{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:24EQLXXG44DUQK5EFKJX7LCPSY","short_pith_number":"pith:24EQLXXG","canonical_record":{"source":{"id":"1309.5437","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2013-09-21T05:12:52Z","cross_cats_sorted":["astro-ph.CO","astro-ph.GA","astro-ph.HE","astro-ph.SR"],"title_canon_sha256":"0a9e27892612cd8314c3f444f16d74e0d32033f87819cca382a3b15824cbcf06","abstract_canon_sha256":"eb5df84a582bd1054892813b8c60b6ed8f52c65f6241b2f4d934589bf648b8fa"},"schema_version":"1.0"},"canonical_sha256":"d70905dee6e707482ba42a937fac4f961e9cf9f66e4b561e33e62958851909cc","source":{"kind":"arxiv","id":"1309.5437","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.5437","created_at":"2026-05-18T01:47:34Z"},{"alias_kind":"arxiv_version","alias_value":"1309.5437v1","created_at":"2026-05-18T01:47:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.5437","created_at":"2026-05-18T01:47:34Z"},{"alias_kind":"pith_short_12","alias_value":"24EQLXXG44DU","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_16","alias_value":"24EQLXXG44DUQK5E","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_8","alias_value":"24EQLXXG","created_at":"2026-05-18T12:27:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:24EQLXXG44DUQK5EFKJX7LCPSY","target":"record","payload":{"canonical_record":{"source":{"id":"1309.5437","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2013-09-21T05:12:52Z","cross_cats_sorted":["astro-ph.CO","astro-ph.GA","astro-ph.HE","astro-ph.SR"],"title_canon_sha256":"0a9e27892612cd8314c3f444f16d74e0d32033f87819cca382a3b15824cbcf06","abstract_canon_sha256":"eb5df84a582bd1054892813b8c60b6ed8f52c65f6241b2f4d934589bf648b8fa"},"schema_version":"1.0"},"canonical_sha256":"d70905dee6e707482ba42a937fac4f961e9cf9f66e4b561e33e62958851909cc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:47:34.742139Z","signature_b64":"fJuMDkdrIEldZ9xwni4m4j7yCgd2wuFiHL5QjZdBd3arvsl+VIJzt2Y4kejv3EVP4f8AjolnJuoPEkZWNTuZCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d70905dee6e707482ba42a937fac4f961e9cf9f66e4b561e33e62958851909cc","last_reissued_at":"2026-05-18T01:47:34.741717Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:47:34.741717Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1309.5437","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":"2026-05-18T01:47:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9EW6fI70imiZ0u3LqvQ7LP62t0UJ+W5c0JbvecNkvPWMQYkygLa87ATFpuO4Xrz+z0taptfEeVNh09PWcyUfCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T00:32:48.750897Z"},"content_sha256":"17571069dfdf093187de79a6c53f7f03dfc2cec2c404a955bb770e7cdaa4bc4b","schema_version":"1.0","event_id":"sha256:17571069dfdf093187de79a6c53f7f03dfc2cec2c404a955bb770e7cdaa4bc4b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:24EQLXXG44DUQK5EFKJX7LCPSY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A switch to reduce resistivity in smoothed particle magnetohydrodynamics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","astro-ph.GA","astro-ph.HE","astro-ph.SR"],"primary_cat":"astro-ph.IM","authors_text":"Daniel J. Price, Terrence S. Tricco","submitted_at":"2013-09-21T05:12:52Z","abstract_excerpt":"Artificial resistivity is included in Smoothed Particle Magnetohydrodynamics simulations to capture shocks and discontinuities in the magnetic field. Here we present a new method for adapting the strength of the applied resistivity so that shocks are captured but the dissipation of the magnetic field away from shocks is minimised. Our scheme utilises the gradient of the magnetic field as a shock indicator, setting {\\alpha}_B = h|gradB|/|B|, such that resistivity is switched on only where strong discontinuities are present. The advantage to this approach is that the resistivity parameter does