{"paper":{"title":"The earliest spectroscopy of the GRB 030329 afterglow with 6-m telescope","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. de Ugarte Postigo, A.J. Castro-Tirado, J. Gorosabel, S. Guziy, T.A. Fatkhullin, T.N.Sokolova, V.G. Kurt, V.N. Komarova, V.S. Lebedev, V.V. Sokolov","submitted_at":"2005-05-26T13:34:44Z","abstract_excerpt":"The earliest BTA (SAO RAS 6-m telescope) spectroscopic observations of the GRB 030329 optical transient (OT) are presented, which almost coincide in time with the \"first break\" ($t\\sim 0.5$ day after the GRB) of the OT light curve. The beginning of spectral changes are seen as early as $\\sim 10-12$ hours after the GRB. So, the onset of the spectral changes for $t<1$ day indicates that the contribution from Type Ic supernova (SN) into the OT optical flux can be detected earlier. The properties of early spectra of GRB 030329/SN 2003dh can be consistent with a shock moving into a stellar wind for"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0505535","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"}