{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:74OAOKWGQ4GPFLS6FGRX6H5OTI","short_pith_number":"pith:74OAOKWG","canonical_record":{"source":{"id":"2112.02605","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-12-05T15:55:18Z","cross_cats_sorted":["astro-ph.SR","gr-qc"],"title_canon_sha256":"51278cb4c2b8582abd57018fd50b2a71e09ba636b2f4c501f91d4522a21fbb7c","abstract_canon_sha256":"50162dd0729f4d035b15742b402f121ed626246813773f7988f693b5950c430b"},"schema_version":"1.0"},"canonical_sha256":"ff1c072ac6870cf2ae5e29a37f1fae9a3d61f79a24ac761edf9e80016aebf306","source":{"kind":"arxiv","id":"2112.02605","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2112.02605","created_at":"2026-07-05T04:12:05Z"},{"alias_kind":"arxiv_version","alias_value":"2112.02605v2","created_at":"2026-07-05T04:12:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2112.02605","created_at":"2026-07-05T04:12:05Z"},{"alias_kind":"pith_short_12","alias_value":"74OAOKWGQ4GP","created_at":"2026-07-05T04:12:05Z"},{"alias_kind":"pith_short_16","alias_value":"74OAOKWGQ4GPFLS6","created_at":"2026-07-05T04:12:05Z"},{"alias_kind":"pith_short_8","alias_value":"74OAOKWG","created_at":"2026-07-05T04:12:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:74OAOKWGQ4GPFLS6FGRX6H5OTI","target":"record","payload":{"canonical_record":{"source":{"id":"2112.02605","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-12-05T15:55:18Z","cross_cats_sorted":["astro-ph.SR","gr-qc"],"title_canon_sha256":"51278cb4c2b8582abd57018fd50b2a71e09ba636b2f4c501f91d4522a21fbb7c","abstract_canon_sha256":"50162dd0729f4d035b15742b402f121ed626246813773f7988f693b5950c430b"},"schema_version":"1.0"},"canonical_sha256":"ff1c072ac6870cf2ae5e29a37f1fae9a3d61f79a24ac761edf9e80016aebf306","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:12:05.285403Z","signature_b64":"/nyToH6S6LRxv2xvkaOojcD1sxUvqjlkvZYdz6fCSjXK2dEhDb0TFAA/aHjDSn6hL97DAW3AfY9zlx2YKtRkCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ff1c072ac6870cf2ae5e29a37f1fae9a3d61f79a24ac761edf9e80016aebf306","last_reissued_at":"2026-07-05T04:12:05.284902Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:12:05.284902Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2112.02605","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":"2026-07-05T04:12:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WOSlBWNPr+UanM/w2+w5W22uy/AefKjDkjLN/gxvQGOQDc0ny+QDWTCQzS0Tnf7/ZTlHRTDMOzINe3hrbxxECw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T19:30:09.792389Z"},"content_sha256":"42d46fe1112b5224eb773404c21cb2f5bbdd01c4d56cb019abab37024d23d463","schema_version":"1.0","event_id":"sha256:42d46fe1112b5224eb773404c21cb2f5bbdd01c4d56cb019abab37024d23d463"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:74OAOKWGQ4GPFLS6FGRX6H5OTI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Population Properties of Gravitational-Wave Neutron Star--Black Hole Mergers","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR","gr-qc"],"primary_cat":"astro-ph.HE","authors_text":"Bing Zhang, He Gao, Jin-Ping Zhu, Shichao Wu, Ying Qin, Zhoujian Cao","submitted_at":"2021-12-05T15:55:18Z","abstract_excerpt":"Over the course of the third observing run of LIGO-Virgo-KAGRA Collaboration, several gravitational-wave (GW) neutron star--black hole (NSBH) candidates have been announced. By assuming these candidates are real signals and of astrophysical origins, we analyze the population properties of the mass and spin distributions for GW NSBH mergers. We find that the primary BH mass distribution of NSBH systems, whose shape is consistent with that inferred from the GW binary BH (BBH) primaries, can be well described as a power-law with an index of $\\alpha = 4.8^{+4.5}_{-2.8}$ plus a high-mass Gaussian c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2112.02605","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/2112.02605/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":"2026-07-05T04:12:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"L3yr/jzxr0hRPKJt04xn6mUFBD6Xa6KEO3zOiCD169uV8ZCHKdcUiy92P/WVUf4biyznsum9HVG9TavKPtneBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T19:30:09.792924Z"},"content_sha256":"15ad0bcfffde01d88f4dda1e8f4ed4b97de098490a5f11009371affb2deeade7","schema_version":"1.0","event_id":"sha256:15ad0bcfffde01d88f4dda1e8f4ed4b97de098490a5f11009371affb2deeade7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/74OAOKWGQ4GPFLS6FGRX6H5OTI/bundle.json","state_url":"https://pith.science/pith