{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2004:DD52GS4PFAJQS6VN6WV6QAELRE","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":"147cf71c1468291ad044bfcada19e1d7b1ba144249209233d1270a3dbb2ce83e","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-11-29T10:44:35Z","title_canon_sha256":"1df016df1f178ad29a63c51ab27c53e59cb5317dd78b5505f1be224052160dff"},"schema_version":"1.0","source":{"id":"astro-ph/0411756","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0411756","created_at":"2026-07-04T16:45:18Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0411756v1","created_at":"2026-07-04T16:45:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0411756","created_at":"2026-07-04T16:45:18Z"},{"alias_kind":"pith_short_12","alias_value":"DD52GS4PFAJQ","created_at":"2026-07-04T16:45:18Z"},{"alias_kind":"pith_short_16","alias_value":"DD52GS4PFAJQS6VN","created_at":"2026-07-04T16:45:18Z"},{"alias_kind":"pith_short_8","alias_value":"DD52GS4P","created_at":"2026-07-04T16:45:18Z"}],"graph_snapshots":[{"event_id":"sha256:03a36c741543705035dd2fb61cf513b441f70fee8b432d44d294986676bfc3f2","target":"graph","created_at":"2026-07-04T16:45:18Z","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/0411756/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present new Period-Age (PA) and Period-Age-Color (PAC) relations for fundamental and first overtone classical Cepheids. Current predictions rely on homogeneous sets of evolutionary and pulsation models covering a broad range of stellar masses and chemical compositions. We found that PA and PAC relations present a mild dependence upon metal content. Moreover, the use of different PA and PAC relation for fundamental and first overtone Cepheids improves the accuracy of age estimates in the short-period (log P < 1) range (old Cepheids), because they present smaller intrinsic dispersions. At the","authors_text":"F. Caputo (INAF-Osservatorio Astronomico di Roma), G. Bono (INAF-Osservatorio Astronomico di Roma), G. Pietrzynski (Warsaw University Observatory), M. Marconi (INAF- Osservatorio Astronomico di Capodimonte), S. Cassisi (INAF-Osservatorio Astronomico di Teramo), W. Gieren (Universidad de Concepcion)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2004-11-29T10:44:35Z","title":"Classical Cepheid Pulsation Models. X. The Period-Age Relation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0411756","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":"sha256:6546baf7da4b25ac8c5cc7743e745c59d504c01f52951d51111aebe6d68b80b7","target":"record","created_at":"2026-07-04T16:45:18Z","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":"147cf71c1468291ad044bfcada19e1d7b1ba144249209233d1270a3dbb2ce83e","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-11-29T10:44:35Z","title_canon_sha256":"1df016df1f178ad29a63c51ab27c53e59cb5317dd78b5505f1be224052160dff"},"schema_version":"1.0","source":{"id":"astro-ph/0411756","kind":"arxiv","version":1}},"canonical_sha256":"18fba34b8f2813097aadf5abe8008b893d18281d48c63236808e3dec4a2b7c04","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"18fba34b8f2813097aadf5abe8008b893d18281d48c63236808e3dec4a2b7c04","first_computed_at":"2026-07-04T16:45:18.880430Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:45:18.880430Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MM1AJZ2mSDfmnVaqQtHiklj4oZ1dMoaQ8oO4X7mMh2pXohaC5rWB5jpvmaXNnrOzUUtGO9gu02Z6Rq66qJO1Aw==","signature_status":"signed_v1","signed_at":"2026-07-04T16:45:18.880819Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0411756","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6546baf7da4b25ac8c5cc7743e745c59d504c01f52951d51111aebe6d68b80b7","sha256:03a36c741543705035dd2fb61cf513b441f70fee8b432d44d294986676bfc3f2"],"state_sha256":"902685da9272bd5b3fcc0febb5ccb4d643614de5f0eb56fe3ac0e2b3b55e65ed"}