{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:UYPYS46654XA4XQL5Q6WGZWUPA","short_pith_number":"pith:UYPYS466","canonical_record":{"source":{"id":"1210.6014","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-10-22T19:37:12Z","cross_cats_sorted":["astro-ph.CO","gr-qc"],"title_canon_sha256":"64bf702c0a925ba8cdef463c0e193fb52da03dcfeeb600eeb3f6dc57873fd172","abstract_canon_sha256":"daaa60844a297d12ec335259b125184cefca964fd5a443d94750a5469777055b"},"schema_version":"1.0"},"canonical_sha256":"a61f8973deef2e0e5e0bec3d6366d4782934a6bb66357aa1f5b7c0bd3974bfd5","source":{"kind":"arxiv","id":"1210.6014","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.6014","created_at":"2026-05-18T03:31:16Z"},{"alias_kind":"arxiv_version","alias_value":"1210.6014v2","created_at":"2026-05-18T03:31:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.6014","created_at":"2026-05-18T03:31:16Z"},{"alias_kind":"pith_short_12","alias_value":"UYPYS46654XA","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_16","alias_value":"UYPYS46654XA4XQL","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_8","alias_value":"UYPYS466","created_at":"2026-05-18T12:27:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:UYPYS46654XA4XQL5Q6WGZWUPA","target":"record","payload":{"canonical_record":{"source":{"id":"1210.6014","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-10-22T19:37:12Z","cross_cats_sorted":["astro-ph.CO","gr-qc"],"title_canon_sha256":"64bf702c0a925ba8cdef463c0e193fb52da03dcfeeb600eeb3f6dc57873fd172","abstract_canon_sha256":"daaa60844a297d12ec335259b125184cefca964fd5a443d94750a5469777055b"},"schema_version":"1.0"},"canonical_sha256":"a61f8973deef2e0e5e0bec3d6366d4782934a6bb66357aa1f5b7c0bd3974bfd5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:31:16.803011Z","signature_b64":"SFlfwNBIzb6V3EkQDyUl6QKkZBscJ16PU8mUqP9HavF68nt+FaKXwCi04zfoMGY0d9wNY/G1IS9EE35ovK/OBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a61f8973deef2e0e5e0bec3d6366d4782934a6bb66357aa1f5b7c0bd3974bfd5","last_reissued_at":"2026-05-18T03:31:16.802455Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:31:16.802455Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1210.6014","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:31:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZKGx+BlKj6M6WirBa9OFNDA7MInxZmj7GzzyKsluv7LeXI5bbmFdllGJzuUcsfp+D8F6YKn5h6zIfTH3V0jXDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T20:39:00.496779Z"},"content_sha256":"7d475085e40e0b1896cdc89061935e21ea7dd0f57548843145e9c43663ee5e87","schema_version":"1.0","event_id":"sha256:7d475085e40e0b1896cdc89061935e21ea7dd0f57548843145e9c43663ee5e87"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:UYPYS46654XA4XQL5Q6WGZWUPA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Weighing The Evidence For A Gravitational-Wave Background In The First International Pulsar Timing Array Data Challenge","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","gr-qc"],"primary_cat":"astro-ph.IM","authors_text":"Jonathan R. Gair, L. Lentati, Stephen R. Taylor","submitted_at":"2012-10-22T19:37:12Z","abstract_excerpt":"We describe an analysis of the First International Pulsar Timing Array Data Challenge. We employ a robust, unbiased Bayesian framework developed by van Haasteren to study the three Open and Closed datasets, testing various models for each dataset and using MultiNest to recover the evidence for the purposes of Bayesian model-selection. The parameter constraints of the favoured model are confirmed using an adaptive MCMC technique. Our results for Closed1 favoured a gravitational-wave background with strain amplitude at f=1 yr-1, A, of (1.1 +/- 0.1) x 10^{-14}, power spectral-index gamma=4.30 +/-"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.6014","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:31:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"luuBrrmGAt82nAW4qXANseMG03Y5zWWrDIdFbbssvkFSDMtc74BiRcFdKcrxgRbuVpc8dTTuChq7Uj7hO9cpBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T20:39:00.497131Z"},"content_sha256":"656361618fee9d00899a21e84dde6d9503804f1bd80a7f59992db13ddaf5e453","schema_version":"1.0","event_id":"sha256:656361618fee9d00899a21e84dde6d9503804f1bd80a7f59992db13ddaf5e453"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UYPYS46654XA4XQL5Q6WGZWUPA/bundle.json","state_url":"https://pith.science/pith/UYPYS46