{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:6W4GHIRQYX5L7WEGRASKBYIRN3","short_pith_number":"pith:6W4GHIRQ","canonical_record":{"source":{"id":"1603.04988","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-03-16T08:21:40Z","cross_cats_sorted":[],"title_canon_sha256":"9acbf2f610952502112c1809b57ca99ea8a8d477a08c0af963bafddf1c845fa4","abstract_canon_sha256":"241e17b44fed276b91146775e68ab6d6604a0261864443c5ca97216dc77a595f"},"schema_version":"1.0"},"canonical_sha256":"f5b863a230c5fabfd8868824a0e1116ec49070a008679b547ed6c91e9b9f7850","source":{"kind":"arxiv","id":"1603.04988","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.04988","created_at":"2026-05-18T01:12:16Z"},{"alias_kind":"arxiv_version","alias_value":"1603.04988v1","created_at":"2026-05-18T01:12:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.04988","created_at":"2026-05-18T01:12:16Z"},{"alias_kind":"pith_short_12","alias_value":"6W4GHIRQYX5L","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_16","alias_value":"6W4GHIRQYX5L7WEG","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_8","alias_value":"6W4GHIRQ","created_at":"2026-05-18T12:30:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:6W4GHIRQYX5L7WEGRASKBYIRN3","target":"record","payload":{"canonical_record":{"source":{"id":"1603.04988","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-03-16T08:21:40Z","cross_cats_sorted":[],"title_canon_sha256":"9acbf2f610952502112c1809b57ca99ea8a8d477a08c0af963bafddf1c845fa4","abstract_canon_sha256":"241e17b44fed276b91146775e68ab6d6604a0261864443c5ca97216dc77a595f"},"schema_version":"1.0"},"canonical_sha256":"f5b863a230c5fabfd8868824a0e1116ec49070a008679b547ed6c91e9b9f7850","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:12:16.694474Z","signature_b64":"XXd9Mvat6U7LB1RDAdZQkL2mZ+i2QBa98QO7MhuqoyrPDgR1ufOC3F1RyOsmeJvjn3Dn47RVSNKCINYL66q/Aw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f5b863a230c5fabfd8868824a0e1116ec49070a008679b547ed6c91e9b9f7850","last_reissued_at":"2026-05-18T01:12:16.694131Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:12:16.694131Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1603.04988","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":"2026-05-18T01:12:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cqYJOTVNByC4fAP8T89RmETAavkBcfJ729eDj3exf8JglZbfCxQjOa/Dmvi2CsinArTd5Ew3HKIesqk2VIxZAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T22:34:54.039308Z"},"content_sha256":"6179b0d5f2d216312fd420778e0cb3b59edd0317dd50ee62aba658629ff3b74e","schema_version":"1.0","event_id":"sha256:6179b0d5f2d216312fd420778e0cb3b59edd0317dd50ee62aba658629ff3b74e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:6W4GHIRQYX5L7WEGRASKBYIRN3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Observational evidence for the evolution of nuclear metallicity and star formation rate as the merger stage","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Cai-Na Hao, Peng Wei, Rui Guo, Xiao-Yang Xia, Xin Guo","submitted_at":"2016-03-16T08:21:40Z","abstract_excerpt":"We investigate the evolution of nuclear gas-phase oxygen abundance and star formation rate (SFR) of local far-infrared selected star-forming galaxies along the merger sequence, as traced by their optical morphologies. The sample was drawn from a cross-correlation analysis of the IRAS Point Source Catalog Redshift Survey and 1 Jy ultraluminous infrared galaxies sample with the Sloan Digital Sky Survey Data Release 7 database. The investigation is done by comparing our sample to a control sample matched in the normalized redshift distribution in two diagnostics, which are the nuclear gas-phase m"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.04988","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":"2026-05-18T01:12:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PjkD0ULb87Si8wuYfQSioIV35WSsHYcaGW6NGzaxnCTW0eyREN0PA3OSISvZGvuctms8rlHWTmLcl9fDfzykCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T22:34:54.039966Z"},"content_sha256":"406b9afc104453c09b2840f0a6cb1a62214813da778d0f47eec41951956c78af","schema_version":"1.0","event_id":"sha256:406b9afc104453c09b2840f0a6cb1a62214813da778d0f47eec41951956c78af"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6W4GHIRQYX5L7WEGRASKBYIRN3/bundle.json","state_url":"https://pith.science