{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:J5TBQLFVENG5YN5KRU7DKMQL65","short_pith_number":"pith:J5TBQLFV","canonical_record":{"source":{"id":"1210.0998","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-10-03T06:20:16Z","cross_cats_sorted":[],"title_canon_sha256":"58a3cae8adbd10267d49f76c5e128229833ec16d7d0d486129e7d7ea6d82b2c8","abstract_canon_sha256":"91ca91eef0d3fc2894fcb89d66c8d23ad3603e6cfbea1762d18883b8f40ec454"},"schema_version":"1.0"},"canonical_sha256":"4f66182cb5234ddc37aa8d3e35320bf77e4e553028bab16c0b17225b1fa3d00f","source":{"kind":"arxiv","id":"1210.0998","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.0998","created_at":"2026-05-18T01:54:11Z"},{"alias_kind":"arxiv_version","alias_value":"1210.0998v1","created_at":"2026-05-18T01:54:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.0998","created_at":"2026-05-18T01:54:11Z"},{"alias_kind":"pith_short_12","alias_value":"J5TBQLFVENG5","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_16","alias_value":"J5TBQLFVENG5YN5K","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_8","alias_value":"J5TBQLFV","created_at":"2026-05-18T12:27:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:J5TBQLFVENG5YN5KRU7DKMQL65","target":"record","payload":{"canonical_record":{"source":{"id":"1210.0998","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-10-03T06:20:16Z","cross_cats_sorted":[],"title_canon_sha256":"58a3cae8adbd10267d49f76c5e128229833ec16d7d0d486129e7d7ea6d82b2c8","abstract_canon_sha256":"91ca91eef0d3fc2894fcb89d66c8d23ad3603e6cfbea1762d18883b8f40ec454"},"schema_version":"1.0"},"canonical_sha256":"4f66182cb5234ddc37aa8d3e35320bf77e4e553028bab16c0b17225b1fa3d00f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:54:11.248074Z","signature_b64":"nGBY7iPnGrR3tR2W8x7zr479nZ201VbBSrnW9KWl9ttHrwWywwhd6B9wQowOwyeM/kn48yXYuhBqTaegKPyOCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4f66182cb5234ddc37aa8d3e35320bf77e4e553028bab16c0b17225b1fa3d00f","last_reissued_at":"2026-05-18T01:54:11.247464Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:54:11.247464Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1210.0998","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":"2026-05-18T01:54:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aMi6kDVLvurONNTu0iX2EDI3FV3FaqbG8RwG/IagqzakxsyMgKg95Oby456aroZdp0QnkR6xBDik6vYjyMghBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T23:06:53.696543Z"},"content_sha256":"409d78ef4bd20db6803fceaf1d86ce0cbd2c25f3027c01c1a15212d06b837624","schema_version":"1.0","event_id":"sha256:409d78ef4bd20db6803fceaf1d86ce0cbd2c25f3027c01c1a15212d06b837624"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:J5TBQLFVENG5YN5KRU7DKMQL65","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Modeling Magnetic Field Structure of a Solar Active Region Corona using Nonlinear Force-Free Fields in Spherical Geometry","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"M. D. Ding, M. L. Derosa, T. Wiegelmann, X. D. Sun, Y. Guo, Y. Liu","submitted_at":"2012-10-03T06:20:16Z","abstract_excerpt":"We test a nonlinear force-free field (NLFFF) optimization code in spherical geometry using an analytical solution from Low and Lou. Several tests are run, ranging from idealized cases where exact vector field data are provided on all boundaries, to cases where noisy vector data are provided on only the lower boundary (approximating the solar problem). Analytical tests also show that the NLFFF code in the spherical geometry performs better than that in the Cartesian one when the field of view of the bottom boundary is large, say, $20^\\circ \\times 20^\\circ$. Additionally, We apply the NLFFF