{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:UXTZ3AUBHJZ2N7E6HH63NYSRQ2","short_pith_number":"pith:UXTZ3AUB","canonical_record":{"source":{"id":"1210.2396","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-10-08T20:00:03Z","cross_cats_sorted":[],"title_canon_sha256":"f5cb180022ed08a6aedfc2cdd5dfd2476aaad419beceab3904d87a5f240c90bd","abstract_canon_sha256":"a71cb4bc2b251f4643eb7b5f568e0760a4addded52f38e06b825c0d92242b20a"},"schema_version":"1.0"},"canonical_sha256":"a5e79d82813a73a6fc9e39fdb6e25186b880fdfeb3f417c1e1e5c3b83b57ba81","source":{"kind":"arxiv","id":"1210.2396","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.2396","created_at":"2026-05-18T01:54:04Z"},{"alias_kind":"arxiv_version","alias_value":"1210.2396v1","created_at":"2026-05-18T01:54:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.2396","created_at":"2026-05-18T01:54:04Z"},{"alias_kind":"pith_short_12","alias_value":"UXTZ3AUBHJZ2","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_16","alias_value":"UXTZ3AUBHJZ2N7E6","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_8","alias_value":"UXTZ3AUB","created_at":"2026-05-18T12:27:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:UXTZ3AUBHJZ2N7E6HH63NYSRQ2","target":"record","payload":{"canonical_record":{"source":{"id":"1210.2396","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-10-08T20:00:03Z","cross_cats_sorted":[],"title_canon_sha256":"f5cb180022ed08a6aedfc2cdd5dfd2476aaad419beceab3904d87a5f240c90bd","abstract_canon_sha256":"a71cb4bc2b251f4643eb7b5f568e0760a4addded52f38e06b825c0d92242b20a"},"schema_version":"1.0"},"canonical_sha256":"a5e79d82813a73a6fc9e39fdb6e25186b880fdfeb3f417c1e1e5c3b83b57ba81","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:54:04.404144Z","signature_b64":"uNO24anL2hFGXXl3bAeOw4S0CJXQ1cBMJLVkhkC6f5yCQCtcwBQ9ps3/HusvUwjLobobMoLxtIRPDLWe8bARAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a5e79d82813a73a6fc9e39fdb6e25186b880fdfeb3f417c1e1e5c3b83b57ba81","last_reissued_at":"2026-05-18T01:54:04.403677Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:54:04.403677Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1210.2396","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":"2026-05-18T01:54:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QsDI3C8HslKb1fP1pwZ80vRzyFA4AaF0Nx0XoFVAuTaVe5m8jF7su4hbVTggzLLIAcmpOafcjfcahum9Ar4dDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T09:25:39.956904Z"},"content_sha256":"d450d28b6b9180e5f5b7e601499c356fcc8d6bfbcd02fc1733c0be736935febd","schema_version":"1.0","event_id":"sha256:d450d28b6b9180e5f5b7e601499c356fcc8d6bfbcd02fc1733c0be736935febd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:UXTZ3AUBHJZ2N7E6HH63NYSRQ2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Resolving multiple supermassive black hole binaries with pulsar timing arrays II: genetic algorithm implementation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Alberto Sesana, Antoine Petiteau, Mariana de Araujo, Stanislav Babak","submitted_at":"2012-10-08T20:00:03Z","abstract_excerpt":"Pulsar timing arrays (PTAs) might detect gravitational waves (GWs) from massive black hole (MBH) binaries within this decade. The signal is expected to be an incoherent superposition of several nearly-monochromatic waves of different strength. The brightest sources might be individually resolved, and the overall deconvolved, at least partially, in its individual components. In this paper we extend the maximum-likelihood based method developed in Babak & Sesana 2012, to search for individual MBH binaries in PTA data. We model the signal as a collection of circular monochromatic binaries, each c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.2396","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":"2026-05-18T01:54:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"abBNC5nagq4apLcrgBTuWLD3kCR67fRdqaLKQI2hQapqJhMzW5V7wBwIB5cBdVB57UL/mBb4Ob80aHFW6WXvDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T09:25:39.957786Z"},"content_sha256":"8da53531b96a49747475b04ea455641c0713b6c4a2dae7d361d42dbbe7b683e8","schema_version":"1.0","event_id":"sha256:8da53531b96a49747475b04ea455641c0713b6c4a2dae7d361d42dbbe7b683e8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UXTZ3AUBHJZ2N7E6HH63NYSRQ2/bundle.json","state_url":"https