{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:IOABU4D7KJJTHEPRSN4W7DPCMY","short_pith_number":"pith:IOABU4D7","canonical_record":{"source":{"id":"1107.4801","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-07-24T21:22:47Z","cross_cats_sorted":[],"title_canon_sha256":"c2024965c504db832d858d12e2518b7b70d56f8694bfdc39a198c0b5f7b42674","abstract_canon_sha256":"37f711623de17767c4f8d06624dabec3195b3e387d459935c8f475cbe28ccaa8"},"schema_version":"1.0"},"canonical_sha256":"43801a707f52533391f193796f8de2662959755cc9fbc67044322aacce1ff14b","source":{"kind":"arxiv","id":"1107.4801","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1107.4801","created_at":"2026-05-18T04:04:06Z"},{"alias_kind":"arxiv_version","alias_value":"1107.4801v1","created_at":"2026-05-18T04:04:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1107.4801","created_at":"2026-05-18T04:04:06Z"},{"alias_kind":"pith_short_12","alias_value":"IOABU4D7KJJT","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_16","alias_value":"IOABU4D7KJJTHEPR","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_8","alias_value":"IOABU4D7","created_at":"2026-05-18T12:26:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:IOABU4D7KJJTHEPRSN4W7DPCMY","target":"record","payload":{"canonical_record":{"source":{"id":"1107.4801","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-07-24T21:22:47Z","cross_cats_sorted":[],"title_canon_sha256":"c2024965c504db832d858d12e2518b7b70d56f8694bfdc39a198c0b5f7b42674","abstract_canon_sha256":"37f711623de17767c4f8d06624dabec3195b3e387d459935c8f475cbe28ccaa8"},"schema_version":"1.0"},"canonical_sha256":"43801a707f52533391f193796f8de2662959755cc9fbc67044322aacce1ff14b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:04:06.636106Z","signature_b64":"OdmsdsML9rObDZE+j5L4TcmEP+pS7mdJe/sjsi3tBZ6NqCJX1bG512plrB2hx+N69grBldlIEIFgNTGFq3TWBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"43801a707f52533391f193796f8de2662959755cc9fbc67044322aacce1ff14b","last_reissued_at":"2026-05-18T04:04:06.635342Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:04:06.635342Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1107.4801","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":"2026-05-18T04:04:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4aFxl/xEfV5wfXr/R+IKHZEmEGUKjngtBnqIcUItT/Mh9WfA0MVPVpRrNfF+9QZ1WDBnsCZoz5cNCHDKGEbsAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T23:14:07.936817Z"},"content_sha256":"54dfb1c5a710a111a289a41238c8e8db00d04f985e54b99cf587c89870cbd951","schema_version":"1.0","event_id":"sha256:54dfb1c5a710a111a289a41238c8e8db00d04f985e54b99cf587c89870cbd951"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:IOABU4D7KJJTHEPRSN4W7DPCMY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Plasma flow vs. magnetic feature-tracking speeds in the Sun","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Brandenburg, G. Guerrero, M. Dikpati, M. Rheinhardt","submitted_at":"2011-07-24T21:22:47Z","abstract_excerpt":"We simulate the magnetic feature tracking (MFT) speed using advective-diffusive transport models in both one and two dimensions. By depositing magnetic bipolar regions at different latitudes at the Sun's surface and following their evolution for a prescribed meridional circulation and magnetic diffusivity profiles, we derive the MFT speed as a function of latitude. We find that in a one dimensional surface-transport model the simulated MFT speed at the surface is always the same as the meridional flow-speed used as input to the model, but is different in a two-dimensional transport model in th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1107.4801","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":"2026-05-18T04:04:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"clj2tgNUYUgVQSeiLuluxjsdZq4fMSnhyah3oZytnddmlP2EbbvrfPJcEDdJQAXvi03H+RCUKZGOMhzJ6B2DBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T23:14:07.937157Z"},"content_sha256":"39a6b20f1d19573af6b6b3d60e7a6c2423dc082b8066ada0a8abd8c2a500cf1f","schema_version":"1.0","event_id":"sha256:39a6b20f1d19573af6b6b3d60e7a6c2423dc082b8066ada0a8abd8c2a500cf1f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IOABU4D7KJJTHEPRSN4W7DPCMY/bundle.json","state_url":"https://pith.science