{"paper":{"title":"Optical Redshift and Richness Estimates for Galaxy Clusters Selected with the Sunyaev-Zel'dovich Effect from 2008 South Pole Telescope Observations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. A. Stark, A. Loehr, A. Rest, A. T. Crites, A. T. Lee, A. Zenteno, B. A. Benson, B. Stalder, C.-C. Ngeow, C. L. Chang, C. L. Reichardt, C. Pryke, C. W. Stubbs, D. L. Tucker, D. Marrone, E. Bertin, E. J. Buckley-Geer, E. M. George, E. M. Leitch, E. Shirokoff, F. W. High, G. P. Holder, H. G. Spieler, H. Lin, J. D. Hrubes, J. D. Vieira, J. E. Carlstrom, J. E. Ruhl, J. J. McMahon, J. J. Mohr, J. Mehl, J. P. Dudley, J. Ruel, J. Song, K. A. Aird, K. K. Schaffer, K. Vanderlinde, L. E. Bleem, L. Shaw, M. A. Dobbs, M. Brodwin, M. Gladders, M. Hamuy, M. Joy, M. Lueker, N. Morell, N. W. Halverson, O. Zahn, P. A. R. Ade, P. Challis, R. Armstrong, R. C. Smith, R. J. Foley, R. Keisler, R. Williamson, S. Bhattacharya, S. Desai, S. M. Hansen, S. Padin, S. S. Allam, S. S. Meyer, T. de Haan, T. E. Montroy, T. M. Crawford, T. Plagge, W. A. Barkhouse, W. L. Holzapfel, W. M. Wood-Vasey, Y.-T. Lin, Y. Yang, Z. Staniszewski","submitted_at":"2010-03-01T20:19:00Z","abstract_excerpt":"We present redshifts and optical richness properties of 21 galaxy clusters uniformly selected by their Sunyaev-Zel'dovich signature. These clusters, plus an additional, unconfirmed candidate, were detected in a 178 square-degree area surveyed by the South Pole Telescope in 2008. Using griz imaging from the Blanco Cosmology Survey and from pointed Magellan telescope observations, as well as spectroscopy using Magellan facilities, we confirm the existence of clustered red-sequence galaxies, report red-sequence photometric redshifts, present spectroscopic redshifts for a subsample, and derive R_2"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1003.0005","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}