{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:4AYFHCMLMCNAILAWJKY7UJRW4S","short_pith_number":"pith:4AYFHCML","canonical_record":{"source":{"id":"1107.5366","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-07-27T01:39:47Z","cross_cats_sorted":[],"title_canon_sha256":"9d66f1adb1f038afc147d7d6ef42dfefb855563ad5487c3da481888c6c40cf95","abstract_canon_sha256":"ec6e6760efae0b6cc908cdbb47aac2b03c86d72740c40bc014a4269261543b93"},"schema_version":"1.0"},"canonical_sha256":"e03053898b609a042c164ab1fa2636e4ac18754b830870dc741db5c9038368f6","source":{"kind":"arxiv","id":"1107.5366","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1107.5366","created_at":"2026-05-18T02:01:09Z"},{"alias_kind":"arxiv_version","alias_value":"1107.5366v1","created_at":"2026-05-18T02:01:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1107.5366","created_at":"2026-05-18T02:01:09Z"},{"alias_kind":"pith_short_12","alias_value":"4AYFHCMLMCNA","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_16","alias_value":"4AYFHCMLMCNAILAW","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_8","alias_value":"4AYFHCML","created_at":"2026-05-18T12:26:20Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:4AYFHCMLMCNAILAWJKY7UJRW4S","target":"record","payload":{"canonical_record":{"source":{"id":"1107.5366","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-07-27T01:39:47Z","cross_cats_sorted":[],"title_canon_sha256":"9d66f1adb1f038afc147d7d6ef42dfefb855563ad5487c3da481888c6c40cf95","abstract_canon_sha256":"ec6e6760efae0b6cc908cdbb47aac2b03c86d72740c40bc014a4269261543b93"},"schema_version":"1.0"},"canonical_sha256":"e03053898b609a042c164ab1fa2636e4ac18754b830870dc741db5c9038368f6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:01:09.286824Z","signature_b64":"F1mOu/UuFIuOom5rcwVdPUA3mEwV1T47zuG75trJ1bwlC/3qK8LpQ54Yw6+GiU7AB3YfK1vpbS06sAf4ZpCnCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e03053898b609a042c164ab1fa2636e4ac18754b830870dc741db5c9038368f6","last_reissued_at":"2026-05-18T02:01:09.286266Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:01:09.286266Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1107.5366","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:01:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Vf+sC2QK1s47prujUC5wZHCX1quOs31fYOf8vor3yxGAyXWo3cfKmKlLHr0h1sq4klzFcR2jAS69bwh1HazpBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T18:07:48.370508Z"},"content_sha256":"904b88aba471c9502f11c580f6f3d60372a27ac0560bad1edf42a67a83aac5e0","schema_version":"1.0","event_id":"sha256:904b88aba471c9502f11c580f6f3d60372a27ac0560bad1edf42a67a83aac5e0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:4AYFHCMLMCNAILAWJKY7UJRW4S","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Pulsar timing analysis in the presence of correlated noise","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"D. J. Champion, G. Hobbs, J. P. W. Verbiest, R. N. Manchester, W. Coles","submitted_at":"2011-07-27T01:39:47Z","abstract_excerpt":"Pulsar timing observations are usually analysed with least-square-fitting procedures under the assumption that the timing residuals are uncorrelated (statistically \"white\"). Pulsar observers are well aware that this assumption often breaks down and causes severe errors in estimating the parameters of the timing model and their uncertainties. Ad hoc methods for minimizing these errors have been developed, but we show that they are far from optimal. Compensation for temporal correlation can be done optimally if the covariance matrix of the residuals is known using a linear transformation that wh"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1107.5366","kind":"arxiv","version":1},"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":"2026-05-18T02:01:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"X6Ywwo5vejMHB5QArYKAuICFVNDjX8jWnfyUL0bi10+7DmFZTaiCH/ccA3RJkpmyOO64fm0ChAlEF3xAhb8lBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T18:07:48.370849Z"},"content_sha256":"718967dd086bad2a4bbbc01333e7b222450ee9a02cff3ec3348262b3bfb02316","schema_version":"1.0","event_id":"sha256:718967dd086bad2a4bbbc01333e7b222450ee9a02cff3ec3348262b3bfb02316"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4AYFHCMLMCNAILAWJKY7UJRW4S/bundle.json","state_url":"https