{"paper":{"title":"GRB 091024A and the nature of ultra-long gamma-ray bursts","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. Cucchiara, A.C. Updike, A. Gomboc, A. Henden, A. Levan, A. Melandri, A.V. Filippenko, C.G. Mundell, C. Guidorzi, C.J. Mottram, D. Bersier, D.B. Fox, D.H. Hartmann, D. Kopac, D. Svinkin, E. Berger, F.J. Virgili, G. Williams, I.A. Steele, J. Japelj, N.R. Clay, N.R. Tanvir, P.A. Milne, P.T. O'Brien, R. Chornock, R. Harrison, R. Margutti, S.B. Cenko, S. Golenetskii, S. Kobayashi, V. Pal'shin, W. Li, Z. Cano","submitted_at":"2013-10-01T14:16:24Z","abstract_excerpt":"We present a broadband study of gamma-ray burst (GRB) 091024A within the context of other ultra-long-duration GRBs. An unusually long burst detected by Konus-Wind, Swift, and Fermi, GRB 091024A has prompt emission episodes covering ~1300 s, accompanied by bright and highly structured optical emission captured by various rapid-response facilities, including the 2-m autonomous robotic Faulkes North and Liverpool Telescopes, KAIT, S-LOTIS, and SRO. We also observed the burst with 8- and 10-m class telescopes and determine the redshift to be z = 1.0924 \\pm 0.0004. We find no correlation between th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.0313","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"}