{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:6P52XFZ7W3F54OZGXWGIOT3U7P","short_pith_number":"pith:6P52XFZ7","canonical_record":{"source":{"id":"1102.2456","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-02-11T23:08:19Z","cross_cats_sorted":[],"title_canon_sha256":"df40e7c4b4354a6447c58bfdc0702309460044694a1f50d3904e2211e5672573","abstract_canon_sha256":"56036eca1ef5e4c7a71085133c7d9bb2b1b23862e8ffdd016be33d35674068bd"},"schema_version":"1.0"},"canonical_sha256":"f3fbab973fb6cbde3b26bd8c874f74fbc62372e1ac510502c59589cfc23b5a89","source":{"kind":"arxiv","id":"1102.2456","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1102.2456","created_at":"2026-05-18T02:03:11Z"},{"alias_kind":"arxiv_version","alias_value":"1102.2456v1","created_at":"2026-05-18T02:03:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1102.2456","created_at":"2026-05-18T02:03:11Z"},{"alias_kind":"pith_short_12","alias_value":"6P52XFZ7W3F5","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_16","alias_value":"6P52XFZ7W3F54OZG","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_8","alias_value":"6P52XFZ7","created_at":"2026-05-18T12:26:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:6P52XFZ7W3F54OZGXWGIOT3U7P","target":"record","payload":{"canonical_record":{"source":{"id":"1102.2456","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-02-11T23:08:19Z","cross_cats_sorted":[],"title_canon_sha256":"df40e7c4b4354a6447c58bfdc0702309460044694a1f50d3904e2211e5672573","abstract_canon_sha256":"56036eca1ef5e4c7a71085133c7d9bb2b1b23862e8ffdd016be33d35674068bd"},"schema_version":"1.0"},"canonical_sha256":"f3fbab973fb6cbde3b26bd8c874f74fbc62372e1ac510502c59589cfc23b5a89","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:03:11.827149Z","signature_b64":"2HhzTP/V28nSLrAU0pjb2G/GCdmmrbXzrafm1Vqby7UBg1xtHyJ8lp5bm6BTr2hOLLBbCJ8T+CShJle7qOUSBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f3fbab973fb6cbde3b26bd8c874f74fbc62372e1ac510502c59589cfc23b5a89","last_reissued_at":"2026-05-18T02:03:11.826504Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:03:11.826504Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1102.2456","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":"2026-05-18T02:03:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d7LvBnChUPZ4bNzrL0gMtiNPQ4AJlJkLwlo56/qobAT/3uHne93GLo6U6XeHuCjMHF133HI25h4lzz22LLx0Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T10:47:57.402403Z"},"content_sha256":"5dbd23c9b1f6fc10d6e9bfb3ec14a495651780eba8e4387ff089371c8389488f","schema_version":"1.0","event_id":"sha256:5dbd23c9b1f6fc10d6e9bfb3ec14a495651780eba8e4387ff089371c8389488f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:6P52XFZ7W3F54OZGXWGIOT3U7P","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spinning up black holes with super-critical accretion flows","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Aleksander Sadowski, Jean-Pierre Lasota, Marek Abramowicz, Michal Bursa, Mohammadtaher Safarzadeh, Rafal Moderski, Wlodek Kluzniak","submitted_at":"2011-02-11T23:08:19Z","abstract_excerpt":"We study the process of spinning up black holes by accretion from slim disks in a wide range of accretion rates. We show that for super-Eddington accretion rates and low values of the viscosity parameter alpha (\\lesssim 0.01) the limiting value of the dimensionless spin parameter a_* can reach values higher than a_*=0.9978 inferred by Thorne (1974) in his seminal study. For \\mdot=10\\mdot_{Edd} and alpha=0.01 spin equilibrium is reached at a_*=0.9994. We show that the equilibrium spin value depends strongly on the assumed value of alpha. We also prove that for high accretion rates the impact of"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1102.2456","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":"2026-05-18T02:03:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vmP6zgQdRn0Z3i3ts/Gd6IZ8WeJc/ElSxqutql6xT1tKo7v8NoW7QAAd/ivT4HPitIFfJKLPDvuOn+CCYFwFCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T10:47:57.403013Z"},"content_sha256":"44b450617d79587ce4cf61708f7737c3a1905be1fd1a69e8b59f07974dcd4de5","schema_version":"1.0","event_id":"sha256:44b450617d79587ce4cf61708f7737c3a1905be1fd1a69e8b59f07974dcd4de5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6P52XFZ7W3F54OZGXWGIOT3U7P/bundle.json","state_url":"https://pith.science/pith/6P52XFZ7W3F54OZGXWGIOT3U7P/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6P52XFZ7W3F54OZGXWGIOT3U7P/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":"2026-05-30T10:47:57Z","links":{"resolver":"https://pith.science/pith/6P52XFZ7W3F54OZGXWGIOT3U7P","bundle":"https://pith.science/pith/6P52XFZ7W3F54OZGXWGIOT3U7P/bundle.json","state":"https://pith.science/pith/6P52XFZ7W3F54OZGXWGIOT3U7P/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6P52XFZ7W3F54OZGXWGIOT3U7P/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:6P52XFZ7W3F54OZGXWGIOT3U7P","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":"56036eca1ef5e4c7a71085133c7d9bb2b1b23862e8ffdd016be33d35674068bd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-02-11T23:08:19Z","title_canon_sha256":"df40e7c4b4354a6447c58bfdc0702309460044694a1f50d3904e2211e5672573"},"schema_version":"1.0","source":{"id":"1102.2456","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1102.2456","created_at":"2026-05-18T02:03:11Z"},{"alias_kind":"arxiv_version","alias_value":"1102.2456v1","created_at":"2026-05-18T02:03:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1102.2456","created_at":"2026-05-18T02:03:11Z"},{"alias_kind":"pith_short_12","alias_value":"6P52XFZ7W3F5","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_16","alias_value":"6P52XFZ7W3F54OZG","created_at":"2026-05-18T12:26:22Z"},{"alias_kind":"pith_short_8","alias_value":"6P52XFZ7","created_at":"2026-05-18T12:26:22Z"}],"graph_snapshots":[{"event_id":"sha256:44b450617d79587ce4cf61708f7737c3a1905be1fd1a69e8b59f07974dcd4de5","target":"graph","created_at":"2026-05-18T02:03:11Z","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":"We study the process of spinning up black holes by accretion from slim disks in a wide range of accretion rates. We show that for super-Eddington accretion rates and low values of the viscosity parameter alpha (\\lesssim 0.01) the limiting value of the dimensionless spin parameter a_* can reach values higher than a_*=0.9978 inferred by Thorne (1974) in his seminal study. For \\mdot=10\\mdot_{Edd} and alpha=0.01 spin equilibrium is reached at a_*=0.9994. We show that the equilibrium spin value depends strongly on the assumed value of alpha. We also prove that for high accretion rates the impact of","authors_text":"Aleksander Sadowski, Jean-Pierre Lasota, Marek Abramowicz, Michal Bursa, Mohammadtaher Safarzadeh, Rafal Moderski, Wlodek Kluzniak","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-02-11T23:08:19Z","title":"Spinning up black holes with super-critical accretion flows"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1102.2456","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":"sha256:5dbd23c9b1f6fc10d6e9bfb3ec14a495651780eba8e4387ff089371c8389488f","target":"record","created_at":"2026-05-18T02:03:11Z","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":"56036eca1ef5e4c7a71085133c7d9bb2b1b23862e8ffdd016be33d35674068bd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-02-11T23:08:19Z","title_canon_sha256":"df40e7c4b4354a6447c58bfdc0702309460044694a1f50d3904e2211e5672573"},"schema_version":"1.0","source":{"id":"1102.2456","kind":"arxiv","version":1}},"canonical_sha256":"f3fbab973fb6cbde3b26bd8c874f74fbc62372e1ac510502c59589cfc23b5a89","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f3fbab973fb6cbde3b26bd8c874f74fbc62372e1ac510502c59589cfc23b5a89","first_computed_at":"2026-05-18T02:03:11.826504Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:03:11.826504Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2HhzTP/V28nSLrAU0pjb2G/GCdmmrbXzrafm1Vqby7UBg1xtHyJ8lp5bm6BTr2hOLLBbCJ8T+CShJle7qOUSBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:03:11.827149Z","signed_message":"canonical_sha256_bytes"},"source_id":"1102.2456","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5dbd23c9b1f6fc10d6e9bfb3ec14a495651780eba8e4387ff089371c8389488f","sha256:44b450617d79587ce4cf61708f7737c3a1905be1fd1a69e8b59f07974dcd4de5"],"state_sha256":"89f664f05761eab34ca376bf928456770a3607d7f92897fe8cfff27fa4906676"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LeUSG9G5vTHU+pvnj0CjQY9cqsF8WQ9PpoILTQKt2lOHgpVrw6MXuSigjqjqUMmuSrqSp5t+DJoIZzAKhWNTAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T10:47:57.406251Z","bundle_sha256":"7c875b9c62e8389c791ce456366c7e6a7e7317ded403cabdd1764520bc3e2815"}}