{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:ORFHPVQJXAYWOWI247Z74SOVJO","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":"6521bbfa2e1cb5566da3752a279197642ae7bd751c78968d77a49b1e53435515","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-01-27T03:15:57Z","title_canon_sha256":"b7100a2e610b0285eb5e9d7e136176fd5ff5c3ea669c7b92973545e2167b2ba5"},"schema_version":"1.0","source":{"id":"1101.5202","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1101.5202","created_at":"2026-05-18T02:03:21Z"},{"alias_kind":"arxiv_version","alias_value":"1101.5202v1","created_at":"2026-05-18T02:03:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1101.5202","created_at":"2026-05-18T02:03:21Z"},{"alias_kind":"pith_short_12","alias_value":"ORFHPVQJXAYW","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_16","alias_value":"ORFHPVQJXAYWOWI2","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_8","alias_value":"ORFHPVQJ","created_at":"2026-05-18T12:26:37Z"}],"graph_snapshots":[{"event_id":"sha256:38363728dc99b53b68e5ae911ed1e33c7446478bb864c50a5dffe6bca9a34629","target":"graph","created_at":"2026-05-18T02:03:21Z","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":"Millisecond pulsars are intrinsically very stable clocks and precise measurement of their observed pulse periods can be used to study a wide variety of astrophysical phenomena. In particular, observations of a large sample of millisecond pulsars at regular intervals, constituting a Pulsar Timing Array (PTA), can be used as a detector of low-frequency gravitational waves and to establish a standard of time independent of terrestrial atomic timescales. Three major timing array projects have been established: The European Pulsar Timing Array (EPTA), the North American pulsar timing array (NANOGra","authors_text":"R. N. Manchester","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-01-27T03:15:57Z","title":"Pulsar Timing Arrays and their Applications"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1101.5202","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:fd3da9076c0300932ce95e6af2c40412abfefda6ae9c0b71e534cebcb6ad9ec6","target":"record","created_at":"2026-05-18T02:03:21Z","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":"6521bbfa2e1cb5566da3752a279197642ae7bd751c78968d77a49b1e53435515","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-01-27T03:15:57Z","title_canon_sha256":"b7100a2e610b0285eb5e9d7e136176fd5ff5c3ea669c7b92973545e2167b2ba5"},"schema_version":"1.0","source":{"id":"1101.5202","kind":"arxiv","version":1}},"canonical_sha256":"744a77d609b83167591ae7f3fe49d54b8ba24299fa186e65704fb2376c096849","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"744a77d609b83167591ae7f3fe49d54b8ba24299fa186e65704fb2376c096849","first_computed_at":"2026-05-18T02:03:21.562169Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:03:21.562169Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WRS3b8pe2RhFRVwB8JJgsaKGVe4jpGFzOxD41pBnuq08xs/qEuiHASMUBoWqu7KQ7Z5I9wK/qZDGadxwFBnvAg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:03:21.562668Z","signed_message":"canonical_sha256_bytes"},"source_id":"1101.5202","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fd3da9076c0300932ce95e6af2c40412abfefda6ae9c0b71e534cebcb6ad9ec6","sha256:38363728dc99b53b68e5ae911ed1e33c7446478bb864c50a5dffe6bca9a34629"],"state_sha256":"a051b296004a0f30182bcde700cf6bb3f9aece3e8bf97fd1b0d4355288b157dc"}