1. The SPTpol Extended Cluster Survey
- Author
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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, and Palmese, A
- Subjects
Astronomical Sciences ,Physical Sciences ,astro-ph.CO ,Astronomical and Space Sciences ,Atomic ,Molecular ,Nuclear ,Particle and Plasma Physics ,Physical Chemistry (incl. Structural) ,Astronomy & Astrophysics ,Astronomical sciences - 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.
- Published
- 2020