{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:F73DAGHWL7TAZXGI24C3OSIDT3","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":"c11ef5391bbd6a6a6ef15175cbaea20d119d4b40a27b7910610f6998fcad3bf3","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-03-29T16:19:57Z","title_canon_sha256":"ad6798d1b16ea05ec8afff28d5e12b892fe7ba16d5c7f3a1757109dd60cd2e4b"},"schema_version":"1.0","source":{"id":"0903.5020","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0903.5020","created_at":"2026-05-18T04:17:04Z"},{"alias_kind":"arxiv_version","alias_value":"0903.5020v3","created_at":"2026-05-18T04:17:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0903.5020","created_at":"2026-05-18T04:17:04Z"},{"alias_kind":"pith_short_12","alias_value":"F73DAGHWL7TA","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_16","alias_value":"F73DAGHWL7TAZXGI","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_8","alias_value":"F73DAGHW","created_at":"2026-05-18T12:25:59Z"}],"graph_snapshots":[{"event_id":"sha256:8776d343a61bedde8d449282b65e3d7ecbcaa52deb65ef811b3cc4e50d734ebc","target":"graph","created_at":"2026-05-18T04:17:04Z","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 used a large, homogeneous sample of 4178 z <= 0.8 Seyfert 1 galaxies and QSOs selected from the Sloan Digital Sky Survey to investigate the strength of Fe II emission and its correlation with other emission lines and physical parameters of active galactic nuclei. We find that the strongest correlations of almost all the emission-line intensity ratios and equivalent widths (EWs) are with the Eddington ratio (L/L_{Edd}), rather than with the continuum luminosity at 5100\\AA\\ (L_{5100}) or black hole mass (M_{BH}); the only exception is the EW of ultraviolet Fe II emission, which does not corre","authors_text":"1), 2), (2) Carnegie Observatories, (3) Yunnan Observatory, (4) Steward Observatory, (5) National Astronomical Observatories, China, China), Hongyan Zhou (1), Huiyuan Wang (1), Jianguo Wang (3, Luis C. Ho (2), Tinggui Wang (1), Weimin Yuan (5) ((1) Univ. of Sci. & Tech. of China, Xiaobo Dong (1, Xiaohui Fan (4)","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-03-29T16:19:57Z","title":"What controls the Fe II strength in active galactic nuclei?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0903.5020","kind":"arxiv","version":3},"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:e329d24ae1d0d9071f647873e49e3b8deb364b9cc79be39cc464d488662d077c","target":"record","created_at":"2026-05-18T04:17:04Z","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":"c11ef5391bbd6a6a6ef15175cbaea20d119d4b40a27b7910610f6998fcad3bf3","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-03-29T16:19:57Z","title_canon_sha256":"ad6798d1b16ea05ec8afff28d5e12b892fe7ba16d5c7f3a1757109dd60cd2e4b"},"schema_version":"1.0","source":{"id":"0903.5020","kind":"arxiv","version":3}},"canonical_sha256":"2ff63018f65fe60cdcc8d705b749039ecb24186e77785e2948cc4eedd3694343","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2ff63018f65fe60cdcc8d705b749039ecb24186e77785e2948cc4eedd3694343","first_computed_at":"2026-05-18T04:17:04.683902Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:17:04.683902Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ssaIWaR4sOZ6Lg2RZm4I7KaTMCVxNMseva6GeS9t9s7fH5/GUh8XVPzfkO1KzFt/hp4DpHomSfMpqt9IT+I2Bw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:17:04.684435Z","signed_message":"canonical_sha256_bytes"},"source_id":"0903.5020","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e329d24ae1d0d9071f647873e49e3b8deb364b9cc79be39cc464d488662d077c","sha256:8776d343a61bedde8d449282b65e3d7ecbcaa52deb65ef811b3cc4e50d734ebc"],"state_sha256":"e87938b2c7a0b01d89c56b9c910afb6a3bfb4dce137a4ad17ad5885a5d145d52"}