{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:CSHRSFDCSCTXJRDDEXG3V7MFVD","short_pith_number":"pith:CSHRSFDC","canonical_record":{"source":{"id":"1012.4014","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-12-17T21:00:10Z","cross_cats_sorted":[],"title_canon_sha256":"c33a4f08343349699479ed69840e6b3b17daa5650964727ba2d2b93e06ca6d19","abstract_canon_sha256":"188aee6c2e9de22ad99868998b5d821910bdb9a41229148ba1cc305511f1a3c5"},"schema_version":"1.0"},"canonical_sha256":"148f19146290a774c46325cdbafd85a8e55834f613027891c6abfa180f220bc5","source":{"kind":"arxiv","id":"1012.4014","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1012.4014","created_at":"2026-05-18T04:16:22Z"},{"alias_kind":"arxiv_version","alias_value":"1012.4014v2","created_at":"2026-05-18T04:16:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1012.4014","created_at":"2026-05-18T04:16:22Z"},{"alias_kind":"pith_short_12","alias_value":"CSHRSFDCSCTX","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_16","alias_value":"CSHRSFDCSCTXJRDD","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_8","alias_value":"CSHRSFDC","created_at":"2026-05-18T12:26:06Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:CSHRSFDCSCTXJRDDEXG3V7MFVD","target":"record","payload":{"canonical_record":{"source":{"id":"1012.4014","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-12-17T21:00:10Z","cross_cats_sorted":[],"title_canon_sha256":"c33a4f08343349699479ed69840e6b3b17daa5650964727ba2d2b93e06ca6d19","abstract_canon_sha256":"188aee6c2e9de22ad99868998b5d821910bdb9a41229148ba1cc305511f1a3c5"},"schema_version":"1.0"},"canonical_sha256":"148f19146290a774c46325cdbafd85a8e55834f613027891c6abfa180f220bc5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:16:22.694159Z","signature_b64":"NInn1boDu0yNbyRbLh1uLroKc+2YT2TUqNNi+zBD5EUHOWizOssJ/GL9Ii6qFKomnaNCKau7L6TGxCE+FtflCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"148f19146290a774c46325cdbafd85a8e55834f613027891c6abfa180f220bc5","last_reissued_at":"2026-05-18T04:16:22.693539Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:16:22.693539Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1012.4014","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:16:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PHzD9d9XyYPMkXg3kneexvdB93YkOjn5gXZVrZmLDBQo85B1W11lErMSME6zjnrnvlVO+vqh19XDeQ+85N7JDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T22:31:01.704150Z"},"content_sha256":"8a35752b4f24f967cb45bb8fb26c0b45cffbaa63812cb9c030b440c3a42e2d7f","schema_version":"1.0","event_id":"sha256:8a35752b4f24f967cb45bb8fb26c0b45cffbaa63812cb9c030b440c3a42e2d7f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:CSHRSFDCSCTXJRDDEXG3V7MFVD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Through Thick and Thin - HI Absorption in Cosmological Simulations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Claudio Dalla Vecchia, Gabriel Altay, Joop Schaye, Neil H. M. Crighton, Tom Theuns","submitted_at":"2010-12-17T21:00:10Z","abstract_excerpt":"We investigate the column density distribution function of neutral hydrogen at redshift z = 3 using a cosmological simulation of galaxy formation from the OverWhelmingly Large Simulations (OWLS) project. The base simulation includes gravity, hydrodynamics, star formation, supernovae feedback, stellar winds, chemodynamics, and element-by-element cooling in the presence of a uniform UV background. Self-shielding and formation of molecular hydrogen are treated in post-processing, without introducing any free parameters, using an accurate reverse ray-tracing algorithm and an empirical relation bet"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1012.4014","kind":"arxiv","version":2},"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":"2026-05-18T04:16:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DsNJkqS8rtCI8VR67SqXF82UjbReNq/PxhT9T0V124jdFWXgcDn3gRbVnHaYPOssscU/iQF7PaPB4IgqR5TCDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T22:31:01.704506Z"},"content_sha256":"59494a968b0aa6189a487de5675612a743a23b8ba2e71a4cce1090323df4a47d","schema_version":"1.0","event_id":"sha256:59494a968b0aa6189a487de5675612a743a23b8ba2e71a4cce1090323df4a47d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CSHRSFDCSCTXJRDDEXG3V7MFVD/bundle.json","state_url":"https://pith