{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:7YXUYGT4HHOB2TRCFQFY7QUILM","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":"034999c301bb8cb2ff10ab16a6cb5a99a5b0e1e99f01b67680aef19cb5f52d62","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-08-30T23:24:46Z","title_canon_sha256":"d4219b89cc3353ab20216cbb9340f59b3c6e063e5e99e5249a16e5a06f6facdb"},"schema_version":"1.0","source":{"id":"1309.0047","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.0047","created_at":"2026-05-18T01:47:51Z"},{"alias_kind":"arxiv_version","alias_value":"1309.0047v1","created_at":"2026-05-18T01:47:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.0047","created_at":"2026-05-18T01:47:51Z"},{"alias_kind":"pith_short_12","alias_value":"7YXUYGT4HHOB","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_16","alias_value":"7YXUYGT4HHOB2TRC","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_8","alias_value":"7YXUYGT4","created_at":"2026-05-18T12:27:38Z"}],"graph_snapshots":[{"event_id":"sha256:747124b32f1d17082c376b140e2b1df190fb5c93fa48045a9e8dece0b79f1fb5","target":"graph","created_at":"2026-05-18T01:47:51Z","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":"Observations of metal-poor extragalactic H II regions allow the determination of the primordial helium abundance, Y_p. The He I emissivities are the foundation of the model of the H II region's emission. Porter, Ferland, Storey, & Detisch (2012) have recently published updated He I emissivities based on improved photoionization cross-sections. We incorporate these new atomic data and update our recent Markov Chain Monte Carlo analysis of the dataset published by Izotov, Thuan, & Stasinska (2007). As before, cuts are made to promote quality and reliability, and only solutions which fit the data","authors_text":"Erik Aver, Evan D. Skillman, Keith A. Olive, R. L. Porter","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-08-30T23:24:46Z","title":"The primordial helium abundance from updated emissivities"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.0047","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:ca8c14275f062a007054eeffbc03a2da654f03e26fb44092cb1e50aec4c6bc4b","target":"record","created_at":"2026-05-18T01:47:51Z","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":"034999c301bb8cb2ff10ab16a6cb5a99a5b0e1e99f01b67680aef19cb5f52d62","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-08-30T23:24:46Z","title_canon_sha256":"d4219b89cc3353ab20216cbb9340f59b3c6e063e5e99e5249a16e5a06f6facdb"},"schema_version":"1.0","source":{"id":"1309.0047","kind":"arxiv","version":1}},"canonical_sha256":"fe2f4c1a7c39dc1d4e222c0b8fc2885b37fce79de82d308ab2a723b350005e12","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fe2f4c1a7c39dc1d4e222c0b8fc2885b37fce79de82d308ab2a723b350005e12","first_computed_at":"2026-05-18T01:47:51.074535Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:47:51.074535Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xZcdJq14HYLUoWLzrvAtRsUu/yuo4LciPrdRmWs45UCvfrxKPxJe7UUUNhNvWZtFtTxZkJE4dlBMhbEqvnPJBw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:47:51.075046Z","signed_message":"canonical_sha256_bytes"},"source_id":"1309.0047","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ca8c14275f062a007054eeffbc03a2da654f03e26fb44092cb1e50aec4c6bc4b","sha256:747124b32f1d17082c376b140e2b1df190fb5c93fa48045a9e8dece0b79f1fb5"],"state_sha256":"d2a570d7cf3f74b62e88b1b2cfc1ddcc06f3b37ee62f2613e37c128f6c84bec6"}