{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:IXCSBICHHRS7UCWU5SGCXPWTML","short_pith_number":"pith:IXCSBICH","canonical_record":{"source":{"id":"1508.00003","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-07-31T20:00:12Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"00ff6889a5e6ec2203ea02776d50e98005ed038ec92ba0719b5fe6bc77c5c6d3","abstract_canon_sha256":"96171ec2697e5516899fbb78addaf4c74cde7dd1bec9cee25ce21ef3853b4b3c"},"schema_version":"1.0"},"canonical_sha256":"45c520a0473c65fa0ad4ec8c2bbed362d527a543aa96ee91bb5c5dd8a7f33302","source":{"kind":"arxiv","id":"1508.00003","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.00003","created_at":"2026-05-18T01:24:18Z"},{"alias_kind":"arxiv_version","alias_value":"1508.00003v1","created_at":"2026-05-18T01:24:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.00003","created_at":"2026-05-18T01:24:18Z"},{"alias_kind":"pith_short_12","alias_value":"IXCSBICHHRS7","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_16","alias_value":"IXCSBICHHRS7UCWU","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_8","alias_value":"IXCSBICH","created_at":"2026-05-18T12:29:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:IXCSBICHHRS7UCWU5SGCXPWTML","target":"record","payload":{"canonical_record":{"source":{"id":"1508.00003","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-07-31T20:00:12Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"00ff6889a5e6ec2203ea02776d50e98005ed038ec92ba0719b5fe6bc77c5c6d3","abstract_canon_sha256":"96171ec2697e5516899fbb78addaf4c74cde7dd1bec9cee25ce21ef3853b4b3c"},"schema_version":"1.0"},"canonical_sha256":"45c520a0473c65fa0ad4ec8c2bbed362d527a543aa96ee91bb5c5dd8a7f33302","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:24:18.620445Z","signature_b64":"i4HAZym+IbfDUcblpLSQKnOnQ1o5PkgCXe7Gw4dZ+R3yAvdd/rJ059llgWFCS0pzOjK0ArFaIgPz45P63P8yCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"45c520a0473c65fa0ad4ec8c2bbed362d527a543aa96ee91bb5c5dd8a7f33302","last_reissued_at":"2026-05-18T01:24:18.620032Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:24:18.620032Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1508.00003","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":"2026-05-18T01:24:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tGm1k/DOE3y/OySAevqGRrRr5Bm+adLFe7YM45JoEx1JPdmV+WuQt7Fuk3Kh2OHIEfwPk8upovelGYObnRQXBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T03:33:09.086547Z"},"content_sha256":"4ccb1d8613c357e2d7427aec3174417bc3cfb2d24a6f3ecbca61ffefff5a2ed5","schema_version":"1.0","event_id":"sha256:4ccb1d8613c357e2d7427aec3174417bc3cfb2d24a6f3ecbca61ffefff5a2ed5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:IXCSBICHHRS7UCWU5SGCXPWTML","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Numerical MHD Codes for Modeling Astrophysical Flows","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.GA","authors_text":"A.V. Koldoba, G.V. Ustyugova, M.L. Comins, M.M. Romanova, P.S. Lii, R.V.E. Lovelace, S. Dyda","submitted_at":"2015-07-31T20:00:12Z","abstract_excerpt":"We describe a Godunov-type magnetohydrodynamic (MHD) code based on the Miyoshi and Kusano (2005) solver which can be used to solve various astrophysical hydrodynamic and MHD problems. The energy equation is in the form of entropy conservation. The code has been implemented on several different coordinate systems: 2.5D axisymmetric cylindrical coordinates, 2D Cartesian coordinates, 2D plane polar coordinates, and fully 3D cylindrical coordinates. Viscosity and diffusivity are implemented in the code to control the accretion rate in the disk and the rate of penetration of the disk matter through"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.00003","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":""},"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":"2026-05-18T01:24:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fDYLFNIV8NMi3NMH72kR7AWK78Yyaf/HTSfovMesfZDjzOGGcCWqAglKEje11CqbOc38GUwdOlVrcDkbqbOKBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T03:33:09.087212Z"},"content_sha256":"a359c65c09c395c529722d85ab119cf91eec02c93b5c88db78c2a030a07236f4","schema_version":"1.0","event_id":"sha256:a359c65c09c395c529722d85ab119cf91eec02c93b5c88db78c2a030a07236f4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IXCSBICHHRS7UCWU5SGCXPWTML