{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:EHBQU2O3YETFX2E245RTMSYC4A","short_pith_number":"pith:EHBQU2O3","canonical_record":{"source":{"id":"1304.7126","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-04-26T11:09:36Z","cross_cats_sorted":[],"title_canon_sha256":"bc1c5adc9d15f0a72c864bcec6bd4c3f2da672d9c7521a67d344a4340d4930cf","abstract_canon_sha256":"d159d9cc19689bc7535ba7a8e9e424acfb3d58977e0de176d23519b4809ae31b"},"schema_version":"1.0"},"canonical_sha256":"21c30a69dbc1265be89ae763364b02e014843844954899063c6689de4ba3a30d","source":{"kind":"arxiv","id":"1304.7126","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1304.7126","created_at":"2026-05-18T01:50:21Z"},{"alias_kind":"arxiv_version","alias_value":"1304.7126v2","created_at":"2026-05-18T01:50:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.7126","created_at":"2026-05-18T01:50:21Z"},{"alias_kind":"pith_short_12","alias_value":"EHBQU2O3YETF","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"EHBQU2O3YETFX2E2","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"EHBQU2O3","created_at":"2026-05-18T12:27:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:EHBQU2O3YETFX2E245RTMSYC4A","target":"record","payload":{"canonical_record":{"source":{"id":"1304.7126","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-04-26T11:09:36Z","cross_cats_sorted":[],"title_canon_sha256":"bc1c5adc9d15f0a72c864bcec6bd4c3f2da672d9c7521a67d344a4340d4930cf","abstract_canon_sha256":"d159d9cc19689bc7535ba7a8e9e424acfb3d58977e0de176d23519b4809ae31b"},"schema_version":"1.0"},"canonical_sha256":"21c30a69dbc1265be89ae763364b02e014843844954899063c6689de4ba3a30d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:50:21.457777Z","signature_b64":"dxZzg1StkT9jdB5hWd7G1jbU3PEfvhcJw5rNhjyOWGUOH4Go1aeYeXa3j7XbZLMWpt5xv4tse9yLqWloXd9yAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"21c30a69dbc1265be89ae763364b02e014843844954899063c6689de4ba3a30d","last_reissued_at":"2026-05-18T01:50:21.457031Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:50:21.457031Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1304.7126","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":"2026-05-18T01:50:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+PB5peHVr2ns07J/+rv1w4qmWPdquiHdEk0oExV0PllJbaPjn7ohHubT3udIxnv8hUBtOGb2Sxr3R5OONnhPBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T16:43:21.332092Z"},"content_sha256":"f21eb32d43c74854692a2ee1075176a9e5b584fa9560bf8a30089c06a447894b","schema_version":"1.0","event_id":"sha256:f21eb32d43c74854692a2ee1075176a9e5b584fa9560bf8a30089c06a447894b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:EHBQU2O3YETFX2E245RTMSYC4A","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"RAMSES-RT: Radiation hydrodynamics in the cosmological context","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Dominique Aubert, Jeremy Blaizot, Joakim Rosdahl, Romain Teyssier, Timothy Stranex","submitted_at":"2013-04-26T11:09:36Z","abstract_excerpt":"We present a new implementation of radiation hydrodynamics (RHD) in the adaptive mesh refinement (AMR) code RAMSES. The multi-group radiative transfer (RT) is performed on the AMR grid with a first-order Godunov method using the M1 closure for the Eddington tensor, and is coupled to the hydrodynamics via non-equilibrium thermochemistry of hydrogen and helium. This moment-based approach has the large advantage that the computational cost is independent of the number of radiative sources - it can even deal with continuous regions of emission such as bound-free emission from gas. As it is built d"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.7126","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":"2026-05-18T01:50:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mxN02xDHBV0iPynuNAYDNQPZgns8XWqZe5/w4Nw49iOm2bxMsImPbbxpHqsEf8KfE7XBi+B0QvyTiHl9rwnXBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T16:43:21.332792Z"},"content_sha256":"4de4637564f552336ee70ed520ee5ef629eacc3bce5feb14747e16f27cd22efa","schema_version":"1.0","event_id":"sha256:4de4637564f552336ee70ed520ee5ef629eacc3bce5feb14747e16f27cd22efa"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EHBQU2O3YETFX2E245RTMSYC4A/bundle.json","state_url":"https://pith.science/pith/