{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:2D6T44NOUXSAJIWYU3IXFP5YR7","short_pith_number":"pith:2D6T44NO","canonical_record":{"source":{"id":"2001.08706","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-01-23T17:54:20Z","cross_cats_sorted":[],"title_canon_sha256":"a44e56c01f0a69f61519852bacf50e9a7b8bc7260921795536657316e3d9f4e7","abstract_canon_sha256":"26e112940f58fc4961419b297dafcc6e8541064c757a9275eda7c277b0492b8d"},"schema_version":"1.0"},"canonical_sha256":"d0fd3e71aea5e404a2d8a6d172bfb88fc3f6a52f3c1813d8f02aaa4a36282e4b","source":{"kind":"arxiv","id":"2001.08706","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2001.08706","created_at":"2026-07-05T01:07:26Z"},{"alias_kind":"arxiv_version","alias_value":"2001.08706v2","created_at":"2026-07-05T01:07:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2001.08706","created_at":"2026-07-05T01:07:26Z"},{"alias_kind":"pith_short_12","alias_value":"2D6T44NOUXSA","created_at":"2026-07-05T01:07:26Z"},{"alias_kind":"pith_short_16","alias_value":"2D6T44NOUXSAJIWY","created_at":"2026-07-05T01:07:26Z"},{"alias_kind":"pith_short_8","alias_value":"2D6T44NO","created_at":"2026-07-05T01:07:26Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:2D6T44NOUXSAJIWYU3IXFP5YR7","target":"record","payload":{"canonical_record":{"source":{"id":"2001.08706","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-01-23T17:54:20Z","cross_cats_sorted":[],"title_canon_sha256":"a44e56c01f0a69f61519852bacf50e9a7b8bc7260921795536657316e3d9f4e7","abstract_canon_sha256":"26e112940f58fc4961419b297dafcc6e8541064c757a9275eda7c277b0492b8d"},"schema_version":"1.0"},"canonical_sha256":"d0fd3e71aea5e404a2d8a6d172bfb88fc3f6a52f3c1813d8f02aaa4a36282e4b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:07:26.440923Z","signature_b64":"69jx5cghoYqRtdl2obDxsKevhs2Ja2pBBHjMrIKreUgmE2cHihN3skAcMbaMr0PqQfjDIsAqFSE8ND6Q10J4Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d0fd3e71aea5e404a2d8a6d172bfb88fc3f6a52f3c1813d8f02aaa4a36282e4b","last_reissued_at":"2026-07-05T01:07:26.440459Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:07:26.440459Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2001.08706","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":"2026-07-05T01:07:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TRRsjep/tvT9sIDkolQ7ogV1s/CrFW47TsGfFeJxHku4lfX/tXEp5fTKtgACz3v9PjnXmZze4v5j/O39cNjGCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-17T02:19:35.024892Z"},"content_sha256":"272e03d00176b4d1d4684ffd0c96b49ba5a41d1ab57f6ccf92d4b73467e94b9d","schema_version":"1.0","event_id":"sha256:272e03d00176b4d1d4684ffd0c96b49ba5a41d1ab57f6ccf92d4b73467e94b9d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:2D6T44NOUXSAJIWYU3IXFP5YR7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Search for Neutron Star-Black Hole Binary Mergers in the Short Gamma-Ray Burst Population","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. J. Levan, B. P. Gompertz, N. R. Tanvir","submitted_at":"2020-01-23T17:54:20Z","abstract_excerpt":"Short gamma-ray bursts (SGRBs) are now known to be the product of the merger of two compact objects. However, two possible formation channels exist: neutron star -- neutron star (NS -- NS) or NS -- black hole (BH). The landmark SGRB 170817A provided evidence for the NS -- NS channel, thanks to analysis of its gravitational wave signal. We investigate the complete population of SGRBs with an associated redshift (39 events), and search for any divisions that may indicate that a NS -- BH formation channel also contributes. Though no conclusive dichotomy is found, we find several lines of evidence"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2001.08706","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/2001.08706/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":"2026-07-05T01:07:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3ISQh6NxYbCG64HPcPuaQFTrQeYpDtpK1A9Z3tPHlz7hHVRhaUaY2bXQhczi6FOQ5Ud1vqJPteIGDJ2gNVhMDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-17T02:19:35.025265Z"},"content_sha256":"cce61536109b246b58e95432a78f10e1c31480ee01699c8fb2fe62d2d0b9b269","schema_version":"1.0","event_id":"sha256:cce61536109b246b58e95432a78f10e1c31480ee01699c8fb2fe62d2d0b9b269"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2D6T44NOUXSAJIWYU3IXFP5YR7/bundle.json","state_url":"https://pith.science/