{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:5AXL5CQA62AR3AOZCX2EMV7AWA","short_pith_number":"pith:5AXL5CQA","canonical_record":{"source":{"id":"0812.5044","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-12-30T09:56:05Z","cross_cats_sorted":[],"title_canon_sha256":"3128021a7faa0bff7984d9e8da647ad15abb86b6dd5668833a7fe9ad7b382ce3","abstract_canon_sha256":"602c6887b07910acd816b17adba5db6515145fe47b8089a803062a452c0f607c"},"schema_version":"1.0"},"canonical_sha256":"e82ebe8a00f6811d81d915f44657e0b025d3aee7cd851cbb8b988afe1591209b","source":{"kind":"arxiv","id":"0812.5044","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0812.5044","created_at":"2026-05-18T02:15:03Z"},{"alias_kind":"arxiv_version","alias_value":"0812.5044v1","created_at":"2026-05-18T02:15:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0812.5044","created_at":"2026-05-18T02:15:03Z"},{"alias_kind":"pith_short_12","alias_value":"5AXL5CQA62AR","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_16","alias_value":"5AXL5CQA62AR3AOZ","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_8","alias_value":"5AXL5CQA","created_at":"2026-05-18T12:25:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:5AXL5CQA62AR3AOZCX2EMV7AWA","target":"record","payload":{"canonical_record":{"source":{"id":"0812.5044","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-12-30T09:56:05Z","cross_cats_sorted":[],"title_canon_sha256":"3128021a7faa0bff7984d9e8da647ad15abb86b6dd5668833a7fe9ad7b382ce3","abstract_canon_sha256":"602c6887b07910acd816b17adba5db6515145fe47b8089a803062a452c0f607c"},"schema_version":"1.0"},"canonical_sha256":"e82ebe8a00f6811d81d915f44657e0b025d3aee7cd851cbb8b988afe1591209b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:15:03.651650Z","signature_b64":"Z2byEDh6YV9UjECYGtRyBe7Ev4sBwN8ebm9AykIrGND1XxUbFuNPBddLU2EdeR/EJc0J1sgEnFNkNo1PMUUtCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e82ebe8a00f6811d81d915f44657e0b025d3aee7cd851cbb8b988afe1591209b","last_reissued_at":"2026-05-18T02:15:03.651286Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:15:03.651286Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0812.5044","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":"2026-05-18T02:15:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8hksh+eneJQ+Acq4j/h7pYT8iQgqH/TMaLfCn/yLiJRyz8SsEsUsoOhM0/xGkrJagwf6Jm1IM0rmVY9Hv2HsBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-22T21:34:29.062262Z"},"content_sha256":"8e384646e0b0bf0cfefe7f08b56764ca0e0def2e285b6ad8d5b18b864ff8091f","schema_version":"1.0","event_id":"sha256:8e384646e0b0bf0cfefe7f08b56764ca0e0def2e285b6ad8d5b18b864ff8091f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:5AXL5CQA62AR3AOZCX2EMV7AWA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Further progress on solar age calibration","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Douglas Gough, G\\\"unter Houdek","submitted_at":"2008-12-30T09:56:05Z","abstract_excerpt":"We recalibrate a standard solar model seismologically to estimate the main-sequence age of the Sun. Our procedure differs from what we have done in the past by removing from the observed frequencies the effect of hydrogen ionization and the superadiabatic convective boundary layer. Our preliminary result is $t_\\odot=4.63 \\pm 0.02$ Gy."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0812.5044","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":""},"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":"2026-05-18T02:15:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UU3dZenEfN2//YOm+mS2ZfjERu+IFmqeCfqc9LaGHUmV0TBuNps30g/aPPOP/T8kx4jasUxpse1vCO1wVSKzDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-22T21:34:29.062629Z"},"content_sha256":"a19b39adfc58126e0666d65ed894502ab450e2a26dfa3ca5efa9f7552be8f4f2","schema_version":"1.0","event_id":"sha256:a19b39adfc58126e0666d65ed894502ab450e2a26dfa3ca5efa9f7552be8f4f2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5AXL5CQA62AR3AOZCX2EMV7AWA/bundle.json