{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:FYIJ7SIPASSM4BSD4PUWGSGP5Y","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":"b3a62acb1aa16fe35b54fda103d5185aeddb42327b86eb3833c98175ad2eebe7","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-12-02T16:47:31Z","title_canon_sha256":"351da32e8f62c17f1666493a9a146e1bbb8e78db802a96bbaeffa73276bc135f"},"schema_version":"1.0","source":{"id":"0912.0456","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0912.0456","created_at":"2026-05-18T02:34:02Z"},{"alias_kind":"arxiv_version","alias_value":"0912.0456v2","created_at":"2026-05-18T02:34:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0912.0456","created_at":"2026-05-18T02:34:02Z"},{"alias_kind":"pith_short_12","alias_value":"FYIJ7SIPASSM","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_16","alias_value":"FYIJ7SIPASSM4BSD","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_8","alias_value":"FYIJ7SIP","created_at":"2026-05-18T12:25:59Z"}],"graph_snapshots":[{"event_id":"sha256:f9b2e6dacfe1cdb7aa92e70ffa76adeeac798f4d7b04c7b3448c5cfe268156ff","target":"graph","created_at":"2026-05-18T02:34:02Z","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":"Long-exposure Suzaku X-ray observations of the active galaxy NGC 4051 from 2005 and 2008 are analysed, in an attempt to reach a self-consistent understanding of the spectral variability on long timescales and at high time resolution. Principal components analysis and a maximum likelihood method of power spectrum analysis are used. In common with other type I AGN, the spectral variability is dominated by a varying-normalisation power-law component together with a quasi-steady, hard-spectrum offset component that contains Fe K atomic features. NGC 4051 displays a strong excess over a power-law a","authors_text":"A. Lobban, D.M. Crenshaw, J.N. Reeves, L. Miller, S.B. Kraemer, T.J. Turner","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-12-02T16:47:31Z","title":"Spectral variability and reverberation time delays in the Suzaku X-ray spectrum of NGC 4051"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0912.0456","kind":"arxiv","version":2},"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":"sha256:93d28a0ee6bf1a78727af4bf3bf750265ab44cab2d79a3a2a97453d051c0717d","target":"record","created_at":"2026-05-18T02:34:02Z","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":"b3a62acb1aa16fe35b54fda103d5185aeddb42327b86eb3833c98175ad2eebe7","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-12-02T16:47:31Z","title_canon_sha256":"351da32e8f62c17f1666493a9a146e1bbb8e78db802a96bbaeffa73276bc135f"},"schema_version":"1.0","source":{"id":"0912.0456","kind":"arxiv","version":2}},"canonical_sha256":"2e109fc90f04a4ce0643e3e96348cfee01cd89135e5b33bc567f0c6888765055","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2e109fc90f04a4ce0643e3e96348cfee01cd89135e5b33bc567f0c6888765055","first_computed_at":"2026-05-18T02:34:02.595252Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:34:02.595252Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZOCcEY6vsZI+Cvmo0+/hj430EW75ETd6bXlEquLL4iH+8phv2dsMo5CL6hD4qnl/Wk0PnzKzEbnrOe+6eKsKAg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:34:02.595740Z","signed_message":"canonical_sha256_bytes"},"source_id":"0912.0456","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:93d28a0ee6bf1a78727af4bf3bf750265ab44cab2d79a3a2a97453d051c0717d","sha256:f9b2e6dacfe1cdb7aa92e70ffa76adeeac798f4d7b04c7b3448c5cfe268156ff"],"state_sha256":"c6afe77284285209b71985dec92fa0fe46ba09877068d613ed93e806a35d3164"}