{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:2BOHI7UEXUDKNR2ORLAVOV3TUS","short_pith_number":"pith:2BOHI7UE","canonical_record":{"source":{"id":"2409.10384","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-09-16T15:20:43Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"5cfb7249caa9181848126565c75cbb8758aee4e75d9848a07ca2eead3a8c5092","abstract_canon_sha256":"b157e924b8685ed36da6e8c5c98bf0d2cce9dabb2327002fa42fe4400b408d8b"},"schema_version":"1.0"},"canonical_sha256":"d05c747e84bd06a6c74e8ac1575773a4a8124a9b76bc49622c660877ecb5124c","source":{"kind":"arxiv","id":"2409.10384","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2409.10384","created_at":"2026-07-05T10:00:41Z"},{"alias_kind":"arxiv_version","alias_value":"2409.10384v3","created_at":"2026-07-05T10:00:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2409.10384","created_at":"2026-07-05T10:00:41Z"},{"alias_kind":"pith_short_12","alias_value":"2BOHI7UEXUDK","created_at":"2026-07-05T10:00:41Z"},{"alias_kind":"pith_short_16","alias_value":"2BOHI7UEXUDKNR2O","created_at":"2026-07-05T10:00:41Z"},{"alias_kind":"pith_short_8","alias_value":"2BOHI7UE","created_at":"2026-07-05T10:00:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:2BOHI7UEXUDKNR2ORLAVOV3TUS","target":"record","payload":{"canonical_record":{"source":{"id":"2409.10384","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-09-16T15:20:43Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"5cfb7249caa9181848126565c75cbb8758aee4e75d9848a07ca2eead3a8c5092","abstract_canon_sha256":"b157e924b8685ed36da6e8c5c98bf0d2cce9dabb2327002fa42fe4400b408d8b"},"schema_version":"1.0"},"canonical_sha256":"d05c747e84bd06a6c74e8ac1575773a4a8124a9b76bc49622c660877ecb5124c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:00:41.273743Z","signature_b64":"Me2qU5Ee1EwvSvTKqX23ZVdRtWsWk0XVG6pPYpg8lE+CtmuiI5r2++foAgNXqkOKRw9L4AUcdZtVB14IAbHwBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d05c747e84bd06a6c74e8ac1575773a4a8124a9b76bc49622c660877ecb5124c","last_reissued_at":"2026-07-05T10:00:41.273360Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:00:41.273360Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2409.10384","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T10:00:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Avd9yLiqHEO/4ZPNM4J188OTKaWxOtoVOcP4Gac0hV71TRm+htAruPzBvXveaqqH0toID6bIZ9WfZNZIvwj+AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T05:52:41.813037Z"},"content_sha256":"8c45d7975f9bb4b603dad86867a328cc24fc53cffc5ae0297546fcdf2162cff5","schema_version":"1.0","event_id":"sha256:8c45d7975f9bb4b603dad86867a328cc24fc53cffc5ae0297546fcdf2162cff5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:2BOHI7UEXUDKNR2ORLAVOV3TUS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Performance-Portable Binary Neutron Star Mergers with AthenaK","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"astro-ph.HE","authors_text":"Boris Daszuta, David Radice, Hengrui Zhu, Jacob Fields, James M. Stone, Sebastiano Bernuzzi, William Cook","submitted_at":"2024-09-16T15:20:43Z","abstract_excerpt":"We introduce an extension to the AthenaK code for general-relativistic magnetohydrodynamics (GRMHD) in dynamical spacetimes using a 3+1 conservative Eulerian formulation. Like the fixed-spacetime GRMHD solver, we use standard finite-volume methods to evolve the fluid and a constrained transport scheme to preserve the divergence-free constraint for the magnetic field. We also utilize a first-order flux correction (FOFC) scheme to reduce the need for an artificial atmosphere and optionally enforce a maximum principle to improve robustness. We demonstrate the accuracy of AthenaK using a set of st"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2409.10384","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2409.10384/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T10:00:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kLk7Y3xRM8/RBp77dCKewRW1yYUa8+KEF4apoUQfL6XTCDXBw4CheUG0HHn93R/aJUT+YCpy1kxQLrKUWxbVBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T05:52:41.813971Z"},"content_sha256":"6e6b147a011adf71b394ac78f3d5bd32a057de52e8c035c546ee227acebd3569","schema_version":"1.0","event_id":"sha256:6e6b147a011adf71b394ac78f3d5bd32a057de52e8c035c546ee227acebd3569"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2BOHI7UEXUDKNR2ORLAVOV3TUS/bundle.json","state_url":"https://pith.science/pith/2BOHI7UEXUDKNR2ORLAVOV3TUS