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Hrubes, J. D. Vieira, J. E. Austermann, J. E. Carlstrom, J. E. Ruhl, J. Gallicchio, J. Hubmayr, J. J. McMahon, J. Montgomery, J. P. Nibarger, J. S. Avva, J.T. Sayre, J. W. Henning, K. D. Irwin, K. K. Schaffer, K. Vanderlinde, L. E. Bleem, L. Knox, L. M. Mocanu, M. A. Dobbs, N. Gupta, N. Harrington, N. Huang, N. W. Halverson, N. Whitehorn, P. A. R. Ade, R. Citron, S. Padin, S. Patil, S. S. Meyer, T. de Haan, T. M. Crawford, T. Natoli, T. Veach, V. Novosad, V. Yefremenko, W. Everett, W. L. Holzapfel, W. L. K. Wu","submitted_at":"2019-10-13T13:26:52Z","abstract_excerpt":"We report a B-mode power spectrum measurement from the cosmic microwave background (CMB) polarization anisotropy observations made using the SPTpol instrument on the South Pole Telescope. This work uses 500 deg$^2$ of SPTpol data, a five-fold increase over the last SPTpol B-mode release. 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