://pith.science/pith/UXTZ3AUBHJZ2N7E6HH63NYSRQ2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UXTZ3AUBHJZ2N7E6HH63NYSRQ2/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":"2026-05-31T09:25:39Z","links":{"resolver":"https://pith.science/pith/UXTZ3AUBHJZ2N7E6HH63NYSRQ2","bundle":"https://pith.science/pith/UXTZ3AUBHJZ2N7E6HH63NYSRQ2/bundle.json","state":"https://pith.science/pith/UXTZ3AUBHJZ2N7E6HH63NYSRQ2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UXTZ3AUBHJZ2N7E6HH63NYSRQ2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:UXTZ3AUBHJZ2N7E6HH63NYSRQ2","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":"a71cb4bc2b251f4643eb7b5f568e0760a4addded52f38e06b825c0d92242b20a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-10-08T20:00:03Z","title_canon_sha256":"f5cb180022ed08a6aedfc2cdd5dfd2476aaad419beceab3904d87a5f240c90bd"},"schema_version":"1.0","source":{"id":"1210.2396","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.2396","created_at":"2026-05-18T01:54:04Z"},{"alias_kind":"arxiv_version","alias_value":"1210.2396v1","created_at":"2026-05-18T01:54:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.2396","created_at":"2026-05-18T01:54:04Z"},{"alias_kind":"pith_short_12","alias_value":"UXTZ3AUBHJZ2","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_16","alias_value":"UXTZ3AUBHJZ2N7E6","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_8","alias_value":"UXTZ3AUB","created_at":"2026-05-18T12:27:25Z"}],"graph_snapshots":[{"event_id":"sha256:8da53531b96a49747475b04ea455641c0713b6c4a2dae7d361d42dbbe7b683e8","target":"graph","created_at":"2026-05-18T01:54:04Z","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 (PTAs) might detect gravitational waves (GWs) from massive black hole (MBH) binaries within this decade. The signal is expected to be an incoherent superposition of several nearly-monochromatic waves of different strength. The brightest sources might be individually resolved, and the overall deconvolved, at least partially, in its individual components. In this paper we extend the maximum-likelihood based method developed in Babak & Sesana 2012, to search for individual MBH binaries in PTA data. We model the signal as a collection of circular monochromatic binaries, each c","authors_text":"Alberto Sesana, Antoine Petiteau, Mariana de Araujo, Stanislav Babak","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-10-08T20:00:03Z","title":"Resolving multiple supermassive black hole binaries with pulsar timing arrays II: genetic algorithm implementation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.2396","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:d450d28b6b9180e5f5b7e601499c356fcc8d6bfbcd02fc1733c0be736935febd","target":"record","created_at":"2026-05-18T01:54:04Z","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":"a71cb4bc2b251f4643eb7b5f568e0760a4addded52f38e06b825c0d92242b20a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-10-08T20:00:03Z","title_canon_sha256":"f5cb180022ed08a6aedfc2cdd5dfd2476aaad419beceab3904d87a5f240c90bd"},"schema_version":"1.0","source":{"id":"1210.2396","kind":"arxiv","version":1}},"canonical_sha256":"a5e79d82813a73a6fc9e39fdb6e25186b880fdfeb3f417c1e1e5c3b83b57ba81","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a5e79d82813a73a6fc9e39fdb6e25186b880fdfeb3f417c1e1e5c3b83b57ba81","first_computed_at":"2026-05-18T01:54:04.403677Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:54:04.403677Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uNO24anL2hFGXXl3bAeOw4S0CJXQ1cBMJLVkhkC6f5yCQCtcwBQ9ps3/HusvUwjLobobMoLxtIRPDLWe8bARAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:54:04.404144Z","signed_message":"canonical_sha256_bytes"},"source_id":"1210.2396","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d450d28b6b9180e5f5b7e601499c356fcc8d6bfbcd02fc1733c0be736935febd","sha256:8da53531b96a49747475b04ea455641c0713b6c4a2dae7d361d42dbbe7b683e8"],"state_sha256":"256e2bde5c21a6c1cb746254c9d5737ecb467baad828a3ffdec61fc9405b41e5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Dag0kgJe8UJMTAfknCYETZPgBKssi2rToj1j/sv8/4hJzucdDyWEhV6bxvyPw1/t4ZoQCbfUXaknDD4kHgviDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T09:25:39.962429Z","bundle_sha256":"78d77e257840a95608387da87a796afb129988212ded6feead4d8c1ef7dac97c"}}