J/ApJ/690/295ivo://CDS.VizieR/J/ApJ/690/295doi:10.26093/cds/vizier.16900295CDSKocevski D.D.Lubin L.M.Gal R.Lemaux B.C.Fassnacht C.D.,Squires G.K.2017-12-12T06:35:11Z2011-03-07T12:24:43ZCDS support team

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

cds-question@unistra.frgalaxy-clustersx-ray-sourcesredshiftedastronomical-object-identificationWe present the results of Chandra observations of the Cl1604 supercluster at z~0.9. The system is the largest structure mapped at redshifts approaching unity, containing at least eight spectroscopically confirmed galaxy clusters and groups. Using two 50ks ACIS-I pointings we examine both the X-ray point-source population and the diffuse emission from individual clusters in the system. Over an area encompassing the entire supercluster (~0.154deg^2^), we find a 2.5{sigma} excess of point sources detected in the hard band (2-10keV) relative to the number of sources found in blank fields observed by Chandra. No such excess is observed in the soft band (0.5-2keV). The hard-band source density is 1.47 times greater than that of a blank field, in agreement with the previously reported correlation between overdensity amplitude and cluster redshift. Using a maximum likelihood technique, we have matched 112 of the 161 detected X-ray point sources to optical counterparts and found 15 sources that are associated with the supercluster. All 15 sources have rest-frame luminosities consistent with emission from active galactic nuclei (AGNs).2009ApJ...690..295Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/690/295CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/chandra : The Chandra Archive Log (CXC, 1999-)J/AJ/116/560 : Cl J0023+0423 and Cl J1604+4304 spectroscopy (Postman+ 1998)J/AJ/116/584 : Cl J0023+0423 and Cl J1604+4304 morphology (Lubin+ 1998)J/AJ/122/2222 : Superclusters of Abell and X-ray clusters (Einasto+, 2001)J/ApJS/150/19 : ChaMP. I. First X-ray source catalog (Kim+, 2004)J/PASJ/58/931 : X-ray sources in A194 and A1060 (Hudaverdi+, 2006)J/A+A/462/449 : Chandra point-source counts in galaxy cluster (Branchesi+,https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/690/295https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/690/295http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/690/295https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/690/295https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/690/295http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/690/295GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/690/295/table3 (Catalog of the 161 X-ray sources detected in the field of the Cl1604 supercluster with a 3{sigma} significance in at least one X-ray band)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/690/295/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/690/295/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/690/295/table3?GETtext/xml+votable180.050000true240.7937543.4409170.005555555555555556Cone search capability for table J/ApJ/690/295/table4 (Catalog of the 112 X-ray sources matched to optical counterparts)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/690/295/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/690/295/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/690/295/table4?GETtext/xml+votable180.050000true240.7937543.4409170.0055555555555555566/9831 9837 9842 9848https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/690/295?format=asciiX-rayOpticaldefaultJ/ApJ/690/295/table3Catalog of the 161 X-ray sources detected in the field of the Cl1604 supercluster with a 3{sigma} significance in at least one X-ray bandrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource name (\dicS{[KLG2009] JHHMMSS.s+DDMMSS} in Simbad)meta.id;meta.maincharprimaryn_Namemeta.ref.urlcharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainePosPositional uncertaintyarcsecstat.error;posfloatSctsAperture corrected net soft (0.5-2keV) countsctphot.count;em.X-rayfloatHctsAperture corrected net hard (2-8keV) countsctphot.count;em.X-rayfloatFctsAperture corrected net full (0.5-8keV) countsctphot.count;em.X-rayfloatSFluxSoft (0.5-2keV) flux in units of erg/s/cm^2^mW.m**-2phot.flux;em.X-raydoubleHFluxHard (2-8keV) flux in units of erg/s/cm^2^mW.m**-2phot.flux;em.X-raydoubleFFluxFull (0.5-8keV) flux in units of erg/s/cm^2^mW.m**-2phot.flux;em.X-raydoubleSSigSoft (0.5-2keV) detection significance (1)stat.fit.goodnessfloatHSigSoft (2-8keV) detection significance (1)stat.fit.goodnessfloatFSigSoft (0.5-8keV) detection significance (1)stat.fit.goodnessfloatHR[-1,1] Hardness ratio (2)phot.flux;arith.ratiofloatFlag[SFH ] Wavdetect band: S(0.5-2keV), H(2-8keV) and F(0.5-8keV)meta.code.errorcharJ/ApJ/690/295/table4Catalog of the 112 X-ray sources matched to optical counterpartsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource name (\dicS{[KLG2009] JHHMMSS.s+DDMMSS} in Simbad) (sometimes several lines for one source)meta.id;meta.maincharRAXX-ray centroid Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEXX-ray centroid Degree of Declination (J2000)pos.eq.dec;meta.mainRAOOptical centroid Hour of Right Ascension (J2000)pos.eq.raDEOOptical centroid Degree of Declination (J2000)pos.eq.decSigmaProbability X-ray source has an optical counterpartstat.fit.goodnessfloatPgenProbability optical source is a genuine counterpartstat.fit.goodnessfloatz? Spectroscopic redshiftsrc.redshiftfloatnullableq_z[-1/4]? Spectroscopic redshift quality flag (1)meta.code.qual;src.redshiftintnullable