{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:BVDFQNQ2JZQF4RSX2TTU4MFSA7","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":"cf39d46b30f306cef3f583580e3d9c74b1ff755613df3ed1e2775fe270990f85","cross_cats_sorted":["astro-ph"],"license":"","primary_cat":"gr-qc","submitted_at":"2007-01-16T19:56:35Z","title_canon_sha256":"f2554af979dde5f12a4e3c2926c3516dd3173170112beaa93dc7348d960040b4"},"schema_version":"1.0","source":{"id":"gr-qc/0701086","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"gr-qc/0701086","created_at":"2026-07-04T15:16:38Z"},{"alias_kind":"arxiv_version","alias_value":"gr-qc/0701086v2","created_at":"2026-07-04T15:16:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.gr-qc/0701086","created_at":"2026-07-04T15:16:38Z"},{"alias_kind":"pith_short_12","alias_value":"BVDFQNQ2JZQF","created_at":"2026-07-04T15:16:38Z"},{"alias_kind":"pith_short_16","alias_value":"BVDFQNQ2JZQF4RSX","created_at":"2026-07-04T15:16:38Z"},{"alias_kind":"pith_short_8","alias_value":"BVDFQNQ2","created_at":"2026-07-04T15:16:38Z"}],"graph_snapshots":[{"event_id":"sha256:5ec6ab0923782290fdfbb4f3147538a6f423d9b56f03635bfe73fa33c19ebf2e","target":"graph","created_at":"2026-07-04T15:16:38Z","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/gr-qc/0701086/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The ringdown phase following a binary black hole merger is usually assumed to be well described by a linear superposition of complex exponentials (quasinormal modes). In the strong-field conditions typical of a binary black hole merger, non-linear effects may produce mode coupling. Artificial mode coupling can also be induced by the black hole's rotation, if the radiation field is expanded in terms of spin-weighted spherical (rather than spheroidal) harmonics. Observing deviations from linear black hole perturbation theory requires optimal fitting techniques to extract ringdown parameters from","authors_text":"Emanuele Berti, Jose A. Gonzalez, Ulrich Sperhake, Vitor Cardoso","cross_cats":["astro-ph"],"headline":"","license":"","primary_cat":"gr-qc","submitted_at":"2007-01-16T19:56:35Z","title":"Mining information from binary black hole mergers: a comparison of estimation methods for complex exponentials in noise"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"gr-qc/0701086","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":"sha256:9c98c149b173ee161734a32345fad8654c2e3ec0aab15f33833c77215c98f387","target":"record","created_at":"2026-07-04T15:16:38Z","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":"cf39d46b30f306cef3f583580e3d9c74b1ff755613df3ed1e2775fe270990f85","cross_cats_sorted":["astro-ph"],"license":"","primary_cat":"gr-qc","submitted_at":"2007-01-16T19:56:35Z","title_canon_sha256":"f2554af979dde5f12a4e3c2926c3516dd3173170112beaa93dc7348d960040b4"},"schema_version":"1.0","source":{"id":"gr-qc/0701086","kind":"arxiv","version":2}},"canonical_sha256":"0d4658361a4e605e4657d4e74e30b207db6d9f7a944c69492af253b7ee3c61cf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0d4658361a4e605e4657d4e74e30b207db6d9f7a944c69492af253b7ee3c61cf","first_computed_at":"2026-07-04T15:16:38.303509Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:16:38.303509Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eKdfXiO/5SsJsqAoCwIzE2JxYX7LPAFTEQXYCNAtQEQHn1Mzqh7+rnRihkH0DG7D/JjjAOVD1awJg3GmhgL+DQ==","signature_status":"signed_v1","signed_at":"2026-07-04T15:16:38.304071Z","signed_message":"canonical_sha256_bytes"},"source_id":"gr-qc/0701086","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9c98c149b173ee161734a32345fad8654c2e3ec0aab15f33833c77215c98f387","sha256:5ec6ab0923782290fdfbb4f3147538a6f423d9b56f03635bfe73fa33c19ebf2e"],"state_sha256":"a52c738a3d50dacd5363dffe39f7f664aa9a4e0f3f43bacdf624aa9f3e133436"}