MEASUREMENTS OF SUB-DEGREE B-MODE POLARIZATION IN THE COSMIC MICROWAVE BACKGROUND FROM 100 SQUARE DEGREES OF SPTPOL DATA

R. Keisler, S. Hoover, N. Harrington, J. W. Henning, P. A R Ade, K. A. Aird, J. E. Austermann, J. A. Beall, A. N. Bender, B. A. Benson, L. E. Bleem, J. E. Carlstrom, C. L. Chang, H. C. Chiang, H. M. Cho, R. Citron, T. M. Crawford, A. T. Crites, T. De Haan, M. A. DobbsW. Everett, J. Gallicchio, J. Gao, E. M. George, A. Gilbert, N. W. Halverson, D. Hanson, G. C. Hilton, G. P. Holder, W. L. Holzapfel, Z. Hou, J. D. Hrubes, N. Huang, J. Hubmayr, K. D. Irwin, L. Knox, A. T. Lee, E. M. Leitch, D. Li, D. Luong-Van, Daniel P Marrone, J. J. McMahon, J. Mehl, S. S. Meyer, L. Mocanu, T. Natoli, J. P. Nibarger, V. Novosad, S. Padin, C. Pryke, C. L. Reichardt, J. E. Ruhl, B. R. Saliwanchik, J. T. Sayre, K. K. Schaffer, E. Shirokoff, G. Smecher, A. A. Stark, K. T. Story, C. Tucker, K. Vanderlinde, J. D. Vieira, G. Wang, N. Whitehorn, V. Yefremenko, O. Zahn

Research output: Contribution to journalArticle

93 Scopus citations

Abstract

We present a measurement of the B-mode polarization power spectrum (the BB spectrum) from 100 deg2 of sky observed with SPTpol, a polarization-sensitive receiver currently installed on the South Pole Telescope. The observations used in this work were taken during 2012 and early 2013 and include data in spectral bands centered at 95 and 150 GHz. We report the BB spectrum in five bins in multipole space, spanning the range 300 ≤ l ≤ 2300, and for three spectral combinations: 95 GHz × 95 GHz, 95 GHz × 150 GHz, and 150 GHz × 150 GHz. We subtract small (lens, that multiplies the predicted lensed B-mode spectrum, and marginalizing over tensor power and foregrounds, we find Alens = 1.0.8 ± 0.26, indicating that our measured spectra are consistent with the signal expected from gravitational lensing. The data presented here provide the best measurement to date of the B-mode power spectrum on these angular scales.

Original languageEnglish (US)
Article number151
JournalAstrophysical Journal
Volume807
Issue number2
DOIs
StatePublished - Jul 10 2015

Keywords

  • cosmic background radiation
  • cosmology: observations

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

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    Keisler, R., Hoover, S., Harrington, N., Henning, J. W., Ade, P. A. R., Aird, K. A., Austermann, J. E., Beall, J. A., Bender, A. N., Benson, B. A., Bleem, L. E., Carlstrom, J. E., Chang, C. L., Chiang, H. C., Cho, H. M., Citron, R., Crawford, T. M., Crites, A. T., De Haan, T., ... Zahn, O. (2015). MEASUREMENTS OF SUB-DEGREE B-MODE POLARIZATION IN THE COSMIC MICROWAVE BACKGROUND FROM 100 SQUARE DEGREES OF SPTPOL DATA. Astrophysical Journal, 807(2), [151]. https://doi.org/10.1088/0004-637X/807/2/151