{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:NCBPZZYXPZL4QHSCEDKW4F4PQD","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":"34f853bb4c0027fec19eaf61d8c8e37a02cae2f31f95ae0e066c38dff14e0a8d","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2020-08-28T14:02:30Z","title_canon_sha256":"dc16f38b9d0797b0751f236ab60b910b81fcc00c033c76e68ebe5919b230d8a9"},"schema_version":"1.0","source":{"id":"2008.12663","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2008.12663","created_at":"2026-07-05T01:56:31Z"},{"alias_kind":"arxiv_version","alias_value":"2008.12663v3","created_at":"2026-07-05T01:56:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2008.12663","created_at":"2026-07-05T01:56:31Z"},{"alias_kind":"pith_short_12","alias_value":"NCBPZZYXPZL4","created_at":"2026-07-05T01:56:31Z"},{"alias_kind":"pith_short_16","alias_value":"NCBPZZYXPZL4QHSC","created_at":"2026-07-05T01:56:31Z"},{"alias_kind":"pith_short_8","alias_value":"NCBPZZYX","created_at":"2026-07-05T01:56:31Z"}],"graph_snapshots":[{"event_id":"sha256:defc5d8bbe31ce3faf1bc906b9e12aa32f912ed04c5e4960cfc936f23ac85fb9","target":"graph","created_at":"2026-07-05T01:56:31Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2008.12663/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We adopt the Pearson cross-correlation measure to analyze the LIGO Hanford and LIGO Livingston detector data streams around the events GW150914, GW151012,GW151226 and GW170104. We find that the Pearson cross-correlation method is sensitive to these signals, with correlations peaking when the black hole binaries reconstructed by the LIGO Scientific and Virgo Collaborations, are merging. We compare the obtained cross-correlations with the statistical correlation fluctuations arising in simulated Gaussian noise data and in LIGO data at times when no event is claimed. Our results for the significa","authors_text":"Alex B. Nielsen, Felicia Fredriksson, Germano Nardini, Paolo Marcoccia","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2020-08-28T14:02:30Z","title":"Pearson cross-correlation in the first four black hole binary mergers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2008.12663","kind":"arxiv","version":3},"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":"sha256:2971c6fdfbab798416a67a4c5ed0c7155b75bbc8fb407d294856488fc65c5309","target":"record","created_at":"2026-07-05T01:56:31Z","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":"34f853bb4c0027fec19eaf61d8c8e37a02cae2f31f95ae0e066c38dff14e0a8d","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2020-08-28T14:02:30Z","title_canon_sha256":"dc16f38b9d0797b0751f236ab60b910b81fcc00c033c76e68ebe5919b230d8a9"},"schema_version":"1.0","source":{"id":"2008.12663","kind":"arxiv","version":3}},"canonical_sha256":"6882fce7177e57c81e4220d56e178f80e05d10c252e02c5272f26935524e4701","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6882fce7177e57c81e4220d56e178f80e05d10c252e02c5272f26935524e4701","first_computed_at":"2026-07-05T01:56:31.363892Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:56:31.363892Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"q5sDy2JwEP3ybdPKwTABaKIIPeNcnoLvqf0woxPT7HcgZDK7WO43JmFFXQcipkqtMfKFwFPh3ONoOIFTPttrAA==","signature_status":"signed_v1","signed_at":"2026-07-05T01:56:31.364294Z","signed_message":"canonical_sha256_bytes"},"source_id":"2008.12663","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2971c6fdfbab798416a67a4c5ed0c7155b75bbc8fb407d294856488fc65c5309","sha256:defc5d8bbe31ce3faf1bc906b9e12aa32f912ed04c5e4960cfc936f23ac85fb9"],"state_sha256":"522bf4a83a9bde65a741182203bf8f08204739d050fbe82a8252fc151e9b1275"}