{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:XH3LWST4ZPIZG27LMPD6PQ3GFR","short_pith_number":"pith:XH3LWST4","canonical_record":{"source":{"id":"2106.12381","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-06-23T13:23:54Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"545479ee9926f65c3f38cf5c0e62bfd19028fc5d878a7539c88bf68d02cd1843","abstract_canon_sha256":"00af7c878748bdd0c8accb109792c9fecc980deb37807d0196e5ebeebbbe02af"},"schema_version":"1.0"},"canonical_sha256":"b9f6bb4a7ccbd1936beb63c7e7c3662c7500c59374ef4b3cd48074895334e397","source":{"kind":"arxiv","id":"2106.12381","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2106.12381","created_at":"2026-07-05T03:23:43Z"},{"alias_kind":"arxiv_version","alias_value":"2106.12381v2","created_at":"2026-07-05T03:23:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2106.12381","created_at":"2026-07-05T03:23:43Z"},{"alias_kind":"pith_short_12","alias_value":"XH3LWST4ZPIZ","created_at":"2026-07-05T03:23:43Z"},{"alias_kind":"pith_short_16","alias_value":"XH3LWST4ZPIZG27L","created_at":"2026-07-05T03:23:43Z"},{"alias_kind":"pith_short_8","alias_value":"XH3LWST4","created_at":"2026-07-05T03:23:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:XH3LWST4ZPIZG27LMPD6PQ3GFR","target":"record","payload":{"canonical_record":{"source":{"id":"2106.12381","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-06-23T13:23:54Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"545479ee9926f65c3f38cf5c0e62bfd19028fc5d878a7539c88bf68d02cd1843","abstract_canon_sha256":"00af7c878748bdd0c8accb109792c9fecc980deb37807d0196e5ebeebbbe02af"},"schema_version":"1.0"},"canonical_sha256":"b9f6bb4a7ccbd1936beb63c7e7c3662c7500c59374ef4b3cd48074895334e397","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:23:43.144727Z","signature_b64":"4FQrVF3+A/rI3MBSUd5zmPR7h6xybUfyw8a7wdJvCsiSSe1CyxXWGbAjJYpr0aDkUTP4sTkupx+ysRBMPGo0Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b9f6bb4a7ccbd1936beb63c7e7c3662c7500c59374ef4b3cd48074895334e397","last_reissued_at":"2026-07-05T03:23:43.144214Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:23:43.144214Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2106.12381","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":"2026-07-05T03:23:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q0TcnhLFfmrZ3eHRblAcfLOEIt+l4zYwJ4YNTOW6b/crj1W4s6Ks4lbEOtD1WkPvBc0BXevuw/S/2v7z3qJaAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-17T00:25:38.220629Z"},"content_sha256":"3308144f4e67c4909cba2c4dd73a8021ee9539d2f2718c9514ee4bac4acb553d","schema_version":"1.0","event_id":"sha256:3308144f4e67c4909cba2c4dd73a8021ee9539d2f2718c9514ee4bac4acb553d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:XH3LWST4ZPIZG27LMPD6PQ3GFR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Fallback supernova assembly of heavy binary neutron stars and light black hole-neutron star pairs and the common stellar ancestry of GW190425 and GW200115","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.HE","authors_text":"Aldo Batta, Alejandro Vigna-G\\'omez, David R. Aguilera-Dena, Enrico Ramirez-Ruiz, Norbert Langer, Reinhold Willcox, Sophie L. Schr{\\o}der","submitted_at":"2021-06-23T13:23:54Z","abstract_excerpt":"The detection of the unusually heavy binary neutron star merger GW190425 marked a stark contrast to the mass distribution from known Galactic pulsars in double neutron star binaries and gravitational-wave source GW170817. We suggest here a formation channel for heavy binary neutron stars and light black hole - neutron star binaries in which massive helium stars, which had their hydrogen envelope removed during a common envelope phase, remain compact and avoid mass transfer onto the neutron star companion, possibly avoiding pulsar recycling. We present three-dimensional simulations of the super"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2106.12381","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/2106.12381/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":"2026-07-05T03:23:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rnB87tc/o8fTgXjrieXPQfdwvnCFaWW+ajYszCUP0qn2q6UXacxIs7yDtZMZ326PPj0QwKsksdqdPaHcIKtVBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-17T00:25:38.221001Z"},"content_sha256":"a1acf9589656775d3e95755efaea2487d54a070e3577f6a002ce384af930ffe2","schema_version":"1.0","event_id":"sha256:a1acf9589656775d3e95755efaea2487d54a070e3577f6a002ce384af930ffe2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XH3LWST4ZPIZG27LMPD6PQ3GFR/bundle.json","state_url":"https://