{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:7YSFL4P43D7EU6PFOKSYBHVOIW","short_pith_number":"pith:7YSFL4P4","canonical_record":{"source":{"id":"1806.01881","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-06-05T18:27:24Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"73b2c3a9a1706e7b54a52843b5ba411431505c504c2624fc99017fd496edd158","abstract_canon_sha256":"013b33a04f2acd23f855ad1d96db8fa1e56008fc7a31228fbcf82936dfd5c269"},"schema_version":"1.0"},"canonical_sha256":"fe2455f1fcd8fe4a79e572a5809eae45acb15e34bca380d4d1bf9a9645560d40","source":{"kind":"arxiv","id":"1806.01881","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.01881","created_at":"2026-05-18T00:06:59Z"},{"alias_kind":"arxiv_version","alias_value":"1806.01881v2","created_at":"2026-05-18T00:06:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.01881","created_at":"2026-05-18T00:06:59Z"},{"alias_kind":"pith_short_12","alias_value":"7YSFL4P43D7E","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"7YSFL4P43D7EU6PF","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"7YSFL4P4","created_at":"2026-05-18T12:32:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:7YSFL4P43D7EU6PFOKSYBHVOIW","target":"record","payload":{"canonical_record":{"source":{"id":"1806.01881","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-06-05T18:27:24Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"73b2c3a9a1706e7b54a52843b5ba411431505c504c2624fc99017fd496edd158","abstract_canon_sha256":"013b33a04f2acd23f855ad1d96db8fa1e56008fc7a31228fbcf82936dfd5c269"},"schema_version":"1.0"},"canonical_sha256":"fe2455f1fcd8fe4a79e572a5809eae45acb15e34bca380d4d1bf9a9645560d40","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:06:59.441738Z","signature_b64":"gb9PMxagONEbcFCsctwolrhr/WXv9r6XWUOtwMUjjb3Bka/bv3L5Avg8fgQkmlbBA+Q6eMECE4wrl9PAL4spDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fe2455f1fcd8fe4a79e572a5809eae45acb15e34bca380d4d1bf9a9645560d40","last_reissued_at":"2026-05-18T00:06:59.441124Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:06:59.441124Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1806.01881","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":"2026-05-18T00:06:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BzNL9ETMFD1CGgf58uta0ex8/j0hV9DQ2RuDyZdph7lFr6nw3PxFj1VtxlPDygPqmqxr1B4Ao4aE5B7x5QJMAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T02:34:16.417638Z"},"content_sha256":"17b546f0938c7c5f70b48ea2410ee0c915207d0355ef0fca48eb439ea7420b83","schema_version":"1.0","event_id":"sha256:17b546f0938c7c5f70b48ea2410ee0c915207d0355ef0fca48eb439ea7420b83"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:7YSFL4P43D7EU6PFOKSYBHVOIW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Particle Swarm Optimization based search for gravitational waves from compact binary coalescences: performance improvements","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"astro-ph.IM","authors_text":"Marc E. Normandin, Soumya D. Mohanty, Thilina S. Weerathunga","submitted_at":"2018-06-05T18:27:24Z","abstract_excerpt":"While a fully-coherent all-sky search is known to be optimal for detecting signals from compact binary coalescences (CBCs), its high computational cost has limited current searches to less sensitive coincidence-based schemes. For a network of first generation GW detectors, it has been demonstrated that Particle Swarm Optimization (PSO) can reduce the computational cost of this search, in terms of the number of likelihood evaluations, by a factor of $\\approx 10$ compared to a grid-based optimizer.\n  Here, we extend the PSO-based search to a network of second generation detectors and present fur"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.01881","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":"2026-05-18T00:06:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WIG2gEXvt9OPP1yrtr77KWZuuyZrxzbo4vHJ9GzrNmkcBamlRnNFGWxAMOlXeVe5FXInUulPXZDInDRUf+pmAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T02:34:16.417986Z"},"content_sha256":"dbcf8f4759f5ff6168430918548c54832fa4ef9dfb630aef4d581126c0c4a782","schema_version":"1.0","event_id":"sha256:dbcf8f4759f5ff6168430918548c54832fa4ef9dfb630aef4d581126c0c4a782"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7YSFL4P43D7EU6PFOKSYBHVOIW/bundle.json","state_url":"https://