{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2001:XXDQFWSNYBRTYJAFVEN3WH52IB","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":"56cdfc009ee512511d50b3f06ad5776da00fa8a464d015ede2412489dba378c8","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2001-02-26T09:05:44Z","title_canon_sha256":"5d131af7678469a32080047c8395ed50fba05baa68bb3b8353b9a8a98205d41b"},"schema_version":"1.0","source":{"id":"astro-ph/0102438","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0102438","created_at":"2026-07-04T16:22:46Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0102438v1","created_at":"2026-07-04T16:22:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0102438","created_at":"2026-07-04T16:22:46Z"},{"alias_kind":"pith_short_12","alias_value":"XXDQFWSNYBRT","created_at":"2026-07-04T16:22:46Z"},{"alias_kind":"pith_short_16","alias_value":"XXDQFWSNYBRTYJAF","created_at":"2026-07-04T16:22:46Z"},{"alias_kind":"pith_short_8","alias_value":"XXDQFWSN","created_at":"2026-07-04T16:22:46Z"}],"graph_snapshots":[{"event_id":"sha256:d7a34de7d2631d52dd02170e6f0f8b237dffa80686d57515c4286425fc6f58b7","target":"graph","created_at":"2026-07-04T16:22:46Z","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/0102438/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"BeppoSAX observed NGC4258 on December 1998, when its 2-10 keV luminosity was \\~1E41 erg/s. 100% variability is observed in the 3-10 keV band on timescales of a half a day while 20% variability is observed on timescales of one hour. The nuclear component is visible above 2 keV only, being obscured by a column density of (9.5+/-1.2)E22 cm-2; this component is detected up to 70 keV with S/N>=3 and with the steep power law energy index of 1.11+/-0.14. Bremsstrahlung emission for the 2-70 keV X-ray luminosity, as expected in ADAF models with strong winds, is ruled out by the data. The ratio between","authors_text":"A. Comastri, A. Siemiginowska, B. Wilkes, E. Giallongo, F. Fiore, G. Matt, G. Trinchieri, L.A. Antonelli, R. Della Ceca, S. Mathur, S. Molendi, S. Pellegrini","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2001-02-26T09:05:44Z","title":"The BeppoSAX view of the X-ray active nucleus of NGC4258"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0102438","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":"sha256:55f0eadedbbbd27ac932ec7f6b8818e72bfd6ae1dc783837a2a425d2c06c218d","target":"record","created_at":"2026-07-04T16:22:46Z","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":"56cdfc009ee512511d50b3f06ad5776da00fa8a464d015ede2412489dba378c8","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2001-02-26T09:05:44Z","title_canon_sha256":"5d131af7678469a32080047c8395ed50fba05baa68bb3b8353b9a8a98205d41b"},"schema_version":"1.0","source":{"id":"astro-ph/0102438","kind":"arxiv","version":1}},"canonical_sha256":"bdc702da4dc0633c2405a91bbb1fba40410b8691f98330c9ea3eb203f9bacfd8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bdc702da4dc0633c2405a91bbb1fba40410b8691f98330c9ea3eb203f9bacfd8","first_computed_at":"2026-07-04T16:22:46.981048Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:22:46.981048Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Pa3CknuaZhg7PyiP61APvcX/gxdIUKtcqc0BrqiMrRtjX+7kawj4MuPv2ll193SLu67vi/QwDYOJVs3akjA/CQ==","signature_status":"signed_v1","signed_at":"2026-07-04T16:22:46.981518Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0102438","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:55f0eadedbbbd27ac932ec7f6b8818e72bfd6ae1dc783837a2a425d2c06c218d","sha256:d7a34de7d2631d52dd02170e6f0f8b237dffa80686d57515c4286425fc6f58b7"],"state_sha256":"9447a7e677a49308fc8e2a197765b80bc7c5c86a23b82a460b4539c86fc7ea0a"}