{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2005:L5YFUWTLNHKJTVV4SL7VSXIKG3","short_pith_number":"pith:L5YFUWTL","canonical_record":{"source":{"id":"astro-ph/0512320","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2005-12-13T11:53:01Z","cross_cats_sorted":[],"title_canon_sha256":"b8ff32555ed3fe9f7d22624695bff8957c9e64a430b65501b9e7faa7e2439372","abstract_canon_sha256":"fb8669b8ca1a734bdbde675082885f5250698ad05d0da78ac86552d12da023e7"},"schema_version":"1.0"},"canonical_sha256":"5f705a5a6b69d499d6bc92ff595d0a36de575be5a77eceaecff900dcd1290023","source":{"kind":"arxiv","id":"astro-ph/0512320","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0512320","created_at":"2026-07-04T17:14:43Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0512320v1","created_at":"2026-07-04T17:14:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0512320","created_at":"2026-07-04T17:14:43Z"},{"alias_kind":"pith_short_12","alias_value":"L5YFUWTLNHKJ","created_at":"2026-07-04T17:14:43Z"},{"alias_kind":"pith_short_16","alias_value":"L5YFUWTLNHKJTVV4","created_at":"2026-07-04T17:14:43Z"},{"alias_kind":"pith_short_8","alias_value":"L5YFUWTL","created_at":"2026-07-04T17:14:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2005:L5YFUWTLNHKJTVV4SL7VSXIKG3","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0512320","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2005-12-13T11:53:01Z","cross_cats_sorted":[],"title_canon_sha256":"b8ff32555ed3fe9f7d22624695bff8957c9e64a430b65501b9e7faa7e2439372","abstract_canon_sha256":"fb8669b8ca1a734bdbde675082885f5250698ad05d0da78ac86552d12da023e7"},"schema_version":"1.0"},"canonical_sha256":"5f705a5a6b69d499d6bc92ff595d0a36de575be5a77eceaecff900dcd1290023","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:14:43.465212Z","signature_b64":"eeGKVDcNb9KJpg+oDOF616bwJZJe0QChjwPstJ8TfihaiWdRr7UL6dBpGfJNlSER2X4AedVVb6dZWwtZie9aAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5f705a5a6b69d499d6bc92ff595d0a36de575be5a77eceaecff900dcd1290023","last_reissued_at":"2026-07-04T17:14:43.464838Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:14:43.464838Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0512320","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T17:14:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"U8bdgySNsrXgbgUVeasYO1Uxmh/zi2QXIgGlVKT0/lO7eA8QXBFT3VXT0U3vftRfCBqhqdrp2+0I1Xfw26+SBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T01:45:13.307831Z"},"content_sha256":"2ad5f88a78987737e9bc09c21461458ac01d7d3a2901a7bc72ca7b4565f1ce46","schema_version":"1.0","event_id":"sha256:2ad5f88a78987737e9bc09c21461458ac01d7d3a2901a7bc72ca7b4565f1ce46"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2005:L5YFUWTLNHKJTVV4SL7VSXIKG3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Element Abundances in Bare Planetary Nebula Central Stars and the Shell Burning in AGB Stars","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"F. Herwig, K. Werner","submitted_at":"2005-12-13T11:53:01Z","abstract_excerpt":"We review the observed properties of extremely hot hydrogen-deficient post-AGB stars of spectral type [WC] and PG1159. Their H-deficiency is probably caused by a (very) late helium-shell flash or a AGB final thermal pulse, laying bare interior stellar regions which are usually kept hidden below the hydrogen envelope. Thus, the photospheric element abundances of these stars allow to draw conclusions about details of nuclear burning and mixing processes in the precursor AGB stars. We summarize the state-of-the-art of stellar evolution models which simulate AGB evolution and the occurrence of a l"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0512320","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0512320/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T17:14:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EboB7+UP7SkiLyECXk65y84ZbDSUp70bT4bAH9jppn3177Did0d8wI0oSislIgkMzPxZAHyCV/KQAQSb82nFDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T01:45:13.308309Z"},"content_sha256":"723ccf230d94bf1e3304831715fc616b72f254613188ef8b832ea77b186e4331","schema_version":"1.0","event_id":"sha256:723ccf230d94bf1e3304831715fc616b72f254613188ef8b832ea77b186e4331"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/L5YFUWTLNHKJTVV4SL7VSXIKG3/bundle.json","state_url":"https://pith.science/pith/L5YFUWTLNHKJTVV4SL7VSXIKG3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/L5YFUWTLNHKJTVV4SL7VSXIKG3/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-07T01:45:13Z","links":{"resolver":"https://pith.science/pith/L5YFUWTLNHKJTVV4SL7VSXIKG3","bundle":"https://pith.science/pith/L5YFUWTLNHKJTVV4SL7VSXIKG3/bundle.json","state":"https://pith.science/pith/L5YFUWTLNHKJTVV4SL7VSXIKG3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/L5YFUWTLNHKJTVV4SL7VSXIKG3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2005:L5YFUWTLNHKJTVV4SL7VSXIKG3","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":"fb8669b8ca1a734bdbde675082885f5250698ad05d0da78ac86552d12da023e7","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2005-12-13T11:53:01Z","title_canon_sha256":"b8ff32555ed3fe9f7d22624695bff8957c9e64a430b65501b9e7faa7e2439372"},"schema_version":"1.0","source":{"id":"astro-ph/0512320","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0512320","created_at":"2026-07-04T17:14:43Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0512320v1","created_at":"2026-07-04T17:14:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0512320","created_at":"2026-07-04T17:14:43Z"},{"alias_kind":"pith_short_12","alias_value":"L5YFUWTLNHKJ","created_at":"2026-07-04T17:14:43Z"},{"alias_kind":"pith_short_16","alias_value":"L5YFUWTLNHKJTVV4","created_at":"2026-07-04T17:14:43Z"},{"alias_kind":"pith_short_8","alias_value":"L5YFUWTL","created_at":"2026-07-04T17:14:43Z"}],"graph_snapshots":[{"event_id":"sha256:723ccf230d94bf1e3304831715fc616b72f254613188ef8b832ea77b186e4331","target":"graph","created_at":"2026-07-04T17:14:43Z","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/0512320/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We review the observed properties of extremely hot hydrogen-deficient post-AGB stars of spectral type [WC] and PG1159. Their H-deficiency is probably caused by a (very) late helium-shell flash or a AGB final thermal pulse, laying bare interior stellar regions which are usually kept hidden below the hydrogen envelope. Thus, the photospheric element abundances of these stars allow to draw conclusions about details of nuclear burning and mixing processes in the precursor AGB stars. We summarize the state-of-the-art of stellar evolution models which simulate AGB evolution and the occurrence of a l","authors_text":"F. Herwig, K. Werner","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2005-12-13T11:53:01Z","title":"The Element Abundances in Bare Planetary Nebula Central Stars and the Shell Burning in AGB Stars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0512320","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":"sha256:2ad5f88a78987737e9bc09c21461458ac01d7d3a2901a7bc72ca7b4565f1ce46","target":"record","created_at":"2026-07-04T17:14:43Z","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":"fb8669b8ca1a734bdbde675082885f5250698ad05d0da78ac86552d12da023e7","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2005-12-13T11:53:01Z","title_canon_sha256":"b8ff32555ed3fe9f7d22624695bff8957c9e64a430b65501b9e7faa7e2439372"},"schema_version":"1.0","source":{"id":"astro-ph/0512320","kind":"arxiv","version":1}},"canonical_sha256":"5f705a5a6b69d499d6bc92ff595d0a36de575be5a77eceaecff900dcd1290023","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5f705a5a6b69d499d6bc92ff595d0a36de575be5a77eceaecff900dcd1290023","first_computed_at":"2026-07-04T17:14:43.464838Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:14:43.464838Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eeGKVDcNb9KJpg+oDOF616bwJZJe0QChjwPstJ8TfihaiWdRr7UL6dBpGfJNlSER2X4AedVVb6dZWwtZie9aAw==","signature_status":"signed_v1","signed_at":"2026-07-04T17:14:43.465212Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0512320","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2ad5f88a78987737e9bc09c21461458ac01d7d3a2901a7bc72ca7b4565f1ce46","sha256:723ccf230d94bf1e3304831715fc616b72f254613188ef8b832ea77b186e4331"],"state_sha256":"33722f8efac4cd5fc9ecc6594d9fe9fc3ec84ce1623b1b1c22bf160e6dfd1e0b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aeDln1Q1CiLDb9zCL5fTUIFGiP0+iwzNROYKOL8WnOTae/F1Mm5zemHx5ZDMuN56YVWCZ8/s+5wkxawzBgiCDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T01:45:13.311865Z","bundle_sha256":"5fcb6e969737dfef29e1afa6af3fadcb527e409dde1f0b44a384ba1f9869bd6b"}}