{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:LT3HK25OVW6UHGGO56RPVMZNJA","short_pith_number":"pith:LT3HK25O","canonical_record":{"source":{"id":"1705.04107","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-05-11T10:53:51Z","cross_cats_sorted":[],"title_canon_sha256":"69141c679fd8f19a5a79b64e2480499430aeab17f552253ac4d19c3eb95e1802","abstract_canon_sha256":"af37337880b1245e6b9e651ffe6e9e8def59e26c90087139b63a925a4bed8d1f"},"schema_version":"1.0"},"canonical_sha256":"5cf6756baeadbd4398ceefa2fab32d4818a249d00d9ba254dcdf4b70a7fcba6e","source":{"kind":"arxiv","id":"1705.04107","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1705.04107","created_at":"2026-05-18T00:36:03Z"},{"alias_kind":"arxiv_version","alias_value":"1705.04107v3","created_at":"2026-05-18T00:36:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.04107","created_at":"2026-05-18T00:36:03Z"},{"alias_kind":"pith_short_12","alias_value":"LT3HK25OVW6U","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_16","alias_value":"LT3HK25OVW6UHGGO","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_8","alias_value":"LT3HK25O","created_at":"2026-05-18T12:31:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:LT3HK25OVW6UHGGO56RPVMZNJA","target":"record","payload":{"canonical_record":{"source":{"id":"1705.04107","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-05-11T10:53:51Z","cross_cats_sorted":[],"title_canon_sha256":"69141c679fd8f19a5a79b64e2480499430aeab17f552253ac4d19c3eb95e1802","abstract_canon_sha256":"af37337880b1245e6b9e651ffe6e9e8def59e26c90087139b63a925a4bed8d1f"},"schema_version":"1.0"},"canonical_sha256":"5cf6756baeadbd4398ceefa2fab32d4818a249d00d9ba254dcdf4b70a7fcba6e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:36:03.244972Z","signature_b64":"E3PIZ5zKIg6gvn/JBTUNa3VBma3SvymyRZK859FsQ7ZizmtP169nvu0p67ZgidHVnmIAuaPk7weww0fUEGqaDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5cf6756baeadbd4398ceefa2fab32d4818a249d00d9ba254dcdf4b70a7fcba6e","last_reissued_at":"2026-05-18T00:36:03.244542Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:36:03.244542Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1705.04107","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:36:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uZQZ7ndSItWySFxK5XfpvYDMOnzwoiZGQ4+G3ixjA6HMjQqjiKZwvrbUrA88kXfXIDJHIAgsd3ZYeuLueJjzDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T03:13:36.670492Z"},"content_sha256":"430d74d505b08e278cd4f2ea2653893ad7126797fec77adcfef8f2b0e68bba37","schema_version":"1.0","event_id":"sha256:430d74d505b08e278cd4f2ea2653893ad7126797fec77adcfef8f2b0e68bba37"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:LT3HK25OVW6UHGGO56RPVMZNJA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Estimation of starting times of quasinormal modes in ringdown gravitational waves with the Hilbert-Huang transform","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Hirotaka Takahashi, Hiroyuki Nakano, Kazuki Sakai, Ken-ichi Oohara, Masato Kaneyama","submitted_at":"2017-05-11T10:53:51Z","abstract_excerpt":"It is known that a quasinormal mode (QNM) of a remnant black hole dominates a ringdown gravitational wave (GW) in a binary black hole (BBH) merger. To study properties of the QNMs, it is important to determine the time when the QNMs appear in a GW signal as well as to calculate its frequency and amplitude. In this paper, we propose a new method of estimating the starting time of the QNM and calculating the QNM frequency and amplitude of BBH GWs. We apply it to simulated merger waveforms by numerical relativity and the observed data of GW150914. The results show that the obtained QNM frequencie"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.04107","kind":"arxiv","version":3},"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":"2026-05-18T00:36:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"z9ydNaTU5ZJlBzwP/3QpDN6xDrG2hh6XLurYZ5YO+rji+Xf5MNO46/KCP//zMMGQATx94s7ceLko+01eLWfyAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T03:13:36.670833Z"},"content_sha256":"63c5b6cc51aa5d20bda88c8c7d842025b7ce09cca4fdb8cb3510c945f742a7bb","schema_version":"1.0","event_id":"sha256:63c5b6cc51aa5d20bda88c8c7d842025b7ce09cca4fdb8cb3510c945f742a7bb"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LT3HK25OVW6UHGGO56RPVMZNJA/bundle.json","state_url":"https://pith