/pith/6W4GHIRQYX5L7WEGRASKBYIRN3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6W4GHIRQYX5L7WEGRASKBYIRN3/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":"2026-05-30T22:34:54Z","links":{"resolver":"https://pith.science/pith/6W4GHIRQYX5L7WEGRASKBYIRN3","bundle":"https://pith.science/pith/6W4GHIRQYX5L7WEGRASKBYIRN3/bundle.json","state":"https://pith.science/pith/6W4GHIRQYX5L7WEGRASKBYIRN3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6W4GHIRQYX5L7WEGRASKBYIRN3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:6W4GHIRQYX5L7WEGRASKBYIRN3","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":"241e17b44fed276b91146775e68ab6d6604a0261864443c5ca97216dc77a595f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-03-16T08:21:40Z","title_canon_sha256":"9acbf2f610952502112c1809b57ca99ea8a8d477a08c0af963bafddf1c845fa4"},"schema_version":"1.0","source":{"id":"1603.04988","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.04988","created_at":"2026-05-18T01:12:16Z"},{"alias_kind":"arxiv_version","alias_value":"1603.04988v1","created_at":"2026-05-18T01:12:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.04988","created_at":"2026-05-18T01:12:16Z"},{"alias_kind":"pith_short_12","alias_value":"6W4GHIRQYX5L","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_16","alias_value":"6W4GHIRQYX5L7WEG","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_8","alias_value":"6W4GHIRQ","created_at":"2026-05-18T12:30:04Z"}],"graph_snapshots":[{"event_id":"sha256:406b9afc104453c09b2840f0a6cb1a62214813da778d0f47eec41951956c78af","target":"graph","created_at":"2026-05-18T01:12:16Z","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 investigate the evolution of nuclear gas-phase oxygen abundance and star formation rate (SFR) of local far-infrared selected star-forming galaxies along the merger sequence, as traced by their optical morphologies. The sample was drawn from a cross-correlation analysis of the IRAS Point Source Catalog Redshift Survey and 1 Jy ultraluminous infrared galaxies sample with the Sloan Digital Sky Survey Data Release 7 database. The investigation is done by comparing our sample to a control sample matched in the normalized redshift distribution in two diagnostics, which are the nuclear gas-phase m","authors_text":"Cai-Na Hao, Peng Wei, Rui Guo, Xiao-Yang Xia, Xin Guo","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-03-16T08:21:40Z","title":"Observational evidence for the evolution of nuclear metallicity and star formation rate as the merger stage"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.04988","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":"sha256:6179b0d5f2d216312fd420778e0cb3b59edd0317dd50ee62aba658629ff3b74e","target":"record","created_at":"2026-05-18T01:12:16Z","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":"241e17b44fed276b91146775e68ab6d6604a0261864443c5ca97216dc77a595f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-03-16T08:21:40Z","title_canon_sha256":"9acbf2f610952502112c1809b57ca99ea8a8d477a08c0af963bafddf1c845fa4"},"schema_version":"1.0","source":{"id":"1603.04988","kind":"arxiv","version":1}},"canonical_sha256":"f5b863a230c5fabfd8868824a0e1116ec49070a008679b547ed6c91e9b9f7850","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f5b863a230c5fabfd8868824a0e1116ec49070a008679b547ed6c91e9b9f7850","first_computed_at":"2026-05-18T01:12:16.694131Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:12:16.694131Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XXd9Mvat6U7LB1RDAdZQkL2mZ+i2QBa98QO7MhuqoyrPDgR1ufOC3F1RyOsmeJvjn3Dn47RVSNKCINYL66q/Aw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:12:16.694474Z","signed_message":"canonical_sha256_bytes"},"source_id":"1603.04988","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6179b0d5f2d216312fd420778e0cb3b59edd0317dd50ee62aba658629ff3b74e","sha256:406b9afc104453c09b2840f0a6cb1a62214813da778d0f47eec41951956c78af"],"state_sha256":"0e16e731bc2bf44b922a05684bd8bd90b2b20fcb129c970908d46ab6f71cac22"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xlqRB0EQfO9meV/bzrVViaX4rIPXrsDxJ5IxaF8Y4mKyLRpglSBwQF3/hWY3VG2mGyqdMdDm/k/ZEae3zy8XAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T22:34:54.042997Z","bundle_sha256":"8f08816af60ae784343a863cabab4e412d8829974f34696ae7482145542c416f"}}