{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2000:LCWQFITF33S33KZNDZAP4GQOLJ","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":"f7be94833cf26308a096e57853bee006a633aedf3f1c0c6a675201ed789935f4","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-01-07T14:17:36Z","title_canon_sha256":"e1e92fdf202f027da3da93ae24f194ddab443ba243d0bcd94bb181799af11a21"},"schema_version":"1.0","source":{"id":"astro-ph/0001107","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0001107","created_at":"2026-07-04T14:10:05Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0001107v1","created_at":"2026-07-04T14:10:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0001107","created_at":"2026-07-04T14:10:05Z"},{"alias_kind":"pith_short_12","alias_value":"LCWQFITF33S3","created_at":"2026-07-04T14:10:05Z"},{"alias_kind":"pith_short_16","alias_value":"LCWQFITF33S33KZN","created_at":"2026-07-04T14:10:05Z"},{"alias_kind":"pith_short_8","alias_value":"LCWQFITF","created_at":"2026-07-04T14:10:05Z"}],"graph_snapshots":[{"event_id":"sha256:b72919f6a3d6d9e20b1f7dd7b871cf6c9712eff124f22f1ea89634212bd8b7ca","target":"graph","created_at":"2026-07-04T14:10:05Z","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/astro-ph/0001107/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report the transition to an active state of the nucleus in the Seyfert 1.9 galaxy NGC 2992, discovered by means of new hard X-ray data. While the 2-10 keV flux declined by a factor of ~ 20 from 1978 to 1994, two recent BeppoSAX observations in 1997 and in 1998 caught the nuclear emission raising back to the same level of activity observed in 1978.\n  In both BeppoSAX observations the X-ray spectrum of the source is well represented by a power law with spectral index Gamma ~ 1.7, absorbed by a column density of N_H ~ 10^{22} cm^{-2} and characterized by a prominent iron K\\alpha line. While in","authors_text":"A. Marconi, E.J.M. Colbert, G. Risaliti, K.A. Weaver, M. Dadina, R. Gilli, R. Maiolino","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2000-01-07T14:17:36Z","title":"The variability of the Seyfert galaxy NGC 2992: the case for a revived AGN"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0001107","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":"sha256:47b26d836a320ab4921fc117e9521d903f763714b200d872ea04f8f61124ee99","target":"record","created_at":"2026-07-04T14:10:05Z","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":"f7be94833cf26308a096e57853bee006a633aedf3f1c0c6a675201ed789935f4","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-01-07T14:17:36Z","title_canon_sha256":"e1e92fdf202f027da3da93ae24f194ddab443ba243d0bcd94bb181799af11a21"},"schema_version":"1.0","source":{"id":"astro-ph/0001107","kind":"arxiv","version":1}},"canonical_sha256":"58ad02a265dee5bdab2d1e40fe1a0e5a523626af5e1908c9e6ac0f0e7807c7c4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"58ad02a265dee5bdab2d1e40fe1a0e5a523626af5e1908c9e6ac0f0e7807c7c4","first_computed_at":"2026-07-04T14:10:05.309770Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T14:10:05.309770Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZTamiOVaFWpu4n63apJJjKD3fXo7lhdPiSh5DJ7fJNRY/xvRtTu9Z0a5CIaZLyhHclWAE0SYynmTkRAH68F4Bg==","signature_status":"signed_v1","signed_at":"2026-07-04T14:10:05.310270Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0001107","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:47b26d836a320ab4921fc117e9521d903f763714b200d872ea04f8f61124ee99","sha256:b72919f6a3d6d9e20b1f7dd7b871cf6c9712eff124f22f1ea89634212bd8b7ca"],"state_sha256":"047c9894dd34b7d0dec710e28157694cc96b62bd7a0cf4eb19aad6197bd63cf6"}