654XA4XQL5Q6WGZWUPA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UYPYS46654XA4XQL5Q6WGZWUPA/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-30T20:39:00Z","links":{"resolver":"https://pith.science/pith/UYPYS46654XA4XQL5Q6WGZWUPA","bundle":"https://pith.science/pith/UYPYS46654XA4XQL5Q6WGZWUPA/bundle.json","state":"https://pith.science/pith/UYPYS46654XA4XQL5Q6WGZWUPA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UYPYS46654XA4XQL5Q6WGZWUPA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:UYPYS46654XA4XQL5Q6WGZWUPA","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":"daaa60844a297d12ec335259b125184cefca964fd5a443d94750a5469777055b","cross_cats_sorted":["astro-ph.CO","gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-10-22T19:37:12Z","title_canon_sha256":"64bf702c0a925ba8cdef463c0e193fb52da03dcfeeb600eeb3f6dc57873fd172"},"schema_version":"1.0","source":{"id":"1210.6014","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.6014","created_at":"2026-05-18T03:31:16Z"},{"alias_kind":"arxiv_version","alias_value":"1210.6014v2","created_at":"2026-05-18T03:31:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.6014","created_at":"2026-05-18T03:31:16Z"},{"alias_kind":"pith_short_12","alias_value":"UYPYS46654XA","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_16","alias_value":"UYPYS46654XA4XQL","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_8","alias_value":"UYPYS466","created_at":"2026-05-18T12:27:25Z"}],"graph_snapshots":[{"event_id":"sha256:656361618fee9d00899a21e84dde6d9503804f1bd80a7f59992db13ddaf5e453","target":"graph","created_at":"2026-05-18T03:31:16Z","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":"We describe an analysis of the First International Pulsar Timing Array Data Challenge. We employ a robust, unbiased Bayesian framework developed by van Haasteren to study the three Open and Closed datasets, testing various models for each dataset and using MultiNest to recover the evidence for the purposes of Bayesian model-selection. The parameter constraints of the favoured model are confirmed using an adaptive MCMC technique. Our results for Closed1 favoured a gravitational-wave background with strain amplitude at f=1 yr-1, A, of (1.1 +/- 0.1) x 10^{-14}, power spectral-index gamma=4.30 +/-","authors_text":"Jonathan R. Gair, L. Lentati, Stephen R. Taylor","cross_cats":["astro-ph.CO","gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-10-22T19:37:12Z","title":"Weighing The Evidence For A Gravitational-Wave Background In The First International Pulsar Timing Array Data Challenge"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.6014","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":"sha256:7d475085e40e0b1896cdc89061935e21ea7dd0f57548843145e9c43663ee5e87","target":"record","created_at":"2026-05-18T03:31:16Z","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":"daaa60844a297d12ec335259b125184cefca964fd5a443d94750a5469777055b","cross_cats_sorted":["astro-ph.CO","gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-10-22T19:37:12Z","title_canon_sha256":"64bf702c0a925ba8cdef463c0e193fb52da03dcfeeb600eeb3f6dc57873fd172"},"schema_version":"1.0","source":{"id":"1210.6014","kind":"arxiv","version":2}},"canonical_sha256":"a61f8973deef2e0e5e0bec3d6366d4782934a6bb66357aa1f5b7c0bd3974bfd5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a61f8973deef2e0e5e0bec3d6366d4782934a6bb66357aa1f5b7c0bd3974bfd5","first_computed_at":"2026-05-18T03:31:16.802455Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:31:16.802455Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SFlfwNBIzb6V3EkQDyUl6QKkZBscJ16PU8mUqP9HavF68nt+FaKXwCi04zfoMGY0d9wNY/G1IS9EE35ovK/OBA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:31:16.803011Z","signed_message":"canonical_sha256_bytes"},"source_id":"1210.6014","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7d475085e40e0b1896cdc89061935e21ea7dd0f57548843145e9c43663ee5e87","sha256:656361618fee9d00899a21e84dde6d9503804f1bd80a7f59992db13ddaf5e453"],"state_sha256":"e5a45d27967b300c878aab3b13dbdadf4146114eefc0c50c033da7b7d52916ad"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qhhnNi++bvn8pSHNIUdiChXd1qqqf/OhSNMOFclhUmGw4t8LdS4aeusQAqgPHUi+EexlxymkUDhfQpYsR68DDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T20:39:00.499526Z","bundle_sha256":"ced0410bc5a74e9a4a4a856fccf7ac12cb056187af97d40c0669ae829ce5aefe"}}