{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:BEWXAE7YB4WUQDME6S4ARZZ3QH","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":"6cd80a7fdbc95f790a1872ff9c6e5312dcb4b47ee2e0e35e55610d43801c9897","cross_cats_sorted":["astro-ph.IM","gr-qc"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-02-05T14:41:39Z","title_canon_sha256":"5f9962db97353dfeeb91e54863fa27e28d730eba3ecdb6a6e9d524baae87950b"},"schema_version":"1.0","source":{"id":"2502.03223","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2502.03223","created_at":"2026-07-05T10:10:01Z"},{"alias_kind":"arxiv_version","alias_value":"2502.03223v1","created_at":"2026-07-05T10:10:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2502.03223","created_at":"2026-07-05T10:10:01Z"},{"alias_kind":"pith_short_12","alias_value":"BEWXAE7YB4WU","created_at":"2026-07-05T10:10:01Z"},{"alias_kind":"pith_short_16","alias_value":"BEWXAE7YB4WUQDME","created_at":"2026-07-05T10:10:01Z"},{"alias_kind":"pith_short_8","alias_value":"BEWXAE7Y","created_at":"2026-07-05T10:10:01Z"}],"graph_snapshots":[{"event_id":"sha256:6d14c61ee6a60ac898fbbcfbd65b578e83991a19012417b5510d33f7fa1b8bc8","target":"graph","created_at":"2026-07-05T10:10:01Z","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/2502.03223/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present \\texttt{SACRA-2D}, a new MPI and OpenMP parallelized, fully relativistic hydrodynamics (GRHD) code in dynamical spacetime under axial symmetry with the cartoon method using the finite-volume shock-capturing schemes for hydrodynamics. Specifically, we implemented the state-of-the-art HLLC Riemann solver and found better accuracy than the standard Total Variation Diminishing Lax-Friedrich Riemann solver. The spacetime evolves under the Baumgarte-Shapiro-Shibata-Nakamura formalism with Z4c constraint propagation. We demonstrate the accuracy of the code with some benchmark tests and exc","authors_text":"Alan Tsz-Lok Lam, Masaru Shibata","cross_cats":["astro-ph.IM","gr-qc"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-02-05T14:41:39Z","title":"SACRA-2D: New axisymmetric general relativistic hydrodynamics code with fixed mesh refinement"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2502.03223","kind":"arxiv","version":1},"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":"sha256:1fcdaddf717f09718c1b239c3f7b8087c301849a0cbffcc849c5df145feffa7f","target":"record","created_at":"2026-07-05T10:10:01Z","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":"6cd80a7fdbc95f790a1872ff9c6e5312dcb4b47ee2e0e35e55610d43801c9897","cross_cats_sorted":["astro-ph.IM","gr-qc"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-02-05T14:41:39Z","title_canon_sha256":"5f9962db97353dfeeb91e54863fa27e28d730eba3ecdb6a6e9d524baae87950b"},"schema_version":"1.0","source":{"id":"2502.03223","kind":"arxiv","version":1}},"canonical_sha256":"092d7013f80f2d480d84f4b808e73b81fa50cf712aba1472ce2a502015f79ab3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"092d7013f80f2d480d84f4b808e73b81fa50cf712aba1472ce2a502015f79ab3","first_computed_at":"2026-07-05T10:10:01.666370Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:10:01.666370Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5XpzndI/gG4L8yMTpXNdpnppYeC15O2citZx4HUXz2ZFrfNI431QA7l1CgCDbFEzheWBudUHmmBFzz+6RTFxBg==","signature_status":"signed_v1","signed_at":"2026-07-05T10:10:01.666849Z","signed_message":"canonical_sha256_bytes"},"source_id":"2502.03223","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1fcdaddf717f09718c1b239c3f7b8087c301849a0cbffcc849c5df145feffa7f","sha256:6d14c61ee6a60ac898fbbcfbd65b578e83991a19012417b5510d33f7fa1b8bc8"],"state_sha256":"467b3c45ed4b388c261caf82c672a3d19d4742ec237b3ace2d9a55fd20ec7e93"}