/74OAOKWGQ4GPFLS6FGRX6H5OTI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/74OAOKWGQ4GPFLS6FGRX6H5OTI/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":"2026-08-11T19:30:09Z","links":{"resolver":"https://pith.science/pith/74OAOKWGQ4GPFLS6FGRX6H5OTI","bundle":"https://pith.science/pith/74OAOKWGQ4GPFLS6FGRX6H5OTI/bundle.json","state":"https://pith.science/pith/74OAOKWGQ4GPFLS6FGRX6H5OTI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/74OAOKWGQ4GPFLS6FGRX6H5OTI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:74OAOKWGQ4GPFLS6FGRX6H5OTI","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":"50162dd0729f4d035b15742b402f121ed626246813773f7988f693b5950c430b","cross_cats_sorted":["astro-ph.SR","gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-12-05T15:55:18Z","title_canon_sha256":"51278cb4c2b8582abd57018fd50b2a71e09ba636b2f4c501f91d4522a21fbb7c"},"schema_version":"1.0","source":{"id":"2112.02605","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2112.02605","created_at":"2026-07-05T04:12:05Z"},{"alias_kind":"arxiv_version","alias_value":"2112.02605v2","created_at":"2026-07-05T04:12:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2112.02605","created_at":"2026-07-05T04:12:05Z"},{"alias_kind":"pith_short_12","alias_value":"74OAOKWGQ4GP","created_at":"2026-07-05T04:12:05Z"},{"alias_kind":"pith_short_16","alias_value":"74OAOKWGQ4GPFLS6","created_at":"2026-07-05T04:12:05Z"},{"alias_kind":"pith_short_8","alias_value":"74OAOKWG","created_at":"2026-07-05T04:12:05Z"}],"graph_snapshots":[{"event_id":"sha256:15ad0bcfffde01d88f4dda1e8f4ed4b97de098490a5f11009371affb2deeade7","target":"graph","created_at":"2026-07-05T04:12:05Z","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/2112.02605/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Over the course of the third observing run of LIGO-Virgo-KAGRA Collaboration, several gravitational-wave (GW) neutron star--black hole (NSBH) candidates have been announced. By assuming these candidates are real signals and of astrophysical origins, we analyze the population properties of the mass and spin distributions for GW NSBH mergers. We find that the primary BH mass distribution of NSBH systems, whose shape is consistent with that inferred from the GW binary BH (BBH) primaries, can be well described as a power-law with an index of $\\alpha = 4.8^{+4.5}_{-2.8}$ plus a high-mass Gaussian c","authors_text":"Bing Zhang, He Gao, Jin-Ping Zhu, Shichao Wu, Ying Qin, Zhoujian Cao","cross_cats":["astro-ph.SR","gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-12-05T15:55:18Z","title":"Population Properties of Gravitational-Wave Neutron Star--Black Hole Mergers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2112.02605","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":"sha256:42d46fe1112b5224eb773404c21cb2f5bbdd01c4d56cb019abab37024d23d463","target":"record","created_at":"2026-07-05T04:12:05Z","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":"50162dd0729f4d035b15742b402f121ed626246813773f7988f693b5950c430b","cross_cats_sorted":["astro-ph.SR","gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-12-05T15:55:18Z","title_canon_sha256":"51278cb4c2b8582abd57018fd50b2a71e09ba636b2f4c501f91d4522a21fbb7c"},"schema_version":"1.0","source":{"id":"2112.02605","kind":"arxiv","version":2}},"canonical_sha256":"ff1c072ac6870cf2ae5e29a37f1fae9a3d61f79a24ac761edf9e80016aebf306","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ff1c072ac6870cf2ae5e29a37f1fae9a3d61f79a24ac761edf9e80016aebf306","first_computed_at":"2026-07-05T04:12:05.284902Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:12:05.284902Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/nyToH6S6LRxv2xvkaOojcD1sxUvqjlkvZYdz6fCSjXK2dEhDb0TFAA/aHjDSn6hL97DAW3AfY9zlx2YKtRkCw==","signature_status":"signed_v1","signed_at":"2026-07-05T04:12:05.285403Z","signed_message":"canonical_sha256_bytes"},"source_id":"2112.02605","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:42d46fe1112b5224eb773404c21cb2f5bbdd01c4d56cb019abab37024d23d463","sha256:15ad0bcfffde01d88f4dda1e8f4ed4b97de098490a5f11009371affb2deeade7"],"state_sha256":"883f73ef68310b4ad394525f7ade6aadf48bca9f605cf6f6417278566056c326"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kAH1WCW/ObScs8PcwZ8ny1WSy0+QAbehmF64LDzrqpiyswsvRhFC5dve0tSgT7ZJqWqlYVX3zc22moy2d8P7BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T19:30:09.796500Z","bundle_sha256":"996aec5f3ec42b15b9accd7db207bbe93873c28b898aabdef6f28b3a229f58af"}}