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2BOHI7UEXUDKNR2ORLAVOV3TUS/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":"2026-08-13T05:52:41Z","links":{"resolver":"https://pith.science/pith/2BOHI7UEXUDKNR2ORLAVOV3TUS","bundle":"https://pith.science/pith/2BOHI7UEXUDKNR2ORLAVOV3TUS/bundle.json","state":"https://pith.science/pith/2BOHI7UEXUDKNR2ORLAVOV3TUS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2BOHI7UEXUDKNR2ORLAVOV3TUS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:2BOHI7UEXUDKNR2ORLAVOV3TUS","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":"b157e924b8685ed36da6e8c5c98bf0d2cce9dabb2327002fa42fe4400b408d8b","cross_cats_sorted":["gr-qc"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-09-16T15:20:43Z","title_canon_sha256":"5cfb7249caa9181848126565c75cbb8758aee4e75d9848a07ca2eead3a8c5092"},"schema_version":"1.0","source":{"id":"2409.10384","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2409.10384","created_at":"2026-07-05T10:00:41Z"},{"alias_kind":"arxiv_version","alias_value":"2409.10384v3","created_at":"2026-07-05T10:00:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2409.10384","created_at":"2026-07-05T10:00:41Z"},{"alias_kind":"pith_short_12","alias_value":"2BOHI7UEXUDK","created_at":"2026-07-05T10:00:41Z"},{"alias_kind":"pith_short_16","alias_value":"2BOHI7UEXUDKNR2O","created_at":"2026-07-05T10:00:41Z"},{"alias_kind":"pith_short_8","alias_value":"2BOHI7UE","created_at":"2026-07-05T10:00:41Z"}],"graph_snapshots":[{"event_id":"sha256:6e6b147a011adf71b394ac78f3d5bd32a057de52e8c035c546ee227acebd3569","target":"graph","created_at":"2026-07-05T10:00:41Z","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/2409.10384/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We introduce an extension to the AthenaK code for general-relativistic magnetohydrodynamics (GRMHD) in dynamical spacetimes using a 3+1 conservative Eulerian formulation. Like the fixed-spacetime GRMHD solver, we use standard finite-volume methods to evolve the fluid and a constrained transport scheme to preserve the divergence-free constraint for the magnetic field. We also utilize a first-order flux correction (FOFC) scheme to reduce the need for an artificial atmosphere and optionally enforce a maximum principle to improve robustness. We demonstrate the accuracy of AthenaK using a set of st","authors_text":"Boris Daszuta, David Radice, Hengrui Zhu, Jacob Fields, James M. Stone, Sebastiano Bernuzzi, William Cook","cross_cats":["gr-qc"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-09-16T15:20:43Z","title":"Performance-Portable Binary Neutron Star Mergers with AthenaK"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2409.10384","kind":"arxiv","version":3},"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":"sha256:8c45d7975f9bb4b603dad86867a328cc24fc53cffc5ae0297546fcdf2162cff5","target":"record","created_at":"2026-07-05T10:00:41Z","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":"b157e924b8685ed36da6e8c5c98bf0d2cce9dabb2327002fa42fe4400b408d8b","cross_cats_sorted":["gr-qc"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-09-16T15:20:43Z","title_canon_sha256":"5cfb7249caa9181848126565c75cbb8758aee4e75d9848a07ca2eead3a8c5092"},"schema_version":"1.0","source":{"id":"2409.10384","kind":"arxiv","version":3}},"canonical_sha256":"d05c747e84bd06a6c74e8ac1575773a4a8124a9b76bc49622c660877ecb5124c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d05c747e84bd06a6c74e8ac1575773a4a8124a9b76bc49622c660877ecb5124c","first_computed_at":"2026-07-05T10:00:41.273360Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:00:41.273360Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Me2qU5Ee1EwvSvTKqX23ZVdRtWsWk0XVG6pPYpg8lE+CtmuiI5r2++foAgNXqkOKRw9L4AUcdZtVB14IAbHwBw==","signature_status":"signed_v1","signed_at":"2026-07-05T10:00:41.273743Z","signed_message":"canonical_sha256_bytes"},"source_id":"2409.10384","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8c45d7975f9bb4b603dad86867a328cc24fc53cffc5ae0297546fcdf2162cff5","sha256:6e6b147a011adf71b394ac78f3d5bd32a057de52e8c035c546ee227acebd3569"],"state_sha256":"f23f00f4e1e0b226d788ac39b3cc83d91dc8e0e9bf95e3db336157aeb5a77257"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VZSVXrMno14IhHB2v0RUeCwYwKFPbllWWi4vfOFHn35n+W5/8eoYl+NmTzDWuDX92wuCquk5CFo5YrbIpyjqCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-13T05:52:41.896222Z","bundle_sha256":"146bd9dda55aa3704279677d85de6bc8bf3aedacc6154b662f8909281005c3e3"}}