{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1998:MGB6DCEVPMKHXWPDTFRAS35JS5","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"a29d05ba9d7c3733de085c527be0aa295c998d3366c1d82dea0362ba080b8589","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1998-06-30T15:00:49Z","title_canon_sha256":"9faad540eb1d6d6dcda350e1a357ca656f9978d2c375f46de21f9f60fb2165b7"},"schema_version":"1.0","source":{"id":"astro-ph/9806382","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9806382","created_at":"2026-07-04T16:06:48Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9806382v2","created_at":"2026-07-04T16:06:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9806382","created_at":"2026-07-04T16:06:48Z"},{"alias_kind":"pith_short_12","alias_value":"MGB6DCEVPMKH","created_at":"2026-07-04T16:06:48Z"},{"alias_kind":"pith_short_16","alias_value":"MGB6DCEVPMKHXWPD","created_at":"2026-07-04T16:06:48Z"},{"alias_kind":"pith_short_8","alias_value":"MGB6DCEV","created_at":"2026-07-04T16:06:48Z"}],"graph_snapshots":[{"event_id":"sha256:1ce719a61af06c20e37ed4915fc09eab7fbf0a51f105217bee503ccc41abe03b","target":"graph","created_at":"2026-07-04T16:06:48Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/astro-ph/9806382/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"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 ","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","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1998-06-30T15:00:49Z","title":"A `Hypernova' model for SN 1998bw associated with gamma-ray burst of 25 April 1998"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9806382","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:60fad06c96760d26c2f8e74b1a75d2759b63d69015f822684dd238d1126b26c2","target":"record","created_at":"2026-07-04T16:06:48Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"a29d05ba9d7c3733de085c527be0aa295c998d3366c1d82dea0362ba080b8589","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1998-06-30T15:00:49Z","title_canon_sha256":"9faad540eb1d6d6dcda350e1a357ca656f9978d2c375f46de21f9f60fb2165b7"},"schema_version":"1.0","source":{"id":"astro-ph/9806382","kind":"arxiv","version":2}},"canonical_sha256":"6183e188957b147bd9e39962096fa99760f5431b2bb82d9405837c0c6e8ed972","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6183e188957b147bd9e39962096fa99760f5431b2bb82d9405837c0c6e8ed972","first_computed_at":"2026-07-04T16:06:48.949619Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:06:48.949619Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1FuqGUy0dz66YrcvtOYPu54DC0LRFTHPU5r5YbqM+Rl0mRxR5wdWLPiJKwl8eG2df8/Roi5Gk9TZzhxBSodPBw==","signature_status":"signed_v1","signed_at":"2026-07-04T16:06:48.950065Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9806382","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:60fad06c96760d26c2f8e74b1a75d2759b63d69015f822684dd238d1126b26c2","sha256:1ce719a61af06c20e37ed4915fc09eab7fbf0a51f105217bee503ccc41abe03b"],"state_sha256":"09c57cc36d6e02fff49908befc3c0a3cf5b937cec457f4d269303eb167d9bb0d"}