{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:PS2DANRBYYTRLOL2IJJXMCUAHN","short_pith_number":"pith:PS2DANRB","canonical_record":{"source":{"id":"1803.01634","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-03-05T12:38:49Z","cross_cats_sorted":[],"title_canon_sha256":"557b49aad48fed692da6c50df676b090722801001bb194b65c2d196c4c2012d8","abstract_canon_sha256":"930c871b715123393696d492fe37b02ec78d4c24799b8e93c37a9edad31427be"},"schema_version":"1.0"},"canonical_sha256":"7cb4303621c62715b97a4253760a803b65b96beed2e8dafbd1e417944977f7f5","source":{"kind":"arxiv","id":"1803.01634","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.01634","created_at":"2026-05-17T23:54:11Z"},{"alias_kind":"arxiv_version","alias_value":"1803.01634v2","created_at":"2026-05-17T23:54:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.01634","created_at":"2026-05-17T23:54:11Z"},{"alias_kind":"pith_short_12","alias_value":"PS2DANRBYYTR","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_16","alias_value":"PS2DANRBYYTRLOL2","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_8","alias_value":"PS2DANRB","created_at":"2026-05-18T12:32:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:PS2DANRBYYTRLOL2IJJXMCUAHN","target":"record","payload":{"canonical_record":{"source":{"id":"1803.01634","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-03-05T12:38:49Z","cross_cats_sorted":[],"title_canon_sha256":"557b49aad48fed692da6c50df676b090722801001bb194b65c2d196c4c2012d8","abstract_canon_sha256":"930c871b715123393696d492fe37b02ec78d4c24799b8e93c37a9edad31427be"},"schema_version":"1.0"},"canonical_sha256":"7cb4303621c62715b97a4253760a803b65b96beed2e8dafbd1e417944977f7f5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:54:11.592501Z","signature_b64":"RQDNIO0hoEe14LqJggXsVXNbI6PoVIkI0z1OgPhm6WsIpRZn5yc4H3llgz4kHOkq7aCxX1Rfao6+FXS/9Lm0Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7cb4303621c62715b97a4253760a803b65b96beed2e8dafbd1e417944977f7f5","last_reissued_at":"2026-05-17T23:54:11.591874Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:54:11.591874Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1803.01634","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":"2026-05-17T23:54:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ze9B6+lBFRIGBH4HrEW7H8Of0udz5UqK6/ImMxJ0JY2m2w2pVM/K2fHhfvvefMEVgkHzjYAVU9CI18XnLzQpAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T13:07:43.765623Z"},"content_sha256":"c28d3c087f36e55411cbf0ad0fdd67273b37df8ff06d62586fae307330228df7","schema_version":"1.0","event_id":"sha256:c28d3c087f36e55411cbf0ad0fdd67273b37df8ff06d62586fae307330228df7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:PS2DANRBYYTRLOL2IJJXMCUAHN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Impact of the reduced speed of light approximation on ionization front velocities in cosmological simulations of the epoch of reionization","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Dominique Aubert, Jonathan Chardin, Joseph Lewis, Nicolas Deparis, Pierre Ocvirk","submitted_at":"2018-03-05T12:38:49Z","abstract_excerpt":"Coupled radiative-hydrodynamics simulations of the epoch of reionization aim to reproduce the propagation of ionization fronts during the transition before the overlap of HII regions. Many of these simulations use moment-based methods to track radiative transfer processes using explicit solvers and are therefore subject to strict stability conditions regarding the speed of light, which implies a great computational cost. It can be reduced by assuming a reduced speed of light, and this approximation is now widely used to produce large-scale simulations of reionization. We introduce a new method"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.01634","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":"2026-05-17T23:54:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bdKq7Oha74nn2LuP9kgbQXLl/ay7iVV1p4VlTk6rR40hLVpuN1lbTM4P+fkjHZKtRzu2NE7uKdtrgS+iOgGaDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T13:07:43.765968Z"},"content_sha256":"104865d704ab1a4bceb54d2d7f1e122b576b5d5e35e3c618f4869bd1e068cf5f","schema_version":"1.0","event_id":"sha256:104865d704ab1a4bceb54d2d7f1e122b576b5d5e35e3c618f4869bd1e068cf5f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PS2DANRBYYTRLOL2IJJXMCUAHN/bundle.json","state_url":"https://pith