EHBQU2O3YETFX2E245RTMSYC4A/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EHBQU2O3YETFX2E245RTMSYC4A/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":"2026-05-25T16:43:21Z","links":{"resolver":"https://pith.science/pith/EHBQU2O3YETFX2E245RTMSYC4A","bundle":"https://pith.science/pith/EHBQU2O3YETFX2E245RTMSYC4A/bundle.json","state":"https://pith.science/pith/EHBQU2O3YETFX2E245RTMSYC4A/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EHBQU2O3YETFX2E245RTMSYC4A/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:EHBQU2O3YETFX2E245RTMSYC4A","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":"d159d9cc19689bc7535ba7a8e9e424acfb3d58977e0de176d23519b4809ae31b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-04-26T11:09:36Z","title_canon_sha256":"bc1c5adc9d15f0a72c864bcec6bd4c3f2da672d9c7521a67d344a4340d4930cf"},"schema_version":"1.0","source":{"id":"1304.7126","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1304.7126","created_at":"2026-05-18T01:50:21Z"},{"alias_kind":"arxiv_version","alias_value":"1304.7126v2","created_at":"2026-05-18T01:50:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.7126","created_at":"2026-05-18T01:50:21Z"},{"alias_kind":"pith_short_12","alias_value":"EHBQU2O3YETF","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"EHBQU2O3YETFX2E2","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"EHBQU2O3","created_at":"2026-05-18T12:27:43Z"}],"graph_snapshots":[{"event_id":"sha256:4de4637564f552336ee70ed520ee5ef629eacc3bce5feb14747e16f27cd22efa","target":"graph","created_at":"2026-05-18T01:50:21Z","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"},"paper":{"abstract_excerpt":"We present a new implementation of radiation hydrodynamics (RHD) in the adaptive mesh refinement (AMR) code RAMSES. The multi-group radiative transfer (RT) is performed on the AMR grid with a first-order Godunov method using the M1 closure for the Eddington tensor, and is coupled to the hydrodynamics via non-equilibrium thermochemistry of hydrogen and helium. This moment-based approach has the large advantage that the computational cost is independent of the number of radiative sources - it can even deal with continuous regions of emission such as bound-free emission from gas. As it is built d","authors_text":"Dominique Aubert, Jeremy Blaizot, Joakim Rosdahl, Romain Teyssier, Timothy Stranex","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-04-26T11:09:36Z","title":"RAMSES-RT: Radiation hydrodynamics in the cosmological context"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.7126","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:f21eb32d43c74854692a2ee1075176a9e5b584fa9560bf8a30089c06a447894b","target":"record","created_at":"2026-05-18T01:50:21Z","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":"d159d9cc19689bc7535ba7a8e9e424acfb3d58977e0de176d23519b4809ae31b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-04-26T11:09:36Z","title_canon_sha256":"bc1c5adc9d15f0a72c864bcec6bd4c3f2da672d9c7521a67d344a4340d4930cf"},"schema_version":"1.0","source":{"id":"1304.7126","kind":"arxiv","version":2}},"canonical_sha256":"21c30a69dbc1265be89ae763364b02e014843844954899063c6689de4ba3a30d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"21c30a69dbc1265be89ae763364b02e014843844954899063c6689de4ba3a30d","first_computed_at":"2026-05-18T01:50:21.457031Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:50:21.457031Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dxZzg1StkT9jdB5hWd7G1jbU3PEfvhcJw5rNhjyOWGUOH4Go1aeYeXa3j7XbZLMWpt5xv4tse9yLqWloXd9yAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:50:21.457777Z","signed_message":"canonical_sha256_bytes"},"source_id":"1304.7126","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f21eb32d43c74854692a2ee1075176a9e5b584fa9560bf8a30089c06a447894b","sha256:4de4637564f552336ee70ed520ee5ef629eacc3bce5feb14747e16f27cd22efa"],"state_sha256":"ced8f96f1d2550bec0da5162d8a71ea0c091eb13b2e2f925d19044ff4b278de6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Bah5Lm5T6a+r6E7mn5TS7TQ1jD8Xo0FUo3VSwnLth1hve2TvAwkf7MW/1RFkwkOqif5dX61pPkw2MTYGQfmVAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T16:43:21.336677Z","bundle_sha256":"da5038401d8fef73e4d40ec3c5b31b12fa3dc88becf8c81ef9165cacaac39a38"}}