J/MNRAS/413/1145ivo://CDS.VizieR/J/MNRAS/413/1145doi:10.26093/cds/vizier.74131145CDSBellagamba F.Maturi M.Hamana T.Meneghetti M.Miyazaki S.,Moscardini L.2024-07-13T20:15:08Z2012-01-02T13:29:50ZCDS support team

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

cds-question@unistra.frgalaxy-clustersredshiftedGalaxy clusters are usually detected in blind optical surveys via suitable filtering methods. We present an optimal matched filter which maximizes their signal-to-noise ratio by taking advantage of the knowledge we have of their intrinsic physical properties and of the data noise properties. In this paper we restrict our application to galaxy magnitudes, positions and photometric redshifts if available, and we also apply the filter separately to weak lensing data. The method is suitable to be naturally extended to a multi-band approach which could include not only additional optical bands but also observables with different nature such as X-rays. For each detection, the filter provides its significance, an estimate for the richness and for the redshift even if photo-z are not given. The provided analytical error estimate is tested against numerical simulations. We finally apply our method to the COSMOS field and compare the results with previous cluster detections obtained with different methods. Our catalogue contains 27 galaxy clusters with minimal threshold at 3{sigma} level including both optical and weak-lensing information.2011MNRAS.413.1145Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/413/1145CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/172/182 : XMM Clusters of galaxies in COSMOS field (Finoguenov+ 2007)J/A+A/461/81 : Galaxy clusters in the CFHTLS (Olsen+, 2007)J/ApJ/669/714 : Subaru weak-lensing survey. I. (Miyazaki+, 2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/413/1145https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/413/1145http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/413/1145https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/413/1145https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/413/1145http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/413/1145GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/413/1145/tables (Catalogue of the clusters detected with both optical and lensing filters or with the optical filter without lensing counterpart)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/413/1145/tables?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/413/1145/tables?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/413/1145/tables?GETtext/xml+votable180.050000true150.3952.4460.0055555555555555565/6814 6/27245 27247https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/413/1145?format=asciiOpticaldefaultJ/MNRAS/413/1145/tablesCatalogue of the clusters detected with both optical and lensing filters or with the optical filter without lensing counterpartRichCluster richnesssrc.class.richnessfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSSimbad column added by the CDSmeta.codecharSeqSequential number, <[BMH2011] NNN> in Simbadmeta.recordintzCluster redshiftsrc.redshiftfloatRAJ2000Right ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainS/NSignal-to-noise ratiostat.snrfloatRef[XSOL ] Previous detections (1)meta.bibchar