.science/pith/PS2DANRBYYTRLOL2IJJXMCUAHN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PS2DANRBYYTRLOL2IJJXMCUAHN/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":"2026-06-02T13:07:43Z","links":{"resolver":"https://pith.science/pith/PS2DANRBYYTRLOL2IJJXMCUAHN","bundle":"https://pith.science/pith/PS2DANRBYYTRLOL2IJJXMCUAHN/bundle.json","state":"https://pith.science/pith/PS2DANRBYYTRLOL2IJJXMCUAHN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PS2DANRBYYTRLOL2IJJXMCUAHN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:PS2DANRBYYTRLOL2IJJXMCUAHN","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":"930c871b715123393696d492fe37b02ec78d4c24799b8e93c37a9edad31427be","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-03-05T12:38:49Z","title_canon_sha256":"557b49aad48fed692da6c50df676b090722801001bb194b65c2d196c4c2012d8"},"schema_version":"1.0","source":{"id":"1803.01634","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.01634","created_at":"2026-05-17T23:54:11Z"},{"alias_kind":"arxiv_version","alias_value":"1803.01634v2","created_at":"2026-05-17T23:54:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.01634","created_at":"2026-05-17T23:54:11Z"},{"alias_kind":"pith_short_12","alias_value":"PS2DANRBYYTR","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_16","alias_value":"PS2DANRBYYTRLOL2","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_8","alias_value":"PS2DANRB","created_at":"2026-05-18T12:32:46Z"}],"graph_snapshots":[{"event_id":"sha256:104865d704ab1a4bceb54d2d7f1e122b576b5d5e35e3c618f4869bd1e068cf5f","target":"graph","created_at":"2026-05-17T23:54:11Z","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":"Coupled radiative-hydrodynamics simulations of the epoch of reionization aim to reproduce the propagation of ionization fronts during the transition before the overlap of HII regions. Many of these simulations use moment-based methods to track radiative transfer processes using explicit solvers and are therefore subject to strict stability conditions regarding the speed of light, which implies a great computational cost. It can be reduced by assuming a reduced speed of light, and this approximation is now widely used to produce large-scale simulations of reionization. We introduce a new method","authors_text":"Dominique Aubert, Jonathan Chardin, Joseph Lewis, Nicolas Deparis, Pierre Ocvirk","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-03-05T12:38:49Z","title":"Impact of the reduced speed of light approximation on ionization front velocities in cosmological simulations of the epoch of reionization"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.01634","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:c28d3c087f36e55411cbf0ad0fdd67273b37df8ff06d62586fae307330228df7","target":"record","created_at":"2026-05-17T23:54:11Z","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":"930c871b715123393696d492fe37b02ec78d4c24799b8e93c37a9edad31427be","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-03-05T12:38:49Z","title_canon_sha256":"557b49aad48fed692da6c50df676b090722801001bb194b65c2d196c4c2012d8"},"schema_version":"1.0","source":{"id":"1803.01634","kind":"arxiv","version":2}},"canonical_sha256":"7cb4303621c62715b97a4253760a803b65b96beed2e8dafbd1e417944977f7f5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7cb4303621c62715b97a4253760a803b65b96beed2e8dafbd1e417944977f7f5","first_computed_at":"2026-05-17T23:54:11.591874Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:54:11.591874Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RQDNIO0hoEe14LqJggXsVXNbI6PoVIkI0z1OgPhm6WsIpRZn5yc4H3llgz4kHOkq7aCxX1Rfao6+FXS/9Lm0Cg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:54:11.592501Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.01634","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c28d3c087f36e55411cbf0ad0fdd67273b37df8ff06d62586fae307330228df7","sha256:104865d704ab1a4bceb54d2d7f1e122b576b5d5e35e3c618f4869bd1e068cf5f"],"state_sha256":"878fa9234c81a4a979e3636b83599f62ff907c304004a80af2f96d94dd970b5a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ray7PhPa0aa9QnaobnsVmeW27Q0YmDdwRijE33d3trCKCxaVsRUDQJZjSzlzm13MN53Cv0loGT4vLHT0HU/ICw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T13:07:43.767841Z","bundle_sha256":"d4692c782880361f805c96806f8d1071fe29cd336fe9a4b51fe6eac24f75e926"}}