/pith/IOABU4D7KJJTHEPRSN4W7DPCMY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IOABU4D7KJJTHEPRSN4W7DPCMY/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":"2026-06-28T23:14:07Z","links":{"resolver":"https://pith.science/pith/IOABU4D7KJJTHEPRSN4W7DPCMY","bundle":"https://pith.science/pith/IOABU4D7KJJTHEPRSN4W7DPCMY/bundle.json","state":"https://pith.science/pith/IOABU4D7KJJTHEPRSN4W7DPCMY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IOABU4D7KJJTHEPRSN4W7DPCMY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:IOABU4D7KJJTHEPRSN4W7DPCMY","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":"37f711623de17767c4f8d06624dabec3195b3e387d459935c8f475cbe28ccaa8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-07-24T21:22:47Z","title_canon_sha256":"c2024965c504db832d858d12e2518b7b70d56f8694bfdc39a198c0b5f7b42674"},"schema_version":"1.0","source":{"id":"1107.4801","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1107.4801","created_at":"2026-05-18T04:04:06Z"},{"alias_kind":"arxiv_version","alias_value":"1107.4801v1","created_at":"2026-05-18T04:04:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1107.4801","created_at":"2026-05-18T04:04:06Z"},{"alias_kind":"pith_short_12","alias_value":"IOABU4D7KJJT","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_16","alias_value":"IOABU4D7KJJTHEPR","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_8","alias_value":"IOABU4D7","created_at":"2026-05-18T12:26:32Z"}],"graph_snapshots":[{"event_id":"sha256:39a6b20f1d19573af6b6b3d60e7a6c2423dc082b8066ada0a8abd8c2a500cf1f","target":"graph","created_at":"2026-05-18T04:04:06Z","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 simulate the magnetic feature tracking (MFT) speed using advective-diffusive transport models in both one and two dimensions. By depositing magnetic bipolar regions at different latitudes at the Sun's surface and following their evolution for a prescribed meridional circulation and magnetic diffusivity profiles, we derive the MFT speed as a function of latitude. We find that in a one dimensional surface-transport model the simulated MFT speed at the surface is always the same as the meridional flow-speed used as input to the model, but is different in a two-dimensional transport model in th","authors_text":"A. Brandenburg, G. Guerrero, M. Dikpati, M. Rheinhardt","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-07-24T21:22:47Z","title":"Plasma flow vs. magnetic feature-tracking speeds in the Sun"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1107.4801","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":"sha256:54dfb1c5a710a111a289a41238c8e8db00d04f985e54b99cf587c89870cbd951","target":"record","created_at":"2026-05-18T04:04:06Z","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":"37f711623de17767c4f8d06624dabec3195b3e387d459935c8f475cbe28ccaa8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-07-24T21:22:47Z","title_canon_sha256":"c2024965c504db832d858d12e2518b7b70d56f8694bfdc39a198c0b5f7b42674"},"schema_version":"1.0","source":{"id":"1107.4801","kind":"arxiv","version":1}},"canonical_sha256":"43801a707f52533391f193796f8de2662959755cc9fbc67044322aacce1ff14b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"43801a707f52533391f193796f8de2662959755cc9fbc67044322aacce1ff14b","first_computed_at":"2026-05-18T04:04:06.635342Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:04:06.635342Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OdmsdsML9rObDZE+j5L4TcmEP+pS7mdJe/sjsi3tBZ6NqCJX1bG512plrB2hx+N69grBldlIEIFgNTGFq3TWBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:04:06.636106Z","signed_message":"canonical_sha256_bytes"},"source_id":"1107.4801","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:54dfb1c5a710a111a289a41238c8e8db00d04f985e54b99cf587c89870cbd951","sha256:39a6b20f1d19573af6b6b3d60e7a6c2423dc082b8066ada0a8abd8c2a500cf1f"],"state_sha256":"35a9b67afdf7da0945d0365ffb4355db8140ef423754055001a6be5e26c6e25b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7I0DVPyKlUsH3TgsrkP2pQsCzJ7cS7zSo/WCkB0D5C4oaoumszOe/X7tbN9/x3+tyyC8pSSTapS5esQdLlcEBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-28T23:14:07.939116Z","bundle_sha256":"c70be10be96c17b768c03e77b194f6b43d18d0846e365eb8d792fbb7deaee9a1"}}