{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:TBLRLK6MH5M3ZXB7N3PM4ZXODC","short_pith_number":"pith:TBLRLK6M","canonical_record":{"source":{"id":"2009.06655","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-09-14T18:00:10Z","cross_cats_sorted":[],"title_canon_sha256":"2e122c9cba4c4085ae47579ed6591be0b00acda0a072a76e7d72630bf93bf636","abstract_canon_sha256":"e35e6733b632eed506d53774eec1ccefe48608e46b3c589908b512c81d5e502c"},"schema_version":"1.0"},"canonical_sha256":"985715abcc3f59bcdc3f6edece66ee18b9f5e99b7b60527013156b000b833f17","source":{"kind":"arxiv","id":"2009.06655","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2009.06655","created_at":"2026-07-05T05:28:58Z"},{"alias_kind":"arxiv_version","alias_value":"2009.06655v2","created_at":"2026-07-05T05:28:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.06655","created_at":"2026-07-05T05:28:58Z"},{"alias_kind":"pith_short_12","alias_value":"TBLRLK6MH5M3","created_at":"2026-07-05T05:28:58Z"},{"alias_kind":"pith_short_16","alias_value":"TBLRLK6MH5M3ZXB7","created_at":"2026-07-05T05:28:58Z"},{"alias_kind":"pith_short_8","alias_value":"TBLRLK6M","created_at":"2026-07-05T05:28:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:TBLRLK6MH5M3ZXB7N3PM4ZXODC","target":"record","payload":{"canonical_record":{"source":{"id":"2009.06655","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-09-14T18:00:10Z","cross_cats_sorted":[],"title_canon_sha256":"2e122c9cba4c4085ae47579ed6591be0b00acda0a072a76e7d72630bf93bf636","abstract_canon_sha256":"e35e6733b632eed506d53774eec1ccefe48608e46b3c589908b512c81d5e502c"},"schema_version":"1.0"},"canonical_sha256":"985715abcc3f59bcdc3f6edece66ee18b9f5e99b7b60527013156b000b833f17","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:28:58.543722Z","signature_b64":"I+zYXQPYEik4tSkvutqVO6ToMKcyWRrG/gkx5UMeDafJhjvUprPcK37ER+yqmz/3QZrEUw3+HZuBCilz33WAAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"985715abcc3f59bcdc3f6edece66ee18b9f5e99b7b60527013156b000b833f17","last_reissued_at":"2026-07-05T05:28:58.543371Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:28:58.543371Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2009.06655","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":"2026-07-05T05:28:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"L6xOxLg/NFjmn4GqFRB+mW5u61Bay7U7K22TteLkz5gNqVhftEchWskPzMi0bT5EP3j2f5uKjxWtzeufGNAnDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-18T18:46:39.293676Z"},"content_sha256":"4485cdeb6e3ab14f48eea91996e4e030dc38f842fbc112e8ee108ff011fe6585","schema_version":"1.0","event_id":"sha256:4485cdeb6e3ab14f48eea91996e4e030dc38f842fbc112e8ee108ff011fe6585"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:TBLRLK6MH5M3ZXB7N3PM4ZXODC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Black hole - neutron star mergers: The first mass gap and kilonovae","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"C.L. Fryer, K. Belczynski, P. Drozda, R. O'Shaughnessy, T. Bulik","submitted_at":"2020-09-14T18:00:10Z","abstract_excerpt":"Observations of X-ray binaries indicate a dearth of compact objects in the mass range from $\\sim 2-5 M_{\\odot}$. The existence of this (first mass) gap has been used to discriminate between proposed engines behind core-collapse supernovae. From LIGO/Virgo observations of binary compact remnant masses, several candidate first mass gap objects (either neutron stars (NSs) or black holes (BHs)) were identified during the O3 science run. Motivated by these new observations, we study the formation of BH-NS mergers in the framework of isolated classical binary evolution, using population synthesis me"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.06655","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/2009.06655/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":"2026-07-05T05:28:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PzpG1hzq1Aup0Fm5MNG/QZhXRoHy0ic/GLx57b/Fovx8fUGnsM7P4PTPYMnNhHcskCHdkhTDEsGXj6F3zSdEDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-18T18:46:39.294050Z"},"content_sha256":"9342d234d835b5b828c1e9252ac9fb85306b8d09fcfe325302029c02823d9c35","schema_version":"1.0","event_id":"sha256:9342d234d835b5b828c1e9252ac9fb85306b8d09fcfe325302029c02823d9c35"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TBLRLK6MH5M3ZXB7N3PM4ZXODC/bundle.json","state_url":"https://pith.science/pith/TBLRLK6MH5M3ZXB7N3PM4ZXODC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TBLRLK6MH5M3ZXB7N3PM4ZXODC/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":"2026-07-18T18:46:39Z","links":{"resolver":"https://pith.science/pith/TBLRLK6MH5M3ZXB7N3PM4ZXODC","bundle":"https://pith.science/pith/TBLRLK6MH5M3ZXB7N3PM4ZXODC/bundle.json","state":"https://pith.science/pith/TBLRLK6MH5M3ZXB7N3PM4ZXODC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TBLRLK6MH5M3ZXB7N3PM4ZXODC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:TBLRLK6MH5M3ZXB7N3PM4ZXODC","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":"e35e6733b632eed506d53774eec1ccefe48608e46b3c589908b512c81d5e502c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-09-14T18:00:10Z","title_canon_sha256":"2e122c9cba4c4085ae47579ed6591be0b00acda0a072a76e7d72630bf93bf636"},"schema_version":"1.0","source":{"id":"2009.06655","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2009.06655","created_at":"2026-07-05T05:28:58Z"},{"alias_kind":"arxiv_version","alias_value":"2009.06655v2","created_at":"2026-07-05T05:28:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.06655","created_at":"2026-07-05T05:28:58Z"},{"alias_kind":"pith_short_12","alias_value":"TBLRLK6MH5M3","created_at":"2026-07-05T05:28:58Z"},{"alias_kind":"pith_short_16","alias_value":"TBLRLK6MH5M3ZXB7","created_at":"2026-07-05T05:28:58Z"},{"alias_kind":"pith_short_8","alias_value":"TBLRLK6M","created_at":"2026-07-05T05:28:58Z"}],"graph_snapshots":[{"event_id":"sha256:9342d234d835b5b828c1e9252ac9fb85306b8d09fcfe325302029c02823d9c35","target":"graph","created_at":"2026-07-05T05:28:58Z","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/2009.06655/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Observations of X-ray binaries indicate a dearth of compact objects in the mass range from $\\sim 2-5 M_{\\odot}$. The existence of this (first mass) gap has been used to discriminate between proposed engines behind core-collapse supernovae. From LIGO/Virgo observations of binary compact remnant masses, several candidate first mass gap objects (either neutron stars (NSs) or black holes (BHs)) were identified during the O3 science run. Motivated by these new observations, we study the formation of BH-NS mergers in the framework of isolated classical binary evolution, using population synthesis me","authors_text":"C.L. Fryer, K. Belczynski, P. Drozda, R. O'Shaughnessy, T. Bulik","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-09-14T18:00:10Z","title":"Black hole - neutron star mergers: The first mass gap and kilonovae"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.06655","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":"sha256:4485cdeb6e3ab14f48eea91996e4e030dc38f842fbc112e8ee108ff011fe6585","target":"record","created_at":"2026-07-05T05:28:58Z","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":"e35e6733b632eed506d53774eec1ccefe48608e46b3c589908b512c81d5e502c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-09-14T18:00:10Z","title_canon_sha256":"2e122c9cba4c4085ae47579ed6591be0b00acda0a072a76e7d72630bf93bf636"},"schema_version":"1.0","source":{"id":"2009.06655","kind":"arxiv","version":2}},"canonical_sha256":"985715abcc3f59bcdc3f6edece66ee18b9f5e99b7b60527013156b000b833f17","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"985715abcc3f59bcdc3f6edece66ee18b9f5e99b7b60527013156b000b833f17","first_computed_at":"2026-07-05T05:28:58.543371Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:28:58.543371Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"I+zYXQPYEik4tSkvutqVO6ToMKcyWRrG/gkx5UMeDafJhjvUprPcK37ER+yqmz/3QZrEUw3+HZuBCilz33WAAA==","signature_status":"signed_v1","signed_at":"2026-07-05T05:28:58.543722Z","signed_message":"canonical_sha256_bytes"},"source_id":"2009.06655","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4485cdeb6e3ab14f48eea91996e4e030dc38f842fbc112e8ee108ff011fe6585","sha256:9342d234d835b5b828c1e9252ac9fb85306b8d09fcfe325302029c02823d9c35"],"state_sha256":"3a8074ae139156ee1513e60e26be17b432b62023b66c012eac0354feb29052d5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ipzBkqGycDUvM0UFt6Ac2dg4vOptqnqJjPhZs+VycM6QkQy+k2aOc5Kv5CFN9aLZjhPysYFUcn8f+U7TTxwFDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-18T18:46:39.296199Z","bundle_sha256":"7c73146c263118c32defb0d8a188cd321799c95b8c87c3baa9330ce652a26577"}}