{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:COQDJ5CK6SEQQK5R7TSTERLUON","short_pith_number":"pith:COQDJ5CK","canonical_record":{"source":{"id":"0906.1950","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-06-10T14:39:26Z","cross_cats_sorted":[],"title_canon_sha256":"0bbbc902765a474fc781e48847ffab2e238270ca0f3bb443eec032cf40824cf4","abstract_canon_sha256":"bcb0cbfe021635fd4e60353c86f7e2859da777ea830b6d2010758b2ed36843c8"},"schema_version":"1.0"},"canonical_sha256":"13a034f44af489082bb1fce5324574734297d60cc92d2c40340290fdbe88a438","source":{"kind":"arxiv","id":"0906.1950","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0906.1950","created_at":"2026-05-18T02:13:20Z"},{"alias_kind":"arxiv_version","alias_value":"0906.1950v1","created_at":"2026-05-18T02:13:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0906.1950","created_at":"2026-05-18T02:13:20Z"},{"alias_kind":"pith_short_12","alias_value":"COQDJ5CK6SEQ","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_16","alias_value":"COQDJ5CK6SEQQK5R","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_8","alias_value":"COQDJ5CK","created_at":"2026-05-18T12:25:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:COQDJ5CK6SEQQK5R7TSTERLUON","target":"record","payload":{"canonical_record":{"source":{"id":"0906.1950","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-06-10T14:39:26Z","cross_cats_sorted":[],"title_canon_sha256":"0bbbc902765a474fc781e48847ffab2e238270ca0f3bb443eec032cf40824cf4","abstract_canon_sha256":"bcb0cbfe021635fd4e60353c86f7e2859da777ea830b6d2010758b2ed36843c8"},"schema_version":"1.0"},"canonical_sha256":"13a034f44af489082bb1fce5324574734297d60cc92d2c40340290fdbe88a438","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:13:20.964533Z","signature_b64":"i9oAosC7Llpq3RN+U7g4E4nMpSmYWwf14FEBdaqOkuuErxu+08aoi8TKI/zyiX6u9I/oVeUgHkV3NZfLBw/dBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"13a034f44af489082bb1fce5324574734297d60cc92d2c40340290fdbe88a438","last_reissued_at":"2026-05-18T02:13:20.963906Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:13:20.963906Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0906.1950","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:13:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bu/5EP7Tv2Eug/1qPP6gvxF9D93/8aQ2vuNBLVrvOFYAkoOgoy4ZJeCPgjz+ahKdRScWSBC5HTA0Sl8749y3CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T16:57:40.739685Z"},"content_sha256":"4e9a0757a21542cb6887a21f9a061872f55ecf51dd0ad65f3e7aaa30d53407d0","schema_version":"1.0","event_id":"sha256:4e9a0757a21542cb6887a21f9a061872f55ecf51dd0ad65f3e7aaa30d53407d0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:COQDJ5CK6SEQQK5R7TSTERLUON","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Mini-discs around spinning black holes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Andrei M. Beloborodov, Ivan Zalamea","submitted_at":"2009-06-10T14:39:26Z","abstract_excerpt":"Accretion onto black holes in wind-fed binaries and in collapsars forms small rotating discs with peculiar properties. Such ``mini-discs'' accrete on the free-fall time without help of viscosity and nevertheless can have a high radiative efficiency. The inviscid mini-disc model was previously constructed for a non-rotating black hole. We extend the model to the case of a spinning black hole, calculate the structure and radiative efficiency of the disc and find their dependence on the black hole spin. If the angular momenta of the disc and the black hole are anti-aligned, a hydrodynamic analog "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0906.1950","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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":"2026-05-18T02:13:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"00g/kXsgzB3QCuFAJHJB9j5bf4CasjLfLtjGVbFFKfV8MogCEsqMOM6ViKgwRr8bsAeJD8DY7ekVXuHDJPm3AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T16:57:40.740036Z"},"content_sha256":"fd37e16fa138858a6960c190556ae97b8c9115c30de5b3fe5e6e7ddb0375bdfc","schema_version":"1.0","event_id":"sha256:fd37e16fa138858a6960c190556ae97b8c9115c30de5b3fe5e6e7ddb0375bdfc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/COQDJ5CK6SEQQK5R7TSTERLUON/bundle.json","state_url":"https://pith