{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:ULM2AM2I2MV3CG7RX2JVFGOKYC","short_pith_number":"pith:ULM2AM2I","canonical_record":{"source":{"id":"1908.03089","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-08-08T14:17:30Z","cross_cats_sorted":[],"title_canon_sha256":"c627234281a3849a36819723219c35337463b51a8223fa6168571f0e281eaa34","abstract_canon_sha256":"ae80482c6a15c6ae32b18583375fd38042d2a9c7a139c4bc2a0a0d869913e653"},"schema_version":"1.0"},"canonical_sha256":"a2d9a03348d32bb11bf1be935299cac09c8881546fdecba0786f2ed7fd60d4f0","source":{"kind":"arxiv","id":"1908.03089","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.03089","created_at":"2026-07-05T00:03:51Z"},{"alias_kind":"arxiv_version","alias_value":"1908.03089v1","created_at":"2026-07-05T00:03:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.03089","created_at":"2026-07-05T00:03:51Z"},{"alias_kind":"pith_short_12","alias_value":"ULM2AM2I2MV3","created_at":"2026-07-05T00:03:51Z"},{"alias_kind":"pith_short_16","alias_value":"ULM2AM2I2MV3CG7R","created_at":"2026-07-05T00:03:51Z"},{"alias_kind":"pith_short_8","alias_value":"ULM2AM2I","created_at":"2026-07-05T00:03:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:ULM2AM2I2MV3CG7RX2JVFGOKYC","target":"record","payload":{"canonical_record":{"source":{"id":"1908.03089","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-08-08T14:17:30Z","cross_cats_sorted":[],"title_canon_sha256":"c627234281a3849a36819723219c35337463b51a8223fa6168571f0e281eaa34","abstract_canon_sha256":"ae80482c6a15c6ae32b18583375fd38042d2a9c7a139c4bc2a0a0d869913e653"},"schema_version":"1.0"},"canonical_sha256":"a2d9a03348d32bb11bf1be935299cac09c8881546fdecba0786f2ed7fd60d4f0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:03:51.492414Z","signature_b64":"Ln27ZkbhBnLIpYtd5bjf0xcpLp3+VYc8ks+fN0ict6YJeth6x13NA5SQF3ovOFGywmhFby7pg96FJRr/boOzCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a2d9a03348d32bb11bf1be935299cac09c8881546fdecba0786f2ed7fd60d4f0","last_reissued_at":"2026-07-05T00:03:51.491792Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:03:51.491792Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1908.03089","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":"2026-07-05T00:03:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dHIIr3pEW5Gg5bm93IaRRucvizs5kYqTr2fvBaiToDaoNH/FIJjb5nYs1JC8GG+eEw+S9Z3XfYzR5kjNIpvDDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T06:16:20.269486Z"},"content_sha256":"437f7ef523f5027a7b020a4827e3f1813fd4ab7a9e98ec2e78a5bf3ad2e0333f","schema_version":"1.0","event_id":"sha256:437f7ef523f5027a7b020a4827e3f1813fd4ab7a9e98ec2e78a5bf3ad2e0333f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:ULM2AM2I2MV3CG7RX2JVFGOKYC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Magnetohydrodynamic waves in braided magnetic fields","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Alan Hood, Ineke De Moortel, Jack Reid, Thomas Howson","submitted_at":"2019-08-08T14:17:30Z","abstract_excerpt":"We consider a series of MHD simulations in which a small amplitude, transverse velocity perturbation is introduced into a complex magnetic field. We analysed the deformation of the wave fronts as the perturbation propagates through the braided magnetic structures and explore the nature of Alfv\\'enic wave phase mixing in this regime. Spatial gradients in the local Alfv\\'en speed and variations in the length of magnetic field lines ensure that small scales form throughout the propagating wave front due to phase mixing. Additionally, the presence of complex, intricate current sheets associated wi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.03089","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/1908.03089/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":"2026-07-05T00:03:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rfuUQnP7mtGKVzGvxNJJR/LkRhX0ZSEva+wCUzAe3sLr+ojHfbM9vQK69prAzboJ7vYmxSW4kAkCN843R+3QAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T06:16:20.270177Z"},"content_sha256":"e4d23d9de62465c33d14028af624cf655ec12010fb39a555547e24da0e98564d","schema_version":"1.0","event_id":"sha256:e4d23d9de62465c33d14028af624cf655ec12010fb39a555547e24da0e98564d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ULM2AM2I2MV3CG7RX2JVFGOKYC/bundle.json","state_url":"https://pith.science/