J/A+A/501/485ivo://CDS.VizieR/J/A+A/501/485doi:10.26093/cds/vizier.35010485CDSCampisi M.A.Vignali C.Brusa M.Daddi E.Comastri A.Pozzetti L.,Alexander D.M.Renzini A.Arimoto N.Kong X.2009-11-07T21:14:15Z2009-11-07T22:05:32ZCDS support team

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

cds-question@unistra.frx-ray-sourcesinfrared-sourcesgalaxiesphotometryWe present the X-ray properties of the extremely red objects (ERO) population observed by Chandra with three partially overlapping pointings (up to ~90ks) over an area of ~500arcmin^2^, down to a 0.5-8keV flux limit of ~10-15erg/cm^2^/s. We selected EROs using a multi-band photometric catalog down to a Ks-band magnitude of ~19.3 (Vega system); 14 EROs were detected in X-rays, corresponding to ~9% of the overall X-ray source population (149 X-ray sources) and to ~5% of the ERO population (288). The X-ray emission of all X-ray detected EROs is consistent with that of an active galactic nucleus (AGN) (>~3.5x10^42^erg/s at photometric redshifts z>1), in agreement with previous X-ray observations, with an indication of increasing absorption between the three X-ray brightest EROs and the 11 X-ray faintest EROs.2009A&A...501..485Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/501/485CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/chandra : The Chandra Archive Log (CXC, 1999-)J/MNRAS/330/1 : HST observations of Extremely Red Objects (Smith+, 2002)J/ApJ/581/844 : Radio and Infrared observations of EROs (Smail+, 2002)J/PASJ/55/1079 : BVRi'z'JHKs photometry of ERO objects (Miyazaki+, 2003)J/ApJ/586/765 : HST K-selected extremely red galaxies (Yan+, 2003)J/MNRAS/377/787 : SDSS Luminous Red Galaxies (Barber+, 2007)J/AJ/130/2647 : Tidal features of 126 nearby red galaxies (van Dokkum+ 2005)J/ApJ/627/621 : Catalog of Extremely Red Objects (Sawicki+, 2005)J/MNRAS/354/L25 : MgII absorbers in SDSS QSOs (Bouche+, 2004)J/MNRAS/380/1608 : LRG catalog (Lopes+, 2007)J/MNRAS/381/211 : Radio galaxies in the 2SLAQ LRG Survey (Sadler+, 2007)J/MNRAS/392/1265 : Coma cluster faint red galaxies spectroscopy (Smith+, 2009)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/501/485https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/501/485http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/501/485https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/501/485https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/501/485http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/501/485GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/501/485/tablea1 (X-ray properties of the sources detected by Chandra in the "Daddi field")https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/501/485/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/501/485/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/501/485/tablea1?GETtext/xml+votable180.050000true222.123849.04250.0055555555555555566/8339https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/501/485?format=asciiX-rayOpticalInfrareddefaultJ/A+A/501/485/tablea1X-ray properties of the sources detected by Chandra in the "Daddi field"l_HRLimit flag on HRmeta.code.errorcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintXIDX-ray identification number in the Chandra mosaicmeta.id;meta.mainintRAJ2000Right ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainthetaOff-axis angle at the source position averaged over the Chandra observationsarcmininstr.offsetfloatCountsSource net counts in the 0.5-8keV bandctphot.count;em.X-rayfloatn_Counts[hs] s when counts in 0.5-2keV band, h when counts in 2-8kev bandmeta.notecharExpTimeExposure time at the source positionkstime.duration;obs.exposurefloatF(0.5-8)? Flux in the 0.5-8keV band (1)mW.m**-2phot.flux;em.X-raydoublenullablel_F(0.5-2)Limit flag on F(0.5-2) (2)meta.code.errorcharF(0.5-2)? Flux in the soft 0.5-2keV band (1)mW.m**-2phot.flux;em.X-raydoublenullablel_F(2-8)Limit flag on F(2-8) (2)meta.code.errorcharF(2-8)? Flux in the hard 2-8keV band (1)mW.m**-2phot.flux;em.X-raydoublenullablen_F(2-8)[h] h when flux in the 2-10keV bandmeta.notecharHR? Hardness ratio (H-S/H+S)phot.fluxfloatnullablee_HR? rms uncertainty on HRstat.errorfloatnullable