pith/2D6T44NOUXSAJIWYU3IXFP5YR7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2D6T44NOUXSAJIWYU3IXFP5YR7/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":"2026-07-17T02:19:35Z","links":{"resolver":"https://pith.science/pith/2D6T44NOUXSAJIWYU3IXFP5YR7","bundle":"https://pith.science/pith/2D6T44NOUXSAJIWYU3IXFP5YR7/bundle.json","state":"https://pith.science/pith/2D6T44NOUXSAJIWYU3IXFP5YR7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2D6T44NOUXSAJIWYU3IXFP5YR7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:2D6T44NOUXSAJIWYU3IXFP5YR7","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":"26e112940f58fc4961419b297dafcc6e8541064c757a9275eda7c277b0492b8d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-01-23T17:54:20Z","title_canon_sha256":"a44e56c01f0a69f61519852bacf50e9a7b8bc7260921795536657316e3d9f4e7"},"schema_version":"1.0","source":{"id":"2001.08706","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2001.08706","created_at":"2026-07-05T01:07:26Z"},{"alias_kind":"arxiv_version","alias_value":"2001.08706v2","created_at":"2026-07-05T01:07:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2001.08706","created_at":"2026-07-05T01:07:26Z"},{"alias_kind":"pith_short_12","alias_value":"2D6T44NOUXSA","created_at":"2026-07-05T01:07:26Z"},{"alias_kind":"pith_short_16","alias_value":"2D6T44NOUXSAJIWY","created_at":"2026-07-05T01:07:26Z"},{"alias_kind":"pith_short_8","alias_value":"2D6T44NO","created_at":"2026-07-05T01:07:26Z"}],"graph_snapshots":[{"event_id":"sha256:cce61536109b246b58e95432a78f10e1c31480ee01699c8fb2fe62d2d0b9b269","target":"graph","created_at":"2026-07-05T01:07:26Z","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/2001.08706/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Short gamma-ray bursts (SGRBs) are now known to be the product of the merger of two compact objects. However, two possible formation channels exist: neutron star -- neutron star (NS -- NS) or NS -- black hole (BH). The landmark SGRB 170817A provided evidence for the NS -- NS channel, thanks to analysis of its gravitational wave signal. We investigate the complete population of SGRBs with an associated redshift (39 events), and search for any divisions that may indicate that a NS -- BH formation channel also contributes. Though no conclusive dichotomy is found, we find several lines of evidence","authors_text":"A. J. Levan, B. P. Gompertz, N. R. Tanvir","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-01-23T17:54:20Z","title":"A Search for Neutron Star-Black Hole Binary Mergers in the Short Gamma-Ray Burst Population"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2001.08706","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":"sha256:272e03d00176b4d1d4684ffd0c96b49ba5a41d1ab57f6ccf92d4b73467e94b9d","target":"record","created_at":"2026-07-05T01:07:26Z","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":"26e112940f58fc4961419b297dafcc6e8541064c757a9275eda7c277b0492b8d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-01-23T17:54:20Z","title_canon_sha256":"a44e56c01f0a69f61519852bacf50e9a7b8bc7260921795536657316e3d9f4e7"},"schema_version":"1.0","source":{"id":"2001.08706","kind":"arxiv","version":2}},"canonical_sha256":"d0fd3e71aea5e404a2d8a6d172bfb88fc3f6a52f3c1813d8f02aaa4a36282e4b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d0fd3e71aea5e404a2d8a6d172bfb88fc3f6a52f3c1813d8f02aaa4a36282e4b","first_computed_at":"2026-07-05T01:07:26.440459Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:07:26.440459Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"69jx5cghoYqRtdl2obDxsKevhs2Ja2pBBHjMrIKreUgmE2cHihN3skAcMbaMr0PqQfjDIsAqFSE8ND6Q10J4Cg==","signature_status":"signed_v1","signed_at":"2026-07-05T01:07:26.440923Z","signed_message":"canonical_sha256_bytes"},"source_id":"2001.08706","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:272e03d00176b4d1d4684ffd0c96b49ba5a41d1ab57f6ccf92d4b73467e94b9d","sha256:cce61536109b246b58e95432a78f10e1c31480ee01699c8fb2fe62d2d0b9b269"],"state_sha256":"5b96d6646b8a2fee733bfd0394875dc564464f1b39578e3e93e934dbd5f23927"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5PBZFx8Ka9UnD468aGLgRWxG1xWCW1mvZRTV1F7itPj96L1UishcvM8V6VZeayrkw1pA2Wp5jGGXwp9Pu4pqBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-17T02:19:35.027773Z","bundle_sha256":"5e401e1e274a0d76667a2d8640cf0d162828731753e7090d3aa975caac56186d"}}