{"paper":{"title":"Detection of Gamma-Ray Polarization in Prompt Emission of GRB 100826A","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"astro-ph.HE","authors_text":"Daisuke Yonetoku, Hirofumi Fujimoto, IKAROS Demonstration Team, Kenji Toma, Noriyuki Toukairin, Shin Kubo, Shuichi Gunji, Takuya Takahashi, Tatehiro Mihara, Tomonori Sakashita, Toshio Murakami, Yoshiki Kodama, Yoshiyuki Morihara","submitted_at":"2011-11-08T01:45:44Z","abstract_excerpt":"We report the polarization measurement in prompt $\\gamma$-ray emission of GRB 100826A with the Gamma-Ray Burst Polarimeter (GAP) aboard the small solar power sail demonstrator IKAROS. We detected the firm change of polarization angle (PA) during the prompt emission with 99.9% ($3.5 \\sigma$) confidence level, and the average polarization degree ($\\Pi$) of $27 \\pm 11$% with 99.4% ($2.9 \\sigma$) confidence level. Here the quoted errors are given at 1 $\\sigma$ confidence level for two parameters of interest. The systematic errors have been carefully included in this analysis, unlike any previous r"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1111.1779","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"}