.science/pith/COQDJ5CK6SEQQK5R7TSTERLUON/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/COQDJ5CK6SEQQK5R7TSTERLUON/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":"2026-06-03T16:57:40Z","links":{"resolver":"https://pith.science/pith/COQDJ5CK6SEQQK5R7TSTERLUON","bundle":"https://pith.science/pith/COQDJ5CK6SEQQK5R7TSTERLUON/bundle.json","state":"https://pith.science/pith/COQDJ5CK6SEQQK5R7TSTERLUON/state.json","well_known_bundle":"https://pith.science/.well-known/pith/COQDJ5CK6SEQQK5R7TSTERLUON/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:COQDJ5CK6SEQQK5R7TSTERLUON","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":"bcb0cbfe021635fd4e60353c86f7e2859da777ea830b6d2010758b2ed36843c8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-06-10T14:39:26Z","title_canon_sha256":"0bbbc902765a474fc781e48847ffab2e238270ca0f3bb443eec032cf40824cf4"},"schema_version":"1.0","source":{"id":"0906.1950","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0906.1950","created_at":"2026-05-18T02:13:20Z"},{"alias_kind":"arxiv_version","alias_value":"0906.1950v1","created_at":"2026-05-18T02:13:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0906.1950","created_at":"2026-05-18T02:13:20Z"},{"alias_kind":"pith_short_12","alias_value":"COQDJ5CK6SEQ","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_16","alias_value":"COQDJ5CK6SEQQK5R","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_8","alias_value":"COQDJ5CK","created_at":"2026-05-18T12:25:59Z"}],"graph_snapshots":[{"event_id":"sha256:fd37e16fa138858a6960c190556ae97b8c9115c30de5b3fe5e6e7ddb0375bdfc","target":"graph","created_at":"2026-05-18T02:13:20Z","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":"Accretion onto black holes in wind-fed binaries and in collapsars forms small rotating discs with peculiar properties. Such ``mini-discs'' accrete on the free-fall time without help of viscosity and nevertheless can have a high radiative efficiency. The inviscid mini-disc model was previously constructed for a non-rotating black hole. We extend the model to the case of a spinning black hole, calculate the structure and radiative efficiency of the disc and find their dependence on the black hole spin. If the angular momenta of the disc and the black hole are anti-aligned, a hydrodynamic analog ","authors_text":"Andrei M. Beloborodov, Ivan Zalamea","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-06-10T14:39:26Z","title":"Mini-discs around spinning black holes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0906.1950","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":"sha256:4e9a0757a21542cb6887a21f9a061872f55ecf51dd0ad65f3e7aaa30d53407d0","target":"record","created_at":"2026-05-18T02:13:20Z","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":"bcb0cbfe021635fd4e60353c86f7e2859da777ea830b6d2010758b2ed36843c8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-06-10T14:39:26Z","title_canon_sha256":"0bbbc902765a474fc781e48847ffab2e238270ca0f3bb443eec032cf40824cf4"},"schema_version":"1.0","source":{"id":"0906.1950","kind":"arxiv","version":1}},"canonical_sha256":"13a034f44af489082bb1fce5324574734297d60cc92d2c40340290fdbe88a438","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"13a034f44af489082bb1fce5324574734297d60cc92d2c40340290fdbe88a438","first_computed_at":"2026-05-18T02:13:20.963906Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:13:20.963906Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"i9oAosC7Llpq3RN+U7g4E4nMpSmYWwf14FEBdaqOkuuErxu+08aoi8TKI/zyiX6u9I/oVeUgHkV3NZfLBw/dBw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:13:20.964533Z","signed_message":"canonical_sha256_bytes"},"source_id":"0906.1950","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4e9a0757a21542cb6887a21f9a061872f55ecf51dd0ad65f3e7aaa30d53407d0","sha256:fd37e16fa138858a6960c190556ae97b8c9115c30de5b3fe5e6e7ddb0375bdfc"],"state_sha256":"93a7a9824bdcdd9cfe3af0cb9831c7b9e713e9208b7949912692b010526b7b38"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ch6FIM0AyIB/T0HZbeDvYJDQXzKt0gRSbSAEbwcenZtZcIDVdZAEVy7QtDKdgGAg4WsvVLcktSl7VWSmKKWNDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T16:57:40.741964Z","bundle_sha256":"f203048f0853784fb756e3c3b548bb037592e1abe37c63e41f697b850849a44c"}}