{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:FRX3JCMLVGPX7NIRBMG5VMQLEQ","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":"a8d56c666394ed9aeb40e6dce25d52fb308f1020acb4655c7e8f1b9d16b11dbf","cross_cats_sorted":["astro-ph.GA","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-01-10T19:00:00Z","title_canon_sha256":"47da65f6c727f9c23e8b6513415546207d072c2379825ca9cbbbc41fe7de8158"},"schema_version":"1.0","source":{"id":"1901.03332","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.03332","created_at":"2026-05-17T23:55:42Z"},{"alias_kind":"arxiv_version","alias_value":"1901.03332v2","created_at":"2026-05-17T23:55:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.03332","created_at":"2026-05-17T23:55:42Z"},{"alias_kind":"pith_short_12","alias_value":"FRX3JCMLVGPX","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"FRX3JCMLVGPX7NIR","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"FRX3JCML","created_at":"2026-05-18T12:33:15Z"}],"graph_snapshots":[{"event_id":"sha256:66cc243aed1970dc2445a60bf01ff279f5aafcc95ec0239fff5a5efea8efb6cb","target":"graph","created_at":"2026-05-17T23:55:42Z","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"},"paper":{"abstract_excerpt":"Because core-collapse supernovae are the explosions of massive stars, which have relatively short lifetimes, they occur almost exclusively in galaxies with active star formation. On the other hand, the Type Ibn supernova PS1-12sk exploded in an environment much more typical of thermonuclear (Type Ia) supernovae: on the outskirts of the brightest elliptical galaxy in a galaxy cluster. The lack of any obvious star formation at that location presented a challenge to models of Type Ibn supernovae as the explosions of very massive Wolf-Rayet stars. Here we present a supplementary search for star fo","authors_text":"Ann I. Zabludoff, Curtis McCully, Daichi Hiramatsu, D. Andrew Howell, Edo Berger, Griffin Hosseinzadeh, Iair Arcavi, K. Decker French","cross_cats":["astro-ph.GA","astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-01-10T19:00:00Z","title":"Type Ibn Supernovae May not all Come from Massive Stars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.03332","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":"sha256:364ff7f2a7e13a42657a158887b0b300073e4c17764290c04948ef3872bff51e","target":"record","created_at":"2026-05-17T23:55:42Z","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":"a8d56c666394ed9aeb40e6dce25d52fb308f1020acb4655c7e8f1b9d16b11dbf","cross_cats_sorted":["astro-ph.GA","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-01-10T19:00:00Z","title_canon_sha256":"47da65f6c727f9c23e8b6513415546207d072c2379825ca9cbbbc41fe7de8158"},"schema_version":"1.0","source":{"id":"1901.03332","kind":"arxiv","version":2}},"canonical_sha256":"2c6fb4898ba99f7fb5110b0ddab20b242e349f8a2d121b69ddf7ff95df204fe3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2c6fb4898ba99f7fb5110b0ddab20b242e349f8a2d121b69ddf7ff95df204fe3","first_computed_at":"2026-05-17T23:55:42.277808Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:55:42.277808Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"w1jSwaOsVAnQlRoeWRg5ciol9tf3KXPOWBWFe9aTIzfde0b7XQcSWuC4yrLHKWC6OYB9ePF3pk4vlZXrHTrYAw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:55:42.278401Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.03332","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:364ff7f2a7e13a42657a158887b0b300073e4c17764290c04948ef3872bff51e","sha256:66cc243aed1970dc2445a60bf01ff279f5aafcc95ec0239fff5a5efea8efb6cb"],"state_sha256":"6619d8d7b7ab4ede879b7a7b0abf1a96e6a74ef0498f046a68cc0fe4ee8ce049"}