J/MNRAS/474/3324ivo://CDS.VizieR/J/MNRAS/474/3324doi:10.26093/cds/vizier.74743324CDSKlein M.Mohr J.J.Desai S.Israel H.Allam S.Benoit-levy A.,Brooks D.Buckley-Geer E.Carnero Rosell A.Carrasco Kind M.,Cunha C.E.da Costa L.N.Dietrich J.P.Eifler T.F.Evrard A.E.,Frieman J.Gruen D.Gruendl R.A.Gutierrez G.Honscheid K.James D.J.,Kuehn K.Lima M.Maia M.A.G.March M.Melchior P.Menanteau F.,Miquel R.Plazas A.A.Reil K.Romer A.K.Sanchez E.Santiago B.,Scarpine V.Schubnell M.Sevilla-Noarbe I.Smith M.Soares-Santos M.,Sobreira F.Suchyta E.Swanson M.E.C.Tarle G.(the Des Collaboration)2024-08-18T20:17:18Z2021-04-15T08:19:09ZCDS support team

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

cds-question@unistra.frgalaxy-clustersgalaxiesx-ray-sourcesredshiftedWe describe a multicomponent matched filter (MCMF) cluster confirmation tool designed for the study of large X-ray source catalogues produced by the upcoming X-ray all-sky survey mission eROSITA. We apply the method to confirm a sample of 88 clusters with redshifts 0.05<z<0.8 in the recently published 2RXS catalogue from the ROSAT All-Sky Survey (RASS) over the 208 deg^2^ region overlapped by the Dark Energy Survey (DES) Science Verification (DES-SV) data set. In our pilot study, we examine all X-ray sources, regardless of their extent. Our method employs a multicolour red sequence (RS) algorithm that incorporates the X-ray count rate and peak position in determining the region of interest for follow-up and extracts the positionally and colour-weighted optical richness {lambda}_MCMF_ as a function of redshift for each source. Peaks in the {lambda}_MCMF_-redshift distribution are identified and used to extract photometric redshifts, richness and uncertainties. The significances of all optical counterparts are characterized using the distribution of richnesses defined along random lines of sight. These significances are used to extract cluster catalogues and to estimate the contamination by random superpositions of unassociated optical systems. The delivered photometric redshift accuracy is {delta}z/(1+z)=0.010. We find a well-defined X-ray luminosity-{lambda}_MCMF_ relation with an intrinsic scatter of {delta}ln({lambda}_MCMF_|Lx)=0.21. Matching our catalogue with the DES-SV redMaPPer catalogue yields good agreement in redshift and richness estimates; comparing our catalogue with the South Pole Telescope (SPT) selected clusters shows no inconsistencies. SPT clusters in our data set are consistent with the high-mass extension of the RASS-based {lambda}_MCMF_-mass relation.2018MNRAS.474.3324Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/474/3324CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/588/A103 : Second ROSAT all-sky survey (2RXS) source cataloghttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/474/3324https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/474/3324http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/474/3324https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/474/3324https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/474/3324http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/474/3324GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/474/3324/table1 (*List of all 2RXS clusters with at least one peak in redshift exceeding P{lambda} and Ps>0.98 and P*<0.1.)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/474/3324/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/474/3324/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/474/3324/table1?GETtext/xml+votable180.050000true64.623-58.8490.0055555555555555566/33139 33142 33223 33235 33238 33240 33244 33246 33793 33795-33796 33798-33799 33804 33806 33808 33810 33816-33817 33821 33825-33828 33841 33844 33847 33849 33852 33889-33890 33894 33923 33928-33929 33935 33942 33945 33953 33956 33968 33970 33989-33990 33992-33993 33996 34001 34008 34010 34015 34017 34020-34021 34023 34031-34032 34035 34038 34040 34186 38920https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/474/3324?format=asciiX-raydefaultJ/MNRAS/474/3324/table1*List of all 2RXS clusters with at least one peak in redshift exceeding P{lambda} and Ps>0.98 and P*<0.1.Ps1Fraction of sources in the random catalogue with |z_RASS_-z_rand_|<0.075 that have a signal-to-noise ratio S equal to or below that found for the RASS cluster candidate for first peak, P_s1_meta.numberfloatPs2Fraction of sources in the random catalogue with |z_RASS_-z_rand_|<0.075 that have a signal-to-noise ratio S equal to or below that found for the RASS cluster candidate for first peak, P_s2_meta.numberfloatP*Probability of a source being an X-ray-emitting UCAC4 sourcestat.fit.goodnessfloatz2? Photometric redshift of second peaksrc.redshiftfloatnullablee_z1rms uncertainty on z1, {sigma}_z,1_stat.errorfloate_z2? rms uncertainty on z2, {sigma}_z,2_stat.errorfloatnullablelMCMF1Richness for first peak, {lambda}_MCMF1_src.class.richnessfloatlMCMF2? Richness for second peak, {lambda}_MCMF2_src.class.richnessfloatnullablee_lMCMF1rms uncertainty on lMCMF1, {sigma}_{lambda}1_stat.errorfloate_lMCMF2? rms uncertainty on lMCMF2, {sigma}_{lambda}2_stat.errorfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName (2RXC JHHMM.m+DDMM)meta.id;meta.maincharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainPl1Probability of obtaining a particular richness {lambda}_MCMF_ as a function of redshift for our sample for first peak, P_{lambda}1_stat.fit.goodnessfloatPl2Probability of obtaining a particular richness {lambda}_MCMF_ as a function of redshift for our sample for second peak, P_{lambda}2_stat.fit.goodnessfloatz1Photometric redshift of first peaksrc.redshiftfloat