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n10:methodsdataanalysis n12:cosmologyincludingclustersofgalaxies n10:galaxiesdistancesandredshifts n10:galaxiesclustersgeneral
dcterms:title
Photometric validation of a model independent procedure to extract galaxy clusters
dcterms:date
2001-01-01
rdaw:P10072
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dcterms:abstract
By means of CCD photometry in three bands (Gunn g, r, i) we investigate the existence of 12 candidate clusters extracted via a model independent peak finding algorithm ([CITE]) from DPOSS data. The derived color-magnitude diagrams allow us to confirm the physical nature of 9 of the cluster candidates, and to estimate their photometric redshifts. Of the other candidates, one is a fortuitous detection of a true cluster at $z \sim 0.4$, one is a false detection and the last is undecidable on the basis of the available data. The accuracy of the photometric redshifts is tested on an additional sample of 8 clusters with known spectroscopic redshifts. Photometric redshifts turn out to be accurate within $z \sim 0.01$ (interquartile range).
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aa1478
dcterms:dateCopyrighted
2001-01-01
dcterms:rights
© ESO, 2001
dcterms:rightsHolder
ESO
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