{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:VEESBS77TPT2C745DYFVBOBKCI","short_pith_number":"pith:VEESBS77","canonical_record":{"source":{"id":"2109.01069","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-09-02T16:37:35Z","cross_cats_sorted":["physics.plasm-ph","physics.space-ph"],"title_canon_sha256":"2a3dfd9044746f2fec918e29ff6e5fb5aa54e6ff62d63a2282beb2bbe7a2b2de","abstract_canon_sha256":"efa8306fa8bcb894e56205170a0d416cb22d1d791afa391be72686bbf9e444b8"},"schema_version":"1.0"},"canonical_sha256":"a90920cbff9be7a17f9d1e0b50b82a12157cdfc09d76658eccce0a883c769068","source":{"kind":"arxiv","id":"2109.01069","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2109.01069","created_at":"2026-07-05T03:45:42Z"},{"alias_kind":"arxiv_version","alias_value":"2109.01069v1","created_at":"2026-07-05T03:45:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.01069","created_at":"2026-07-05T03:45:42Z"},{"alias_kind":"pith_short_12","alias_value":"VEESBS77TPT2","created_at":"2026-07-05T03:45:42Z"},{"alias_kind":"pith_short_16","alias_value":"VEESBS77TPT2C745","created_at":"2026-07-05T03:45:42Z"},{"alias_kind":"pith_short_8","alias_value":"VEESBS77","created_at":"2026-07-05T03:45:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:VEESBS77TPT2C745DYFVBOBKCI","target":"record","payload":{"canonical_record":{"source":{"id":"2109.01069","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-09-02T16:37:35Z","cross_cats_sorted":["physics.plasm-ph","physics.space-ph"],"title_canon_sha256":"2a3dfd9044746f2fec918e29ff6e5fb5aa54e6ff62d63a2282beb2bbe7a2b2de","abstract_canon_sha256":"efa8306fa8bcb894e56205170a0d416cb22d1d791afa391be72686bbf9e444b8"},"schema_version":"1.0"},"canonical_sha256":"a90920cbff9be7a17f9d1e0b50b82a12157cdfc09d76658eccce0a883c769068","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:45:42.150883Z","signature_b64":"nJXFW7xrvSGMZVEMdWijxvGPmDFM2FbBNDWdz3U5BYpxRlpbZbdjYmbGv6NQJoQTtj+Qll5hL2elWJvTkaRaAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a90920cbff9be7a17f9d1e0b50b82a12157cdfc09d76658eccce0a883c769068","last_reissued_at":"2026-07-05T03:45:42.150364Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:45:42.150364Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2109.01069","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":"2026-07-05T03:45:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Mq5hHyvvX7PxjeiyF9fRhZI/C2pCwAmVfpxpabgOvd3MlyljCenrzWtaG8jTKyQWB/xYsth+gfB8wnnF6S0zBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T12:31:16.734130Z"},"content_sha256":"b88e436155f25049b4d968c10a61a674cf732db2b6a6c5cedcfba0d1e2c460c5","schema_version":"1.0","event_id":"sha256:b88e436155f25049b4d968c10a61a674cf732db2b6a6c5cedcfba0d1e2c460c5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:VEESBS77TPT2C745DYFVBOBKCI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A solar source of Alfv\\'enic magnetic field switchbacks: {\\em in situ} remnants of magnetic funnels on supergranulation scales","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["physics.plasm-ph","physics.space-ph"],"primary_cat":"astro-ph.SR","authors_text":"A. Mallet, B. D. G. Chandran, J. C. Kasper, J. F. Drake, J. S. Halekas, J. Squire, L. D. Woodham, L Matteini, M. D. McManus, M. I. Desai, M. Velli, N. E. Raouafi, O. Panasenco, R. Laker, S. D. Bale, S. T. Badman, T. A. Bowen, T. D. Phan, T. S. Horbury, T. Wooley","submitted_at":"2021-09-02T16:37:35Z","abstract_excerpt":"One of the striking observations from the Parker Solar Probe (PSP) spacecraft is the prevalence in the inner heliosphere of large amplitude, Alfv\\'enic magnetic field reversals termed 'switchbacks'. These $\\delta B_R/B \\sim \\mathcal{O}(1$) fluctuations occur on a range of timescales and in {\\em patches} separated by intervals of quiet, radial magnetic field. We use measurements from PSP to demonstrate that patches of switchbacks are localized within the extensions of plasma structures originating at the base of the corona. These structures are characterized by an increase in alpha particle abu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.01069","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/2109.01069/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":"2026-07-05T03:45:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uwThcJWbs5tHzUwRJN/KkNoxqTJBBpet6ZJnHYzgsdAvGAzWX95gq+kv88xXldo9F97ZH1ScFWkizFN7RfdvCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T12:31:16.734544Z"},"content_sha256":"eb3e1fbddd370411f62784c5b600c844346a02223f4f3ac7fe8c536a121fae10","schema_version":"1.0","event_id":"sha256:eb3e1fbddd370411f62784c5b600c844346a02223f4f3ac7fe8c536a121fae10"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VEESBS77TPT2C745DYFVBOBKCI/bundle.json","state_url":"https://pith.science/