{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2005:ECPHKYPCQKJTNQBGAHYYH6VSMB","short_pith_number":"pith:ECPHKYPC","canonical_record":{"source":{"id":"astro-ph/0501557","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2005-01-25T20:02:44Z","cross_cats_sorted":[],"title_canon_sha256":"523803b09dbb4ac2e44ca570126b21d45c1e2e5fcd87e7e2a1f0091d0ebdd084","abstract_canon_sha256":"28124a02f6531a23daf54fc7792965a0871cad98cfef84a7a94e591fb1a17118"},"schema_version":"1.0"},"canonical_sha256":"209e7561e2829336c02601f183fab2604e7bf250bbb08c3b79ede5676db26003","source":{"kind":"arxiv","id":"astro-ph/0501557","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0501557","created_at":"2026-07-04T16:50:42Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0501557v1","created_at":"2026-07-04T16:50:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0501557","created_at":"2026-07-04T16:50:42Z"},{"alias_kind":"pith_short_12","alias_value":"ECPHKYPCQKJT","created_at":"2026-07-04T16:50:42Z"},{"alias_kind":"pith_short_16","alias_value":"ECPHKYPCQKJTNQBG","created_at":"2026-07-04T16:50:42Z"},{"alias_kind":"pith_short_8","alias_value":"ECPHKYPC","created_at":"2026-07-04T16:50:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2005:ECPHKYPCQKJTNQBGAHYYH6VSMB","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0501557","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2005-01-25T20:02:44Z","cross_cats_sorted":[],"title_canon_sha256":"523803b09dbb4ac2e44ca570126b21d45c1e2e5fcd87e7e2a1f0091d0ebdd084","abstract_canon_sha256":"28124a02f6531a23daf54fc7792965a0871cad98cfef84a7a94e591fb1a17118"},"schema_version":"1.0"},"canonical_sha256":"209e7561e2829336c02601f183fab2604e7bf250bbb08c3b79ede5676db26003","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:50:42.251732Z","signature_b64":"TQtgV4KaGQhsoIfZgyzONLn4wEttiVdJ6oE89Z4xh5B27PJ1P8Rf+7M3Sq0nMk5WxOHX0fpymrEw9XQp7ctIBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"209e7561e2829336c02601f183fab2604e7bf250bbb08c3b79ede5676db26003","last_reissued_at":"2026-07-04T16:50:42.251367Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:50:42.251367Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0501557","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T16:50:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OQmHGrvSe9vSMX5PlioiROMOamWXqApSqV9VBTjwnjpjZO5+qKYsBXEdebIflSnm8k9Yb/h4M8Liii6ef/9DAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T03:34:47.120933Z"},"content_sha256":"9ad7d6fbf1089329c8fa414062f2f6094e8c804b28921f006ec24eea6072c1e6","schema_version":"1.0","event_id":"sha256:9ad7d6fbf1089329c8fa414062f2f6094e8c804b28921f006ec24eea6072c1e6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2005:ECPHKYPCQKJTNQBGAHYYH6VSMB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An Unsplit Godunov Method for Ideal MHD via Constrained Transport","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"James M. Stone, Thomas A. Gardiner","submitted_at":"2005-01-25T20:02:44Z","abstract_excerpt":"We describe a single step, second-order accurate Godunov scheme for ideal MHD based on combining the piecewise parabolic method (PPM) for performing spatial reconstruction, the corner transport upwind (CTU) method of Colella for multidimensional integration, and the constrained transport (CT) algorithm for preserving the divergence-free constraint on the magnetic field. We adopt the most compact form of CT, which requires the field be represented by area-averages at cell faces. We demonstrate that the fluxes of the area-averaged field used by CT can be made consistent with the fluxes of the vo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0501557","kind":"arxiv","version":1},"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/astro-ph/0501557/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":"2026-07-04T16:50:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UZoGxEcftxgwi0by9pOjIYIZoxoT28CcQTERGIiytJ03+QW8YzYXZd2O1yx9TLuj/IuzglmDsvyWHLn9rGFIBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T03:34:47.121814Z"},"content_sha256":"d370b4c358194e5afb22cf83cf9f603364c0976199622813bb4ad121d95afe41","schema_version":"1.0","event_id":"sha256:d370b4c358194e5afb22cf83cf9f603364c0976199622813bb4ad121d95afe41"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ECPHKYPCQKJTNQBGAHYYH6VSMB/bundle.json","state_url":"https://pith.science