{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2004:MHYLJ4F7ER5DSRON5FCMIJMWCQ","short_pith_number":"pith:MHYLJ4F7","canonical_record":{"source":{"id":"astro-ph/0401235","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-01-13T15:16:38Z","cross_cats_sorted":[],"title_canon_sha256":"4da200039dc609f8ea1638843fcfcdf64dedddbdb1ec827f36a8aecb209e4940","abstract_canon_sha256":"8136e6ffac521c4f109f04c4da99297cea8a71b57d8f33e847ffa42d5aed2743"},"schema_version":"1.0"},"canonical_sha256":"61f0b4f0bf247a3945cde944c42596142b0938b56bf07a6fe79516ea90d7409f","source":{"kind":"arxiv","id":"astro-ph/0401235","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0401235","created_at":"2026-07-04T16:42:49Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0401235v1","created_at":"2026-07-04T16:42:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0401235","created_at":"2026-07-04T16:42:49Z"},{"alias_kind":"pith_short_12","alias_value":"MHYLJ4F7ER5D","created_at":"2026-07-04T16:42:49Z"},{"alias_kind":"pith_short_16","alias_value":"MHYLJ4F7ER5DSRON","created_at":"2026-07-04T16:42:49Z"},{"alias_kind":"pith_short_8","alias_value":"MHYLJ4F7","created_at":"2026-07-04T16:42:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2004:MHYLJ4F7ER5DSRON5FCMIJMWCQ","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0401235","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-01-13T15:16:38Z","cross_cats_sorted":[],"title_canon_sha256":"4da200039dc609f8ea1638843fcfcdf64dedddbdb1ec827f36a8aecb209e4940","abstract_canon_sha256":"8136e6ffac521c4f109f04c4da99297cea8a71b57d8f33e847ffa42d5aed2743"},"schema_version":"1.0"},"canonical_sha256":"61f0b4f0bf247a3945cde944c42596142b0938b56bf07a6fe79516ea90d7409f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:42:49.585405Z","signature_b64":"s0h1+pVoxGFAYEBSqsRgIzoH5jfDnmvMogFxD2auls7+e4EwIy9RbHqpGjmGT3xLeP0Mg7BtScFLs4ZaRSKZCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"61f0b4f0bf247a3945cde944c42596142b0938b56bf07a6fe79516ea90d7409f","last_reissued_at":"2026-07-04T16:42:49.584908Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:42:49.584908Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0401235","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T16:42:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+BOcyDXi8nl4Npr2Vq5OcUtncf3/SaffZauc92fxUbYXdiv18wLwiLoc1kSbn6CckpF32aLIb4Xu1STLWEu5AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T08:13:08.920304Z"},"content_sha256":"edbd88463bee91f450891cb1a966fd3d03b8ab562d1a2ca773bd3b3b5e03b48a","schema_version":"1.0","event_id":"sha256:edbd88463bee91f450891cb1a966fd3d03b8ab562d1a2ca773bd3b3b5e03b48a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2004:MHYLJ4F7ER5DSRON5FCMIJMWCQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Detection of a red supergiant progenitor star of a type II-plateau supernova","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Cambridge), C. A. Tout, C. R. Benn (ING), G. F. Gilmore (IoA, J. R. Maund, M. A. Hendry, S. J. Smartt, S. Mattila (Stockholm Obs.)","submitted_at":"2004-01-13T15:16:38Z","abstract_excerpt":"We present the discovery of a red supergiant star that exploded as supernova 2003gd in the nearby spiral galaxy M74. The Hubble Space Telescope (HST) and the Gemini Telescope imaged this galaxy 6 to 9 months before the supernova explosion and subsequent HST images confirm the positional coincidence of the supernova with a single,resolved star which is an 8 +4/-2 solar mass red supergiant. This confirms both stellar evolution models and supernova theories which predict that type II-Plateau supernovae have cool red supergiants as their immediate progenitor stars."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0401235","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/0401235/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T16:42:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zlFA0H5EfCCKOtO05sugj0falTs9VAEsILTmM18ZbqvpYjy6NocC9vcOoLSNYdWYlWp2aaq9An5JWIkFclSfDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T08:13:08.920806Z"},"content_sha256":"93dab9c0569a88ec6373ef0b6b321a57571a288ad2227a1bb12edbc1e9f09e29","schema_version":"1.0","event_id":"sha256:93dab9c0569a88ec6373ef0b6b321a57571a288ad2227a1bb12edbc1e9f09e29"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MHYLJ4F7ER5DSRON5FCMIJMWCQ/bundle.json","state_url":"https://pith.science/pith/MHYLJ4F7ER5DSRON5FCMIJMWCQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MHYLJ4F7ER5DSRON5FCMIJMWCQ/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-05T08:13:08Z","links":{"resolver":"https://pith.science/pith/MHYLJ4F7ER5DSRON5FCMIJMWCQ","bundle":"https://pith.science/pith/MHYLJ4F7ER5DSRON5FCMIJMWCQ/bundle.json","state":"https://pith.science/pith/MHYLJ4F7ER5DSRON5FCMIJMWCQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MHYLJ4F7ER5DSRON5FCMIJMWCQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2004:MHYLJ4F7ER5DSRON5FCMIJMWCQ","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":"8136e6ffac521c4f109f04c4da99297cea8a71b57d8f33e847ffa42d5aed2743","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-01-13T15:16:38Z","title_canon_sha256":"4da200039dc609f8ea1638843fcfcdf64dedddbdb1ec827f36a8aecb209e4940"},"schema_version":"1.0","source":{"id":"astro-ph/0401235","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0401235","created_at":"2026-07-04T16:42:49Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0401235v1","created_at":"2026-07-04T16:42:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0401235","created_at":"2026-07-04T16:42:49Z"},{"alias_kind":"pith_short_12","alias_value":"MHYLJ4F7ER5D","created_at":"2026-07-04T16:42:49Z"},{"alias_kind":"pith_short_16","alias_value":"MHYLJ4F7ER5DSRON","created_at":"2026-07-04T16:42:49Z"},{"alias_kind":"pith_short_8","alias_value":"MHYLJ4F7","created_at":"2026-07-04T16:42:49Z"}],"graph_snapshots":[{"event_id":"sha256:93dab9c0569a88ec6373ef0b6b321a57571a288ad2227a1bb12edbc1e9f09e29","target":"graph","created_at":"2026-07-04T16:42:49Z","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/0401235/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present the discovery of a red supergiant star that exploded as supernova 2003gd in the nearby spiral galaxy M74. The Hubble Space Telescope (HST) and the Gemini Telescope imaged this galaxy 6 to 9 months before the supernova explosion and subsequent HST images confirm the positional coincidence of the supernova with a single,resolved star which is an 8 +4/-2 solar mass red supergiant. This confirms both stellar evolution models and supernova theories which predict that type II-Plateau supernovae have cool red supergiants as their immediate progenitor stars.","authors_text":"Cambridge), C. A. Tout, C. R. Benn (ING), G. F. Gilmore (IoA, J. R. Maund, M. A. Hendry, S. J. Smartt, S. Mattila (Stockholm Obs.)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2004-01-13T15:16:38Z","title":"Detection of a red supergiant progenitor star of a type II-plateau supernova"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0401235","kind":"arxiv","version":1},"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:edbd88463bee91f450891cb1a966fd3d03b8ab562d1a2ca773bd3b3b5e03b48a","target":"record","created_at":"2026-07-04T16:42:49Z","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":"8136e6ffac521c4f109f04c4da99297cea8a71b57d8f33e847ffa42d5aed2743","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-01-13T15:16:38Z","title_canon_sha256":"4da200039dc609f8ea1638843fcfcdf64dedddbdb1ec827f36a8aecb209e4940"},"schema_version":"1.0","source":{"id":"astro-ph/0401235","kind":"arxiv","version":1}},"canonical_sha256":"61f0b4f0bf247a3945cde944c42596142b0938b56bf07a6fe79516ea90d7409f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"61f0b4f0bf247a3945cde944c42596142b0938b56bf07a6fe79516ea90d7409f","first_computed_at":"2026-07-04T16:42:49.584908Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:42:49.584908Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"s0h1+pVoxGFAYEBSqsRgIzoH5jfDnmvMogFxD2auls7+e4EwIy9RbHqpGjmGT3xLeP0Mg7BtScFLs4ZaRSKZCA==","signature_status":"signed_v1","signed_at":"2026-07-04T16:42:49.585405Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0401235","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:edbd88463bee91f450891cb1a966fd3d03b8ab562d1a2ca773bd3b3b5e03b48a","sha256:93dab9c0569a88ec6373ef0b6b321a57571a288ad2227a1bb12edbc1e9f09e29"],"state_sha256":"5dac0ff518711c12cfb33d5a9390f027e62949773bf58713ed514b9a4a55d2ec"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uLCDlhov6VjwZl+7Ms+sdLw+uQjc14/5tCsACSKD967jiU3evTxsNeMyK2y8ttf1qAH0Q+cPSsEXyfXp8DeXDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T08:13:08.925564Z","bundle_sha256":"59678e4731366d7010918648469cc8bf1216d24150386d2950d85785d9676048"}}