{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:ZOEN6P6ACQ7ZOWZEKHPPIQOK2W","short_pith_number":"pith:ZOEN6P6A","canonical_record":{"source":{"id":"2004.12510","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-04-26T23:57:12Z","cross_cats_sorted":[],"title_canon_sha256":"fb3a79e21f14f39435442f36edede80cf81f6de6455fe1fd9649c8b485c23f05","abstract_canon_sha256":"4dc954ac3acc27b7436c3e9fc4f255a2655a29087680206be10de67f683ead85"},"schema_version":"1.0"},"canonical_sha256":"cb88df3fc0143f975b2451def441cad5897e77e722ad9b44a51f15b28dc18b96","source":{"kind":"arxiv","id":"2004.12510","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2004.12510","created_at":"2026-07-05T01:30:00Z"},{"alias_kind":"arxiv_version","alias_value":"2004.12510v1","created_at":"2026-07-05T01:30:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2004.12510","created_at":"2026-07-05T01:30:00Z"},{"alias_kind":"pith_short_12","alias_value":"ZOEN6P6ACQ7Z","created_at":"2026-07-05T01:30:00Z"},{"alias_kind":"pith_short_16","alias_value":"ZOEN6P6ACQ7ZOWZE","created_at":"2026-07-05T01:30:00Z"},{"alias_kind":"pith_short_8","alias_value":"ZOEN6P6A","created_at":"2026-07-05T01:30:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:ZOEN6P6ACQ7ZOWZEKHPPIQOK2W","target":"record","payload":{"canonical_record":{"source":{"id":"2004.12510","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-04-26T23:57:12Z","cross_cats_sorted":[],"title_canon_sha256":"fb3a79e21f14f39435442f36edede80cf81f6de6455fe1fd9649c8b485c23f05","abstract_canon_sha256":"4dc954ac3acc27b7436c3e9fc4f255a2655a29087680206be10de67f683ead85"},"schema_version":"1.0"},"canonical_sha256":"cb88df3fc0143f975b2451def441cad5897e77e722ad9b44a51f15b28dc18b96","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:30:00.942574Z","signature_b64":"LvjFGDGZc1v0y1GGfkQGOH+kz9zjDY6mKnhLoPxR2wnAmGjEJSxuU3rVOrbBxNnsmLDPcalZGp1/Uuda1WtYCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cb88df3fc0143f975b2451def441cad5897e77e722ad9b44a51f15b28dc18b96","last_reissued_at":"2026-07-05T01:30:00.942045Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:30:00.942045Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2004.12510","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":"2026-07-05T01:30:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZhkYVIhytO3h5FQl9G4t3qY5PsELMl3Gd4q6oC6PiCBIeVRpdNMNj+V2QQVVBOJXxekswYlXufGJezkGNQ1eDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T12:26:35.674886Z"},"content_sha256":"93e5f8f5d09c9045cba18605c7624da2d9631bcf4a6e9f191936286210e3663a","schema_version":"1.0","event_id":"sha256:93e5f8f5d09c9045cba18605c7624da2d9631bcf4a6e9f191936286210e3663a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:ZOEN6P6ACQ7ZOWZEKHPPIQOK2W","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Self-consistent Nonlinear Force-free Field Reconstruction from Weighted Boundary Conditions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Alpha Mastrano, Kai E. Yang, Michael S. Wheatland","submitted_at":"2020-04-26T23:57:12Z","abstract_excerpt":"Vector magnetogram data are often used as photospheric boundary conditions for force-free coronal magnetic field extrapolations. In general, however, vector magnetogram data are not consistent with the force-free assumption. In this article, we demonstrate a way to deal with inconsistent boundary data, by generalizing the \"self-consistency procedure\" of Wheatland & Regnier (2009). In that procedure, the inconsistency is resolved by an iterative process of constructing two solutions based on the values of the force-free parameter alpha on the two polarities of the field in the boundary (the P a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2004.12510","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/2004.12510/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":"2026-07-05T01:30:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0O3HXmbJ6fKOl6bgT8sfuDoGacdAQUfParPaJ3q22x0LW/lriRLa/U+0CtVVxW7E22BsaocETDKvAIKv5YF+Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T12:26:35.675248Z"},"content_sha256":"a8b4a2251a21688c67eda11a9b9f36d9334d7f9c7a1589f8a77dac2cf9091f00","schema_version":"1.0","event_id":"sha256:a8b4a2251a21688c67eda11a9b9f36d9334d7f9c7a1589f8a77dac2cf9091f00"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZOEN6P6ACQ7ZOWZEKHPPIQOK2W/bundle.json","state_url":"https://pith.science/pith/