{"paper":{"title":"BICEP2/Keck Array IV: Optical Characterization and Performance of the BICEP2 and Keck Array Experiments","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.IM","authors_text":"A. C. Weber, A. D. Turner, A. G. Vieregg, A. Orlando, B. G. Keating, C. A. Bischoff, C. B. Netterfield, C. D. Dowell, C. D. Sheehy, C. L. Kuo, C. L. Wong, C. Pryke, D. Barkats, E. Bullock, E. M. Leitch, G. C. Hilton, G. P. Teply, H. Hui, H. T. Nguyen, I. Buder, J. A. Brevik, J. E. Tolan, J. H. Kang, J. J. Bock, J. M. Kovac, J. P. Filippini, J. P. Kaufman, K. D. Irwin, Keck Array Collaborations: P. A. R. Ade, K. G. Megerian, K. J. Bradford, K. S. Karkare, K. Thompson, K. W. Yoon, L. Duband, M. Halpern, M. Hasselfield, M. Lueker, R. O'Brient, R. Schwarz, R. V. Sudiwala, R. W. Aikin, R. W. Ogburn IV, S. A. Kernasovskiy, S. Fliescher, S. J. Benton, S. Kefeli, S. R. Golwala, S. R. Hildebrandt, S. Richter, The BICEP2, Z. K. Staniszewski","submitted_at":"2015-02-02T19:58:59Z","abstract_excerpt":"BICEP2 and the Keck Array are polarization-sensitive microwave telescopes that observe the cosmic microwave background (CMB) from the South Pole at degree angular scales in search of a signature of inflation imprinted as B-mode polarization in the CMB. BICEP2 was deployed in late 2009, observed for three years until the end of 2012 at 150 GHz with 512 antenna-coupled transition edge sensor bolometers, and has reported a detection of B-mode polarization on degree angular scales. The Keck Array was first deployed in late 2010 and will observe through 2016 with five receivers at several frequenci"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.00596","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}