{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:3FO6FLAXJTDHVQQMPHQIB6A3J6","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":"c1b6721b0feb2b346b67ae786e6bb17dbe56a9592f0eaaf79280d9ded8e0bd5c","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-10-28T04:42:56Z","title_canon_sha256":"ac8b8b775c1e17faab4e8563441e004e884d069b576e549d7208a2ce42ef8ebf"},"schema_version":"1.0","source":{"id":"0910.5233","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0910.5233","created_at":"2026-05-18T03:17:54Z"},{"alias_kind":"arxiv_version","alias_value":"0910.5233v2","created_at":"2026-05-18T03:17:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0910.5233","created_at":"2026-05-18T03:17:54Z"},{"alias_kind":"pith_short_12","alias_value":"3FO6FLAXJTDH","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"3FO6FLAXJTDHVQQM","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"3FO6FLAX","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:be6cd59f45ccad59d690e8673cc47616e9051b0b52c1fae04dba59cf1a046cd4","target":"graph","created_at":"2026-05-18T03:17:54Z","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 calculate the distribution of HI within 750 proper kpc/h of a quasar, Lbol = 1.62e13 Lsun, powered by an SMBH, Mbh = 4.47e8 Msun, at z = 3. Our numerical model includes a cosmological hydrodynamic simulation that tracks the self consistent growth and thermal feedback of black holes calculated using GADGET-3 as well as a detailed post-processing ray tracing treatment of the non-uniform ionizing radiation field calculated using SPHRAY, which naturally accounts for the self shielding of optically thick systems. We show that the correct treatment of self shielding introduces a flattening featur","authors_text":"Gabriel Altay, Rupert A. C. Croft, Tiziana Di Matteo","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-10-28T04:42:56Z","title":"Hydrogen Self Shielding in a Quasar Proximity Zone"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.5233","kind":"arxiv","version":2},"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:e3bec85fcce05a47b21138847f304979de154c5aa04c39ec1342fd2e06a8b18b","target":"record","created_at":"2026-05-18T03:17:54Z","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":"c1b6721b0feb2b346b67ae786e6bb17dbe56a9592f0eaaf79280d9ded8e0bd5c","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-10-28T04:42:56Z","title_canon_sha256":"ac8b8b775c1e17faab4e8563441e004e884d069b576e549d7208a2ce42ef8ebf"},"schema_version":"1.0","source":{"id":"0910.5233","kind":"arxiv","version":2}},"canonical_sha256":"d95de2ac174cc67ac20c79e080f81b4fadf41841fa0b2f5749c63291f443a349","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d95de2ac174cc67ac20c79e080f81b4fadf41841fa0b2f5749c63291f443a349","first_computed_at":"2026-05-18T03:17:54.308563Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:17:54.308563Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UC/8bEevz9jIEZ79IZ2yZlON+5DaGDVTnVF4iM77HtHHlzIsjozKOuLeWWz5w2K3hI6qhorWO+7A073IC0R4CA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:17:54.309092Z","signed_message":"canonical_sha256_bytes"},"source_id":"0910.5233","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e3bec85fcce05a47b21138847f304979de154c5aa04c39ec1342fd2e06a8b18b","sha256:be6cd59f45ccad59d690e8673cc47616e9051b0b52c1fae04dba59cf1a046cd4"],"state_sha256":"03a24bd205dfcea289da59fac52365ed101d8b6c49416ca75e5710a218570e90"}