The redmapper galaxy cluster catalog from DES Science Verification data

Rykoff, E S, Rozo, E, Hollowood, D, Bermeo-Hernandez, A, Jeltema, T, Mayers, Julian, Romer, Kathy, Rooney, Philip, Saro, A, Vergara Cervantes, C, Wechsler, R H, Wilcox, H, Abbott, T M C, Abdalla, F B, Allam, S, Annis, J, Benoit-Lévy, A, Bernstein, G M, Bertin, E, Brooks, D, Burke, D L, Capozzi, D, Carnero Rosell, A, Carrasco Kind, M, Castander, F J, Childress, M, Collins, C A, Cunha, C E, D’Andrea, C B, da Costa, L N, Davis, T M, Desai, S, Diehl, H T, Dietrich, J P, Doel, P, Evrard, A E, Finley, D A, Flaugher, B, Fosalba, P, Frieman, J, Glazebrook, K, Goldstein, D A, Gruen, D, Gruendl, R A, Gutierrez, G, Hilton, M, Honscheid, K, Hoyle, B, James, D J, Kay, S T, Kuehn, K, Kuropatkin, N, Lahav, O, Lewis, G F, Lidman, C, Lima, M, Maia, M A G, Mann, R G, Marshall, J L, Martini, P, Melchior, P, Miller, C J, Miquel, R, Mohr, J J, Nichol, R C, Nord, B, Ogando, R, Plazas, A A, Reil, K, Sahlén, M, Sanchez Garcia, E, Santiago, B, Scarpine, V, Schubnell, M, Sevilla-Noarbe, I, Smith, R C, Soares-Santos, M, Sobreira, F, Stott, J P, Suchyta, E, Swanson, M E C, Tarle, G, Thomas, D, Tucker, D, Uddin, S, Viana, P T P, Vikram, V, Walker, A R and Zhang, Y (2016) The redmapper galaxy cluster catalog from DES Science Verification data. The Astrophysical Journal Supplement Series, 224 (1). p. 1. ISSN 1538-4365

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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 {{deg}}2 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 lambda \gt 20 (roughly equivalent to {M}{{500c}}≳ {10}14 {h}70-1 {M}o ) and 0.2\lt z\lt 0.9. The DR8 catalog consists of 26,311 clusters with 0.08\lt z\lt 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 {sigma }z/(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 Sunyaev--Zeldovich 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.

Item Type: Article
Keywords: Galaxies: clusters: general
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science > QB Astronomy
Depositing User: Richard Chambers
Date Deposited: 23 Jun 2016 15:02
Last Modified: 24 Mar 2017 11:34
URI: http://sro.sussex.ac.uk/id/eprint/61697

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Project NameSussex Project NumberFunderFunder Ref
Astrophysics and Cosmology - Sussex Consolidated GrantG1291STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCILST/L000652/1
2012 Doctoral Training Grant - Quota Studentships (STFC)G0939STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCILST/K502364/1