{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:PXDDAH6SKGSPC5ALONRD2GQSSH","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":"bcb682c645b3a47fa521e4be8946ad91a82252c74fef2eed4808cc48cb44df9e","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-07-05T22:13:15Z","title_canon_sha256":"565eaf8ee955a6fc763e88bc727cf285f695cf8094e3fc624364418ecfdd402c"},"schema_version":"1.0","source":{"id":"2207.02340","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2207.02340","created_at":"2026-07-05T04:41:46Z"},{"alias_kind":"arxiv_version","alias_value":"2207.02340v1","created_at":"2026-07-05T04:41:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2207.02340","created_at":"2026-07-05T04:41:46Z"},{"alias_kind":"pith_short_12","alias_value":"PXDDAH6SKGSP","created_at":"2026-07-05T04:41:46Z"},{"alias_kind":"pith_short_16","alias_value":"PXDDAH6SKGSPC5AL","created_at":"2026-07-05T04:41:46Z"},{"alias_kind":"pith_short_8","alias_value":"PXDDAH6S","created_at":"2026-07-05T04:41:46Z"}],"graph_snapshots":[{"event_id":"sha256:ecd130b8464c961b3052d5dc6fe29b7ba74def59045b29135be9cb052c2549f7","target":"graph","created_at":"2026-07-05T04:41:46Z","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/2207.02340/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Understanding if and when the accretion disc extends down to the innermost stable circular orbit (ISCO) is important since it is the fundamental assumption behind measuring black hole spin. Here, we examine the 2013 and 2018 NuSTAR and Swift data (0.5 - 50 keV) of the narrow-line Seyfert 1 galaxy, WKK 4438. The X-ray emission can be fitted well with models depicting a corona and blurred reflection originating from a disc around a low spin (a* ~ 0) black hole. However, such models result in unconventional values for some of the parameters (e.g. inverted emissivity profile and high coronal heigh","authors_text":"D. J. Walton, F. D'Ammando, J. Jiang, L. C. Gallo, M. Z. Buhariwalla","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-07-05T22:13:15Z","title":"A truncated inner disc in the Seyfert 1 galaxy WKK 4438"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2207.02340","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:d87ae17e7df583fe836ed2425bdaa25ea7ea4e5c3ca557f276d97d57ac722bdf","target":"record","created_at":"2026-07-05T04:41:46Z","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":"bcb682c645b3a47fa521e4be8946ad91a82252c74fef2eed4808cc48cb44df9e","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-07-05T22:13:15Z","title_canon_sha256":"565eaf8ee955a6fc763e88bc727cf285f695cf8094e3fc624364418ecfdd402c"},"schema_version":"1.0","source":{"id":"2207.02340","kind":"arxiv","version":1}},"canonical_sha256":"7dc6301fd251a4f1740b73623d1a1291e85cfbcd168ab42e58feaa1a840b99c1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7dc6301fd251a4f1740b73623d1a1291e85cfbcd168ab42e58feaa1a840b99c1","first_computed_at":"2026-07-05T04:41:46.440949Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:41:46.440949Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RaAFRTrdWDZMeb0wMAGevcZplUxlat0j6Pqe7B14BZGh5AJ9se62ojatmeSiDX2qL4fnb3ghc9rGYI99jd5cCg==","signature_status":"signed_v1","signed_at":"2026-07-05T04:41:46.441367Z","signed_message":"canonical_sha256_bytes"},"source_id":"2207.02340","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d87ae17e7df583fe836ed2425bdaa25ea7ea4e5c3ca557f276d97d57ac722bdf","sha256:ecd130b8464c961b3052d5dc6fe29b7ba74def59045b29135be9cb052c2549f7"],"state_sha256":"c267d9552467e76ff3f619e384b0fb941560f4d55d9005ac1ef57ea2949f9c9e"}