.science/pith/CSHRSFDCSCTXJRDDEXG3V7MFVD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CSHRSFDCSCTXJRDDEXG3V7MFVD/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":"2026-06-01T22:31:01Z","links":{"resolver":"https://pith.science/pith/CSHRSFDCSCTXJRDDEXG3V7MFVD","bundle":"https://pith.science/pith/CSHRSFDCSCTXJRDDEXG3V7MFVD/bundle.json","state":"https://pith.science/pith/CSHRSFDCSCTXJRDDEXG3V7MFVD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CSHRSFDCSCTXJRDDEXG3V7MFVD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:CSHRSFDCSCTXJRDDEXG3V7MFVD","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":"188aee6c2e9de22ad99868998b5d821910bdb9a41229148ba1cc305511f1a3c5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-12-17T21:00:10Z","title_canon_sha256":"c33a4f08343349699479ed69840e6b3b17daa5650964727ba2d2b93e06ca6d19"},"schema_version":"1.0","source":{"id":"1012.4014","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1012.4014","created_at":"2026-05-18T04:16:22Z"},{"alias_kind":"arxiv_version","alias_value":"1012.4014v2","created_at":"2026-05-18T04:16:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1012.4014","created_at":"2026-05-18T04:16:22Z"},{"alias_kind":"pith_short_12","alias_value":"CSHRSFDCSCTX","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_16","alias_value":"CSHRSFDCSCTXJRDD","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_8","alias_value":"CSHRSFDC","created_at":"2026-05-18T12:26:06Z"}],"graph_snapshots":[{"event_id":"sha256:59494a968b0aa6189a487de5675612a743a23b8ba2e71a4cce1090323df4a47d","target":"graph","created_at":"2026-05-18T04:16:22Z","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 investigate the column density distribution function of neutral hydrogen at redshift z = 3 using a cosmological simulation of galaxy formation from the OverWhelmingly Large Simulations (OWLS) project. The base simulation includes gravity, hydrodynamics, star formation, supernovae feedback, stellar winds, chemodynamics, and element-by-element cooling in the presence of a uniform UV background. Self-shielding and formation of molecular hydrogen are treated in post-processing, without introducing any free parameters, using an accurate reverse ray-tracing algorithm and an empirical relation bet","authors_text":"Claudio Dalla Vecchia, Gabriel Altay, Joop Schaye, Neil H. M. Crighton, Tom Theuns","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-12-17T21:00:10Z","title":"Through Thick and Thin - HI Absorption in Cosmological Simulations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1012.4014","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":"sha256:8a35752b4f24f967cb45bb8fb26c0b45cffbaa63812cb9c030b440c3a42e2d7f","target":"record","created_at":"2026-05-18T04:16:22Z","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":"188aee6c2e9de22ad99868998b5d821910bdb9a41229148ba1cc305511f1a3c5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-12-17T21:00:10Z","title_canon_sha256":"c33a4f08343349699479ed69840e6b3b17daa5650964727ba2d2b93e06ca6d19"},"schema_version":"1.0","source":{"id":"1012.4014","kind":"arxiv","version":2}},"canonical_sha256":"148f19146290a774c46325cdbafd85a8e55834f613027891c6abfa180f220bc5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"148f19146290a774c46325cdbafd85a8e55834f613027891c6abfa180f220bc5","first_computed_at":"2026-05-18T04:16:22.693539Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:16:22.693539Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NInn1boDu0yNbyRbLh1uLroKc+2YT2TUqNNi+zBD5EUHOWizOssJ/GL9Ii6qFKomnaNCKau7L6TGxCE+FtflCg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:16:22.694159Z","signed_message":"canonical_sha256_bytes"},"source_id":"1012.4014","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8a35752b4f24f967cb45bb8fb26c0b45cffbaa63812cb9c030b440c3a42e2d7f","sha256:59494a968b0aa6189a487de5675612a743a23b8ba2e71a4cce1090323df4a47d"],"state_sha256":"062e3b3076d68575f538388258ffce6ca68b7654d0b58d327bc9dd89a57b3486"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"s+A+plZY9sx4rlru2R6FZrIEg5frCp8xAr3hdbDYPvEgKa3lZ0NQqpwS7GO2MRG9uXDiZR++AYxn7vDt39bCCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T22:31:01.706525Z","bundle_sha256":"80ea7827e9f300168403d5c589832ee7bc0cea6d7eb55b9be4c2f40f0aa41364"}}