{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:JPXQJGBOG43Q4CTMQHOGWT5SSP","short_pith_number":"pith:JPXQJGBO","canonical_record":{"source":{"id":"2104.12968","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2021-04-27T04:18:48Z","cross_cats_sorted":[],"title_canon_sha256":"e7ba7d40dfe57a84934e0fc4ac112119c16d9d8a7bab8d46e514a2fe54780def","abstract_canon_sha256":"f7e7b42e866c7523038fdb9857a48beacc2fd983782132b0456b953cc3a93bcd"},"schema_version":"1.0"},"canonical_sha256":"4bef04982e37370e0a6c81dc6b4fb293faa14a32261b85e8a9ac7b63f0770e98","source":{"kind":"arxiv","id":"2104.12968","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2104.12968","created_at":"2026-07-05T03:02:52Z"},{"alias_kind":"arxiv_version","alias_value":"2104.12968v2","created_at":"2026-07-05T03:02:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2104.12968","created_at":"2026-07-05T03:02:52Z"},{"alias_kind":"pith_short_12","alias_value":"JPXQJGBOG43Q","created_at":"2026-07-05T03:02:52Z"},{"alias_kind":"pith_short_16","alias_value":"JPXQJGBOG43Q4CTM","created_at":"2026-07-05T03:02:52Z"},{"alias_kind":"pith_short_8","alias_value":"JPXQJGBO","created_at":"2026-07-05T03:02:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:JPXQJGBOG43Q4CTMQHOGWT5SSP","target":"record","payload":{"canonical_record":{"source":{"id":"2104.12968","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2021-04-27T04:18:48Z","cross_cats_sorted":[],"title_canon_sha256":"e7ba7d40dfe57a84934e0fc4ac112119c16d9d8a7bab8d46e514a2fe54780def","abstract_canon_sha256":"f7e7b42e866c7523038fdb9857a48beacc2fd983782132b0456b953cc3a93bcd"},"schema_version":"1.0"},"canonical_sha256":"4bef04982e37370e0a6c81dc6b4fb293faa14a32261b85e8a9ac7b63f0770e98","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:02:52.123956Z","signature_b64":"eTBRTdVmmJgNTCDEu+cNXKLgEalbn3mmz82xfumz9EcOTydG6VrrichMBHQsVOVjPdT4NBgcXxbsXpeA+Rm1Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4bef04982e37370e0a6c81dc6b4fb293faa14a32261b85e8a9ac7b63f0770e98","last_reissued_at":"2026-07-05T03:02:52.123439Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:02:52.123439Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2104.12968","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":"2026-07-05T03:02:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"i7JkcxvIo8CZBszmWSO/kgwHpottHeNguH/ORidrorf3DZ94wyaLP9Fw2Waj5JKlrSoqmstaAG7RVt7sF7oKDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T12:10:34.185288Z"},"content_sha256":"cc5d3aceab3513265d8cb868892f47f0e528f0bd3245f83ab8b5eb1d6c1a18d9","schema_version":"1.0","event_id":"sha256:cc5d3aceab3513265d8cb868892f47f0e528f0bd3245f83ab8b5eb1d6c1a18d9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:JPXQJGBOG43Q4CTMQHOGWT5SSP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Prospects for estimating parameters from gravitational waves of superspinar binaries","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Nami Uchikata, Tatsuya Narikawa","submitted_at":"2021-04-27T04:18:48Z","abstract_excerpt":"To date, close to fifty presumed black hole binary mergers were observed by the LIGO and Virgo detectors. The analyses have been done with an assumption that these objects are black holes by limiting the spin prior to the Kerr bound. However, the above assumption is not valid for superspinars, which have the Kerr geometry but rotate beyond the Kerr bound. In this study, we investigate whether and how the limited spin prior range causes a bias in parameter estimation for superspinars if they are detected. To this end, we estimate binary parameters of the simulated inspiral signals of the gravit"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2104.12968","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2104.12968/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T03:02:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NdqgMtoPrFOXruo2ig+Zo0cWl6wiaZBOz/E7x8u3k1hpiSGnPwUVgCzjTKTQumUX7WB9fu24s/I/Oqjpl6tHBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T12:10:34.185794Z"},"content_sha256":"8978ded74e610d6f714211ecc022bccc6a5febaf2c9b32026a3295768754f45c","schema_version":"1.0","event_id":"sha256:8978ded74e610d6f714211ecc022bccc6a5febaf2c9b32026a3295768754f45c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JPXQJGBOG43Q4CTMQHOGWT5SSP/bundle.json","state_url":"https://pith.science/pith/JPXQJGBOG43Q4CTMQHOGWT5SSP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JPXQJGBOG43Q4CTMQHOGWT5SSP/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":"2026-08-16T12:10:34Z","links":{"resolver":"https://pith.science/pith/JPXQJGBOG43Q4CTMQHOGWT5SSP","bundle":"https://pith.science/pith/JPXQJGBOG43Q4CTMQHOGWT5SSP/bundle.json","state":"https://pith.science/pith/JPXQJGBOG43Q4CTMQHOGWT5SSP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JPXQJGBOG43Q4CTMQHOGWT5SSP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:JPXQJGBOG43Q4CTMQHOGWT5SSP","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":"f7e7b42e866c7523038fdb9857a48beacc2fd983782132b0456b953cc3a93bcd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2021-04-27T04:18:48Z","title_canon_sha256":"e7ba7d40dfe57a84934e0fc4ac112119c16d9d8a7bab8d46e514a2fe54780def"},"schema_version":"1.0","source":{"id":"2104.12968","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2104.12968","created_at":"2026-07-05T03:02:52Z"},{"alias_kind":"arxiv_version","alias_value":"2104.12968v2","created_at":"2026-07-05T03:02:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2104.12968","created_at":"2026-07-05T03:02:52Z"},{"alias_kind":"pith_short_12","alias_value":"JPXQJGBOG43Q","created_at":"2026-07-05T03:02:52Z"},{"alias_kind":"pith_short_16","alias_value":"JPXQJGBOG43Q4CTM","created_at":"2026-07-05T03:02:52Z"},{"alias_kind":"pith_short_8","alias_value":"JPXQJGBO","created_at":"2026-07-05T03:02:52Z"}],"graph_snapshots":[{"event_id":"sha256:8978ded74e610d6f714211ecc022bccc6a5febaf2c9b32026a3295768754f45c","target":"graph","created_at":"2026-07-05T03:02:52Z","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/2104.12968/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"To date, close to fifty presumed black hole binary mergers were observed by the LIGO and Virgo detectors. The analyses have been done with an assumption that these objects are black holes by limiting the spin prior to the Kerr bound. However, the above assumption is not valid for superspinars, which have the Kerr geometry but rotate beyond the Kerr bound. In this study, we investigate whether and how the limited spin prior range causes a bias in parameter estimation for superspinars if they are detected. To this end, we estimate binary parameters of the simulated inspiral signals of the gravit","authors_text":"Nami Uchikata, Tatsuya Narikawa","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2021-04-27T04:18:48Z","title":"Prospects for estimating parameters from gravitational waves of superspinar binaries"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2104.12968","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:cc5d3aceab3513265d8cb868892f47f0e528f0bd3245f83ab8b5eb1d6c1a18d9","target":"record","created_at":"2026-07-05T03:02:52Z","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":"f7e7b42e866c7523038fdb9857a48beacc2fd983782132b0456b953cc3a93bcd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2021-04-27T04:18:48Z","title_canon_sha256":"e7ba7d40dfe57a84934e0fc4ac112119c16d9d8a7bab8d46e514a2fe54780def"},"schema_version":"1.0","source":{"id":"2104.12968","kind":"arxiv","version":2}},"canonical_sha256":"4bef04982e37370e0a6c81dc6b4fb293faa14a32261b85e8a9ac7b63f0770e98","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4bef04982e37370e0a6c81dc6b4fb293faa14a32261b85e8a9ac7b63f0770e98","first_computed_at":"2026-07-05T03:02:52.123439Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:02:52.123439Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eTBRTdVmmJgNTCDEu+cNXKLgEalbn3mmz82xfumz9EcOTydG6VrrichMBHQsVOVjPdT4NBgcXxbsXpeA+Rm1Cg==","signature_status":"signed_v1","signed_at":"2026-07-05T03:02:52.123956Z","signed_message":"canonical_sha256_bytes"},"source_id":"2104.12968","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cc5d3aceab3513265d8cb868892f47f0e528f0bd3245f83ab8b5eb1d6c1a18d9","sha256:8978ded74e610d6f714211ecc022bccc6a5febaf2c9b32026a3295768754f45c"],"state_sha256":"5b263ed5da0df383255c14a5c4ff086b3ade8a4bdcbbb4211b922985a27aee98"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bOd31hlZBJnIYMBKYmvpxWFtjIh1LcoaqHrWjka000Ob32EgFK/5X6pfQhkpYcbNtHTylSpoX7yxFv6yD+M0Ag==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-16T12:10:34.190355Z","bundle_sha256":"d535488340be7ed5e1005b41f3192c1c79c9e4303acf1d8fd40342377e19b8f2"}}