pith/VEESBS77TPT2C745DYFVBOBKCI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VEESBS77TPT2C745DYFVBOBKCI/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":"2026-07-05T12:31:16Z","links":{"resolver":"https://pith.science/pith/VEESBS77TPT2C745DYFVBOBKCI","bundle":"https://pith.science/pith/VEESBS77TPT2C745DYFVBOBKCI/bundle.json","state":"https://pith.science/pith/VEESBS77TPT2C745DYFVBOBKCI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VEESBS77TPT2C745DYFVBOBKCI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:VEESBS77TPT2C745DYFVBOBKCI","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":"efa8306fa8bcb894e56205170a0d416cb22d1d791afa391be72686bbf9e444b8","cross_cats_sorted":["physics.plasm-ph","physics.space-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-09-02T16:37:35Z","title_canon_sha256":"2a3dfd9044746f2fec918e29ff6e5fb5aa54e6ff62d63a2282beb2bbe7a2b2de"},"schema_version":"1.0","source":{"id":"2109.01069","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2109.01069","created_at":"2026-07-05T03:45:42Z"},{"alias_kind":"arxiv_version","alias_value":"2109.01069v1","created_at":"2026-07-05T03:45:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.01069","created_at":"2026-07-05T03:45:42Z"},{"alias_kind":"pith_short_12","alias_value":"VEESBS77TPT2","created_at":"2026-07-05T03:45:42Z"},{"alias_kind":"pith_short_16","alias_value":"VEESBS77TPT2C745","created_at":"2026-07-05T03:45:42Z"},{"alias_kind":"pith_short_8","alias_value":"VEESBS77","created_at":"2026-07-05T03:45:42Z"}],"graph_snapshots":[{"event_id":"sha256:eb3e1fbddd370411f62784c5b600c844346a02223f4f3ac7fe8c536a121fae10","target":"graph","created_at":"2026-07-05T03:45:42Z","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/2109.01069/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"One of the striking observations from the Parker Solar Probe (PSP) spacecraft is the prevalence in the inner heliosphere of large amplitude, Alfv\\'enic magnetic field reversals termed 'switchbacks'. These $\\delta B_R/B \\sim \\mathcal{O}(1$) fluctuations occur on a range of timescales and in {\\em patches} separated by intervals of quiet, radial magnetic field. We use measurements from PSP to demonstrate that patches of switchbacks are localized within the extensions of plasma structures originating at the base of the corona. These structures are characterized by an increase in alpha particle abu","authors_text":"A. Mallet, B. D. G. Chandran, J. C. Kasper, J. F. Drake, J. S. Halekas, J. Squire, L. D. Woodham, L Matteini, M. D. McManus, M. I. Desai, M. Velli, N. E. Raouafi, O. Panasenco, R. Laker, S. D. Bale, S. T. Badman, T. A. Bowen, T. D. Phan, T. S. Horbury, T. Wooley","cross_cats":["physics.plasm-ph","physics.space-ph"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-09-02T16:37:35Z","title":"A solar source of Alfv\\'enic magnetic field switchbacks: {\\em in situ} remnants of magnetic funnels on supergranulation scales"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.01069","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:b88e436155f25049b4d968c10a61a674cf732db2b6a6c5cedcfba0d1e2c460c5","target":"record","created_at":"2026-07-05T03:45:42Z","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":"efa8306fa8bcb894e56205170a0d416cb22d1d791afa391be72686bbf9e444b8","cross_cats_sorted":["physics.plasm-ph","physics.space-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-09-02T16:37:35Z","title_canon_sha256":"2a3dfd9044746f2fec918e29ff6e5fb5aa54e6ff62d63a2282beb2bbe7a2b2de"},"schema_version":"1.0","source":{"id":"2109.01069","kind":"arxiv","version":1}},"canonical_sha256":"a90920cbff9be7a17f9d1e0b50b82a12157cdfc09d76658eccce0a883c769068","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a90920cbff9be7a17f9d1e0b50b82a12157cdfc09d76658eccce0a883c769068","first_computed_at":"2026-07-05T03:45:42.150364Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:45:42.150364Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nJXFW7xrvSGMZVEMdWijxvGPmDFM2FbBNDWdz3U5BYpxRlpbZbdjYmbGv6NQJoQTtj+Qll5hL2elWJvTkaRaAA==","signature_status":"signed_v1","signed_at":"2026-07-05T03:45:42.150883Z","signed_message":"canonical_sha256_bytes"},"source_id":"2109.01069","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b88e436155f25049b4d968c10a61a674cf732db2b6a6c5cedcfba0d1e2c460c5","sha256:eb3e1fbddd370411f62784c5b600c844346a02223f4f3ac7fe8c536a121fae10"],"state_sha256":"74a8d17f4814f75c36cd6c3d1fb078ce9502169aee327b5c3c09638c0d33b1be"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yYzG1ZpjSGTL1wTKRNLvbBCeEk8YuZ8rUQHgxKVr1tmnhIa5GGMf8oB+1s+GrSgXCkanawPgrIdMFRjfcVNHBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-05T12:31:16.736646Z","bundle_sha256":"96689f5039480d033238f2d3ba3457008f63a03f242ac5a09b32ea505c13df5f"}}