/bundle.json","state_url":"https://pith.science/pith/IXCSBICHHRS7UCWU5SGCXPWTML/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IXCSBICHHRS7UCWU5SGCXPWTML/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":"2026-05-26T03:33:09Z","links":{"resolver":"https://pith.science/pith/IXCSBICHHRS7UCWU5SGCXPWTML","bundle":"https://pith.science/pith/IXCSBICHHRS7UCWU5SGCXPWTML/bundle.json","state":"https://pith.science/pith/IXCSBICHHRS7UCWU5SGCXPWTML/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IXCSBICHHRS7UCWU5SGCXPWTML/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:IXCSBICHHRS7UCWU5SGCXPWTML","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":"96171ec2697e5516899fbb78addaf4c74cde7dd1bec9cee25ce21ef3853b4b3c","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-07-31T20:00:12Z","title_canon_sha256":"00ff6889a5e6ec2203ea02776d50e98005ed038ec92ba0719b5fe6bc77c5c6d3"},"schema_version":"1.0","source":{"id":"1508.00003","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.00003","created_at":"2026-05-18T01:24:18Z"},{"alias_kind":"arxiv_version","alias_value":"1508.00003v1","created_at":"2026-05-18T01:24:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.00003","created_at":"2026-05-18T01:24:18Z"},{"alias_kind":"pith_short_12","alias_value":"IXCSBICHHRS7","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_16","alias_value":"IXCSBICHHRS7UCWU","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_8","alias_value":"IXCSBICH","created_at":"2026-05-18T12:29:27Z"}],"graph_snapshots":[{"event_id":"sha256:a359c65c09c395c529722d85ab119cf91eec02c93b5c88db78c2a030a07236f4","target":"graph","created_at":"2026-05-18T01:24:18Z","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 describe a Godunov-type magnetohydrodynamic (MHD) code based on the Miyoshi and Kusano (2005) solver which can be used to solve various astrophysical hydrodynamic and MHD problems. The energy equation is in the form of entropy conservation. The code has been implemented on several different coordinate systems: 2.5D axisymmetric cylindrical coordinates, 2D Cartesian coordinates, 2D plane polar coordinates, and fully 3D cylindrical coordinates. Viscosity and diffusivity are implemented in the code to control the accretion rate in the disk and the rate of penetration of the disk matter through","authors_text":"A.V. Koldoba, G.V. Ustyugova, M.L. Comins, M.M. Romanova, P.S. Lii, R.V.E. Lovelace, S. Dyda","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-07-31T20:00:12Z","title":"Numerical MHD Codes for Modeling Astrophysical Flows"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.00003","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":"sha256:4ccb1d8613c357e2d7427aec3174417bc3cfb2d24a6f3ecbca61ffefff5a2ed5","target":"record","created_at":"2026-05-18T01:24:18Z","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":"96171ec2697e5516899fbb78addaf4c74cde7dd1bec9cee25ce21ef3853b4b3c","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-07-31T20:00:12Z","title_canon_sha256":"00ff6889a5e6ec2203ea02776d50e98005ed038ec92ba0719b5fe6bc77c5c6d3"},"schema_version":"1.0","source":{"id":"1508.00003","kind":"arxiv","version":1}},"canonical_sha256":"45c520a0473c65fa0ad4ec8c2bbed362d527a543aa96ee91bb5c5dd8a7f33302","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"45c520a0473c65fa0ad4ec8c2bbed362d527a543aa96ee91bb5c5dd8a7f33302","first_computed_at":"2026-05-18T01:24:18.620032Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:24:18.620032Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"i4HAZym+IbfDUcblpLSQKnOnQ1o5PkgCXe7Gw4dZ+R3yAvdd/rJ059llgWFCS0pzOjK0ArFaIgPz45P63P8yCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:24:18.620445Z","signed_message":"canonical_sha256_bytes"},"source_id":"1508.00003","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4ccb1d8613c357e2d7427aec3174417bc3cfb2d24a6f3ecbca61ffefff5a2ed5","sha256:a359c65c09c395c529722d85ab119cf91eec02c93b5c88db78c2a030a07236f4"],"state_sha256":"dc69f225bc5cd3f8dbbc9c7c095092046d5f744769a40491789d978b06459c05"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/Gph2GczyZkJ9SbQApqRt97CXqEFqKW9q38OzIrqywwSng1x7oVmKiUY8AXE0U/9yCbrKbDvIY66IHeQFYoZCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T03:33:09.091057Z","bundle_sha256":"19f0fad8f00df8d006fbaafca726a433704afe5d162f53aceb3341d2724cfd87"}}