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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. Andersson, K. K. Schaffer, K. Vanderlinde, L. E. Bleem, L. Knox, L. Shaw, M. A. Dobbs, M. Bautz, M. Brodwin, M. D. Gladders, M. Joy, M. L. N. Ashby, M. Lueker, N. W. Halverson, O. Zahn, P. A. R. Ade, R. J. Foley, R. Keisler, R. Williamson, S. A. Stanford, S. Desai, S. Padin, S. S. Meyer, S. S. Murray, T. de Haan, T. E. Montroy, T. M. Crawford, T. Plagge, W. L. Holzapfel, W. R. Forman, Y. Yang, Z. Staniszewski","submitted_at":"2010-06-29T14:47:41Z","abstract_excerpt":"We report the spectroscopic confirmation of SPT-CL J0546-5345 at <z> = 1.067. To date this is the most distant cluster to be spectroscopically confirmed from the 2008 South Pole Telescope (SPT) catalog, and indeed the first z > 1 cluster discovered by the Sunyaev-Zel'dovich Effect (SZE). We identify 21 secure spectroscopic members within 0.9 Mpc of the SPT cluster position, 18 of which are quiescent, early-type galaxies. 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