{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:RKOR6BKWZ4RWWYJJTQIDEZTO6E","short_pith_number":"pith:RKOR6BKW","canonical_record":{"source":{"id":"1711.00926","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-11-02T20:39:43Z","cross_cats_sorted":["astro-ph.GA","astro-ph.HE","hep-th"],"title_canon_sha256":"960510787873dbef033d9a3742a430fb9c856ca7560d1065e47372abd0915b15","abstract_canon_sha256":"2a7f1f963d11af86a7639baa45c00d98d41daacc7148304b634e10201e48a495"},"schema_version":"1.0"},"canonical_sha256":"8a9d1f0556cf236b61299c1032666ef12c702ab8bcd314c311e35b89f2225420","source":{"kind":"arxiv","id":"1711.00926","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.00926","created_at":"2026-05-18T00:14:11Z"},{"alias_kind":"arxiv_version","alias_value":"1711.00926v2","created_at":"2026-05-18T00:14:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.00926","created_at":"2026-05-18T00:14:11Z"},{"alias_kind":"pith_short_12","alias_value":"RKOR6BKWZ4RW","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_16","alias_value":"RKOR6BKWZ4RWWYJJ","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_8","alias_value":"RKOR6BKW","created_at":"2026-05-18T12:31:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:RKOR6BKWZ4RWWYJJTQIDEZTO6E","target":"record","payload":{"canonical_record":{"source":{"id":"1711.00926","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-11-02T20:39:43Z","cross_cats_sorted":["astro-ph.GA","astro-ph.HE","hep-th"],"title_canon_sha256":"960510787873dbef033d9a3742a430fb9c856ca7560d1065e47372abd0915b15","abstract_canon_sha256":"2a7f1f963d11af86a7639baa45c00d98d41daacc7148304b634e10201e48a495"},"schema_version":"1.0"},"canonical_sha256":"8a9d1f0556cf236b61299c1032666ef12c702ab8bcd314c311e35b89f2225420","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:14:11.151672Z","signature_b64":"RUCpMjgJx2FPqtLj2JhrOIVQzXAFfE2tZIPqAl7A4Nv6UJrWhYbEscjeA13plQA+fwBavlJehCqV0FLjmAYHAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8a9d1f0556cf236b61299c1032666ef12c702ab8bcd314c311e35b89f2225420","last_reissued_at":"2026-05-18T00:14:11.151174Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:14:11.151174Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1711.00926","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":"2026-05-18T00:14:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"91gxBUSLm+lFBHvd469uFAj87bwG7S1mxPlJRqd3EVAzMctZE9amWtweqYq2QpEwaBNt8k+0ZesMXnElyPbhAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T17:47:08.194363Z"},"content_sha256":"fc066a4534629216277c4906de4730157403021e326d07f461fbba03f631f342","schema_version":"1.0","event_id":"sha256:fc066a4534629216277c4906de4730157403021e326d07f461fbba03f631f342"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:RKOR6BKWZ4RWWYJJTQIDEZTO6E","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On choosing the start time of binary black hole ringdown","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA","astro-ph.HE","hep-th"],"primary_cat":"gr-qc","authors_text":"Duncan A. Brown, Maria Okounkova, Mark A. Scheel, Matthew Giesler, Saul A. Teukolsky, Stefan W. Ballmer, Swetha Bhagwat","submitted_at":"2017-11-02T20:39:43Z","abstract_excerpt":"The final stage of a binary black hole merger is ringdown, in which the system is described by a Kerr black hole with quasinormal mode perturbations. It is far from straightforward to identify the time at which the ringdown begins. Yet determining this time is important for precision tests of the general theory of relativity that compare an observed signal with quasinormal mode descriptions of the ringdown, such as tests of the no-hair theorem. We present an algorithmic method to analyze the choice of ringdown start time in the observed waveform. This method is based on determining how close