{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:4PCNEVDIGDLSS22BV4YB4L3LAB","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":"3040dfc158f72d0470b102b077a9ad6bacc82dbc6cdbf4b64d62e3c32b56c1a9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-03-06T19:04:50Z","title_canon_sha256":"194a96ad55ea0a78b968e5999d8ad147f958b1f2e3d9c3d5cadd4e5d8c72420c"},"schema_version":"1.0","source":{"id":"1903.02584","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.02584","created_at":"2026-05-17T23:51:51Z"},{"alias_kind":"arxiv_version","alias_value":"1903.02584v1","created_at":"2026-05-17T23:51:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.02584","created_at":"2026-05-17T23:51:51Z"},{"alias_kind":"pith_short_12","alias_value":"4PCNEVDIGDLS","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_16","alias_value":"4PCNEVDIGDLSS22B","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_8","alias_value":"4PCNEVDI","created_at":"2026-05-18T12:33:10Z"}],"graph_snapshots":[{"event_id":"sha256:3cfc01e38d8bd057d0ad920b20a2cd84a2ae4df291f3294a7de151c00741071e","target":"graph","created_at":"2026-05-17T23:51:51Z","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":"The question of how supermassive black holes (SMBHs) grow over cosmic time is a major puzzle in high-energy astrophysics. One promising approach to this problem is via the study of tidal disruption flares (TDFs). These are transient events resulting from the disruption of stars by quiescent supermassive black holes at centers of galaxies. A meter-class X-ray observatory with a time resolution $\\sim$ a millisecond and a spectral resolution of a few eV at KeV energies would be revolutionary as it will facilitate high signal to noise spectral-timing studies of several cosmological TDFs. It would ","authors_text":"Dacheng Lin (University of New Hampshire), Dheeraj R. Pasham (MIT), Erin Kara (UMD), Katie Auchettl (DARK), Nicholas Stone (Columbia), Peter Jonker (SRON), Peter Maksym (Harvard), Richard Saxton (Telespazio-Vega)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-03-06T19:04:50Z","title":"Probing the Cosmological Evolution of Super-massive Black Holes using Tidal Disruption Flares"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.02584","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:c1562841fc13ffc15df3a22258fec0dc9e6c3843840c69829e5f2e3a2591d5ad","target":"record","created_at":"2026-05-17T23:51:51Z","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":"3040dfc158f72d0470b102b077a9ad6bacc82dbc6cdbf4b64d62e3c32b56c1a9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-03-06T19:04:50Z","title_canon_sha256":"194a96ad55ea0a78b968e5999d8ad147f958b1f2e3d9c3d5cadd4e5d8c72420c"},"schema_version":"1.0","source":{"id":"1903.02584","kind":"arxiv","version":1}},"canonical_sha256":"e3c4d2546830d7296b41af301e2f6b0066895fcca7a6171e937194d130ce7086","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e3c4d2546830d7296b41af301e2f6b0066895fcca7a6171e937194d130ce7086","first_computed_at":"2026-05-17T23:51:51.796654Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:51:51.796654Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8yvetCOv03C8l+a5GSjjQWxpZToOD0T+7I7/U+6QSjiD/Vf/laIpNINsTrcWyAqKuKFk80HAY/di+yCmDVluBQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:51:51.797490Z","signed_message":"canonical_sha256_bytes"},"source_id":"1903.02584","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c1562841fc13ffc15df3a22258fec0dc9e6c3843840c69829e5f2e3a2591d5ad","sha256:3cfc01e38d8bd057d0ad920b20a2cd84a2ae4df291f3294a7de151c00741071e"],"state_sha256":"0d8b57b41df4d580c7a5c58f459a01737f56007cf22f0de89d2bf0f823acda59"}