n"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.5437","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":"2026-05-18T01:47:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bNGKpOLQ893aZOTX0ckxN1JVzH17uZYSQGP6xhPoqnhr34gWykBIDp5X1QY0XXQlhlnmiWmOtHguW+EqBtZKCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T00:32:48.751237Z"},"content_sha256":"783df4e81ee8f1e62fc697f90a9a641bdd801d95007cf2a10497e6eb9c07b94d","schema_version":"1.0","event_id":"sha256:783df4e81ee8f1e62fc697f90a9a641bdd801d95007cf2a10497e6eb9c07b94d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/24EQLXXG44DUQK5EFKJX7LCPSY/bundle.json","state_url":"https://pith.science/pith/24EQLXXG44DUQK5EFKJX7LCPSY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/24EQLXXG44DUQK5EFKJX7LCPSY/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":"2026-06-03T00:32:48Z","links":{"resolver":"https://pith.science/pith/24EQLXXG44DUQK5EFKJX7LCPSY","bundle":"https://pith.science/pith/24EQLXXG44DUQK5EFKJX7LCPSY/bundle.json","state":"https://pith.science/pith/24EQLXXG44DUQK5EFKJX7LCPSY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/24EQLXXG44DUQK5EFKJX7LCPSY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:24EQLXXG44DUQK5EFKJX7LCPSY","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":"eb5df84a582bd1054892813b8c60b6ed8f52c65f6241b2f4d934589bf648b8fa","cross_cats_sorted":["astro-ph.CO","astro-ph.GA","astro-ph.HE","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2013-09-21T05:12:52Z","title_canon_sha256":"0a9e27892612cd8314c3f444f16d74e0d32033f87819cca382a3b15824cbcf06"},"schema_version":"1.0","source":{"id":"1309.5437","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.5437","created_at":"2026-05-18T01:47:34Z"},{"alias_kind":"arxiv_version","alias_value":"1309.5437v1","created_at":"2026-05-18T01:47:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.5437","created_at":"2026-05-18T01:47:34Z"},{"alias_kind":"pith_short_12","alias_value":"24EQLXXG44DU","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_16","alias_value":"24EQLXXG44DUQK5E","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_8","alias_value":"24EQLXXG","created_at":"2026-05-18T12:27:30Z"}],"graph_snapshots":[{"event_id":"sha256:783df4e81ee8f1e62fc697f90a9a641bdd801d95007cf2a10497e6eb9c07b94d","target":"graph","created_at":"2026-05-18T01:47:34Z","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":"Artificial resistivity is included in Smoothed Particle Magnetohydrodynamics simulations to capture shocks and discontinuities in the magnetic field. Here we present a new method for adapting the strength of the applied resistivity so that shocks are captured but the dissipation of the magnetic field away from shocks is minimised. Our scheme utilises the gradient of the magnetic field as a shock indicator, setting {\\alpha}_B = h|gradB|/|B|, such that resistivity is switched on only where strong discontinuities are present. The advantage to this approach is that the resistivity parameter does n","authors_text":"Daniel J. Price, Terrence S. Tricco","cross_cats":["astro-ph.CO","astro-ph.GA","astro-ph.HE","astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2013-09-21T05:12:52Z","title":"A switch to reduce resistivity in smoothed particle magnetohydrodynamics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.5437","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":"sha256:17571069dfdf093187de79a6c53f7f03dfc2cec2c404a955bb770e7cdaa4bc4b","target":"record","created_at":"2026-05-18T01:47:34Z","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":"eb5df84a582bd1054892813b8c60b6ed8f52c65f6241b2f4d934589bf648b8fa","cross_cats_sorted":["astro-ph.CO","astro-ph.GA","astro-ph.HE","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2013-09-21T05:12:52Z","title_canon_sha256":"0a9e27892612cd8314c3f444f16d74e0d32033f87819cca382a3b15824cbcf06"},"schema_version":"1.0","source":{"id":"1309.5437","kind":"arxiv","version":1}},"canonical_sha256":"d70905dee6e707482ba42a937fac4f961e9cf9f66e4b561e33e62958851909cc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d70905dee6e707482ba42a937fac4f961e9cf9f66e4b561e33e62958851909cc","first_computed_at":"2026-05-18T01:47:34.741717Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:47:34.741717Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fJuMDkdrIEldZ9xwni4m4j7yCgd2wuFiHL5QjZdBd3arvsl+VIJzt2Y4kejv3EVP4f8AjolnJuoPEkZWNTuZCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:47:34.742139Z","signed_message":"canonical_sha256_bytes"},"source_id":"1309.5437","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:17571069dfdf093187de79a6c53f7f03dfc2cec2c404a955bb770e7cdaa4bc4b","sha256:783df4e81ee8f1e62fc697f90a9a641bdd801d95007cf2a10497e6eb9c07b94d"],"state_sha256":"f6ead07324390a33bff4699a5c66785f348311851881afcdebaa41c48b3dad05"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"t5QaybcAM42+6fDwbc1IkiN4WjMYX69ENlYRbdFM7/QaHg+a38QXswMzfzp1Vv0U6KIfpsrNgjuVfdXRgMF6CQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T00:32:48.753153Z","bundle_sha256":"8988f0d49f308d245ea2a779789ca56a80ec23f04ba35a12c6d7f607d428b7bf"}}