{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:UMGYESKRJMUXTSVUB6TSNHCMP6","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":"5eb1107191929fa994982379d5263c5dd8fc802727e1e14ba9aa88ea2f4c85ee","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-09-14T18:23:02Z","title_canon_sha256":"75221066a7972cf0904e6ccddfebf69099a9b789b9975e41cbcfc143e54aa1d8"},"schema_version":"1.0","source":{"id":"2109.06914","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2109.06914","created_at":"2026-07-05T03:16:25Z"},{"alias_kind":"arxiv_version","alias_value":"2109.06914v1","created_at":"2026-07-05T03:16:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.06914","created_at":"2026-07-05T03:16:25Z"},{"alias_kind":"pith_short_12","alias_value":"UMGYESKRJMUX","created_at":"2026-07-05T03:16:25Z"},{"alias_kind":"pith_short_16","alias_value":"UMGYESKRJMUXTSVU","created_at":"2026-07-05T03:16:25Z"},{"alias_kind":"pith_short_8","alias_value":"UMGYESKR","created_at":"2026-07-05T03:16:25Z"}],"graph_snapshots":[{"event_id":"sha256:c08481622ffcabfb76066db7b2403befd5e1e936993932076f6f2546b80b6370","target":"graph","created_at":"2026-07-05T03:16:25Z","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/2109.06914/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present an analysis of historical multi-wavelength emission of the Changing Look (CL) Active Galactic Nucleus (AGN) in NGC 2992, covering epochs ranging from 1978 to 2021, as well as new X-ray and optical spectra. The galaxy presents multiple Seyfert type transitions from type 2 to intermediate-type, losing and regaining its H$\\alpha$ BEL recurrently. In X-rays, the source shows intrinsic variability with the absorption corrected luminosity varying by a factor of $\\sim$ 40. We rule out tidal disruption events or variable obscuration as causes of the type transitions and show that the presen","authors_text":"Andrew Robinson, Bradley M. Peterson, Daniel Ruschel-Dutra, Dirk Grupe, Jaderson Schimoia, Muryel Guolo, Rodrigo Nemmen, Thaisa Storchi-Bergmann","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-09-14T18:23:02Z","title":"The Eddington ratio-dependent changing look events in NGC 2992"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.06914","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":"sha256:0ce2fa0899d3f8a83ee6e62c9f202097a8b844c926cf9347a3b61c05d13fc756","target":"record","created_at":"2026-07-05T03:16:25Z","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":"5eb1107191929fa994982379d5263c5dd8fc802727e1e14ba9aa88ea2f4c85ee","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-09-14T18:23:02Z","title_canon_sha256":"75221066a7972cf0904e6ccddfebf69099a9b789b9975e41cbcfc143e54aa1d8"},"schema_version":"1.0","source":{"id":"2109.06914","kind":"arxiv","version":1}},"canonical_sha256":"a30d8249514b2979cab40fa7269c4c7fb5cd20a3cd2db6c7b13f4becf0156268","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a30d8249514b2979cab40fa7269c4c7fb5cd20a3cd2db6c7b13f4becf0156268","first_computed_at":"2026-07-05T03:16:25.857787Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:16:25.857787Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"tGF8Mfs5KHqtndUdXLS3wO0styMY8yW+jm3jpJHTAlN6t7KHBP3/5MUCPFyRDS/j2871r02TyToAQHy953SPBg==","signature_status":"signed_v1","signed_at":"2026-07-05T03:16:25.858199Z","signed_message":"canonical_sha256_bytes"},"source_id":"2109.06914","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0ce2fa0899d3f8a83ee6e62c9f202097a8b844c926cf9347a3b61c05d13fc756","sha256:c08481622ffcabfb76066db7b2403befd5e1e936993932076f6f2546b80b6370"],"state_sha256":"603cfff4fd780341c3ceb8ec819098d5a38fe684ca1b08f705827d810aa06f4d"}