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THE REDMAPPER GALAXY CLUSTER CATALOG FROM DES SCIENCE VERIFICATION DATA

Rykoff, ES and Rozo, E and Hollowood, D and Bermeo-Hernandez, A and Jeltema, T and Mayers, J and Romer, AK and Rooney, P and Saro, A and Cervantes, CV and Wechsler, RH and Wilcox, H and Abbott, TMC and Abdalla, FB and Allam, S and Annis, J and Benoit-Lévy, A and Bernstein, GM and Bertin, E and Brooks, D and Burke, DL and Capozzi, D and Rosell, AC and Kind, MC and Castander, FJ and Childress, M and Collins, CA and Cunha, CE and D'Andrea, CB and Costa, LND and Davis, TM and Desai, S and Diehl, HT and Dietrich, JP and Doel, P and Evrard, AE and Finley, DA and Flaugher, B and Fosalba, P and Frieman, J and Glazebrook, K and Goldstein, DA and Gruen, D and Gruendl, RA and Gutierrez, G and Hilton, M and Honscheid, K and Hoyle, B and James, DJ and Kay, ST and Kuehn, K and Kuropatkin, N and Lahav, O and Lewis, GF and Lidman, C and Lima, M and Maia, MAG and Mann, RG and Marshall, JL and Martini, P and Melchior, P and Miller, CJ and Miquel, R and Mohr, JJ and Nichol, RC and Nord, B and Ogando, R and Plazas, AA and Reil, K (2016) THE REDMAPPER GALAXY CLUSTER CATALOG FROM DES SCIENCE VERIFICATION DATA. Astrophysical Journal, Supplement Series, 224 (1). ISSN 0067-0049

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Abstract

We describe updates to the redMaPPer algorithm, a photometric red-sequence cluster finder specifically designed for large photometric surveys. The updated algorithm is applied to 150 deg2 of Science Verification (SV) data from the Dark Energy Survey (DES), and to the Sloan Digital Sky Survey (SDSS) DR8 photometric data set. The DES SV catalog is locally volume limited and contains 786 clusters with richness l > 20 (roughly equivalent to M500c ≳ 1014 h70-1 M⊙) and 0.2 < z < 0.9. The DR8 catalog consists of 26,311 clusters with 0.08 < z < 0.6, with a sharply increasing richness threshold as a function of redshift for z ≳ 0.35. The photometric redshift performance of both catalogs is shown to be excellent, with photometric redshift uncertainties controlled at the σz (1 + z) ∼ 0.01 level for z ≲ 0.7, rising to ∼0.02 at z ∼ 0.9 in DES SV. We make use of Chandra and XMM X-ray and South Pole Telescope SunyaevZeldovich data to show that the centering performance and mass-richness scatter are consistent with expectations based on prior runs of redMaPPer on SDSS data. We also show how the redMaPPer photo-z and richness estimates are relatively insensitive to imperfect star/galaxy separation and small-scale star masks. © 2016. The American Astronomical Society. All rights reserved.

Item Type: Article
Uncontrolled Keywords: 0201 Astronomical And Space Sciences, 0305 Organic Chemistry, 0306 Physical Chemistry (Incl. Structural)
Subjects: Q Science > QB Astronomy
Divisions: Astrophysics Research Institute
Publisher: American Astronomical Society
Date Deposited: 26 Jul 2016 16:26
Last Modified: 26 Jul 2016 16:26
DOI or Identification number: 10.3847/0067-0049/224/1/1
URI: http://researchonline.ljmu.ac.uk/id/eprint/3947

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