{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2001:ACOQKRC7SGSCGY3C2R5FCBMCQT","short_pith_number":"pith:ACOQKRC7","canonical_record":{"source":{"id":"astro-ph/0101032","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2001-01-03T10:47:02Z","cross_cats_sorted":[],"title_canon_sha256":"153936c8569290dbe82dcffc318cc2303bb33ceb3dc51900e265b49a2acd2c6a","abstract_canon_sha256":"ba445b4c2605628e1dac769e6399a8b369d47195cf4430fcca060ee64540ea40"},"schema_version":"1.0"},"canonical_sha256":"009d05445f91a4236362d47a51058284c878707e81bdce62e46eecfdb88d168b","source":{"kind":"arxiv","id":"astro-ph/0101032","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0101032","created_at":"2026-05-18T04:29:05Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0101032v1","created_at":"2026-05-18T04:29:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0101032","created_at":"2026-05-18T04:29:05Z"},{"alias_kind":"pith_short_12","alias_value":"ACOQKRC7SGSC","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"ACOQKRC7SGSCGY3C","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"ACOQKRC7","created_at":"2026-05-18T12:25:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2001:ACOQKRC7SGSCGY3C2R5FCBMCQT","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0101032","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2001-01-03T10:47:02Z","cross_cats_sorted":[],"title_canon_sha256":"153936c8569290dbe82dcffc318cc2303bb33ceb3dc51900e265b49a2acd2c6a","abstract_canon_sha256":"ba445b4c2605628e1dac769e6399a8b369d47195cf4430fcca060ee64540ea40"},"schema_version":"1.0"},"canonical_sha256":"009d05445f91a4236362d47a51058284c878707e81bdce62e46eecfdb88d168b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:29:05.267021Z","signature_b64":"NkIlUyRU2Aix6HrNCt+w4SEImr8zlZJwEai+Vp8EeU14i0o3eBcGLT4vqIdgsNH2xAQoVjdSxscdpVvJgciYBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"009d05445f91a4236362d47a51058284c878707e81bdce62e46eecfdb88d168b","last_reissued_at":"2026-05-18T04:29:05.266391Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:29:05.266391Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0101032","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":"2026-05-18T04:29:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JdrWDdXsA9sc0+vkLWuO4sj4x29ByTeUMxaHu6KZgMKiR1UGRcATJx4EYYefBWeZegxM8XgcUHDZ/LFHYXf6Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T05:14:59.186262Z"},"content_sha256":"3cbfd58ab7255af04f4aa183a0615d68027342709257b9945cc9d5c49f1c6779","schema_version":"1.0","event_id":"sha256:3cbfd58ab7255af04f4aa183a0615d68027342709257b9945cc9d5c49f1c6779"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2001:ACOQKRC7SGSCGY3C2R5FCBMCQT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Oxygen in the Very Early Galaxy","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"G. Basri (UC Berkeley), G.Israelian (IAC), N. Shchukina (Kiev Obs.), P. Bonifacio (Trieste Obs.), P. Molaro (Trieste Obs.), R. Garcia Lopez (IAC), R. Rebolo (IAC)","submitted_at":"2001-01-03T10:47:02Z","abstract_excerpt":"Oxygen abundances in a sample of ultra-metal-poor subdwarfs have been derived from measurements of the oxygen triplet at 7771--5 A and OH lines in the near UV performed in high-resolution and high signal-to-noise spectra obtained with WHT/UES, KeckI/HIRES, and VLT/UVES. Our Fe abundances were derived in LTE and then corrected for NLTE effects following Thevenin and Idiart (1999). The new oxygen abundances confirm previous findings for a progressive linear rise in the oxygen-to-iron ratio with a slope -0.33+-0.02 from solar metallicity to [Fe/H] -3. A slightly higher slope would be obtained if "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0101032","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":"2026-05-18T04:29:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cLlU45OBSvvwTa3Oy4tfP7CLciS+PdloNFrW8S0YRpn2F+yKQr6MjRgjupQXHiQUHxndBQFK8CONYEhPaN/fDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T05:14:59.186679Z"},"content_sha256":"577084191bf2a468ee6b93b9127379e3be795fe1f7478ab4226c67d20f99c632","schema_version":"1.0","event_id":"sha256:577084191bf2a468ee6b93b9127379e3be795fe1f7478ab4226c67d20f99c632"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ACOQKRC7SGSCGY3C2R5FCBMCQT/bundle.json","state_url":"https://pith.science