{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:RJQEXXKY4HD67TC7NQOYOIQTHQ","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":"54d20d0aa566cb5aee78a6f83f4a4ee7e30b1f07db3a3491e757ee76caff69ca","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-03-11T21:13:22Z","title_canon_sha256":"60bc69b9f9c1d403285649d7bfa54640d1d077909a408ca175bd162d9cda4c13"},"schema_version":"1.0","source":{"id":"0903.2059","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0903.2059","created_at":"2026-05-18T02:14:35Z"},{"alias_kind":"arxiv_version","alias_value":"0903.2059v2","created_at":"2026-05-18T02:14:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0903.2059","created_at":"2026-05-18T02:14:35Z"},{"alias_kind":"pith_short_12","alias_value":"RJQEXXKY4HD6","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"RJQEXXKY4HD67TC7","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"RJQEXXKY","created_at":"2026-05-18T12:26:01Z"}],"graph_snapshots":[{"event_id":"sha256:b354361a614946413f0cb428a8bf8b6ca3713048731fd0b4377460335a41e3d1","target":"graph","created_at":"2026-05-18T02:14:35Z","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":"Many scenarios have been proposed for the origin of the supermassive black holes (SMBHs) that are found in the centres of most galaxies. Many of these formation scenarios predict a high-redshift population of intermediate-mass black holes (IMBHs), with masses in the range 100 to 100000 times that of the Sun. A powerful way to observe these IMBHs is via gravitational waves the black holes emit as they merge. The statistics of the observed black hole population should, in principle, allow us to discriminate between competing astrophysical scenarios for the origin and formation of SMBHs. However,","authors_text":"Daniel C. Jacobs, Joseph E. Plowman, Ronald W. Hellings, Sachiko Tsuruta, Shane L. Larson","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-03-11T21:13:22Z","title":"Constraining the Black Hole Mass Spectrum with Gravitational Wave Observations I: The Error Kernel"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0903.2059","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:ac2ff03d7619176fe1b97751fb9e1cc1220d230801150cb16f11c300f42d227a","target":"record","created_at":"2026-05-18T02:14:35Z","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":"54d20d0aa566cb5aee78a6f83f4a4ee7e30b1f07db3a3491e757ee76caff69ca","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-03-11T21:13:22Z","title_canon_sha256":"60bc69b9f9c1d403285649d7bfa54640d1d077909a408ca175bd162d9cda4c13"},"schema_version":"1.0","source":{"id":"0903.2059","kind":"arxiv","version":2}},"canonical_sha256":"8a604bdd58e1c7efcc5f6c1d8722133c170739c2adf4a2931141b3821448334e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8a604bdd58e1c7efcc5f6c1d8722133c170739c2adf4a2931141b3821448334e","first_computed_at":"2026-05-18T02:14:35.817795Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:14:35.817795Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gEUms+jp2BgBzm8MaRj4zpQV/rQ78PM5r9iF7E96wpT8cqZ4f0lCecSSVYYTb53u8r6NGYswBdf8nchR6xp6BQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:14:35.818555Z","signed_message":"canonical_sha256_bytes"},"source_id":"0903.2059","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ac2ff03d7619176fe1b97751fb9e1cc1220d230801150cb16f11c300f42d227a","sha256:b354361a614946413f0cb428a8bf8b6ca3713048731fd0b4377460335a41e3d1"],"state_sha256":"0f3f5cd9369d8de0720863f546426d3fb8dadf6813714d987e66bd17414e1f94"}