://pith.science/pith/4AYFHCMLMCNAILAWJKY7UJRW4S/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4AYFHCMLMCNAILAWJKY7UJRW4S/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":"2026-05-20T18:07:48Z","links":{"resolver":"https://pith.science/pith/4AYFHCMLMCNAILAWJKY7UJRW4S","bundle":"https://pith.science/pith/4AYFHCMLMCNAILAWJKY7UJRW4S/bundle.json","state":"https://pith.science/pith/4AYFHCMLMCNAILAWJKY7UJRW4S/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4AYFHCMLMCNAILAWJKY7UJRW4S/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:4AYFHCMLMCNAILAWJKY7UJRW4S","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":"ec6e6760efae0b6cc908cdbb47aac2b03c86d72740c40bc014a4269261543b93","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-07-27T01:39:47Z","title_canon_sha256":"9d66f1adb1f038afc147d7d6ef42dfefb855563ad5487c3da481888c6c40cf95"},"schema_version":"1.0","source":{"id":"1107.5366","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1107.5366","created_at":"2026-05-18T02:01:09Z"},{"alias_kind":"arxiv_version","alias_value":"1107.5366v1","created_at":"2026-05-18T02:01:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1107.5366","created_at":"2026-05-18T02:01:09Z"},{"alias_kind":"pith_short_12","alias_value":"4AYFHCMLMCNA","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_16","alias_value":"4AYFHCMLMCNAILAW","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_8","alias_value":"4AYFHCML","created_at":"2026-05-18T12:26:20Z"}],"graph_snapshots":[{"event_id":"sha256:718967dd086bad2a4bbbc01333e7b222450ee9a02cff3ec3348262b3bfb02316","target":"graph","created_at":"2026-05-18T02:01:09Z","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 observations are usually analysed with least-square-fitting procedures under the assumption that the timing residuals are uncorrelated (statistically \"white\"). Pulsar observers are well aware that this assumption often breaks down and causes severe errors in estimating the parameters of the timing model and their uncertainties. Ad hoc methods for minimizing these errors have been developed, but we show that they are far from optimal. Compensation for temporal correlation can be done optimally if the covariance matrix of the residuals is known using a linear transformation that wh","authors_text":"D. J. Champion, G. Hobbs, J. P. W. Verbiest, R. N. Manchester, W. Coles","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-07-27T01:39:47Z","title":"Pulsar timing analysis in the presence of correlated noise"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1107.5366","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":"sha256:904b88aba471c9502f11c580f6f3d60372a27ac0560bad1edf42a67a83aac5e0","target":"record","created_at":"2026-05-18T02:01:09Z","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":"ec6e6760efae0b6cc908cdbb47aac2b03c86d72740c40bc014a4269261543b93","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-07-27T01:39:47Z","title_canon_sha256":"9d66f1adb1f038afc147d7d6ef42dfefb855563ad5487c3da481888c6c40cf95"},"schema_version":"1.0","source":{"id":"1107.5366","kind":"arxiv","version":1}},"canonical_sha256":"e03053898b609a042c164ab1fa2636e4ac18754b830870dc741db5c9038368f6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e03053898b609a042c164ab1fa2636e4ac18754b830870dc741db5c9038368f6","first_computed_at":"2026-05-18T02:01:09.286266Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:01:09.286266Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"F1mOu/UuFIuOom5rcwVdPUA3mEwV1T47zuG75trJ1bwlC/3qK8LpQ54Yw6+GiU7AB3YfK1vpbS06sAf4ZpCnCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:01:09.286824Z","signed_message":"canonical_sha256_bytes"},"source_id":"1107.5366","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:904b88aba471c9502f11c580f6f3d60372a27ac0560bad1edf42a67a83aac5e0","sha256:718967dd086bad2a4bbbc01333e7b222450ee9a02cff3ec3348262b3bfb02316"],"state_sha256":"8d37e5a2b447a06a4bfea4bdc665a68e67a938b3f603c82f5e46c838dc716cb5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vWtYVeEPfiTVfws8cPzMvALrFNhfklHhkVhJI3+hrAu+VoOu5S+zOuANDoUu8d+XKev0hFyB7bpM71GLo7osAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T18:07:48.372822Z","bundle_sha256":"23f55d0c28e856f8f98e43e376212504aeb7ce2f5d1317a0583cf1c936f57662"}}