.science/pith/LT3HK25OVW6UHGGO56RPVMZNJA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LT3HK25OVW6UHGGO56RPVMZNJA/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":"2026-06-03T03:13:36Z","links":{"resolver":"https://pith.science/pith/LT3HK25OVW6UHGGO56RPVMZNJA","bundle":"https://pith.science/pith/LT3HK25OVW6UHGGO56RPVMZNJA/bundle.json","state":"https://pith.science/pith/LT3HK25OVW6UHGGO56RPVMZNJA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LT3HK25OVW6UHGGO56RPVMZNJA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:LT3HK25OVW6UHGGO56RPVMZNJA","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":"af37337880b1245e6b9e651ffe6e9e8def59e26c90087139b63a925a4bed8d1f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-05-11T10:53:51Z","title_canon_sha256":"69141c679fd8f19a5a79b64e2480499430aeab17f552253ac4d19c3eb95e1802"},"schema_version":"1.0","source":{"id":"1705.04107","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1705.04107","created_at":"2026-05-18T00:36:03Z"},{"alias_kind":"arxiv_version","alias_value":"1705.04107v3","created_at":"2026-05-18T00:36:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.04107","created_at":"2026-05-18T00:36:03Z"},{"alias_kind":"pith_short_12","alias_value":"LT3HK25OVW6U","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_16","alias_value":"LT3HK25OVW6UHGGO","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_8","alias_value":"LT3HK25O","created_at":"2026-05-18T12:31:28Z"}],"graph_snapshots":[{"event_id":"sha256:63c5b6cc51aa5d20bda88c8c7d842025b7ce09cca4fdb8cb3510c945f742a7bb","target":"graph","created_at":"2026-05-18T00:36:03Z","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":"It is known that a quasinormal mode (QNM) of a remnant black hole dominates a ringdown gravitational wave (GW) in a binary black hole (BBH) merger. To study properties of the QNMs, it is important to determine the time when the QNMs appear in a GW signal as well as to calculate its frequency and amplitude. In this paper, we propose a new method of estimating the starting time of the QNM and calculating the QNM frequency and amplitude of BBH GWs. We apply it to simulated merger waveforms by numerical relativity and the observed data of GW150914. The results show that the obtained QNM frequencie","authors_text":"Hirotaka Takahashi, Hiroyuki Nakano, Kazuki Sakai, Ken-ichi Oohara, Masato Kaneyama","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-05-11T10:53:51Z","title":"Estimation of starting times of quasinormal modes in ringdown gravitational waves with the Hilbert-Huang transform"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.04107","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":"sha256:430d74d505b08e278cd4f2ea2653893ad7126797fec77adcfef8f2b0e68bba37","target":"record","created_at":"2026-05-18T00:36:03Z","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":"af37337880b1245e6b9e651ffe6e9e8def59e26c90087139b63a925a4bed8d1f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-05-11T10:53:51Z","title_canon_sha256":"69141c679fd8f19a5a79b64e2480499430aeab17f552253ac4d19c3eb95e1802"},"schema_version":"1.0","source":{"id":"1705.04107","kind":"arxiv","version":3}},"canonical_sha256":"5cf6756baeadbd4398ceefa2fab32d4818a249d00d9ba254dcdf4b70a7fcba6e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5cf6756baeadbd4398ceefa2fab32d4818a249d00d9ba254dcdf4b70a7fcba6e","first_computed_at":"2026-05-18T00:36:03.244542Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:36:03.244542Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"E3PIZ5zKIg6gvn/JBTUNa3VBma3SvymyRZK859FsQ7ZizmtP169nvu0p67ZgidHVnmIAuaPk7weww0fUEGqaDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:36:03.244972Z","signed_message":"canonical_sha256_bytes"},"source_id":"1705.04107","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:430d74d505b08e278cd4f2ea2653893ad7126797fec77adcfef8f2b0e68bba37","sha256:63c5b6cc51aa5d20bda88c8c7d842025b7ce09cca4fdb8cb3510c945f742a7bb"],"state_sha256":"84a85888787e3ea17ed3d410d50e1fbda664e68fd2d674b8bcbdc62e54e851e6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FA4m2J1bSy9fLLumUx9DqbBkTa9mr5m09S/hSiMsnBtvxhyMz0QtxWRDdTDaiooQn1CU8H7MaNlz06KyC/sADg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T03:13:36.672745Z","bundle_sha256":"a0a08198c327fc201b9bd511c3c06b8a3de779fb41d43ba644079547bfad5ac7"}}