ZOEN6P6ACQ7ZOWZEKHPPIQOK2W/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZOEN6P6ACQ7ZOWZEKHPPIQOK2W/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":"2026-07-07T12:26:35Z","links":{"resolver":"https://pith.science/pith/ZOEN6P6ACQ7ZOWZEKHPPIQOK2W","bundle":"https://pith.science/pith/ZOEN6P6ACQ7ZOWZEKHPPIQOK2W/bundle.json","state":"https://pith.science/pith/ZOEN6P6ACQ7ZOWZEKHPPIQOK2W/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZOEN6P6ACQ7ZOWZEKHPPIQOK2W/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:ZOEN6P6ACQ7ZOWZEKHPPIQOK2W","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":"4dc954ac3acc27b7436c3e9fc4f255a2655a29087680206be10de67f683ead85","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-04-26T23:57:12Z","title_canon_sha256":"fb3a79e21f14f39435442f36edede80cf81f6de6455fe1fd9649c8b485c23f05"},"schema_version":"1.0","source":{"id":"2004.12510","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2004.12510","created_at":"2026-07-05T01:30:00Z"},{"alias_kind":"arxiv_version","alias_value":"2004.12510v1","created_at":"2026-07-05T01:30:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2004.12510","created_at":"2026-07-05T01:30:00Z"},{"alias_kind":"pith_short_12","alias_value":"ZOEN6P6ACQ7Z","created_at":"2026-07-05T01:30:00Z"},{"alias_kind":"pith_short_16","alias_value":"ZOEN6P6ACQ7ZOWZE","created_at":"2026-07-05T01:30:00Z"},{"alias_kind":"pith_short_8","alias_value":"ZOEN6P6A","created_at":"2026-07-05T01:30:00Z"}],"graph_snapshots":[{"event_id":"sha256:a8b4a2251a21688c67eda11a9b9f36d9334d7f9c7a1589f8a77dac2cf9091f00","target":"graph","created_at":"2026-07-05T01:30:00Z","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/2004.12510/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Vector magnetogram data are often used as photospheric boundary conditions for force-free coronal magnetic field extrapolations. In general, however, vector magnetogram data are not consistent with the force-free assumption. In this article, we demonstrate a way to deal with inconsistent boundary data, by generalizing the \"self-consistency procedure\" of Wheatland & Regnier (2009). In that procedure, the inconsistency is resolved by an iterative process of constructing two solutions based on the values of the force-free parameter alpha on the two polarities of the field in the boundary (the P a","authors_text":"Alpha Mastrano, Kai E. Yang, Michael S. Wheatland","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-04-26T23:57:12Z","title":"Self-consistent Nonlinear Force-free Field Reconstruction from Weighted Boundary Conditions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2004.12510","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":"sha256:93e5f8f5d09c9045cba18605c7624da2d9631bcf4a6e9f191936286210e3663a","target":"record","created_at":"2026-07-05T01:30:00Z","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":"4dc954ac3acc27b7436c3e9fc4f255a2655a29087680206be10de67f683ead85","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-04-26T23:57:12Z","title_canon_sha256":"fb3a79e21f14f39435442f36edede80cf81f6de6455fe1fd9649c8b485c23f05"},"schema_version":"1.0","source":{"id":"2004.12510","kind":"arxiv","version":1}},"canonical_sha256":"cb88df3fc0143f975b2451def441cad5897e77e722ad9b44a51f15b28dc18b96","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cb88df3fc0143f975b2451def441cad5897e77e722ad9b44a51f15b28dc18b96","first_computed_at":"2026-07-05T01:30:00.942045Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:30:00.942045Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LvjFGDGZc1v0y1GGfkQGOH+kz9zjDY6mKnhLoPxR2wnAmGjEJSxuU3rVOrbBxNnsmLDPcalZGp1/Uuda1WtYCQ==","signature_status":"signed_v1","signed_at":"2026-07-05T01:30:00.942574Z","signed_message":"canonical_sha256_bytes"},"source_id":"2004.12510","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:93e5f8f5d09c9045cba18605c7624da2d9631bcf4a6e9f191936286210e3663a","sha256:a8b4a2251a21688c67eda11a9b9f36d9334d7f9c7a1589f8a77dac2cf9091f00"],"state_sha256":"e0e74df021876f3f0bb4156f88d61d62457eb3867a95d55832b81aac42e33bfe"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zN6Zl3S0Yml0oQwhhUs3yI1Gyzy2Eo4pA3SdjHfMXHHnIowiS7syvEBt+QEh1L5DN4a79FkDpcmSIOrqVzObBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T12:26:35.677294Z","bundle_sha256":"4e1c8e596fa1bb14d5a950415fbeb585c1b70a60b640804f843d771030d51fa8"}}