/pith/ACOQKRC7SGSCGY3C2R5FCBMCQT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ACOQKRC7SGSCGY3C2R5FCBMCQT/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":"2026-06-07T05:14:59Z","links":{"resolver":"https://pith.science/pith/ACOQKRC7SGSCGY3C2R5FCBMCQT","bundle":"https://pith.science/pith/ACOQKRC7SGSCGY3C2R5FCBMCQT/bundle.json","state":"https://pith.science/pith/ACOQKRC7SGSCGY3C2R5FCBMCQT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ACOQKRC7SGSCGY3C2R5FCBMCQT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2001:ACOQKRC7SGSCGY3C2R5FCBMCQT","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":"ba445b4c2605628e1dac769e6399a8b369d47195cf4430fcca060ee64540ea40","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2001-01-03T10:47:02Z","title_canon_sha256":"153936c8569290dbe82dcffc318cc2303bb33ceb3dc51900e265b49a2acd2c6a"},"schema_version":"1.0","source":{"id":"astro-ph/0101032","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0101032","created_at":"2026-05-18T04:29:05Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0101032v1","created_at":"2026-05-18T04:29:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0101032","created_at":"2026-05-18T04:29:05Z"},{"alias_kind":"pith_short_12","alias_value":"ACOQKRC7SGSC","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"ACOQKRC7SGSCGY3C","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"ACOQKRC7","created_at":"2026-05-18T12:25:50Z"}],"graph_snapshots":[{"event_id":"sha256:577084191bf2a468ee6b93b9127379e3be795fe1f7478ab4226c67d20f99c632","target":"graph","created_at":"2026-05-18T04:29:05Z","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":"Oxygen abundances in a sample of ultra-metal-poor subdwarfs have been derived from measurements of the oxygen triplet at 7771--5 A and OH lines in the near UV performed in high-resolution and high signal-to-noise spectra obtained with WHT/UES, KeckI/HIRES, and VLT/UVES. Our Fe abundances were derived in LTE and then corrected for NLTE effects following Thevenin and Idiart (1999). The new oxygen abundances confirm previous findings for a progressive linear rise in the oxygen-to-iron ratio with a slope -0.33+-0.02 from solar metallicity to [Fe/H] -3. A slightly higher slope would be obtained if ","authors_text":"G. Basri (UC Berkeley), G.Israelian (IAC), N. Shchukina (Kiev Obs.), P. Bonifacio (Trieste Obs.), P. Molaro (Trieste Obs.), R. Garcia Lopez (IAC), R. Rebolo (IAC)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2001-01-03T10:47:02Z","title":"Oxygen in the Very Early Galaxy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0101032","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":"sha256:3cbfd58ab7255af04f4aa183a0615d68027342709257b9945cc9d5c49f1c6779","target":"record","created_at":"2026-05-18T04:29:05Z","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":"ba445b4c2605628e1dac769e6399a8b369d47195cf4430fcca060ee64540ea40","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2001-01-03T10:47:02Z","title_canon_sha256":"153936c8569290dbe82dcffc318cc2303bb33ceb3dc51900e265b49a2acd2c6a"},"schema_version":"1.0","source":{"id":"astro-ph/0101032","kind":"arxiv","version":1}},"canonical_sha256":"009d05445f91a4236362d47a51058284c878707e81bdce62e46eecfdb88d168b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"009d05445f91a4236362d47a51058284c878707e81bdce62e46eecfdb88d168b","first_computed_at":"2026-05-18T04:29:05.266391Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:29:05.266391Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NkIlUyRU2Aix6HrNCt+w4SEImr8zlZJwEai+Vp8EeU14i0o3eBcGLT4vqIdgsNH2xAQoVjdSxscdpVvJgciYBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:29:05.267021Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0101032","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3cbfd58ab7255af04f4aa183a0615d68027342709257b9945cc9d5c49f1c6779","sha256:577084191bf2a468ee6b93b9127379e3be795fe1f7478ab4226c67d20f99c632"],"state_sha256":"7f250a114fb0626e00c02631d03ea88663aea354edf1e79841137c1ceb477301"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ROJ5eGoGmOSu5ilJF107edgwYapkcsE+Xso5r+MFzU6dGKs6RtzOFyMejcklUxazk9zJz1+TVbwkQrMhFwQfBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T05:14:59.188735Z","bundle_sha256":"c2e32232a80b569a904628d37df4dfd9af83abd99662fad07d78c2e04c32c40c"}}