{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:GPXNIVUKLZL32AKMOKSTKQD65K","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":"f67da54341c714160b5755908e2588d6ae908ac0eb730c55447cac3b68859b76","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-04-13T20:14:08Z","title_canon_sha256":"9d8adc880ff1a62bd70b7bd65d960d2076d24a108511926b7ed17fa565499e92"},"schema_version":"1.0","source":{"id":"1504.03349","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.03349","created_at":"2026-05-18T02:03:32Z"},{"alias_kind":"arxiv_version","alias_value":"1504.03349v1","created_at":"2026-05-18T02:03:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.03349","created_at":"2026-05-18T02:03:32Z"},{"alias_kind":"pith_short_12","alias_value":"GPXNIVUKLZL3","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_16","alias_value":"GPXNIVUKLZL32AKM","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_8","alias_value":"GPXNIVUK","created_at":"2026-05-18T12:29:22Z"}],"graph_snapshots":[{"event_id":"sha256:b1120799f58ea5d2cf53512c640e921a5b12fd9426437408071c6a5edcefaa23","target":"graph","created_at":"2026-05-18T02:03:32Z","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":"During the late stages of their evolution, Sun-like stars bring the products of nuclear burning to the surface. Most of the carbon in the Universe is believed to originate from stars with masses up to a few solar masses. Although there is a chemical dichotomy between oxygen-rich and carbon-rich evolved stars, the dredge-up itself has never been directly observed. In the last three decades, however, a few stars have been shown to display both carbon- and oxygen-rich material in their circumstellar envelopes. Two models have been proposed to explain this dual chemistry: one postulates that a rec","authors_text":"A. A. Zijlstra, A. I. Karakas, A. Muller, A. Smette, D. Jones, E. Lagadec, G. C. Sloan, H. M. J. Boffin, Lars-Ake Nyman, L. Guzman-Ramirez, M. P. Redman, R. Wesson","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-04-13T20:14:08Z","title":"Witnessing the Emergence of a Carbon Star"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.03349","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":"sha256:7801f3f268546f8f89e30f3a1bceeed65b54c7abacc5ece50c2c3d256dcef082","target":"record","created_at":"2026-05-18T02:03:32Z","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":"f67da54341c714160b5755908e2588d6ae908ac0eb730c55447cac3b68859b76","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-04-13T20:14:08Z","title_canon_sha256":"9d8adc880ff1a62bd70b7bd65d960d2076d24a108511926b7ed17fa565499e92"},"schema_version":"1.0","source":{"id":"1504.03349","kind":"arxiv","version":1}},"canonical_sha256":"33eed4568a5e57bd014c72a535407eeaa4bfb40886df18eaa39d397083fccb65","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"33eed4568a5e57bd014c72a535407eeaa4bfb40886df18eaa39d397083fccb65","first_computed_at":"2026-05-18T02:03:32.832993Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:03:32.832993Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AO0VNiCOGUT4QgkUl/VmZI9ucqLGfqpFv0kkYvSKgYRuEuK0GOnyq/8oXvsew5tEVkgGu8VMnHHzgE7qavkHDg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:03:32.833713Z","signed_message":"canonical_sha256_bytes"},"source_id":"1504.03349","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7801f3f268546f8f89e30f3a1bceeed65b54c7abacc5ece50c2c3d256dcef082","sha256:b1120799f58ea5d2cf53512c640e921a5b12fd9426437408071c6a5edcefaa23"],"state_sha256":"c34f39c5bab84c44696bc5df08dfd110ed3897c28849b34934325ddc3b5ce9fc"}