{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:AUJCWUB7CCL4TRXSZ6H6UXGI54","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":"ae947b0ef1a05fe2dfe67677011cb09b3c7979824b5302c39ed155a459db8bf6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-10-10T15:08:49Z","title_canon_sha256":"30e20c3bef9b73f061a88e5f6e1118e8d1f3b473d12fc9623b771a2ff24074e6"},"schema_version":"1.0","source":{"id":"1310.2849","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1310.2849","created_at":"2026-05-18T01:47:06Z"},{"alias_kind":"arxiv_version","alias_value":"1310.2849v1","created_at":"2026-05-18T01:47:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1310.2849","created_at":"2026-05-18T01:47:06Z"},{"alias_kind":"pith_short_12","alias_value":"AUJCWUB7CCL4","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_16","alias_value":"AUJCWUB7CCL4TRXS","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_8","alias_value":"AUJCWUB7","created_at":"2026-05-18T12:27:38Z"}],"graph_snapshots":[{"event_id":"sha256:c367a18fabe6bda74890e3f6ac29b22d920fff9cedcaf6f76930ff14cfd43dad","target":"graph","created_at":"2026-05-18T01:47:06Z","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":"Context. Oxygen sequence Wolf-Rayet (WO) stars are thought to represent the final evolutionary stage of the most massive stars. The characteristic strong O vi emission possibly originates from an enhanced oxygen abundance in the stellar wind. Alternatively, the O vi emission can be caused by the high temperature of these stars, in which case the WO stars are the high-temperature extension of the more common carbon sequence Wolf-Rayet (WC) stars. Aims. By constraining the physical properties and evolutionary status of DR1, a WO star in the low-metallicity Local Group dwarf galaxy IC 1613 and on","authors_text":"A. de Koter, F. Tramper, G. Gr\\\"afener, H. Sana, J.S. Vink, L.E. Ellerbroek, L. Kaper, M. Garcia, N. Langer, O.E. Hartoog, S.E. de Mink","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-10-10T15:08:49Z","title":"On the nature of WO stars: a quantitative analysis of the WO3 star DR1 in IC 1613"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.2849","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:e579e76e4f23fd46a19152e9f9f281fdeada49502f7528d0dd8fbee4eaaa4fda","target":"record","created_at":"2026-05-18T01:47:06Z","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":"ae947b0ef1a05fe2dfe67677011cb09b3c7979824b5302c39ed155a459db8bf6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-10-10T15:08:49Z","title_canon_sha256":"30e20c3bef9b73f061a88e5f6e1118e8d1f3b473d12fc9623b771a2ff24074e6"},"schema_version":"1.0","source":{"id":"1310.2849","kind":"arxiv","version":1}},"canonical_sha256":"05122b503f1097c9c6f2cf8fea5cc8ef088d7b6f4b65aff57ef6a68ffee55481","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"05122b503f1097c9c6f2cf8fea5cc8ef088d7b6f4b65aff57ef6a68ffee55481","first_computed_at":"2026-05-18T01:47:06.911920Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:47:06.911920Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NOINh5icQFIal66VFSaEWIjeBue7zKWEp0nvB2MEz6RN7I/5brey0SvHTdmeFvhp6UbUh2OqkdxD9dvUQOmECw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:47:06.912576Z","signed_message":"canonical_sha256_bytes"},"source_id":"1310.2849","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e579e76e4f23fd46a19152e9f9f281fdeada49502f7528d0dd8fbee4eaaa4fda","sha256:c367a18fabe6bda74890e3f6ac29b22d920fff9cedcaf6f76930ff14cfd43dad"],"state_sha256":"6a5ef2a0753e03229155ae59c84c71d427908012ad90c669695430f498cfff7d"}