Lynx (Oort, 1988)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/123/2223https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/123/2223http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/123/2223https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/123/2223https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/123/2223http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/123/2223GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/123/2223/table1 (X-ray source properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/123/2223/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/123/2223/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/123/2223/table1?GETtext/xml+votable180.050000true132.4322545.00655560.005555555555555556Chandra6/6495 7178https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/123/2223?format=asciiX-rayOpticaldefaultJ/AJ/123/2223/table1X-ray source propertiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[STS2002]Sequential numbermeta.id;meta.mainintprimaryRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainScounts? Counts in the soft band (0.5-2keV)ctphot.count;em.X-rayfloatnullablee_Scounts? rms uncertainty on Scountsctstat.errorfloatnullableHcounts? Counts in the hard band (2-7keV)ctphot.count;em.X-rayfloatnullablee_Hcounts? rms uncertainty on Hcountsctstat.errorfloatnullableHR? Hardness ratio (H-S)/(H+S)phot.flux;arith.ratiofloatnullableS/NSignal-to-noise ratio of the X-ray detectionstat.snrfloatDistOff-axis angle of the X-ray source (1)arcminfloatS0.5-2keV? Flux in the soft band (0.5-2keV)1e-18W.m**-2phot.flux;em.X-ray.softfloatnullableS2-10keV? Flux in the hard band (2-10keV)1e-18W.m**-2phot.flux;em.X-ray.hardfloatnullableJ/AJ/123/2223/table2Optical/Near-IR Properties of X-Ray SourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[STS2002]Source identification numbermeta.id;meta.mainintf_[STS2002][a] Flag on [STS2002] (1)meta.codecharoRA? X-ray minus optical right ascension offsetarcsecpos.eq.ra;arith.difffloatnullablef_oRA[u] Indicates undetected sourcemeta.codecharoDE? X-ray minus optical declination offsetarcsecpos.eq.dec;arith.difffloatnullablef_oDE[u] Indicates undetected sourcemeta.codecharBmag? The Harris B band magnitude (3)magphot.mag;em.opt.Bfloatnullablef_Bmag[u] Indicates undetected sourcemeta.codecharRmag? The Harris R band magnitude (3)magphot.mag;em.opt.Rfloatnullablef_Rmag[u] Indicates undetected sourcemeta.codecharu_Rmag[:] Indicates Rmag somewhat affected by nearby stellar bleed trailmeta.code.errorcharImag? The Harris I band magnitude (3)magphot.mag;em.opt.Ifloatnullablef_Imag[u] Indicates undetected sourcemeta.codecharzmag? The RG850 long-pass z band magnitudemagphot.mag;em.opt.Ifloatnullablef_zmag[u] Indicates undetected sourcemeta.codecharJmag? The J band magnitude (4)magphot.mag;em.IR.Jfloatnullablef_Jmag[u] Indicates undetected sourcemeta.codecharKsmag? The K_s_ band magnitude (4)magphot.mag;em.IR.Kfloatnullablef_Ksmag[u] Indicates undetected sourcemeta.codecharz? Spectroscopic redshiftsrc.redshiftfloatnullablef_z[u] Indicates undetected sourcemeta.codecharSIDThe SPICES identificationmeta.id.assoccharJ/AJ/123/2223/table3Luminosities of X-ray sourceszRedshiftsrc.redshiftfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[STS2002]Sequential numbermeta.id;meta.mainintBMAG:E? EdS rest-frame absolute B magnitude (1)magphys.magAbs;em.opt.Bfloatnullablelog(L0.5-2keV)E? EdS 0.5-2keV band luminosity (1)log(solLum)phys.luminosityfloatnullablelog(L2-10keV)E? EdS 2-10keV band luminosity (1)log(solLum)phys.luminosityfloatnullableBMAG:L? {Lambda} rest-frame absolute B magnitude (1)magphys.magAbs;em.opt.Bfloatnullablelog(L0.5-2keV)L? {Lambda} 0.5-2keV band luminosity (1)log(solLum)phys.luminosityfloatnullablelog(L2-10keV)L? {Lambda} 2-10keV band luminosity (1)log(solLum)phys.luminosityfloatnullableClassGalaxy class or spectral type for starssrc.classchar