{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:Z2FLPVUZK2ELHDQPVFZ67EXH2Z","short_pith_number":"pith:Z2FLPVUZ","canonical_record":{"source":{"id":"0907.3820","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-07-22T13:31:05Z","cross_cats_sorted":[],"title_canon_sha256":"0307c45cf6e9269eeb3e28395537092cf2f24a34393b6b46b1ae0b3ae22a27b1","abstract_canon_sha256":"aaa039204ba382781c36b33b0f87aeba93857cf0d2f449e35ad45e6d47109f7e"},"schema_version":"1.0"},"canonical_sha256":"ce8ab7d6995688b38e0fa973ef92e7d6492e856cebb50360b503729c7a925032","source":{"kind":"arxiv","id":"0907.3820","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0907.3820","created_at":"2026-05-18T02:12:54Z"},{"alias_kind":"arxiv_version","alias_value":"0907.3820v1","created_at":"2026-05-18T02:12:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0907.3820","created_at":"2026-05-18T02:12:54Z"},{"alias_kind":"pith_short_12","alias_value":"Z2FLPVUZK2EL","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"Z2FLPVUZK2ELHDQP","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"Z2FLPVUZ","created_at":"2026-05-18T12:26:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:Z2FLPVUZK2ELHDQPVFZ67EXH2Z","target":"record","payload":{"canonical_record":{"source":{"id":"0907.3820","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-07-22T13:31:05Z","cross_cats_sorted":[],"title_canon_sha256":"0307c45cf6e9269eeb3e28395537092cf2f24a34393b6b46b1ae0b3ae22a27b1","abstract_canon_sha256":"aaa039204ba382781c36b33b0f87aeba93857cf0d2f449e35ad45e6d47109f7e"},"schema_version":"1.0"},"canonical_sha256":"ce8ab7d6995688b38e0fa973ef92e7d6492e856cebb50360b503729c7a925032","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:12:54.728139Z","signature_b64":"FO14/ZhYe23mgIfERwjoASq2tQbWK+/i5uu0fqM97iwWLJ63pJNDQGTUAAQ1wyiW3mvxKglhz3WXplupU5ObBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ce8ab7d6995688b38e0fa973ef92e7d6492e856cebb50360b503729c7a925032","last_reissued_at":"2026-05-18T02:12:54.727569Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:12:54.727569Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0907.3820","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":"2026-05-18T02:12:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+Hb1fCxbhzWNlT4D4I8hvPf0ra5eJaxHLrNrgTIDOCHncbaZZ7wCfaDIaFupN604/VStrRX9wG1gSRFfsDT5Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T07:43:53.721179Z"},"content_sha256":"3f1fed543aaea8f4703875985486fb025c0892d37449d2ddba730c3041672f5b","schema_version":"1.0","event_id":"sha256:3f1fed543aaea8f4703875985486fb025c0892d37449d2ddba730c3041672f5b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:Z2FLPVUZK2ELHDQPVFZ67EXH2Z","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Magnetic Braiding and Quasi-Separatrix Layers","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A.L. Wilmot-Smith, D.I. Pontin, G. Hornig","submitted_at":"2009-07-22T13:31:05Z","abstract_excerpt":"The squashing factor Q (Titov et al. 2002), a property of the magnetic field line mapping, has been suggested as an indicator for the formation of current sheets, and subsequently magnetic reconnection, in astrophysical plasmas. Here we test this hypothesis for a particular class of braided magnetic fields which serve as a model for solar coronal loops. We explore the relationship between Quasi-Separatrix Layers (QSLs), that is, layer-like structures with high Q value, electric currents and integrated parallel currents, the latter being a quantity closely related to the reconnection rate. It i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0907.3820","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":"2026-05-18T02:12:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RoCq1oAHKip47IvpRW0q1TSf1yRilW1T4ksixHugWd35riGvgLAOJBIXKrYRaqJHR5qc6aSbwCFMxBaXez8QAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T07:43:53.721549Z"},"content_sha256":"fe385ca1814539a4cf7265cbd990fac2c2d6f50821d1e5e47108ac62ccc15c54","schema_version":"1.0","event_id":"sha256:fe385ca1814539a4cf7265cbd990fac2c2d6f50821d1e5e47108ac62ccc15c54"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Z2FLPVUZK2ELHDQPVFZ67EXH2Z/bundle.json","state_url":"https://pith.science