{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:LDX6LMTNGYG3MR6V55QKRR5BXU","short_pith_number":"pith:LDX6LMTN","canonical_record":{"source":{"id":"1507.08687","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-30T21:03:39Z","cross_cats_sorted":[],"title_canon_sha256":"38f711c21f65bb2228759fd34f203504a711522074f960c54773e55530dd1a5c","abstract_canon_sha256":"b3852496d891dffdd0a6b19bdda0fdeecbf354351383d966214c6a89cf3141c0"},"schema_version":"1.0"},"canonical_sha256":"58efe5b26d360db647d5ef60a8c7a1bd01d550c8ecc41bcecf58616b8f8238a4","source":{"kind":"arxiv","id":"1507.08687","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.08687","created_at":"2026-05-18T01:31:37Z"},{"alias_kind":"arxiv_version","alias_value":"1507.08687v1","created_at":"2026-05-18T01:31:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.08687","created_at":"2026-05-18T01:31:37Z"},{"alias_kind":"pith_short_12","alias_value":"LDX6LMTNGYG3","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_16","alias_value":"LDX6LMTNGYG3MR6V","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_8","alias_value":"LDX6LMTN","created_at":"2026-05-18T12:29:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:LDX6LMTNGYG3MR6V55QKRR5BXU","target":"record","payload":{"canonical_record":{"source":{"id":"1507.08687","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-30T21:03:39Z","cross_cats_sorted":[],"title_canon_sha256":"38f711c21f65bb2228759fd34f203504a711522074f960c54773e55530dd1a5c","abstract_canon_sha256":"b3852496d891dffdd0a6b19bdda0fdeecbf354351383d966214c6a89cf3141c0"},"schema_version":"1.0"},"canonical_sha256":"58efe5b26d360db647d5ef60a8c7a1bd01d550c8ecc41bcecf58616b8f8238a4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:31:37.233917Z","signature_b64":"a40rGqd7/8KhRjvh7/IkDojA07+Ks5RLd/QBtZLcuN9SXJfEAc+F+s+lcNOhKoBghTOV3wgKFhFnP7Hv+Y7OCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"58efe5b26d360db647d5ef60a8c7a1bd01d550c8ecc41bcecf58616b8f8238a4","last_reissued_at":"2026-05-18T01:31:37.233171Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:31:37.233171Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1507.08687","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":"2026-05-18T01:31:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7cj9Af0DgxCLXVns8V7R4jAyMFCdBBH0oe1txS3N2RSgPxozH5rPp89JhkXaCpoxBNqwtYofA8RwAGhxt8pSCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T02:38:33.278263Z"},"content_sha256":"e83f1b285eb0ea913aa6324c082a4c226911b825f208138a30a4f59e0b8311be","schema_version":"1.0","event_id":"sha256:e83f1b285eb0ea913aa6324c082a4c226911b825f208138a30a4f59e0b8311be"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:LDX6LMTNGYG3MR6V55QKRR5BXU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Molecular line formation in the extremely metal-poor star BD+44 493","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Wako Aoki","submitted_at":"2015-07-30T21:03:39Z","abstract_excerpt":"Molecular absorption lines of OH (99 lines) and CH (105 lines) are measured for the carbon-enhanced metal-poor star BD+44 493 with [Fe/H]=-3.8. The abundances of oxygen and carbon determined from individual lines based on an 1D-LTE analysis exhibit significant dependence on excitation potentials of the lines; d log e/d chi ~ -0.15 - -0.2 dex/eV, where e and chi are elemental abundances from individual spectral lines and their excitation potentials, respectively. The dependence is not explained by the uncertainties of stellar parameters, but suggests that the atmosphere of this object possesses"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.08687","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":"2026-05-18T01:31:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oy7+9iriTUbVa/wRYvNsAazAV8XVhy549U1Vdu+5K1gI2aP2WAvHrZnEtM0PrXFrdUgHAhQCwCbOp8vDmzHNDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T02:38:33.278812Z"},"content_sha256":"7b680a67973051adb0d1aa201e2b8fd9a2dbfeeba5dcd692ce6871654c8efc33","schema_version":"1.0","event_id":"sha256:7b680a67973051adb0d1aa201e2b8fd9a2dbfeeba5dcd692ce6871654c8efc33"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LDX6LMTNGYG3MR6V55QKRR5BXU/bundle.json","state_url":"https://