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Irwin, K. Megerian, L. M. Fissel, L. Moncelsi, M. Amiri, M. C. Runyan, M. Farhang, M. F. Hasselfield, M. Halpern, N. N. Gandilo, O. Dor\\'e, P. A. R. Ade, P. V. Mason, R. O'Brient, R. S. Tucker, S. A. Bryan, S. Golwala, S. J. Benton, T. A. Morford, V. V. Hristov, W. A. Holmes, W. C. Jones, Z. D. Kermish","submitted_at":"2014-07-09T16:04:50Z","abstract_excerpt":"We present the results of integration and characterization of the SPIDER instrument after the 2013 pre-flight campaign. SPIDER is a balloon-borne polarimeter designed to probe the primordial gravitational wave signal in the degree-scale $B$-mode polarization of the cosmic microwave background. With six independent telescopes housing over 2000 detectors in the 94 GHz and 150 GHz frequency bands, SPIDER will map 7.5% of the sky with a depth of 11 to 14 $\\mu$K$\\cdot$arcmin at each frequency, which is a factor of $\\sim$5 improvement over Planck. 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