{"paper":{"title":"Self-Calibration of BICEP1 Three-Year Data and Constraints on Astrophysical Polarization Rotation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.IM","authors_text":"B.G. Keating, C. Bischoff, C.D. Dowell, C.L. Kuo, C. Pryke, C. Sheehy, D. Barkats, E.F. Hivon, E.M. Bierman, E.M. Leitch, G. Rocha, H.C. Chiang, H.T. Nguyen, I. Buder, J.E. Tolan, J. Filippini, J. J. Bock, J.M. Kovac, J.O. Battle, J.P. Kaufman, K.W. Yoon, L. Duband, M. Shimon, M. Su, N.J. Miller, N. Ponthieu, P.A.R. Ade, P.V. Mason, R. Aikin, S. Richter, S.S. Kernasovskiy, T. Matsumura, V.V. Hristov, W.C. Jones, W.L. Holzapfel, Y.D. Takahashi","submitted_at":"2013-12-30T20:59:20Z","abstract_excerpt":"Cosmic Microwave Background (CMB) polarimeters aspire to measure the faint $B$-mode signature predicted to arise from inflationary gravitational waves. They also have the potential to constrain cosmic birefringence which would produce non-zero expectation values for the CMB's $TB$ and $EB$ spectra. However, instrumental systematic effects can also cause these $TB$ and $EB$ correlations to be non-zero. In particular, an overall miscalibration of the polarization orientation of the detectors produces $TB$ and $EB$ spectra which are degenerate with isotropic cosmological birefringence, while also"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.7877","kind":"arxiv","version":1},"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"}