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E. Austermann, J. E. Carlstrom, J. E. Ruhl, J. Gallicchio, J. Hubmayr, J. J. McMahon, J. Montgomery, J. P. Nibarger, J. S. Avva, J. W. Henning, K. D. Irwin, K. K. Schaffer, L. E. Bleem, L. Knox, L. M. Mocanu, M. A. Dobbs, M. Millea, N. Goeckner-Wald, N. Gupta, N. Huang, N. W. Halverson, N. Whitehorn, P. A. R. Ade, P. Chaubal, R. Citron, S. Guns, S. Padin, S. Patil, S. S. Meyer, T. de Haan, T-L. Chou, T. M. Crawford, T. Natoli, T. Veach, V. Novosad, V. Yefremenko, W. Everett, W. L. Holzapfel, W. L. K. Wu, Y. Omori","submitted_at":"2020-12-03T05:24:17Z","abstract_excerpt":"We perform the first simultaneous Bayesian parameter inference and optimal reconstruction of the gravitational lensing of the cosmic microwave background (CMB), using 100 deg$^2$ of polarization observations from the SPTpol receiver on the South Pole Telescope. 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