The Redmapper Galaxy cluster catalog from DES Science verification data

Rykoff, E. S. and Rozo, E. and Hollowood, D. and Bermeo-Hernandez, A. and Jeltema, T. and Mayers, J. and Romer, A. K. and Rooney, P. and Saro, A. and Cervantes, C. Vergara and Wechsler, R. H. and Wilcox, H. and Abbott, T. M. C. and Abdalla, F. B. and Allam, S. and Annis, J. and Benoit-Levy, A. and Bernstein, G. M. and Bertin, E. and Brooks, D. and Burke, D. L. and Capozzi, D. and Carnero Rosell, A. and Kind, M. Carrasco and Castander, F. J. and Childress, M. and Collins, C. A. and Cunha, C. E. and D'Andrea, C. B. and da Costa, L. N. and Davis, T. M. and Desai, S. and Diehl, H. T. and Dietrich, J. P. and Doel, P. and Evrard, A. E. and Finley, D. A. and Flaugher, B. and Fosalba, P. and Frieman, J. and Glazebrook, K. and Goldstein, D. A. and Gruen, D. and Gruendl, R. A. and Gutierrez, G. and Hilton, M. and Honscheid, K. and Hoyle, B. and James, D. J. and Stott, J. P. (2016) The Redmapper Galaxy cluster catalog from DES Science verification data. The Astrophysical Journal Supplement Series, 224 (1): 1. ISSN 0067-0049

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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 > 20 (roughly equivalent to M500c greater than or similar to 10(14) h(70)(-1)M(circle dot)) 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 greater than or similar to 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) similar to 0.01 level for z greater than or similar to 0.7, rising to similar to 0.02 at z similar to 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:
Journal Article
Journal or Publication Title:
The Astrophysical Journal Supplement Series
Uncontrolled Keywords:
?? galaxies: clusters: generaldigital sky surveydark energy surveystellar population synthesisrichness-mass relationx-raydata releasecosmological constraintssdss-iiispectroscopic surveyplanck 2013astronomy and astrophysicsspace and planetary science ??
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Deposited On:
07 Feb 2017 10:10
Last Modified:
22 Jul 2024 23:28