{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:XYJ6IA5WYYIP7VWERTNV6ZFCXM","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":"badae9afba1c06f1389245d11ec8bae5792bebe6317224485255a067cb892a57","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-06-08T06:47:31Z","title_canon_sha256":"7515a1463cc350f86049298c461859f1384cea92e9cdc323a6b7142790575362"},"schema_version":"1.0","source":{"id":"2506.07017","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2506.07017","created_at":"2026-07-05T11:57:37Z"},{"alias_kind":"arxiv_version","alias_value":"2506.07017v2","created_at":"2026-07-05T11:57:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.07017","created_at":"2026-07-05T11:57:37Z"},{"alias_kind":"pith_short_12","alias_value":"XYJ6IA5WYYIP","created_at":"2026-07-05T11:57:37Z"},{"alias_kind":"pith_short_16","alias_value":"XYJ6IA5WYYIP7VWE","created_at":"2026-07-05T11:57:37Z"},{"alias_kind":"pith_short_8","alias_value":"XYJ6IA5W","created_at":"2026-07-05T11:57:37Z"}],"graph_snapshots":[{"event_id":"sha256:fc188df70381cdf7269731e1b101be43eb2f545118ebe9eb194872132eafcf25","target":"graph","created_at":"2026-07-05T11:57:37Z","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/2506.07017/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We investigate key methodologies of Bhatnagar-Gross-Krook subgrid modeling for neutrino fast flavor conversions (FFC) in core-collapse supernova based on spherically symmetric Boltzmann radiation hydrodynamics simulations. We first examine time integration methods (explicit, implicit, or semi-implicit) and time step control for the subgrid term, and then compare various approaches in the literature approximating FFCs in two aspects: (1) angular dependent survival probability of neutrinos versus simple equipartition condition with a certain baryon mass density threshold, and (2) 4-species treat","authors_text":"Hiroki Nagakura, Ryuichiro Akaho, Shoichi Yamada","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-06-08T06:47:31Z","title":"Comparative Testing of Subgrid Models for Fast Neutrino Flavor Conversions in Core-collapse Supernova Simulations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.07017","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":"sha256:2309b0012e73bbe216efe9ee11164abf469cb4639be0e67290846968722442e0","target":"record","created_at":"2026-07-05T11:57:37Z","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":"badae9afba1c06f1389245d11ec8bae5792bebe6317224485255a067cb892a57","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-06-08T06:47:31Z","title_canon_sha256":"7515a1463cc350f86049298c461859f1384cea92e9cdc323a6b7142790575362"},"schema_version":"1.0","source":{"id":"2506.07017","kind":"arxiv","version":2}},"canonical_sha256":"be13e403b6c610ffd6c48cdb5f64a2bb274b0688d706209516c49bd5828ba6e0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"be13e403b6c610ffd6c48cdb5f64a2bb274b0688d706209516c49bd5828ba6e0","first_computed_at":"2026-07-05T11:57:37.300462Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:57:37.300462Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qpmX52fX+Oqj0stJeNDFmCsLfYVU6F3Cgz4JnL3uO/DaVeh2WN26hUeuKrLJnPff/ejBydvA4URFGZxddPH6DA==","signature_status":"signed_v1","signed_at":"2026-07-05T11:57:37.300976Z","signed_message":"canonical_sha256_bytes"},"source_id":"2506.07017","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2309b0012e73bbe216efe9ee11164abf469cb4639be0e67290846968722442e0","sha256:fc188df70381cdf7269731e1b101be43eb2f545118ebe9eb194872132eafcf25"],"state_sha256":"0b22263328591515f61cf4ad61b4c9dc48f61c9a8ac70e37b67aaa513206324e"}