pith.science/pith/7YSFL4P43D7EU6PFOKSYBHVOIW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7YSFL4P43D7EU6PFOKSYBHVOIW/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":"2026-06-02T02:34:16Z","links":{"resolver":"https://pith.science/pith/7YSFL4P43D7EU6PFOKSYBHVOIW","bundle":"https://pith.science/pith/7YSFL4P43D7EU6PFOKSYBHVOIW/bundle.json","state":"https://pith.science/pith/7YSFL4P43D7EU6PFOKSYBHVOIW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7YSFL4P43D7EU6PFOKSYBHVOIW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:7YSFL4P43D7EU6PFOKSYBHVOIW","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":"013b33a04f2acd23f855ad1d96db8fa1e56008fc7a31228fbcf82936dfd5c269","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-06-05T18:27:24Z","title_canon_sha256":"73b2c3a9a1706e7b54a52843b5ba411431505c504c2624fc99017fd496edd158"},"schema_version":"1.0","source":{"id":"1806.01881","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.01881","created_at":"2026-05-18T00:06:59Z"},{"alias_kind":"arxiv_version","alias_value":"1806.01881v2","created_at":"2026-05-18T00:06:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.01881","created_at":"2026-05-18T00:06:59Z"},{"alias_kind":"pith_short_12","alias_value":"7YSFL4P43D7E","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"7YSFL4P43D7EU6PF","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"7YSFL4P4","created_at":"2026-05-18T12:32:13Z"}],"graph_snapshots":[{"event_id":"sha256:dbcf8f4759f5ff6168430918548c54832fa4ef9dfb630aef4d581126c0c4a782","target":"graph","created_at":"2026-05-18T00:06:59Z","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":"While a fully-coherent all-sky search is known to be optimal for detecting signals from compact binary coalescences (CBCs), its high computational cost has limited current searches to less sensitive coincidence-based schemes. For a network of first generation GW detectors, it has been demonstrated that Particle Swarm Optimization (PSO) can reduce the computational cost of this search, in terms of the number of likelihood evaluations, by a factor of $\\approx 10$ compared to a grid-based optimizer.\n  Here, we extend the PSO-based search to a network of second generation detectors and present fur","authors_text":"Marc E. Normandin, Soumya D. Mohanty, Thilina S. Weerathunga","cross_cats":["gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-06-05T18:27:24Z","title":"Particle Swarm Optimization based search for gravitational waves from compact binary coalescences: performance improvements"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.01881","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":"sha256:17b546f0938c7c5f70b48ea2410ee0c915207d0355ef0fca48eb439ea7420b83","target":"record","created_at":"2026-05-18T00:06:59Z","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":"013b33a04f2acd23f855ad1d96db8fa1e56008fc7a31228fbcf82936dfd5c269","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-06-05T18:27:24Z","title_canon_sha256":"73b2c3a9a1706e7b54a52843b5ba411431505c504c2624fc99017fd496edd158"},"schema_version":"1.0","source":{"id":"1806.01881","kind":"arxiv","version":2}},"canonical_sha256":"fe2455f1fcd8fe4a79e572a5809eae45acb15e34bca380d4d1bf9a9645560d40","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fe2455f1fcd8fe4a79e572a5809eae45acb15e34bca380d4d1bf9a9645560d40","first_computed_at":"2026-05-18T00:06:59.441124Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:06:59.441124Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gb9PMxagONEbcFCsctwolrhr/WXv9r6XWUOtwMUjjb3Bka/bv3L5Avg8fgQkmlbBA+Q6eMECE4wrl9PAL4spDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:06:59.441738Z","signed_message":"canonical_sha256_bytes"},"source_id":"1806.01881","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:17b546f0938c7c5f70b48ea2410ee0c915207d0355ef0fca48eb439ea7420b83","sha256:dbcf8f4759f5ff6168430918548c54832fa4ef9dfb630aef4d581126c0c4a782"],"state_sha256":"ec29f624838959216886ed0be35eaf7515c41b296afd5da9b6cb4f4491db6777"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6LLi2Bkx5rw+f8nE61B+Hp+38V2i+RSoF2u3VK0xnXfH0KySxbz15crX0vgxSkTDCOZBXUNzaFYaiI96cfAGDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T02:34:16.419912Z","bundle_sha256":"3eeb26186c710548429019777e3071611720cef712ffee868755d829d5202dc3"}}