{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1999:SQLKIUZPC5FNZMCE4GUAAEVN5F","short_pith_number":"pith:SQLKIUZP","canonical_record":{"source":{"id":"astro-ph/9901108","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1999-01-10T16:51:57Z","cross_cats_sorted":[],"title_canon_sha256":"63ba7edd9e017d2fa45e2695b6b21f158a17ee51f5cfca934eed19d4e1b9862c","abstract_canon_sha256":"cb7651f47f0a6f3c051ad1939cb7a9f378500d009a44a80ab0bc510a4e52e525"},"schema_version":"1.0"},"canonical_sha256":"9416a4532f174adcb044e1a80012ade95a392bdfc4f9b3ff3e7769c681b2c433","source":{"kind":"arxiv","id":"astro-ph/9901108","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9901108","created_at":"2026-07-04T14:16:28Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9901108v1","created_at":"2026-07-04T14:16:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9901108","created_at":"2026-07-04T14:16:28Z"},{"alias_kind":"pith_short_12","alias_value":"SQLKIUZPC5FN","created_at":"2026-07-04T14:16:28Z"},{"alias_kind":"pith_short_16","alias_value":"SQLKIUZPC5FNZMCE","created_at":"2026-07-04T14:16:28Z"},{"alias_kind":"pith_short_8","alias_value":"SQLKIUZP","created_at":"2026-07-04T14:16:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1999:SQLKIUZPC5FNZMCE4GUAAEVN5F","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9901108","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1999-01-10T16:51:57Z","cross_cats_sorted":[],"title_canon_sha256":"63ba7edd9e017d2fa45e2695b6b21f158a17ee51f5cfca934eed19d4e1b9862c","abstract_canon_sha256":"cb7651f47f0a6f3c051ad1939cb7a9f378500d009a44a80ab0bc510a4e52e525"},"schema_version":"1.0"},"canonical_sha256":"9416a4532f174adcb044e1a80012ade95a392bdfc4f9b3ff3e7769c681b2c433","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T14:16:28.844836Z","signature_b64":"pS0gzveKYdg5eMayoP8J3yiQuK/Z1Jq9NquxgaBwlb3WtqzhHnRNaaCoLtvUowgDkXpGJjm8yUEiT/yFBuDwAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9416a4532f174adcb044e1a80012ade95a392bdfc4f9b3ff3e7769c681b2c433","last_reissued_at":"2026-07-04T14:16:28.844445Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T14:16:28.844445Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9901108","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":"2026-07-04T14:16:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d0N8SLe89C/TolJqzHNOrIYzj9qjbZk3vZ7E7naBx0vOrbcCI0POfYTcR9m7BA979M15/rrKpsk1FhEDv8jBAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T15:58:06.825474Z"},"content_sha256":"b541660060da0dca01ed17ad7d6c9d5c4f9dd51f2ff356ddb1471ca861830f36","schema_version":"1.0","event_id":"sha256:b541660060da0dca01ed17ad7d6c9d5c4f9dd51f2ff356ddb1471ca861830f36"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1999:SQLKIUZPC5FNZMCE4GUAAEVN5F","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Accretion Disk Models","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Andrei M. Beloborodov","submitted_at":"1999-01-10T16:51:57Z","abstract_excerpt":"Models of black hole accretion disks are reviewed, with an emphasis on the theory of hard X-ray production. The following models are considered: i) standard, ii) super-critical, iii) two-temperature, and iv) disk+corona. New developments have recently been made in hydrodynamical models of accretion and in phenomenological radiative models fitting the observed X-ray spectra. Attempts to unify the two approaches are only partly successful."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9901108","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/9901108/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":"2026-07-04T14:16:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0zeklXNZu8lU7cIGh8ItyRlecxtrXE4fuFcR1C+P/Ce5FB0BdJHbqm2kapVJyBr6ojYl3mLjxiSmvW8RnM2iAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T15:58:06.825974Z"},"content_sha256":"78a875598d20c396deee3540f4d60ecd87960ac60914a0776f96787770847d81","schema_version":"1.0","event_id":"sha256:78a875598d20c396deee3540f4d60ecd87960ac60914a0776f96787770847d81"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SQLKIUZPC5FNZMCE4GUAAEVN5F/bundle.json","state_url":"https://pith.science/pith