/pith/Z2FLPVUZK2ELHDQPVFZ67EXH2Z/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Z2FLPVUZK2ELHDQPVFZ67EXH2Z/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":"2026-06-03T07:43:53Z","links":{"resolver":"https://pith.science/pith/Z2FLPVUZK2ELHDQPVFZ67EXH2Z","bundle":"https://pith.science/pith/Z2FLPVUZK2ELHDQPVFZ67EXH2Z/bundle.json","state":"https://pith.science/pith/Z2FLPVUZK2ELHDQPVFZ67EXH2Z/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Z2FLPVUZK2ELHDQPVFZ67EXH2Z/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:Z2FLPVUZK2ELHDQPVFZ67EXH2Z","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":"aaa039204ba382781c36b33b0f87aeba93857cf0d2f449e35ad45e6d47109f7e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-07-22T13:31:05Z","title_canon_sha256":"0307c45cf6e9269eeb3e28395537092cf2f24a34393b6b46b1ae0b3ae22a27b1"},"schema_version":"1.0","source":{"id":"0907.3820","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0907.3820","created_at":"2026-05-18T02:12:54Z"},{"alias_kind":"arxiv_version","alias_value":"0907.3820v1","created_at":"2026-05-18T02:12:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0907.3820","created_at":"2026-05-18T02:12:54Z"},{"alias_kind":"pith_short_12","alias_value":"Z2FLPVUZK2EL","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"Z2FLPVUZK2ELHDQP","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"Z2FLPVUZ","created_at":"2026-05-18T12:26:02Z"}],"graph_snapshots":[{"event_id":"sha256:fe385ca1814539a4cf7265cbd990fac2c2d6f50821d1e5e47108ac62ccc15c54","target":"graph","created_at":"2026-05-18T02:12:54Z","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":"The squashing factor Q (Titov et al. 2002), a property of the magnetic field line mapping, has been suggested as an indicator for the formation of current sheets, and subsequently magnetic reconnection, in astrophysical plasmas. Here we test this hypothesis for a particular class of braided magnetic fields which serve as a model for solar coronal loops. We explore the relationship between Quasi-Separatrix Layers (QSLs), that is, layer-like structures with high Q value, electric currents and integrated parallel currents, the latter being a quantity closely related to the reconnection rate. It i","authors_text":"A.L. Wilmot-Smith, D.I. Pontin, G. Hornig","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-07-22T13:31:05Z","title":"Magnetic Braiding and Quasi-Separatrix Layers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0907.3820","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":"sha256:3f1fed543aaea8f4703875985486fb025c0892d37449d2ddba730c3041672f5b","target":"record","created_at":"2026-05-18T02:12:54Z","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":"aaa039204ba382781c36b33b0f87aeba93857cf0d2f449e35ad45e6d47109f7e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-07-22T13:31:05Z","title_canon_sha256":"0307c45cf6e9269eeb3e28395537092cf2f24a34393b6b46b1ae0b3ae22a27b1"},"schema_version":"1.0","source":{"id":"0907.3820","kind":"arxiv","version":1}},"canonical_sha256":"ce8ab7d6995688b38e0fa973ef92e7d6492e856cebb50360b503729c7a925032","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ce8ab7d6995688b38e0fa973ef92e7d6492e856cebb50360b503729c7a925032","first_computed_at":"2026-05-18T02:12:54.727569Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:12:54.727569Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"FO14/ZhYe23mgIfERwjoASq2tQbWK+/i5uu0fqM97iwWLJ63pJNDQGTUAAQ1wyiW3mvxKglhz3WXplupU5ObBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:12:54.728139Z","signed_message":"canonical_sha256_bytes"},"source_id":"0907.3820","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3f1fed543aaea8f4703875985486fb025c0892d37449d2ddba730c3041672f5b","sha256:fe385ca1814539a4cf7265cbd990fac2c2d6f50821d1e5e47108ac62ccc15c54"],"state_sha256":"a61ec0d507377b133c0e0eec53653be0c69a0bbf374e7a3996d35119fe617ae7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iXeV2BezIt+56C6ywd8nJwsF37SLPkCfLw3NheBmBRsexsieaZ9e1g+r/B4tS6SB8F9dTIiOAZ0KFRLIa8T8BA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T07:43:53.723560Z","bundle_sha256":"70dcf47a8ac43cdb2b8f1c16e582aad4d66f143d6a87996208082fc0e6e19ce0"}}