","state_url":"https://pith.science/pith/5AXL5CQA62AR3AOZCX2EMV7AWA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5AXL5CQA62AR3AOZCX2EMV7AWA/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":"2026-06-22T21:34:29Z","links":{"resolver":"https://pith.science/pith/5AXL5CQA62AR3AOZCX2EMV7AWA","bundle":"https://pith.science/pith/5AXL5CQA62AR3AOZCX2EMV7AWA/bundle.json","state":"https://pith.science/pith/5AXL5CQA62AR3AOZCX2EMV7AWA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5AXL5CQA62AR3AOZCX2EMV7AWA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:5AXL5CQA62AR3AOZCX2EMV7AWA","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":"602c6887b07910acd816b17adba5db6515145fe47b8089a803062a452c0f607c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-12-30T09:56:05Z","title_canon_sha256":"3128021a7faa0bff7984d9e8da647ad15abb86b6dd5668833a7fe9ad7b382ce3"},"schema_version":"1.0","source":{"id":"0812.5044","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0812.5044","created_at":"2026-05-18T02:15:03Z"},{"alias_kind":"arxiv_version","alias_value":"0812.5044v1","created_at":"2026-05-18T02:15:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0812.5044","created_at":"2026-05-18T02:15:03Z"},{"alias_kind":"pith_short_12","alias_value":"5AXL5CQA62AR","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_16","alias_value":"5AXL5CQA62AR3AOZ","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_8","alias_value":"5AXL5CQA","created_at":"2026-05-18T12:25:56Z"}],"graph_snapshots":[{"event_id":"sha256:a19b39adfc58126e0666d65ed894502ab450e2a26dfa3ca5efa9f7552be8f4f2","target":"graph","created_at":"2026-05-18T02:15:03Z","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 recalibrate a standard solar model seismologically to estimate the main-sequence age of the Sun. Our procedure differs from what we have done in the past by removing from the observed frequencies the effect of hydrogen ionization and the superadiabatic convective boundary layer. Our preliminary result is $t_\\odot=4.63 \\pm 0.02$ Gy.","authors_text":"Douglas Gough, G\\\"unter Houdek","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-12-30T09:56:05Z","title":"Further progress on solar age calibration"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0812.5044","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":"sha256:8e384646e0b0bf0cfefe7f08b56764ca0e0def2e285b6ad8d5b18b864ff8091f","target":"record","created_at":"2026-05-18T02:15:03Z","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":"602c6887b07910acd816b17adba5db6515145fe47b8089a803062a452c0f607c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-12-30T09:56:05Z","title_canon_sha256":"3128021a7faa0bff7984d9e8da647ad15abb86b6dd5668833a7fe9ad7b382ce3"},"schema_version":"1.0","source":{"id":"0812.5044","kind":"arxiv","version":1}},"canonical_sha256":"e82ebe8a00f6811d81d915f44657e0b025d3aee7cd851cbb8b988afe1591209b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e82ebe8a00f6811d81d915f44657e0b025d3aee7cd851cbb8b988afe1591209b","first_computed_at":"2026-05-18T02:15:03.651286Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:15:03.651286Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Z2byEDh6YV9UjECYGtRyBe7Ev4sBwN8ebm9AykIrGND1XxUbFuNPBddLU2EdeR/EJc0J1sgEnFNkNo1PMUUtCA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:15:03.651650Z","signed_message":"canonical_sha256_bytes"},"source_id":"0812.5044","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8e384646e0b0bf0cfefe7f08b56764ca0e0def2e285b6ad8d5b18b864ff8091f","sha256:a19b39adfc58126e0666d65ed894502ab450e2a26dfa3ca5efa9f7552be8f4f2"],"state_sha256":"8e0de25770d130db3bf183f65d70b74920db454b903720683cdcb4273f846ab4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"boiUJSAtPI1izumu1mLzto3HceK8+Ixdqow2PkKaQ2g+z2vK8UANHLsiq+6EkzqR9eRJ+bqZYcFFgOFKkPQRCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-22T21:34:29.064571Z","bundle_sha256":"300ad899907b1e439663a9ea6686e8b807e83de5f3929ad84157ddb8f7c22bad"}}