{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:R6PVBDNMYNOZSHHPAJVCD3IVX6","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":"d08be0a6a559d271f36e32e1206c211e3073b4ba34844bc56b23a347439da76a","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-07-24T10:21:52Z","title_canon_sha256":"fd56473ce56fbefb8b6e6318f005b1c03d7350f0f8ccdb62b7f8465f06f2c827"},"schema_version":"1.0","source":{"id":"1207.5645","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1207.5645","created_at":"2026-05-18T03:48:13Z"},{"alias_kind":"arxiv_version","alias_value":"1207.5645v1","created_at":"2026-05-18T03:48:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1207.5645","created_at":"2026-05-18T03:48:13Z"},{"alias_kind":"pith_short_12","alias_value":"R6PVBDNMYNOZ","created_at":"2026-05-18T12:27:20Z"},{"alias_kind":"pith_short_16","alias_value":"R6PVBDNMYNOZSHHP","created_at":"2026-05-18T12:27:20Z"},{"alias_kind":"pith_short_8","alias_value":"R6PVBDNM","created_at":"2026-05-18T12:27:20Z"}],"graph_snapshots":[{"event_id":"sha256:71d8208f0b7aff0aeca4449da1bc335fc28d91376a3a1420292789db822050b4","target":"graph","created_at":"2026-05-18T03:48:13Z","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":"Pulsar Timing Arrays are a prime tool to study unexplored astrophysical regimes with gravitational waves. Here we show that the detection of gravitational radiation from individually resolvable super-massive black hole binary systems can yield direct information about the masses and spins of the black holes, provided that the gravitational-wave induced timing fluctuations both at the pulsar and at the Earth are detected. This in turn provides a map of the non-linear dynamics of the gravitational field and a new avenue to tackle open problems in astrophysics connected to the formation and evolu","authors_text":"A. Vecchio, C. M. F. Mingarelli, K. Grover, R. J. E. Smith, T. Sidery","cross_cats":["gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-07-24T10:21:52Z","title":"Observing the dynamics of super-massive black hole binaries with Pulsar Timing Arrays"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.5645","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":"sha256:39b20eb1596383f2543d1fe2ff7b7ae2aee544ac8eac5c100785350b1aaa8b6f","target":"record","created_at":"2026-05-18T03:48:13Z","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":"d08be0a6a559d271f36e32e1206c211e3073b4ba34844bc56b23a347439da76a","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-07-24T10:21:52Z","title_canon_sha256":"fd56473ce56fbefb8b6e6318f005b1c03d7350f0f8ccdb62b7f8465f06f2c827"},"schema_version":"1.0","source":{"id":"1207.5645","kind":"arxiv","version":1}},"canonical_sha256":"8f9f508dacc35d991cef026a21ed15bf8812a8ba5ecbefb5152319804424d5cd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8f9f508dacc35d991cef026a21ed15bf8812a8ba5ecbefb5152319804424d5cd","first_computed_at":"2026-05-18T03:48:13.096871Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:48:13.096871Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uD/ONQk49jiP9abL0B7QBc/3k6BZuJ7zDtrntLV1EOoX1Hl3AL6QtT057YuhlC+IDz/LCgnrYQ/9hBfZJjiUDg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:48:13.097641Z","signed_message":"canonical_sha256_bytes"},"source_id":"1207.5645","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:39b20eb1596383f2543d1fe2ff7b7ae2aee544ac8eac5c100785350b1aaa8b6f","sha256:71d8208f0b7aff0aeca4449da1bc335fc28d91376a3a1420292789db822050b4"],"state_sha256":"2f8ddcf791ce06a8db4312f0ec42ead6fa20d59eb34bf489cec452e1715474e1"}