{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2006:X3XZVW5FJ4QC7DDXDF6VLEUTYN","short_pith_number":"pith:X3XZVW5F","canonical_record":{"source":{"id":"astro-ph/0607074","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-07-05T14:28:59Z","cross_cats_sorted":[],"title_canon_sha256":"f49fcad61e7cf434f1c41a84b9ba7f504522ba6e4933bb857c031f0098b97ccc","abstract_canon_sha256":"7fc0b23417466942e932f07ec15412d88da62c787b399686b8de3b3b688c49e1"},"schema_version":"1.0"},"canonical_sha256":"beef9adba54f202f8c77197d559293c3620d731eadeae8c0926233feb0f81982","source":{"kind":"arxiv","id":"astro-ph/0607074","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0607074","created_at":"2026-05-18T04:28:58Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0607074v1","created_at":"2026-05-18T04:28:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0607074","created_at":"2026-05-18T04:28:58Z"},{"alias_kind":"pith_short_12","alias_value":"X3XZVW5FJ4QC","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_16","alias_value":"X3XZVW5FJ4QC7DDX","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_8","alias_value":"X3XZVW5F","created_at":"2026-05-18T12:25:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2006:X3XZVW5FJ4QC7DDXDF6VLEUTYN","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0607074","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-07-05T14:28:59Z","cross_cats_sorted":[],"title_canon_sha256":"f49fcad61e7cf434f1c41a84b9ba7f504522ba6e4933bb857c031f0098b97ccc","abstract_canon_sha256":"7fc0b23417466942e932f07ec15412d88da62c787b399686b8de3b3b688c49e1"},"schema_version":"1.0"},"canonical_sha256":"beef9adba54f202f8c77197d559293c3620d731eadeae8c0926233feb0f81982","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:28:58.509182Z","signature_b64":"Dn7MYKwdMNY/AB0wMTYyM/T2QgywdD3qTq+DtRg1lDakAf05ByVPlQ7RvSRtQ5/MAqaDIPkfOLmgEh2iXAJ6Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"beef9adba54f202f8c77197d559293c3620d731eadeae8c0926233feb0f81982","last_reissued_at":"2026-05-18T04:28:58.508589Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:28:58.508589Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0607074","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":"2026-05-18T04:28:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5sa/g03Icijq+1oXtVC6ua+TNwpFMHnjEEpxgqO1e6tHD22ap51a7XY/8WhG3I3+b7B9qNKEOOFIzt8hKKW3Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T16:37:37.730661Z"},"content_sha256":"3e48fff766d524c67aed25943a32817490ba978830db90f3b544eae2375059b5","schema_version":"1.0","event_id":"sha256:3e48fff766d524c67aed25943a32817490ba978830db90f3b544eae2375059b5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2006:X3XZVW5FJ4QC7DDXDF6VLEUTYN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The oxygen abundance calibrations and N/O abundance ratios of ~40,000 SDSS star-forming galaxies","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"3), 3) ((1) NAOC, B. Zhang (1, China), China; (2) GEPI, F. Hammer (2), France; (3) Department of Physics, Hebei Normal University, H. Flores (2), L. C. Deng (1), Observatoire de Paris-Meudon, S. Y. Yin (1, Y. C. Liang (1)","submitted_at":"2006-07-05T14:28:59Z","abstract_excerpt":"Using a large sample of 38,478 star-forming galaxies selected from the Second Data Release of the Sloan Digital Sky Survey database (SDSS-DR2), we derive analytical calibrations for oxygen abundances from several metallicity-sensitive emission-line ratios: [N II]/H_alpha, [O III]/[N II], [N II]/[O II], [N II]/[S II], [S II]/H_alpha, and [O III]/H_beta. This consistent set of strong-line oxygen abundance calibrations will be useful for future abundance studies. Among these calibrations, [N II]/[O II] is the best for metal-rich galaxies due to its independence on ionization parameter and low sca"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0607074","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":"2026-05-18T04:28:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VNdhjNdmMakhti4N+auWm6o16+vdojQMIFo92AhUszlQcINYSnX11NbbyzGCBNGxlUNLR29rBj4ULTmjUzv0Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T16:37:37.731300Z"},"content_sha256":"f3fdb346bfa506b6ae8e61a4e79927e13bdbdf7b809e1beb5d256b245bcb2bad","schema_version":"1.0","event_id":"sha256:f3fdb346bfa506b6ae8e61a4e79927e13bdbdf7b809e1beb5d256b245bcb2bad"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/X3XZVW5FJ4QC7DDXDF6VLEUTYN/bundle.json","state_url":"https://pith.science/pith/X