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Title: A measurement of the cosmic microwave background gravitational lensing potential from 100 square degrees of SPTpol data

Here, we present a measurement of the cosmic microwave background (CMB) gravitational lensing potential using data from the first two seasons of observations with SPTpol, the polarization-sensitive receiver currently installed on the South Pole Telescope. The observations used in this work cover 100 deg2 of sky with arcminute resolution at 150 GHz. Using a quadratic estimator, we make maps of the CMB lensing potential from combinations of CMB temperature and polarization maps. We combine these lensing potential maps to form a minimum-variance (MV) map. The lensing potential is measured with a signal-to-noise ratio of greater than one for angular multipoles between $$100\lt L\lt 250$$. This is the highest signal-to-noise mass map made from the CMB to date and will be powerful in cross-correlation with other tracers of large-scale structure. We calculate the power spectrum of the lensing potential for each estimator, and we report the value of the MV power spectrum between $$100\lt L\lt 2000$$ as our primary result. We constrain the ratio of the spectrum to a fiducial ΛCDM model to be AMV = 0.92 ± 0.14 (Stat.) ± 0.08 (Sys.). Restricting ourselves to polarized data only, we find APOL = 0.92 ± 0.24 (Stat.) ± 0.11 (Sys.). This measurement rejects the hypothesis of no lensing at $$5.9\sigma $$ using polarization data alone, and at $$14\sigma $$ using both temperature and polarization data.
Authors:
 [1] ;  [2] ;  [3] ;  [1] ;  [4] ;  [5] ;  [6] ;  [7] ;  [8] ;  [8] ;  [8] ;  [9] ;  [10] ;  [1] ;  [1] ;  [8] ;  [11] ;  [12] ;  [4] ;  [1] more »;  [5] ;  [11] ;  [2] ;  [4] ;  [11] ;  [13] ;  [5] ;  [2] ;  [11] ;  [1] ;  [1] ;  [1] ;  [11] ;  [5] ;  [14] ;  [15] ;  [16] ;  [17] ;  [1] ;  [18] ;  [1] ;  [1] ;  [19] ;  [8] ;  [1] ;  [1] ;  [20] ;  [1] ;  [5] ;  [21] ;  [22] ;  [23] ;  [24] ;  [20] ;  [20] ;  [20] ;  [25] ;  [26] ;  [27] ;  [3] ;  [28] ;  [29] ;  [21] ;  [11] ;  [21] ;  [17] « less
  1. Univ. of Chicago, Chicago, IL (United States)
  2. McGill Univ., Montreal, QC (Canada)
  3. Cardiff Univ., Cardiff (United Kingdom)
  4. Univ. of Colorado, Boulder, CO (United States)
  5. NIST Quantum Devices Group, Boulder, CO (United States)
  6. McGill Univ., Montreal, QC (Canada); Argonne National Lab. (ANL), Argonne, IL (United States)
  7. Univ. of Chicago, Chicago, IL (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  8. Univ. of Chicago, Chicago, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
  9. Univ. of KwaZulu-Natal, Durban (South Africa)
  10. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  11. Univ. of California, Berkeley, CA (United States)
  12. McGill Univ., Montreal, QC (Canada); Canadian Institute for Advanced Research, Toronto, ON (Canada)
  13. Univ. of Chicago, Chicago, IL (United States); Univ. of Colorado, Boulder, CO (United States)
  14. SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., Stanford, CA (United States)
  15. Stanford Univ., Stanford, CA (United States)
  16. Univ. of California, Davis, CA (United States)
  17. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  18. NIST Quantum Devices Group, Boulder, CO (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  19. Univ. of Michigan, Ann Arbor, MI (United States)
  20. Case Western Reserve Univ., Cleveland, OH (United States)
  21. Argonne National Lab. (ANL), Argonne, IL (United States)
  22. Univ. of Chicago, Chicago, IL (United States); California Inst. of Technology (CalTech), Pasadena, CA (United States)
  23. Univ. of Minnesota, Minneapolis, MN (United States)
  24. Univ. of California, Berkeley, CA (United States); Univ. of Melbourne (Australia)
  25. Univ. of Chicago, Chicago, IL (United States); School of the Art Institute of Chicago, Chicago, IL (United States)
  26. McGill Univ., Montreal, QC (Canada); Three-Speed Logic, Inc., Vancouver, BC (Canada)
  27. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States)
  28. Univ. of Toronto, Toronto, ON (Canada)
  29. Univ. of Illinois at Urbana-Champaign, Urbana, IL (United States)
Publication Date:
OSTI Identifier:
1326855
Report Number(s):
SLAC-PUB--16712
Journal ID: ISSN 1538-4357
Grant/Contract Number:
AC02-76SF00515
Type:
Accepted Manuscript
Journal Name:
The Astrophysical Journal (Online)
Additional Journal Information:
Journal Name: The Astrophysical Journal (Online); Journal Volume: 810; Journal Issue: 1; Journal ID: ISSN 1538-4357
Publisher:
Institute of Physics (IOP)
Research Org:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS cosmic background radiation; cosmology: observations; large-scale structure of universe