pith/ULM2AM2I2MV3CG7RX2JVFGOKYC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ULM2AM2I2MV3CG7RX2JVFGOKYC/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":"2026-08-16T06:16:20Z","links":{"resolver":"https://pith.science/pith/ULM2AM2I2MV3CG7RX2JVFGOKYC","bundle":"https://pith.science/pith/ULM2AM2I2MV3CG7RX2JVFGOKYC/bundle.json","state":"https://pith.science/pith/ULM2AM2I2MV3CG7RX2JVFGOKYC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ULM2AM2I2MV3CG7RX2JVFGOKYC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:ULM2AM2I2MV3CG7RX2JVFGOKYC","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":"ae80482c6a15c6ae32b18583375fd38042d2a9c7a139c4bc2a0a0d869913e653","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-08-08T14:17:30Z","title_canon_sha256":"c627234281a3849a36819723219c35337463b51a8223fa6168571f0e281eaa34"},"schema_version":"1.0","source":{"id":"1908.03089","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.03089","created_at":"2026-07-05T00:03:51Z"},{"alias_kind":"arxiv_version","alias_value":"1908.03089v1","created_at":"2026-07-05T00:03:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.03089","created_at":"2026-07-05T00:03:51Z"},{"alias_kind":"pith_short_12","alias_value":"ULM2AM2I2MV3","created_at":"2026-07-05T00:03:51Z"},{"alias_kind":"pith_short_16","alias_value":"ULM2AM2I2MV3CG7R","created_at":"2026-07-05T00:03:51Z"},{"alias_kind":"pith_short_8","alias_value":"ULM2AM2I","created_at":"2026-07-05T00:03:51Z"}],"graph_snapshots":[{"event_id":"sha256:e4d23d9de62465c33d14028af624cf655ec12010fb39a555547e24da0e98564d","target":"graph","created_at":"2026-07-05T00:03:51Z","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/1908.03089/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We consider a series of MHD simulations in which a small amplitude, transverse velocity perturbation is introduced into a complex magnetic field. We analysed the deformation of the wave fronts as the perturbation propagates through the braided magnetic structures and explore the nature of Alfv\\'enic wave phase mixing in this regime. Spatial gradients in the local Alfv\\'en speed and variations in the length of magnetic field lines ensure that small scales form throughout the propagating wave front due to phase mixing. Additionally, the presence of complex, intricate current sheets associated wi","authors_text":"Alan Hood, Ineke De Moortel, Jack Reid, Thomas Howson","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-08-08T14:17:30Z","title":"Magnetohydrodynamic waves in braided magnetic fields"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.03089","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":"sha256:437f7ef523f5027a7b020a4827e3f1813fd4ab7a9e98ec2e78a5bf3ad2e0333f","target":"record","created_at":"2026-07-05T00:03:51Z","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":"ae80482c6a15c6ae32b18583375fd38042d2a9c7a139c4bc2a0a0d869913e653","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-08-08T14:17:30Z","title_canon_sha256":"c627234281a3849a36819723219c35337463b51a8223fa6168571f0e281eaa34"},"schema_version":"1.0","source":{"id":"1908.03089","kind":"arxiv","version":1}},"canonical_sha256":"a2d9a03348d32bb11bf1be935299cac09c8881546fdecba0786f2ed7fd60d4f0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a2d9a03348d32bb11bf1be935299cac09c8881546fdecba0786f2ed7fd60d4f0","first_computed_at":"2026-07-05T00:03:51.491792Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:03:51.491792Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Ln27ZkbhBnLIpYtd5bjf0xcpLp3+VYc8ks+fN0ict6YJeth6x13NA5SQF3ovOFGywmhFby7pg96FJRr/boOzCQ==","signature_status":"signed_v1","signed_at":"2026-07-05T00:03:51.492414Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.03089","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:437f7ef523f5027a7b020a4827e3f1813fd4ab7a9e98ec2e78a5bf3ad2e0333f","sha256:e4d23d9de62465c33d14028af624cf655ec12010fb39a555547e24da0e98564d"],"state_sha256":"ce41c096cab711492ea81a80f1860b6e5f5fd2855922857997675a18fefc1722"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zr9tRtZJKTL95IVHGBc7UA9LSKOZCOELuGbmLEcvqb1kHklUBxTRCVXKGXlIncA6/xg+qcxp4G6Onx26RlIvBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-16T06:16:20.275987Z","bundle_sha256":"7a5bce7fc6b79efb5948af068c698490f6b99d6597be949eda12b7907cc3c713"}}