3XZVW5FJ4QC7DDXDF6VLEUTYN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/X3XZVW5FJ4QC7DDXDF6VLEUTYN/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":"2026-05-26T16:37:37Z","links":{"resolver":"https://pith.science/pith/X3XZVW5FJ4QC7DDXDF6VLEUTYN","bundle":"https://pith.science/pith/X3XZVW5FJ4QC7DDXDF6VLEUTYN/bundle.json","state":"https://pith.science/pith/X3XZVW5FJ4QC7DDXDF6VLEUTYN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/X3XZVW5FJ4QC7DDXDF6VLEUTYN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2006:X3XZVW5FJ4QC7DDXDF6VLEUTYN","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":"7fc0b23417466942e932f07ec15412d88da62c787b399686b8de3b3b688c49e1","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-07-05T14:28:59Z","title_canon_sha256":"f49fcad61e7cf434f1c41a84b9ba7f504522ba6e4933bb857c031f0098b97ccc"},"schema_version":"1.0","source":{"id":"astro-ph/0607074","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0607074","created_at":"2026-05-18T04:28:58Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0607074v1","created_at":"2026-05-18T04:28:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0607074","created_at":"2026-05-18T04:28:58Z"},{"alias_kind":"pith_short_12","alias_value":"X3XZVW5FJ4QC","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_16","alias_value":"X3XZVW5FJ4QC7DDX","created_at":"2026-05-18T12:25:54Z"},{"alias_kind":"pith_short_8","alias_value":"X3XZVW5F","created_at":"2026-05-18T12:25:54Z"}],"graph_snapshots":[{"event_id":"sha256:f3fdb346bfa506b6ae8e61a4e79927e13bdbdf7b809e1beb5d256b245bcb2bad","target":"graph","created_at":"2026-05-18T04:28:58Z","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":"Using a large sample of 38,478 star-forming galaxies selected from the Second Data Release of the Sloan Digital Sky Survey database (SDSS-DR2), we derive analytical calibrations for oxygen abundances from several metallicity-sensitive emission-line ratios: [N II]/H_alpha, [O III]/[N II], [N II]/[O II], [N II]/[S II], [S II]/H_alpha, and [O III]/H_beta. This consistent set of strong-line oxygen abundance calibrations will be useful for future abundance studies. Among these calibrations, [N II]/[O II] is the best for metal-rich galaxies due to its independence on ionization parameter and low sca","authors_text":"3), 3) ((1) NAOC, B. Zhang (1, China), China; (2) GEPI, F. Hammer (2), France; (3) Department of Physics, Hebei Normal University, H. Flores (2), L. C. Deng (1), Observatoire de Paris-Meudon, S. Y. Yin (1, Y. C. Liang (1)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2006-07-05T14:28:59Z","title":"The oxygen abundance calibrations and N/O abundance ratios of ~40,000 SDSS star-forming galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0607074","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":"sha256:3e48fff766d524c67aed25943a32817490ba978830db90f3b544eae2375059b5","target":"record","created_at":"2026-05-18T04:28:58Z","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":"7fc0b23417466942e932f07ec15412d88da62c787b399686b8de3b3b688c49e1","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-07-05T14:28:59Z","title_canon_sha256":"f49fcad61e7cf434f1c41a84b9ba7f504522ba6e4933bb857c031f0098b97ccc"},"schema_version":"1.0","source":{"id":"astro-ph/0607074","kind":"arxiv","version":1}},"canonical_sha256":"beef9adba54f202f8c77197d559293c3620d731eadeae8c0926233feb0f81982","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"beef9adba54f202f8c77197d559293c3620d731eadeae8c0926233feb0f81982","first_computed_at":"2026-05-18T04:28:58.508589Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:28:58.508589Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Dn7MYKwdMNY/AB0wMTYyM/T2QgywdD3qTq+DtRg1lDakAf05ByVPlQ7RvSRtQ5/MAqaDIPkfOLmgEh2iXAJ6Ag==","signature_status":"signed_v1","signed_at":"2026-05-18T04:28:58.509182Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0607074","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3e48fff766d524c67aed25943a32817490ba978830db90f3b544eae2375059b5","sha256:f3fdb346bfa506b6ae8e61a4e79927e13bdbdf7b809e1beb5d256b245bcb2bad"],"state_sha256":"2550916079e899e2a9c47f9ecaedbc738d77ac14a908ae96d5dc907c8268fadd"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dEBEpi/hWyYuWvktUolVEkbCUntQJYPqrsoi5AM7QYCpi02VeMnjvmc2CBvj2CnwB9bg6LHNDxDyKTAI4H+kAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T16:37:37.735117Z","bundle_sha256":"e76ffe213fffdf60e71f8d70fd1975259d1e4d62f72db7547cbf324b9a8578e4"}}