{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:DX3KG4LPMDNRE3P45P62CTH2Z2","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":"ff688bf4a74aceff529ae2daa9e0e45ef023542f3e579e996bb10936d1ceaa10","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-07-31T18:06:11Z","title_canon_sha256":"e153534060bebc422837424450d9cfcd7082ae79433a066e291fc1e8ec60f8cc"},"schema_version":"1.0","source":{"id":"2408.00089","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2408.00089","created_at":"2026-07-05T08:50:45Z"},{"alias_kind":"arxiv_version","alias_value":"2408.00089v1","created_at":"2026-07-05T08:50:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2408.00089","created_at":"2026-07-05T08:50:45Z"},{"alias_kind":"pith_short_12","alias_value":"DX3KG4LPMDNR","created_at":"2026-07-05T08:50:45Z"},{"alias_kind":"pith_short_16","alias_value":"DX3KG4LPMDNRE3P4","created_at":"2026-07-05T08:50:45Z"},{"alias_kind":"pith_short_8","alias_value":"DX3KG4LP","created_at":"2026-07-05T08:50:45Z"}],"graph_snapshots":[{"event_id":"sha256:7fb12ae0b3ec4de1e799b0de28b3edf1f7850696bcd0dac0689ee2192c27a74d","target":"graph","created_at":"2026-07-05T08:50:45Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2408.00089/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The extremes of Active Galactic Nuclei (AGN) variability offer valuable new insights into the drivers and physics of AGN. We discuss some of the most extreme cases of AGN variability; the highest amplitudes, deep minima states, extreme spectral states, Seyfert-type changes, and semi-periodic signals, including new X-ray observations. The properties of changing-look (CL) AGN are briefly reviewed and a classification scheme is proposed which encompasses the variety of CL phenomena; distinguishing slow and fast events, repeat events, and frozen-look AGN which do not show any emission-line respons","authors_text":"A.B. Kovacevic, A. Kraus, D. De Cicco, D. Grupe, D. Ilic, E. Bon, F. Iacob, J. Kovacevic Dojcinovic, K.K. Gupta, L.C. Popovic, M. Pannikkote, M.S. Dimitrijevic, N. Bon, P. Marziani, S. Komossa, S. Marceta-Mandic, V.A. Sreckovic, V. Petrecca, Z. Haiman","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-07-31T18:06:11Z","title":"The extremes of AGN variability: outbursts, deep fades, changing looks, exceptional spectral states, and semi-periodicities"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2408.00089","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":"sha256:31365e87d0a7952d3729959c1dd0558a4e3b0f3b5a8c73b4741ab0ca1c1250f6","target":"record","created_at":"2026-07-05T08:50:45Z","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":"ff688bf4a74aceff529ae2daa9e0e45ef023542f3e579e996bb10936d1ceaa10","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-07-31T18:06:11Z","title_canon_sha256":"e153534060bebc422837424450d9cfcd7082ae79433a066e291fc1e8ec60f8cc"},"schema_version":"1.0","source":{"id":"2408.00089","kind":"arxiv","version":1}},"canonical_sha256":"1df6a3716f60db126dfcebfda14cfaceb7187784658091f12ba0a46158ef3d37","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1df6a3716f60db126dfcebfda14cfaceb7187784658091f12ba0a46158ef3d37","first_computed_at":"2026-07-05T08:50:45.027842Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:50:45.027842Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WB4aJKUBnXOoPavvmYr51OPwePxtny5fgfrPQy9nZaVU6DsB0q6J+K1FdH9e9/FbsF+A5iFrn1P5e4BWhWMJAw==","signature_status":"signed_v1","signed_at":"2026-07-05T08:50:45.028250Z","signed_message":"canonical_sha256_bytes"},"source_id":"2408.00089","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:31365e87d0a7952d3729959c1dd0558a4e3b0f3b5a8c73b4741ab0ca1c1250f6","sha256:7fb12ae0b3ec4de1e799b0de28b3edf1f7850696bcd0dac0689ee2192c27a74d"],"state_sha256":"b42e20cad7c6099e4b6ebcf38e3110f5ba25bfbe3013388a96e27e438ff58d1a"}