{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2000:AOAXX2G5YCPUH4YQP55K3LNJIK","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":"5f5679a1be10fd17e601fa606e6c9002502137c43dd4a4e1f6407ad7e6cccdd4","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-02-28T20:38:08Z","title_canon_sha256":"97fdd30e182b7b492a6cf1747cdd6b9f890a3c7d508b55d3ce11677168a9388b"},"schema_version":"1.0","source":{"id":"astro-ph/0002509","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0002509","created_at":"2026-05-18T01:21:57Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0002509v1","created_at":"2026-05-18T01:21:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0002509","created_at":"2026-05-18T01:21:57Z"},{"alias_kind":"pith_short_12","alias_value":"AOAXX2G5YCPU","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"AOAXX2G5YCPUH4YQ","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"AOAXX2G5","created_at":"2026-05-18T12:25:49Z"}],"graph_snapshots":[{"event_id":"sha256:b1b42a9405e3b30a7cdc8ecc7a3c2069d56f9499544c5234614f19668793d0e9","target":"graph","created_at":"2026-05-18T01:21:57Z","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":"We consider some aspects of the evolution of massive stars which can only be elucidated by means of \"indirect\" observations, i.e. measurements of the effects of massive stars on their environments. We discuss in detail the early evolution of massive stars formed in high metallicity regions as inferred from studies of HII regions in external galaxies.","authors_text":"Nino Panagia (ESA/STScI)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2000-02-28T20:38:08Z","title":"Observational Constraints to the Evolution of Massive Stars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0002509","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":"sha256:5c162559b4f1e197911c76d6f8c73aee57d532f8e9470b43171fb61a4a40a725","target":"record","created_at":"2026-05-18T01:21:57Z","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":"5f5679a1be10fd17e601fa606e6c9002502137c43dd4a4e1f6407ad7e6cccdd4","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-02-28T20:38:08Z","title_canon_sha256":"97fdd30e182b7b492a6cf1747cdd6b9f890a3c7d508b55d3ce11677168a9388b"},"schema_version":"1.0","source":{"id":"astro-ph/0002509","kind":"arxiv","version":1}},"canonical_sha256":"03817be8ddc09f43f3107f7aadada942965d2b3f3c17953f2d41e1dd0cc520e2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"03817be8ddc09f43f3107f7aadada942965d2b3f3c17953f2d41e1dd0cc520e2","first_computed_at":"2026-05-18T01:21:57.203370Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:21:57.203370Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hzH/c7/OA03k6iMjmT+IDqvO/v3gN+4Xbv2CLvIMALyF6U6HSeg75eQ67nHYRbN/j0basGCDmhYBBjyqlhZNAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:21:57.204055Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0002509","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5c162559b4f1e197911c76d6f8c73aee57d532f8e9470b43171fb61a4a40a725","sha256:b1b42a9405e3b30a7cdc8ecc7a3c2069d56f9499544c5234614f19668793d0e9"],"state_sha256":"98dd357b9f3c3622ec98e66a19a3fe246ebd4b288febf72229a97ad5633ce357"}