{"paper":{"title":"A `Hypernova' model for SN 1998bw associated with gamma-ray burst of 25 April 1998","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"B.Leibundgut, C.Kouveliotou, C.Lidman, E.Cappellaro, E.Palazzi, E.Pian, F.Frontera, F.Patat, H.Boehnhardt, H.Umeda, I.J.Danziger, J.Brewer, J.-F.Gonzalez, J.van Paradijs, K.Iwamoto, K.Nomoto, M.Turatto, O.R.Hainaut, P.A.Mazzali, P.M.Vreeswijk, T.Augusteijn, T.J.Galama, T.Nakamura, T.R.Young, T.Shigeyama, T.Suzuki, V.Doublier","submitted_at":"1998-06-30T15:00:49Z","abstract_excerpt":"The discovery of the peculiar supernova (SN) 1998bw and its possible association with the gamma-ray burst (GRB) 980425$^{1,2,3}$ provide new clues to the understanding of the explosion mechanism of very massive stars and to the origin of some classes of gamma-ray bursts. Its spectra indicate that SN~1998bw is a type Ic supernova$^{3,4}$, but its peak luminosity is unusually high compared with typical type Ic supernovae$^3$. Here we report our findings that the optical spectra and the light curve of SN 1998bw can be well reproduced by an extremely energetic explosion of a massive carbon+oxygen "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9806382","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/astro-ph/9806382/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"}