{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:DT2VGC66KT4GAPQUOT5XVGUIHK","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":"cf0ad8030d5bcf24112cf747305e4eb6eea433336f6b0f4c6abdacd52b00acfc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-09-16T17:47:37Z","title_canon_sha256":"8fd1734c530adccad7b69feb031cb6119c51e0af4e3dd819cd2bc9bdf0b668a4"},"schema_version":"1.0","source":{"id":"2009.07832","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2009.07832","created_at":"2026-07-05T02:26:49Z"},{"alias_kind":"arxiv_version","alias_value":"2009.07832v4","created_at":"2026-07-05T02:26:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.07832","created_at":"2026-07-05T02:26:49Z"},{"alias_kind":"pith_short_12","alias_value":"DT2VGC66KT4G","created_at":"2026-07-05T02:26:49Z"},{"alias_kind":"pith_short_16","alias_value":"DT2VGC66KT4GAPQU","created_at":"2026-07-05T02:26:49Z"},{"alias_kind":"pith_short_8","alias_value":"DT2VGC66","created_at":"2026-07-05T02:26:49Z"}],"graph_snapshots":[{"event_id":"sha256:6ec965ae61ca132be5970f584649275ab9c70096d9c28ad666ed8bd2ffbf28e1","target":"graph","created_at":"2026-07-05T02:26:49Z","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/2009.07832/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We show that the recent NANOGrav result can be interpreted as a stochastic gravitational wave signal associated to formation of primordial black holes from high-amplitude curvature perturbations. The indicated amplitude and power of the gravitational wave spectrum agrees well with formation of primordial seeds for supermassive black holes.","authors_text":"Hardi Veerm\\\"ae, Ville Vaskonen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-09-16T17:47:37Z","title":"Did NANOGrav see a signal from primordial black hole formation?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.07832","kind":"arxiv","version":4},"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":"sha256:17393b4ed292c28c25f5c84e55e58053787b7eb92ebad929266ce162830fde85","target":"record","created_at":"2026-07-05T02:26:49Z","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":"cf0ad8030d5bcf24112cf747305e4eb6eea433336f6b0f4c6abdacd52b00acfc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-09-16T17:47:37Z","title_canon_sha256":"8fd1734c530adccad7b69feb031cb6119c51e0af4e3dd819cd2bc9bdf0b668a4"},"schema_version":"1.0","source":{"id":"2009.07832","kind":"arxiv","version":4}},"canonical_sha256":"1cf5530bde54f8603e1474fb7a9a883aa1790018cdcc6cf7a59bef94f1b30a25","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1cf5530bde54f8603e1474fb7a9a883aa1790018cdcc6cf7a59bef94f1b30a25","first_computed_at":"2026-07-05T02:26:49.867240Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:26:49.867240Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"pdOX+/hzUoGLrM53sHZmIlBn58OSE6Ybp1T7+SVBsdaeximx0InLcR77YkVoIqi99dR/5SvczDKQgf2IGZ5xCQ==","signature_status":"signed_v1","signed_at":"2026-07-05T02:26:49.867684Z","signed_message":"canonical_sha256_bytes"},"source_id":"2009.07832","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:17393b4ed292c28c25f5c84e55e58053787b7eb92ebad929266ce162830fde85","sha256:6ec965ae61ca132be5970f584649275ab9c70096d9c28ad666ed8bd2ffbf28e1"],"state_sha256":"21e1bed022938801325b87af513286d89f5273c2d3932e79c3098316c356afbc"}