{"paper":{"title":"Swift observations of GRB050128: the early X-ray afterglow","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. Breeveld, A.F. Abbey, A. Moretti, A.P. Beardmore, B. Zhang, C. Gronwall, C. Pagani, D. Malesani, D.N. Burrows, G. Chincarini, G. Cusumano, G. Tagliaferri, J.A. Kennea, J.A. Nousek, J.E. Hill, J.P. Osborne, K.L. Page, K.O. Mason, L.A. Antonelli, L. Angelini, M. Capalbi, M. Perri, M.R. Goad, N. Gehrels, O. Godet, P. Boyd, P. Giommi, P. Kumar, P. Meszaros, P. Romano, P.W.A. Roming, S. Campana, S. Covino, S. Kobayashi, T. Poole, V. Mangano","submitted_at":"2005-04-14T15:53:48Z","abstract_excerpt":"Swift discovered GRB050128 with the Burst Alert Telescope and promptly pointed its narrow field instruments to monitor the afterglow. X-ray observations started 108 s after the trigger time. The early decay of the afterglow is relatively flat with a temporal decay modeled with a power law with index ~ -0.3. A steepening occurs at later times (~ 1500 s) with a power law index of ~ -1.3. During this transition, the observed X-ray spectrum does not change. We interpret this behaviour as either an early jet break or evidence for a transition from the fast cooling regime to the slow cooling regime "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0504331","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0504331/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"}