{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:YQRMBACOVIF4QC5GR37BBKYCKP","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":"18c2831eb69349c302c02f6ba4a5abd35f3b0581f91898f4f65f78322622ca8a","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-01-25T09:15:27Z","title_canon_sha256":"a50f8f4251ae80fbbc84b98090e33122335b306f08e6352b4b5f8e8f0f846c81"},"schema_version":"1.0","source":{"id":"1201.5210","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1201.5210","created_at":"2026-05-18T01:58:42Z"},{"alias_kind":"arxiv_version","alias_value":"1201.5210v2","created_at":"2026-05-18T01:58:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1201.5210","created_at":"2026-05-18T01:58:42Z"},{"alias_kind":"pith_short_12","alias_value":"YQRMBACOVIF4","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_16","alias_value":"YQRMBACOVIF4QC5G","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_8","alias_value":"YQRMBACO","created_at":"2026-05-18T12:27:30Z"}],"graph_snapshots":[{"event_id":"sha256:75a02758b81624667dcd2dd1d172e6d2b526da3a8319c286a0d1449c68830e05","target":"graph","created_at":"2026-05-18T01:58:42Z","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"},"paper":{"abstract_excerpt":"We studied the X-ray timing and spectral variability of the X-ray source Sw J1644+57, a candidate for a tidal disruption event. We have separated the long-term trend (an initial decline followed by a plateau) from the short-term dips in the Swift light-curve. Power spectra and Lomb-Scargle periodograms hint at possible periodic modulation. By using structure function analysis, we have shown that the dips were not random but occurred preferentially at time intervals ~ [2.3, 4.5, 9] x 10^5 s and their higher-order multiples. After the plateau epoch, dipping resumed at ~ [0.7, 1.4] x 10^6 s and t","authors_text":"Curtis J. Saxton, Kinwah Wu, N. Paul M. Kuin, Roberto Soria","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-01-25T09:15:27Z","title":"Long-term X-ray variability of Swift J1644+57"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1201.5210","kind":"arxiv","version":2},"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":"sha256:77429f94e31b013ac73fe0c8418e949b33b27883fd19e2de16d87ea0f7c71dd9","target":"record","created_at":"2026-05-18T01:58:42Z","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":"18c2831eb69349c302c02f6ba4a5abd35f3b0581f91898f4f65f78322622ca8a","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-01-25T09:15:27Z","title_canon_sha256":"a50f8f4251ae80fbbc84b98090e33122335b306f08e6352b4b5f8e8f0f846c81"},"schema_version":"1.0","source":{"id":"1201.5210","kind":"arxiv","version":2}},"canonical_sha256":"c422c0804eaa0bc80ba68efe10ab0253c9a72444a944fe37699c86c8478bb576","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c422c0804eaa0bc80ba68efe10ab0253c9a72444a944fe37699c86c8478bb576","first_computed_at":"2026-05-18T01:58:42.237912Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:58:42.237912Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1areGJyHmFZLWzHWWaSk1/2rldClf+DEkTUvxZvkE4hcdqv8ewRXBLncSsD+llLvxkHOB7WOc0He5b2ARxuMDg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:58:42.238614Z","signed_message":"canonical_sha256_bytes"},"source_id":"1201.5210","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:77429f94e31b013ac73fe0c8418e949b33b27883fd19e2de16d87ea0f7c71dd9","sha256:75a02758b81624667dcd2dd1d172e6d2b526da3a8319c286a0d1449c68830e05"],"state_sha256":"6febbad0db3289689c1e569f17fa620ed8d5f347b1c956979bac674da548f65e"}