{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:SQC6MDFEJSCJUTZYJKWPGD7ZPQ","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":"fce9fb5c4b603cffbf577046ac3506a31db50b91ebbee3c25caf32de5a8c9840","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-08-02T01:13:21Z","title_canon_sha256":"aafaeed8744e8ac43555ec4732eed03a8ad3ffe48e0f8a3d1bb73f033af58356"},"schema_version":"1.0","source":{"id":"1708.00570","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1708.00570","created_at":"2026-05-18T00:35:19Z"},{"alias_kind":"arxiv_version","alias_value":"1708.00570v1","created_at":"2026-05-18T00:35:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1708.00570","created_at":"2026-05-18T00:35:19Z"},{"alias_kind":"pith_short_12","alias_value":"SQC6MDFEJSCJ","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_16","alias_value":"SQC6MDFEJSCJUTZY","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_8","alias_value":"SQC6MDFE","created_at":"2026-05-18T12:31:43Z"}],"graph_snapshots":[{"event_id":"sha256:e748ed871e63be71811d140dad6a24a7cf34b083bcaed9c9f0b2b375908d4590","target":"graph","created_at":"2026-05-18T00:35:19Z","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"},"paper":{"abstract_excerpt":"High mass X-ray binaries (HMXRBs) like Cygnus X-1, host some of the most rapidly spinning black holes (BHs) known to date, reaching spin parameters $a \\gtrsim 0.84$. However, there are several effects that can severely limit the maximum BH spin parameter that could be obtained from direct collapse, such as tidal synchronization, magnetic core-envelope coupling and mass loss. Here we propose an alternative scenario where the BH is produced by a {\\it failed} supernova (SN) explosion that is unable to unbind the stellar progenitor. A large amount of fallback material ensues, whose interaction wit","authors_text":"Aldo Batta, Chris Fryer, Enrico Ramirez-Ruiz","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-08-02T01:13:21Z","title":"The Formation of Rapidly Rotating Black Holes in High Mass X-ray Binaries"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.00570","kind":"arxiv","version":1},"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":"sha256:2f8035dd4642ac07cb315445d2247c465f1b5d2dcf86d6c639fd9e209e395a71","target":"record","created_at":"2026-05-18T00:35:19Z","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":"fce9fb5c4b603cffbf577046ac3506a31db50b91ebbee3c25caf32de5a8c9840","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-08-02T01:13:21Z","title_canon_sha256":"aafaeed8744e8ac43555ec4732eed03a8ad3ffe48e0f8a3d1bb73f033af58356"},"schema_version":"1.0","source":{"id":"1708.00570","kind":"arxiv","version":1}},"canonical_sha256":"9405e60ca44c849a4f384aacf30ff97c3f9ab62deab03a9815f4695671e5c393","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9405e60ca44c849a4f384aacf30ff97c3f9ab62deab03a9815f4695671e5c393","first_computed_at":"2026-05-18T00:35:19.308965Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:35:19.308965Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OHNzEz+V8zGyr4Y4YrBh6ZGImAamjST1/uKlYGWr41vLADT1BThW+FHKRx4UTBCq+KjTwfKMtX3IWQPF41HxBg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:35:19.309522Z","signed_message":"canonical_sha256_bytes"},"source_id":"1708.00570","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2f8035dd4642ac07cb315445d2247c465f1b5d2dcf86d6c639fd9e209e395a71","sha256:e748ed871e63be71811d140dad6a24a7cf34b083bcaed9c9f0b2b375908d4590"],"state_sha256":"832e3dc0579bb626e7bd72b9e35dabc8cec2b57cc2dcab334557cf6016df9384"}