/SQLKIUZPC5FNZMCE4GUAAEVN5F/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SQLKIUZPC5FNZMCE4GUAAEVN5F/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":"2026-08-09T15:58:06Z","links":{"resolver":"https://pith.science/pith/SQLKIUZPC5FNZMCE4GUAAEVN5F","bundle":"https://pith.science/pith/SQLKIUZPC5FNZMCE4GUAAEVN5F/bundle.json","state":"https://pith.science/pith/SQLKIUZPC5FNZMCE4GUAAEVN5F/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SQLKIUZPC5FNZMCE4GUAAEVN5F/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1999:SQLKIUZPC5FNZMCE4GUAAEVN5F","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":"cb7651f47f0a6f3c051ad1939cb7a9f378500d009a44a80ab0bc510a4e52e525","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1999-01-10T16:51:57Z","title_canon_sha256":"63ba7edd9e017d2fa45e2695b6b21f158a17ee51f5cfca934eed19d4e1b9862c"},"schema_version":"1.0","source":{"id":"astro-ph/9901108","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9901108","created_at":"2026-07-04T14:16:28Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9901108v1","created_at":"2026-07-04T14:16:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9901108","created_at":"2026-07-04T14:16:28Z"},{"alias_kind":"pith_short_12","alias_value":"SQLKIUZPC5FN","created_at":"2026-07-04T14:16:28Z"},{"alias_kind":"pith_short_16","alias_value":"SQLKIUZPC5FNZMCE","created_at":"2026-07-04T14:16:28Z"},{"alias_kind":"pith_short_8","alias_value":"SQLKIUZP","created_at":"2026-07-04T14:16:28Z"}],"graph_snapshots":[{"event_id":"sha256:78a875598d20c396deee3540f4d60ecd87960ac60914a0776f96787770847d81","target":"graph","created_at":"2026-07-04T14:16:28Z","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/astro-ph/9901108/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Models of black hole accretion disks are reviewed, with an emphasis on the theory of hard X-ray production. The following models are considered: i) standard, ii) super-critical, iii) two-temperature, and iv) disk+corona. New developments have recently been made in hydrodynamical models of accretion and in phenomenological radiative models fitting the observed X-ray spectra. Attempts to unify the two approaches are only partly successful.","authors_text":"Andrei M. Beloborodov","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1999-01-10T16:51:57Z","title":"Accretion Disk Models"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9901108","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:b541660060da0dca01ed17ad7d6c9d5c4f9dd51f2ff356ddb1471ca861830f36","target":"record","created_at":"2026-07-04T14:16:28Z","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":"cb7651f47f0a6f3c051ad1939cb7a9f378500d009a44a80ab0bc510a4e52e525","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1999-01-10T16:51:57Z","title_canon_sha256":"63ba7edd9e017d2fa45e2695b6b21f158a17ee51f5cfca934eed19d4e1b9862c"},"schema_version":"1.0","source":{"id":"astro-ph/9901108","kind":"arxiv","version":1}},"canonical_sha256":"9416a4532f174adcb044e1a80012ade95a392bdfc4f9b3ff3e7769c681b2c433","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9416a4532f174adcb044e1a80012ade95a392bdfc4f9b3ff3e7769c681b2c433","first_computed_at":"2026-07-04T14:16:28.844445Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T14:16:28.844445Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"pS0gzveKYdg5eMayoP8J3yiQuK/Z1Jq9NquxgaBwlb3WtqzhHnRNaaCoLtvUowgDkXpGJjm8yUEiT/yFBuDwAw==","signature_status":"signed_v1","signed_at":"2026-07-04T14:16:28.844836Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9901108","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b541660060da0dca01ed17ad7d6c9d5c4f9dd51f2ff356ddb1471ca861830f36","sha256:78a875598d20c396deee3540f4d60ecd87960ac60914a0776f96787770847d81"],"state_sha256":"1bb94f5d1f8350f64ab80b52555ae2793aa26f909a24d2a9f5948a6c3e9d24af"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Va09lMvhbcjsZW9eZu2popgBYIOw4rj3+TSPgURFNWmi7JTiAMY/exZ3xKtNPgzfNmXWRZg7XMPUaiVk4i7dCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-09T15:58:06.830920Z","bundle_sha256":"90bf38bea4303abc47ce3fcf084c4c744cbbfdb6441c834e06f321b5029c6af6"}}