학술논문
The SPTpol Extended Cluster Survey
Document Type
article
Author
Bleem, LE; Bocquet, S; Stalder, B; Gladders, MD; Ade, PAR; Allen, SW; Anderson, AJ; Annis, J; Ashby, MLN; Austermann, JE; Avila, S; Avva, JS; Bayliss, M; Beall, JA; Bechtol, K; Bender, AN; Benson, BA; Bertin, E; Bianchini, F; Blake, C; Brodwin, M; Brooks, D; Buckley-Geer, E; Burke, DL; Carlstrom, JE; Rosell, A Carnero; Kind, M Carrasco; Carretero, J; Chang, CL; Chiang, HC; Citron, R; Moran, C Corbett; Costanzi, M; Crawford, TM; Crites, AT; da Costa, LN; de Haan, T; De Vicente, J; Desai, S; Diehl, HT; Dietrich, JP; Dobbs, MA; Eifler, TF; Everett, W; Flaugher, B; Floyd, B; Frieman, J; Gallicchio, J; García-Bellido, J; George, EM; Gerdes, DW; Gilbert, A; Gruen, D; Gruendl, RA; Gschwend, J; Gupta, N; Gutierrez, G; Halverson, NW; Harrington, N; Henning, JW; Heymans, C; Holder, GP; Hollowood, DL; Holzapfel, WL; Honscheid, K; Hrubes, JD; Huang, N; Hubmayr, J; Irwin, KD; James, DJ; Jeltema, T; Joudaki, S; Khullar, G; Klein, M; Knox, L; Kuropatkin, N; Lee, AT; Li, D; Lidman, C; Lowitz, A; MacCrann, N; Mahler, G; Maia, MAG; Marshall, JL; McDonald, M; McMahon, JJ; Melchior, P; Menanteau, F; Meyer, SS; Miquel, R; Mocanu, LM; Mohr, JJ; Montgomery, J; Nadolski, A; Natoli, T; Nibarger, JP; Noble, G; Novosad, V; Padin, S; Palmese, A
Source
The Astrophysical Journal Supplement Series. 247(1)
Subject
Language
Abstract
We describe the observations and resultant galaxy cluster catalog from the 2770 deg2 SPTpol Extended Cluster Survey (SPT-ECS). Clusters are identified via the Sunyaev-Zel'dovich (SZ) effect and confirmed with a combination of archival and targeted follow-up data, making particular use of data from the Dark Energy Survey (DES). With incomplete follow-up we have confirmed as clusters 244 of 266 candidates at a detection significance ξ ≥ 5 and an additional 204 systems at 4 < ξ < 5. The confirmed sample has a median mass of M500c ~ 4.4 ´ 1014 M☉ h70 -1 and a median redshift of z = 0.49, and we have identified 44 strong gravitational lenses in the sample thus far. Radio data are used to characterize contamination to the SZ signal; the median contamination for confirmed clusters is predicted to be ∼1% of the SZ signal at the ξ > 4 threshold, and 10% of their measured SZ flux. We associate SZ-selected clusters, from both SPT-ECS and the SPT-SZ survey, with clusters from the DES redMaPPer sample, and we find an offset distribution between the SZ center and central galaxy in general agreement with previous work, though with a larger fraction of clusters with significant offsets. Adopting a fixed Planck-like cosmology, we measure the optical richness-SZ mass (l - M) relation and find it to be 28% shallower than that from a weak-lensing analysis of the DES data-a difference significant at the 4σ level-with the relations intersecting at λ = 60. The SPT-ECS cluster sample will be particularly useful for studying the evolution of massive clusters and, in combination with DES lensing observations and the SPT-SZ cluster sample, will be an important component of future cosmological analyses.