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A Photometric Redshift Galaxy Catalog from the Red-Sequence Cluster Survey
Ist Teil von
The Astrophysical journal. Supplement series, 2005-06, Vol.158 (2), p.161-177
Ort / Verlag
IOP Publishing
Erscheinungsjahr
2005
Quelle
EZB Electronic Journals Library
Beschreibungen/Notizen
The Red-Sequence Cluster Survey (RCS) provides a large and deep photometric catalog of galaxies in the z' and R sub(c) bands for 90 deg super(2) of sky, and supplemental V and B data have been obtained for 33.6 deg super(2). We compile a photometric redshift catalog from these four-band data by utilizing the empirical quadratic polynomial photometric redshift fitting technique in combination with CNOC2 and GOODS/HDF-N redshift data. The training set includes 4924 spectral redshifts. The resulting catalog contains more than one million galaxies with photometric redshifts <1.5 and R sub(c) < 24, giving an rms scatter sigma ( Delta z) < 0.06 within the redshift range 0.2 < z < 0.5 and sigma ( Delta z) < 0.11 for galaxies at 0.0 < z < 1.5. We describe the empirical quadratic polynomial photometric redshift fitting technique that we use to determine the relation between redshift and photometry. A kd-tree algorithm is used to divide up our sample to improve the accuracy of our catalog. We also present a method for estimating the photometric redshift error for individual galaxies. We show that the redshift distribution of our sample is in excellent agreement with smaller and much deeper photometric and spectroscopic redshift surveys.
Sprache
Englisch
Identifikatoren
ISSN: 0067-0049
eISSN: 1538-4365
DOI: 10.1086/429293
Titel-ID: cdi_crossref_primary_10_1086_429293
Format
–
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