/pith/ECPHKYPCQKJTNQBGAHYYH6VSMB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ECPHKYPCQKJTNQBGAHYYH6VSMB/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":"2026-08-10T03:34:47Z","links":{"resolver":"https://pith.science/pith/ECPHKYPCQKJTNQBGAHYYH6VSMB","bundle":"https://pith.science/pith/ECPHKYPCQKJTNQBGAHYYH6VSMB/bundle.json","state":"https://pith.science/pith/ECPHKYPCQKJTNQBGAHYYH6VSMB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ECPHKYPCQKJTNQBGAHYYH6VSMB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2005:ECPHKYPCQKJTNQBGAHYYH6VSMB","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":"28124a02f6531a23daf54fc7792965a0871cad98cfef84a7a94e591fb1a17118","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2005-01-25T20:02:44Z","title_canon_sha256":"523803b09dbb4ac2e44ca570126b21d45c1e2e5fcd87e7e2a1f0091d0ebdd084"},"schema_version":"1.0","source":{"id":"astro-ph/0501557","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0501557","created_at":"2026-07-04T16:50:42Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0501557v1","created_at":"2026-07-04T16:50:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0501557","created_at":"2026-07-04T16:50:42Z"},{"alias_kind":"pith_short_12","alias_value":"ECPHKYPCQKJT","created_at":"2026-07-04T16:50:42Z"},{"alias_kind":"pith_short_16","alias_value":"ECPHKYPCQKJTNQBG","created_at":"2026-07-04T16:50:42Z"},{"alias_kind":"pith_short_8","alias_value":"ECPHKYPC","created_at":"2026-07-04T16:50:42Z"}],"graph_snapshots":[{"event_id":"sha256:d370b4c358194e5afb22cf83cf9f603364c0976199622813bb4ad121d95afe41","target":"graph","created_at":"2026-07-04T16:50:42Z","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/astro-ph/0501557/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We describe a single step, second-order accurate Godunov scheme for ideal MHD based on combining the piecewise parabolic method (PPM) for performing spatial reconstruction, the corner transport upwind (CTU) method of Colella for multidimensional integration, and the constrained transport (CT) algorithm for preserving the divergence-free constraint on the magnetic field. We adopt the most compact form of CT, which requires the field be represented by area-averages at cell faces. We demonstrate that the fluxes of the area-averaged field used by CT can be made consistent with the fluxes of the vo","authors_text":"James M. Stone, Thomas A. Gardiner","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2005-01-25T20:02:44Z","title":"An Unsplit Godunov Method for Ideal MHD via Constrained Transport"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0501557","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":"sha256:9ad7d6fbf1089329c8fa414062f2f6094e8c804b28921f006ec24eea6072c1e6","target":"record","created_at":"2026-07-04T16:50:42Z","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":"28124a02f6531a23daf54fc7792965a0871cad98cfef84a7a94e591fb1a17118","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2005-01-25T20:02:44Z","title_canon_sha256":"523803b09dbb4ac2e44ca570126b21d45c1e2e5fcd87e7e2a1f0091d0ebdd084"},"schema_version":"1.0","source":{"id":"astro-ph/0501557","kind":"arxiv","version":1}},"canonical_sha256":"209e7561e2829336c02601f183fab2604e7bf250bbb08c3b79ede5676db26003","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"209e7561e2829336c02601f183fab2604e7bf250bbb08c3b79ede5676db26003","first_computed_at":"2026-07-04T16:50:42.251367Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:50:42.251367Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TQtgV4KaGQhsoIfZgyzONLn4wEttiVdJ6oE89Z4xh5B27PJ1P8Rf+7M3Sq0nMk5WxOHX0fpymrEw9XQp7ctIBA==","signature_status":"signed_v1","signed_at":"2026-07-04T16:50:42.251732Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0501557","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9ad7d6fbf1089329c8fa414062f2f6094e8c804b28921f006ec24eea6072c1e6","sha256:d370b4c358194e5afb22cf83cf9f603364c0976199622813bb4ad121d95afe41"],"state_sha256":"d76e230a36658549d3095e1376821c35116af028b38cb150f17f03f3d35a783a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QkWxKiuacKo59dSrM93n8GAIUXv8jxxHe16j/ydbdKW1T5hU+TqInOiGOpCCpU0Kz3YplEWheD29xUkLRkcrDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-10T03:34:47.127195Z","bundle_sha256":"20d28212845a09cb7b34d86d2848ff616499ecfe72485907a0151d8ba9755225"}}