J/MNRAS/366/171ivo://CDS.VizieR/J/MNRAS/366/171doi:10.26093/cds/vizier.73660171CDSGeorgakakis A.E.Georgantopoulos I.Akylas A.2024-07-02T20:16:55Z2006-10-11T17:53:36ZCDS support team

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

cds-question@unistra.frsurveysx-ray-sourcesactive-galactic-nucleiIn this paper we combine archival and proprietary XMM-Newton observations (about 5deg^2^) that overlap with the Sloan Digital Sky Survey to explore the nature of the moderate-z X-ray population. We focus on X-ray sources with optically red colours (g-r>0.4), which we argue are important for understanding the origin of the X-ray background (XRB).2006MNRAS.366..171Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/366/171CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-tohttp://www.sdss.org/ : SDSS Home PageJ/A+A/432/69 : Extremely Red Objects XMM-Newton observations (Brusa+, 2005)J/MNRAS/349/135 : XMM-Newton/2dF survey. II. (Georgakakis+, 2004)J/MNRAS/352/91 : XMM-Newton/2dF survey. IV. (Georgantopoulos+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/366/171https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/366/171http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/366/171https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/366/171https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/366/171http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/366/171GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/366/171/table1 (Optical and X-ray properties of the hard X-ray selected sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/366/171/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/366/171/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/366/171/table1?GETtext/xml+votable180.050000true10.95929170.96389170.0055555555555555566/7242-7243 7280-7281 7308-7310 7552 11347 11353 11596 11791 11932-11933 11936 17300 17749 17817 17819 17840-17842 18114 18800 23191 23210 26019-26020 26022-26023 26028 26175 36785https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/366/171?format=asciiX-raydefaultJ/MNRAS/366/171/table1Optical and X-ray properties of the hard X-ray selected samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[GGA2006]Sequential numbermeta.recordintn_[GGA2006]Note on [GGA2006] (1)meta.notecharRAJ2000X-ray Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainrmagr magnitudemagphot.mag;em.opt.Rfloatl_PLimit flag on Pmeta.code.errorcharPProbability that the optical counterpart is a chance coincidence%stat.fit.goodnessfloatFXX-ray flux in the 2-8keV band1e-17W.m**-2phot.flux;em.X-rayfloate_FXrms uncertainty on FX1e-17W.m**-2stat.errorfloatlogFX/FoptX-ray-to-optical flux ratiophot.flux;arith.ratiofloatzsp? Spetroscopic redshiftsrc.redshiftfloatnullableSpClassSpetroscopic classification (2)meta.code.class;src.classcharzph? Photometric redshiftsrc.redshiftfloatnullablelogLXX-ray luminosity in the 2-8keV band, corrected for X-ray absorptionphys.luminosity;em.X-rayfloatl_NHLimit flag on NHmeta.code.error;phys.columnDensitycharNH? Rest-frame hydrogen column density1e+22cm**-2phys.columnDensityfloatnullableE_NH? Error on NH (upper limit)1e+22cm**-2stat.error;stat.maxfloatnullablee_NH? Error on NH (lower limit)1e+22cm**-2stat.error;phys.columnDensityfloatnullableGamma? Power-law spectral indexspect.indexfloatnullableE_Gamma? Error on Gamma (upper limit)stat.error;stat.maxfloatnullablee_Gamma? Error on Gamma (lower limit)stat.errorfloatnullableSDSSdataDisplay the SDSS data for this galaxymeta.ref.urlchar