{"paper":{"title":"The optical light curve of GRB 221009A: the afterglow and the emerging supernova","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. K. H. Kong, A. L. Piro, A. Rest, A. S. B. Schultz, A. Singh, A. V. Villar, C.-C. Lin, C.-C. Ngeow, C. D. Kilpatrick, C. Rojas-Bravo, D. A. Coulter, D. O. Jones, D. R. Young, E. A. Magnier, E. Ramirez-Ruiz, G. Narayan, H. Gao, I. A. Smith, J. Bright, J. Bulger, J. Fairlamb, J. Hjorth, J. Sommer, K. C. Chambers, K.-S. Lee, K. W. Davis, K. W. Smith, L. Izzo, L. Rhodes, M. D. Fulton, M. E. Huber, M. Nicholl, P. McGill, Q. Wang, R. J. Foley, R. Ridden-Harper, R. Wainscoat, S. A. Sim, S. J. Smartt, S. K. Yadavalli, S. Srivastav, S. Yang, T. de Boer, T. Lowe, T. Moore, T.-W. Chen, V. Ramakrishnan, Y.-C. Pan, Y. Zenati","submitted_at":"2023-01-25T13:32:08Z","abstract_excerpt":"We present extensive optical photometry of the afterglow of GRB~221009A. Our data cover $0.9 - 59.9$\\,days from the time of \\textit{Swift} and \\textit{Fermi} GRB detections. Photometry in $rizy$-band filters was collected primarily with Pan-STARRS and supplemented by multiple 1- to 4-meter imaging facilities. We analyzed the Swift X-ray data of the afterglow and found a single decline rate power-law $f(t) \\propto t^{-1.556\\pm0.002}$ best describes the light curve. In addition to the high foreground Milky Way dust extinction along this line of sight, the data favour additional extinction to con"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2301.11170","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2301.11170/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}