t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.00926","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":"2026-05-18T00:14:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RFe2MBr9PvkBw8nuV1bknffP1YdhaAnhfuja1n2LiIhftSvbkNYbISjAQHFTiFZXbN9SVYN9SWBqyAOzKdE5BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T17:47:08.194720Z"},"content_sha256":"9a1b95c54b5bff391da862580870a6a2e181a781571e2613061ab6a8060087bf","schema_version":"1.0","event_id":"sha256:9a1b95c54b5bff391da862580870a6a2e181a781571e2613061ab6a8060087bf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RKOR6BKWZ4RWWYJJTQIDEZTO6E/bundle.json","state_url":"https://pith.science/pith/RKOR6BKWZ4RWWYJJTQIDEZTO6E/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RKOR6BKWZ4RWWYJJTQIDEZTO6E/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":"2026-05-21T17:47:08Z","links":{"resolver":"https://pith.science/pith/RKOR6BKWZ4RWWYJJTQIDEZTO6E","bundle":"https://pith.science/pith/RKOR6BKWZ4RWWYJJTQIDEZTO6E/bundle.json","state":"https://pith.science/pith/RKOR6BKWZ4RWWYJJTQIDEZTO6E/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RKOR6BKWZ4RWWYJJTQIDEZTO6E/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:RKOR6BKWZ4RWWYJJTQIDEZTO6E","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":"2a7f1f963d11af86a7639baa45c00d98d41daacc7148304b634e10201e48a495","cross_cats_sorted":["astro-ph.GA","astro-ph.HE","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-11-02T20:39:43Z","title_canon_sha256":"960510787873dbef033d9a3742a430fb9c856ca7560d1065e47372abd0915b15"},"schema_version":"1.0","source":{"id":"1711.00926","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.00926","created_at":"2026-05-18T00:14:11Z"},{"alias_kind":"arxiv_version","alias_value":"1711.00926v2","created_at":"2026-05-18T00:14:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.00926","created_at":"2026-05-18T00:14:11Z"},{"alias_kind":"pith_short_12","alias_value":"RKOR6BKWZ4RW","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_16","alias_value":"RKOR6BKWZ4RWWYJJ","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_8","alias_value":"RKOR6BKW","created_at":"2026-05-18T12:31:39Z"}],"graph_snapshots":[{"event_id":"sha256:9a1b95c54b5bff391da862580870a6a2e181a781571e2613061ab6a8060087bf","target":"graph","created_at":"2026-05-18T00:14:11Z","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":"The final stage of a binary black hole merger is ringdown, in which the system is described by a Kerr black hole with quasinormal mode perturbations. It is far from straightforward to identify the time at which the ringdown begins. Yet determining this time is important for precision tests of the general theory of relativity that compare an observed signal with quasinormal mode descriptions of the ringdown, such as tests of the no-hair theorem. We present an algorithmic method to analyze the choice of ringdown start time in the observed waveform. This method is based on determining how close t","authors_text":"Duncan A. Brown, Maria Okounkova, Mark A. Scheel, Matthew Giesler, Saul A. Teukolsky, Stefan W. Ballmer, Swetha Bhagwat","cross_cats":["astro-ph.GA","astro-ph.HE","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-11-02T20:39:43Z","title":"On choosing the start time of binary black hole ringdown"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.00926","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:fc066a4534629216277c4906de4730157403021e326d07f461fbba03f631f342","target":"record","created_at":"2026-05-18T00:14:11Z","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":"2a7f1f963d11af86a7639baa45c00d98d41daacc7148304b634e10201e48a495","cross_cats_sorted":["astro-ph.GA","astro-ph.HE","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-11-02T20:39:43Z","title_canon_sha256":"960510787873dbef033d9a3742a430fb9c856ca7560d1065e47372abd0915b15"},"schema_version":"1.0","source":{"id":"1711.00926","kind":"arxiv","version":2}},"canonical_sha256":"8a9d1f0556cf236b61299c1032666ef12c702ab8bcd314c311e35b89f2225420","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8a9d1f0556cf236b61299c1032666ef12c702ab8bcd314c311e35b89f2225420","first_computed_at":"2026-05-18T00:14:11.151174Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:14:11.151174Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RUCpMjgJx2FPqtLj2JhrOIVQzXAFfE2tZIPqAl7A4Nv6UJrWhYbEscjeA13plQA+fwBavlJehCqV0FLjmAYHAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:14:11.151672Z","signed_message":"canonical_sha256_bytes"},"source_id":"1711.00926","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fc066a4534629216277c4906de4730157403021e326d07f461fbba03f631f342","sha256:9a1b95c54b5bff391da862580870a6a2e181a781571e2613061ab6a8060087bf"],"state_sha256":"d2ab83e0ffc5822c4555c2f842ce9d916cd9b3edd4aa3f4e9d5f176d35c7735e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ViDbX+BaMfVAzc9xmN5bFGcHvFesZN/E6Lb8PowlJqlwT1HcJBii56LXRoSuMO3/atsOam487yy9ss2y/wq2Cw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-21T17:47:08.196738Z","bundle_sha256":"1ca199ff811884b9bc96e74b677e8ba71401815f1450d80c04da13a4502891b0"}}