The SPTpol Extended Cluster Survey
Creators: name: Bleem, L. E.
name: Bocquet, S.
name: Stalder, B.
name: Gladders, M. D.
name: Ade, P. A. R.
name: Allen, S. W.
name: Anderson, A. J.
name: Annis, J.
name: Ashby, M. L. N.
name: Austermann, J. E.
name: Avila, S.
name: Avva, J. S.
name: Bayliss, M.
name: Beall, J. A.
name: Bechtol, K.
name: Bender, A. N.
name: Benson, B. A.
name: Bertin, E.
name: Bianchini, F.
name: Blake, C.
name: Brodwin, M.
name: Brooks, D.
name: Buckley-Geer, E.
name: Burke, D. L.
name: Carlstrom, J. E.
name: Rosell, A. Carnero
name: Kind, M. Carrasco
name: Carretero, J.
name: Chang, C. L.
name: Chiang, H. C.
name: Citron, R.
name: Moran, C. Corbett
name: Costanzi, M.
name: Crawford, T. M.
name: Crites, A. T.
name: da Costa, L. N.
name: de Haan, T.
name: De Vicente, J.
name: Desai, S.
name: Diehl, H. T.
name: Dietrich, J. P.
name: Dobbs, M. A.
name: Eifler, T. F.
name: Everett, W.
name: Flaugher, B.
name: Floyd, B.
name: Frieman, J.
name: Gallicchio, J.
name: García-Bellido, J.
name: George, E. M.
name: Gerdes, D. W.
name: Gilbert, A.
name: Gruen, D.
name: Gruendl, R. A.
name: Gschwend, J.
name: Gupta, N.
name: Gutierrez, G.
name: Halverson, N. W.
name: Harrington, N.
name: Henning, J. W.
name: Heymans, C.
name: Holder, G. P.
name: Hollowood, D. L.
name: Holzapfel, W. L.
name: Honscheid, K.
name: Hrubes, J. D.
name: Huang, N.
name: Hubmayr, J.
name: Irwin, K. D.
name: James, D. J.
name: Jeltema, T.
name: Joudaki, S.
name: Khullar, G.
name: Klein, M.
name: Knox, L.
name: Kuropatkin, N.
name: Lee, A. T.
name: Li, D.
name: Lidman, C.
name: Lowitz, A.
name: MacCrann, N.
name: Mahler, G.
name: Maia, M. A. G.
name: Marshall, J. L.
name: McDonald, M.
name: McMahon, J. J.
name: Melchior, P.
name: Menanteau, F.
name: Meyer, S. S.
name: Miquel, R.
name: Mocanu, L. M.
name: Mohr, J. J.
name: Montgomery, J.
name: Nadolski, A.
name: Natoli, T.
name: Nibarger, J. P.
name: Noble, G.
name: Novosad, V.
name: Padin, S.
name: Palmese, A.
name: Parkinson, D.
name: Patil, S.
name: Paz-Chinchón, F.
name: Plazas, A. A.
name: Pryke, C.
name: Ramachandra, N. S.
name: Reichardt, C. L.
name: González, J. D. Remolina
name: Romer, A. K.
name: Roodman, A.
name: Ruhl, J. E.
name: Rykoff, E. S.
name: Saliwanchik, B. R.
name: Sanchez, E.
name: Saro, A.
name: Sayre, J. T.
name: Schaffer, K. K.
name: Schrabback, T.
name: Serrano, S.
name: Sharon, K.
name: Sievers, C.
name: Smecher, G.
name: Smith, M.
name: Soares-Santos, M.
name: Stark, A. A.
name: Story, K. T.
name: Suchyta, E.
name: Tarle, G.
name: Tucker, C.
name: Vanderlinde, K.
name: Veach, T.
name: Vieira, J. D.
name: Wang, G.
name: Weller, J.
name: Whitehorn, N.
name: Wu, W. L. K.
name: Yefremenko, V.
name: Zhang, Y.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We describe the observations and resultant galaxy cluster catalog from the 2770 deg$^2$ 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 followup we have confirmed as clusters 244 of 266 candidates at a detection significance $ξ\ge 5$ and an additional 204 systems at $44$ threshold, and $&lt;4\%$ of clusters have a predicted contamination $&gt;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 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-to-SZ-mass ($λ-M$) relation and find it to be 28% shallower than that from a weak-lensing analysis of the DES data---a difference significant at the 4 $σ$ 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.
description: 49 pages, 14 figures, 10 tables. Minor changes to match accepted version in ApJS