{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:OS6Q6IFIU3P3252L6UAGM4R572","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":"7cc861cb49106d367877e7c229016155e6f2133ccb7f2e2ab39a3eb500c14531","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-05-16T04:22:51Z","title_canon_sha256":"6009005fe53eca207cf61df590cd028d1a38bb8f640bcd41fa62f4155402b3c3"},"schema_version":"1.0","source":{"id":"2205.07438","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2205.07438","created_at":"2026-07-05T04:35:49Z"},{"alias_kind":"arxiv_version","alias_value":"2205.07438v1","created_at":"2026-07-05T04:35:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2205.07438","created_at":"2026-07-05T04:35:49Z"},{"alias_kind":"pith_short_12","alias_value":"OS6Q6IFIU3P3","created_at":"2026-07-05T04:35:49Z"},{"alias_kind":"pith_short_16","alias_value":"OS6Q6IFIU3P3252L","created_at":"2026-07-05T04:35:49Z"},{"alias_kind":"pith_short_8","alias_value":"OS6Q6IFI","created_at":"2026-07-05T04:35:49Z"}],"graph_snapshots":[{"event_id":"sha256:d02ef8e9bfe80127ad5e8a8bcbc3f7eb383c52113132f4a32d3b7c55c5fa231f","target":"graph","created_at":"2026-07-05T04:35:49Z","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/2205.07438/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We used 13 years of Swift/BAT observations to probe the nature and origin of hard X-ray (14-195 KeV) emission in Centaurus A. Since the beginning of the Swift operation in 2004, significant X-ray variability in the 14-195 KeV band is detected, with mild changes in the source spectrum. Spectral variations became more eminent after 2013, following a softer-when-brighter trend. Using the power spectral density method, we found that the observed hard X-ray photon flux variations are consistent with a red-noise process of slope, $-1.3$ with no evidence for a break in the PSD. We found a significant","authors_text":"A. Y. Lien, B. Rani, J. Y. Kim, M. A. Gurwell, R. Mushotzky, S. A. Mundo","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-05-16T04:22:51Z","title":"Hard X-ray emission in Centaurus A"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2205.07438","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":"sha256:972b324d3a2cc4297425b95ba3a761ee1d1a327dbc7947af95dc5480b7f22b58","target":"record","created_at":"2026-07-05T04:35:49Z","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":"7cc861cb49106d367877e7c229016155e6f2133ccb7f2e2ab39a3eb500c14531","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-05-16T04:22:51Z","title_canon_sha256":"6009005fe53eca207cf61df590cd028d1a38bb8f640bcd41fa62f4155402b3c3"},"schema_version":"1.0","source":{"id":"2205.07438","kind":"arxiv","version":1}},"canonical_sha256":"74bd0f20a8a6dfbd774bf50066723dfe9a4ad4610f664d53cf0310533083397f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"74bd0f20a8a6dfbd774bf50066723dfe9a4ad4610f664d53cf0310533083397f","first_computed_at":"2026-07-05T04:35:49.614691Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:35:49.614691Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"H+BuUbXTYAFbI2E+TZBwjpvjHcx2OzvQwKdHLqLwHpNtKRfLYLPclGrqJqxCCb0wPc0tst7fTScuahTJEjpYDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T04:35:49.615038Z","signed_message":"canonical_sha256_bytes"},"source_id":"2205.07438","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:972b324d3a2cc4297425b95ba3a761ee1d1a327dbc7947af95dc5480b7f22b58","sha256:d02ef8e9bfe80127ad5e8a8bcbc3f7eb383c52113132f4a32d3b7c55c5fa231f"],"state_sha256":"11e835c210b2f8036ea97ab8868a7bed5f55c00654050361d09223e9dc419bad"}