pith.science/pith/LDX6LMTNGYG3MR6V55QKRR5BXU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LDX6LMTNGYG3MR6V55QKRR5BXU/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":"2026-06-07T02:38:33Z","links":{"resolver":"https://pith.science/pith/LDX6LMTNGYG3MR6V55QKRR5BXU","bundle":"https://pith.science/pith/LDX6LMTNGYG3MR6V55QKRR5BXU/bundle.json","state":"https://pith.science/pith/LDX6LMTNGYG3MR6V55QKRR5BXU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LDX6LMTNGYG3MR6V55QKRR5BXU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:LDX6LMTNGYG3MR6V55QKRR5BXU","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":"b3852496d891dffdd0a6b19bdda0fdeecbf354351383d966214c6a89cf3141c0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-30T21:03:39Z","title_canon_sha256":"38f711c21f65bb2228759fd34f203504a711522074f960c54773e55530dd1a5c"},"schema_version":"1.0","source":{"id":"1507.08687","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.08687","created_at":"2026-05-18T01:31:37Z"},{"alias_kind":"arxiv_version","alias_value":"1507.08687v1","created_at":"2026-05-18T01:31:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.08687","created_at":"2026-05-18T01:31:37Z"},{"alias_kind":"pith_short_12","alias_value":"LDX6LMTNGYG3","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_16","alias_value":"LDX6LMTNGYG3MR6V","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_8","alias_value":"LDX6LMTN","created_at":"2026-05-18T12:29:29Z"}],"graph_snapshots":[{"event_id":"sha256:7b680a67973051adb0d1aa201e2b8fd9a2dbfeeba5dcd692ce6871654c8efc33","target":"graph","created_at":"2026-05-18T01:31:37Z","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":"Molecular absorption lines of OH (99 lines) and CH (105 lines) are measured for the carbon-enhanced metal-poor star BD+44 493 with [Fe/H]=-3.8. The abundances of oxygen and carbon determined from individual lines based on an 1D-LTE analysis exhibit significant dependence on excitation potentials of the lines; d log e/d chi ~ -0.15 - -0.2 dex/eV, where e and chi are elemental abundances from individual spectral lines and their excitation potentials, respectively. The dependence is not explained by the uncertainties of stellar parameters, but suggests that the atmosphere of this object possesses","authors_text":"Wako Aoki","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-30T21:03:39Z","title":"Molecular line formation in the extremely metal-poor star BD+44 493"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.08687","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:e83f1b285eb0ea913aa6324c082a4c226911b825f208138a30a4f59e0b8311be","target":"record","created_at":"2026-05-18T01:31:37Z","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":"b3852496d891dffdd0a6b19bdda0fdeecbf354351383d966214c6a89cf3141c0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-30T21:03:39Z","title_canon_sha256":"38f711c21f65bb2228759fd34f203504a711522074f960c54773e55530dd1a5c"},"schema_version":"1.0","source":{"id":"1507.08687","kind":"arxiv","version":1}},"canonical_sha256":"58efe5b26d360db647d5ef60a8c7a1bd01d550c8ecc41bcecf58616b8f8238a4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"58efe5b26d360db647d5ef60a8c7a1bd01d550c8ecc41bcecf58616b8f8238a4","first_computed_at":"2026-05-18T01:31:37.233171Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:31:37.233171Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"a40rGqd7/8KhRjvh7/IkDojA07+Ks5RLd/QBtZLcuN9SXJfEAc+F+s+lcNOhKoBghTOV3wgKFhFnP7Hv+Y7OCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:31:37.233917Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.08687","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e83f1b285eb0ea913aa6324c082a4c226911b825f208138a30a4f59e0b8311be","sha256:7b680a67973051adb0d1aa201e2b8fd9a2dbfeeba5dcd692ce6871654c8efc33"],"state_sha256":"2e929527238e82d655519450a0cf29ce3312bcf5879bb7bc55ec1f9376922515"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"N3A5VlSERX/sttla47E0WlWJ0VNefxmBDCDCq8e8KXDpp7ExEJ5DkNJ090YZuFbq/TfqYoYBQU7H5pyhdNVTCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T02:38:33.281558Z","bundle_sha256":"d8708e70e230573bbe2203e55bceef9e0590cf01137b601622eaa18c368532c7"}}