pith.science/pith/XH3LWST4ZPIZG27LMPD6PQ3GFR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XH3LWST4ZPIZG27LMPD6PQ3GFR/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":"2026-07-17T00:25:38Z","links":{"resolver":"https://pith.science/pith/XH3LWST4ZPIZG27LMPD6PQ3GFR","bundle":"https://pith.science/pith/XH3LWST4ZPIZG27LMPD6PQ3GFR/bundle.json","state":"https://pith.science/pith/XH3LWST4ZPIZG27LMPD6PQ3GFR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XH3LWST4ZPIZG27LMPD6PQ3GFR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:XH3LWST4ZPIZG27LMPD6PQ3GFR","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":"00af7c878748bdd0c8accb109792c9fecc980deb37807d0196e5ebeebbbe02af","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-06-23T13:23:54Z","title_canon_sha256":"545479ee9926f65c3f38cf5c0e62bfd19028fc5d878a7539c88bf68d02cd1843"},"schema_version":"1.0","source":{"id":"2106.12381","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2106.12381","created_at":"2026-07-05T03:23:43Z"},{"alias_kind":"arxiv_version","alias_value":"2106.12381v2","created_at":"2026-07-05T03:23:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2106.12381","created_at":"2026-07-05T03:23:43Z"},{"alias_kind":"pith_short_12","alias_value":"XH3LWST4ZPIZ","created_at":"2026-07-05T03:23:43Z"},{"alias_kind":"pith_short_16","alias_value":"XH3LWST4ZPIZG27L","created_at":"2026-07-05T03:23:43Z"},{"alias_kind":"pith_short_8","alias_value":"XH3LWST4","created_at":"2026-07-05T03:23:43Z"}],"graph_snapshots":[{"event_id":"sha256:a1acf9589656775d3e95755efaea2487d54a070e3577f6a002ce384af930ffe2","target":"graph","created_at":"2026-07-05T03:23:43Z","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/2106.12381/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The detection of the unusually heavy binary neutron star merger GW190425 marked a stark contrast to the mass distribution from known Galactic pulsars in double neutron star binaries and gravitational-wave source GW170817. We suggest here a formation channel for heavy binary neutron stars and light black hole - neutron star binaries in which massive helium stars, which had their hydrogen envelope removed during a common envelope phase, remain compact and avoid mass transfer onto the neutron star companion, possibly avoiding pulsar recycling. We present three-dimensional simulations of the super","authors_text":"Aldo Batta, Alejandro Vigna-G\\'omez, David R. Aguilera-Dena, Enrico Ramirez-Ruiz, Norbert Langer, Reinhold Willcox, Sophie L. Schr{\\o}der","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-06-23T13:23:54Z","title":"Fallback supernova assembly of heavy binary neutron stars and light black hole-neutron star pairs and the common stellar ancestry of GW190425 and GW200115"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2106.12381","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":"sha256:3308144f4e67c4909cba2c4dd73a8021ee9539d2f2718c9514ee4bac4acb553d","target":"record","created_at":"2026-07-05T03:23:43Z","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":"00af7c878748bdd0c8accb109792c9fecc980deb37807d0196e5ebeebbbe02af","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-06-23T13:23:54Z","title_canon_sha256":"545479ee9926f65c3f38cf5c0e62bfd19028fc5d878a7539c88bf68d02cd1843"},"schema_version":"1.0","source":{"id":"2106.12381","kind":"arxiv","version":2}},"canonical_sha256":"b9f6bb4a7ccbd1936beb63c7e7c3662c7500c59374ef4b3cd48074895334e397","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b9f6bb4a7ccbd1936beb63c7e7c3662c7500c59374ef4b3cd48074895334e397","first_computed_at":"2026-07-05T03:23:43.144214Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:23:43.144214Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4FQrVF3+A/rI3MBSUd5zmPR7h6xybUfyw8a7wdJvCsiSSe1CyxXWGbAjJYpr0aDkUTP4sTkupx+ysRBMPGo0Bg==","signature_status":"signed_v1","signed_at":"2026-07-05T03:23:43.144727Z","signed_message":"canonical_sha256_bytes"},"source_id":"2106.12381","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3308144f4e67c4909cba2c4dd73a8021ee9539d2f2718c9514ee4bac4acb553d","sha256:a1acf9589656775d3e95755efaea2487d54a070e3577f6a002ce384af930ffe2"],"state_sha256":"ba079a379f6de7f4fb0b35278e1321e3af06574e57b7a17c76a3be4cd3e0e1af"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4pgHFNAIGhsPl0QJ6Yv/WJnq4VIvyxKJzadjdKoqxdinoCfVOwPHBCLebUOVo8dhYD33aTLGtdjdvjaymO48Ag==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-17T00:25:38.223538Z","bundle_sha256":"1028aec92426c1d8d4be5f7f77aff94ea8968f548e0ed9d9433015117127f1bd"}}