{"paper":{"title":"Constraining the location of rapid gamma-ray flares in the FSRQ 3C 273","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.HE","authors_text":"(2) Universit\\'e Bordeaux 1, Auf dem H\\\"ugel 69, B. Lott (2), B. Rani (1), Centre d'Etudes Nucl\\'eaires de Bordeaux Gradignan, CNRS/IN2P3, France), Germany, J.A. Zensus (1) ((1) Max-Planck-Institut f\\\"ur Radioastronomie (MPIfR), T. P. Krichbaum (1) L. Fuhrmann (1)","submitted_at":"2013-07-02T21:19:06Z","abstract_excerpt":"We present a \\gamma-ray photon flux and spectral variability study of the flat-spectrum radio quasar 3C 273 over a rapid flaring activity period between September 2009 to April 2010. Five major flares are observed in the source during this period. The most rapid flare observed in the source has a flux doubling time of 1.1 hr. The rapid \\gamma-ray flares allow us to constrain the location and size of the \\gamma-ray emission region in the source. The \\gamma \\gamma-opacity constrains the Doppler factor, $\\delta_{\\gamma} \\geq$ 10 for the highest energy (15 GeV) photon observed by the {\\it Fermi}-L"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.0854","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"}