{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:G2URAMZ23KN4NQUOASNOUSKLR5","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":"38726c1d6c7612b1ea9f98ce8e1bcd4352c6bf08e265577ecec2a1c822bd271c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-03-25T12:15:57Z","title_canon_sha256":"b4d7ab7290527814f59163ca40abb97e71068fecc9e0a166ddf6e1bfcfd3da53"},"schema_version":"1.0","source":{"id":"1303.6593","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1303.6593","created_at":"2026-05-18T01:50:52Z"},{"alias_kind":"arxiv_version","alias_value":"1303.6593v1","created_at":"2026-05-18T01:50:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.6593","created_at":"2026-05-18T01:50:52Z"},{"alias_kind":"pith_short_12","alias_value":"G2URAMZ23KN4","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_16","alias_value":"G2URAMZ23KN4NQUO","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_8","alias_value":"G2URAMZ2","created_at":"2026-05-18T12:27:45Z"}],"graph_snapshots":[{"event_id":"sha256:30242159a1196a0f23bd219a87d4b1e914d3f6bda724c8dd74f38341d907cbd3","target":"graph","created_at":"2026-05-18T01:50:52Z","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":"With an aim of investigating the nature of evolution-induced mixing in the envelope of evolved intermediate-mass stars, we carried out an extensive spectroscopic study for 12 Cepheid variables of various pulsation periods (~2-16 days) to determine the photospheric abundances of C, N, O, and Na, which are the key elements for investigating how the H-burning products are salvaged from the interior, based on 122 high-dispersion echelle spectra (~10 per target) of wide wavelength coverage collected at Bohyunsan Astronomical Observatory. Having established the relevant atmospheric parameters corres","authors_text":"B.-C. Lee, D.-I. Kang, I. Han, K.-M. Kim, Y. Takeda","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-03-25T12:15:57Z","title":"C, N, O, and Na Abundances of Cepheid Variables: Implications on the Mixing Process in the Envelope"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.6593","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:ce17787b616cd48b2ff962128c8a73ae3930718f2750d8991937978840245940","target":"record","created_at":"2026-05-18T01:50:52Z","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":"38726c1d6c7612b1ea9f98ce8e1bcd4352c6bf08e265577ecec2a1c822bd271c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-03-25T12:15:57Z","title_canon_sha256":"b4d7ab7290527814f59163ca40abb97e71068fecc9e0a166ddf6e1bfcfd3da53"},"schema_version":"1.0","source":{"id":"1303.6593","kind":"arxiv","version":1}},"canonical_sha256":"36a910333ada9bc6c28e049aea494b8f6e82da3403b00da977c874f7c7341ba6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"36a910333ada9bc6c28e049aea494b8f6e82da3403b00da977c874f7c7341ba6","first_computed_at":"2026-05-18T01:50:52.452277Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:50:52.452277Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"taMSpHjsWPcMIYGgBliQ7m5ZvxA224d6maTmeUuujSQ0aNwaTGu/RT2oAkukl3w78Fwf7YdgyLYk1MRwZ9IiBw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:50:52.453111Z","signed_message":"canonical_sha256_bytes"},"source_id":"1303.6593","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ce17787b616cd48b2ff962128c8a73ae3930718f2750d8991937978840245940","sha256:30242159a1196a0f23bd219a87d4b1e914d3f6bda724c8dd74f38341d907cbd3"],"state_sha256":"abe7972028e368c4b868239068c79547010a49c81320004c3670c78e3a70d76b"}