{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2002:4M7Z2EU4G2MM4CUHT5FOK7P6UP","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":"bc60d900ba786ab7a3d84694d137e1590d75b07d602dd3ed657d66feea3d769d","cross_cats_sorted":["gr-qc"],"license":"","primary_cat":"astro-ph","submitted_at":"2002-03-22T15:58:09Z","title_canon_sha256":"1191ce19218067214085142626141218b317b932ea420e50a390dcc108ada41b"},"schema_version":"1.0","source":{"id":"astro-ph/0203403","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0203403","created_at":"2026-07-04T15:26:21Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0203403v1","created_at":"2026-07-04T15:26:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0203403","created_at":"2026-07-04T15:26:21Z"},{"alias_kind":"pith_short_12","alias_value":"4M7Z2EU4G2MM","created_at":"2026-07-04T15:26:21Z"},{"alias_kind":"pith_short_16","alias_value":"4M7Z2EU4G2MM4CUH","created_at":"2026-07-04T15:26:21Z"},{"alias_kind":"pith_short_8","alias_value":"4M7Z2EU4","created_at":"2026-07-04T15:26:21Z"}],"graph_snapshots":[{"event_id":"sha256:d1808589f5d613033c5be94bda797fecc46de126163c3fdd757987aa68222f12","target":"graph","created_at":"2026-07-04T15:26:21Z","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/0203403/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present results from a numerical study of the runaway instability of thick discs around black holes. This instability is an important issue for most models of cosmic gamma-ray bursts, where the central engine responsible for the initial energy release is such a system consisting of a thick disc surrounding a black hole. We have carried out a comprehensive number of time-dependent simulations aimed at exploring the appearance of the instability. Our study has been performed using a fully relativistic hydrodynamics code. The general relativistic hydrodynamic equations are formulated as a hype","authors_text":"Frederic Daigne (MPA & Saclay), Jose A. Font (MPA & Valencia)","cross_cats":["gr-qc"],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2002-03-22T15:58:09Z","title":"The runaway instability of thick discs around black holes. I. The constant angular momentum case"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0203403","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":"sha256:88d12a4a9141a41fbdd8359a14b1d72ea8671208b9c1301cde92214d707b6956","target":"record","created_at":"2026-07-04T15:26:21Z","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":"bc60d900ba786ab7a3d84694d137e1590d75b07d602dd3ed657d66feea3d769d","cross_cats_sorted":["gr-qc"],"license":"","primary_cat":"astro-ph","submitted_at":"2002-03-22T15:58:09Z","title_canon_sha256":"1191ce19218067214085142626141218b317b932ea420e50a390dcc108ada41b"},"schema_version":"1.0","source":{"id":"astro-ph/0203403","kind":"arxiv","version":1}},"canonical_sha256":"e33f9d129c3698ce0a879f4ae57dfea3d2532fe5f6b177de1577fdab0980968a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e33f9d129c3698ce0a879f4ae57dfea3d2532fe5f6b177de1577fdab0980968a","first_computed_at":"2026-07-04T15:26:21.189798Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:26:21.189798Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"tuS9CobvZ5gwhDqXK3AAkhsq0mZZJVC9hJWvzvi7pDKH21mOScTNPzzp9uiv1Cj60psLQVsvRRJ/nBaNMqXsBA==","signature_status":"signed_v1","signed_at":"2026-07-04T15:26:21.190271Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0203403","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:88d12a4a9141a41fbdd8359a14b1d72ea8671208b9c1301cde92214d707b6956","sha256:d1808589f5d613033c5be94bda797fecc46de126163c3fdd757987aa68222f12"],"state_sha256":"8f652fe17dde08811a06467d8ebf52943be6ad9f8d76ea0a6d004061e59dea36"}