mode"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.0998","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":"2026-05-18T01:54:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YKlwkp66WKWPuPNNDdGJo0qD5Dj/xq2THIXs6y5WQ0s/Y9SctlPrK6bs44D4JTt6Fs/O8rwbIOvgk5yiaApfDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T23:06:53.696891Z"},"content_sha256":"e583d41ebab976b8dca2233f3a08f16e3a5e34abee94dd136a9947b313a1fb7b","schema_version":"1.0","event_id":"sha256:e583d41ebab976b8dca2233f3a08f16e3a5e34abee94dd136a9947b313a1fb7b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/J5TBQLFVENG5YN5KRU7DKMQL65/bundle.json","state_url":"https://pith.science/pith/J5TBQLFVENG5YN5KRU7DKMQL65/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/J5TBQLFVENG5YN5KRU7DKMQL65/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":"2026-06-02T23:06:53Z","links":{"resolver":"https://pith.science/pith/J5TBQLFVENG5YN5KRU7DKMQL65","bundle":"https://pith.science/pith/J5TBQLFVENG5YN5KRU7DKMQL65/bundle.json","state":"https://pith.science/pith/J5TBQLFVENG5YN5KRU7DKMQL65/state.json","well_known_bundle":"https://pith.science/.well-known/pith/J5TBQLFVENG5YN5KRU7DKMQL65/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:J5TBQLFVENG5YN5KRU7DKMQL65","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":"91ca91eef0d3fc2894fcb89d66c8d23ad3603e6cfbea1762d18883b8f40ec454","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-10-03T06:20:16Z","title_canon_sha256":"58a3cae8adbd10267d49f76c5e128229833ec16d7d0d486129e7d7ea6d82b2c8"},"schema_version":"1.0","source":{"id":"1210.0998","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.0998","created_at":"2026-05-18T01:54:11Z"},{"alias_kind":"arxiv_version","alias_value":"1210.0998v1","created_at":"2026-05-18T01:54:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.0998","created_at":"2026-05-18T01:54:11Z"},{"alias_kind":"pith_short_12","alias_value":"J5TBQLFVENG5","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_16","alias_value":"J5TBQLFVENG5YN5K","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_8","alias_value":"J5TBQLFV","created_at":"2026-05-18T12:27:09Z"}],"graph_snapshots":[{"event_id":"sha256:e583d41ebab976b8dca2233f3a08f16e3a5e34abee94dd136a9947b313a1fb7b","target":"graph","created_at":"2026-05-18T01:54:11Z","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 test a nonlinear force-free field (NLFFF) optimization code in spherical geometry using an analytical solution from Low and Lou. Several tests are run, ranging from idealized cases where exact vector field data are provided on all boundaries, to cases where noisy vector data are provided on only the lower boundary (approximating the solar problem). Analytical tests also show that the NLFFF code in the spherical geometry performs better than that in the Cartesian one when the field of view of the bottom boundary is large, say, $20^\\circ \\times 20^\\circ$. Additionally, We apply the NLFFF mode","authors_text":"M. D. Ding, M. L. Derosa, T. Wiegelmann, X. D. Sun, Y. Guo, Y. Liu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-10-03T06:20:16Z","title":"Modeling Magnetic Field Structure of a Solar Active Region Corona using Nonlinear Force-Free Fields in Spherical Geometry"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.0998","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":"sha256:409d78ef4bd20db6803fceaf1d86ce0cbd2c25f3027c01c1a15212d06b837624","target":"record","created_at":"2026-05-18T01:54:11Z","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":"91ca91eef0d3fc2894fcb89d66c8d23ad3603e6cfbea1762d18883b8f40ec454","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-10-03T06:20:16Z","title_canon_sha256":"58a3cae8adbd10267d49f76c5e128229833ec16d7d0d486129e7d7ea6d82b2c8"},"schema_version":"1.0","source":{"id":"1210.0998","kind":"arxiv","version":1}},"canonical_sha256":"4f66182cb5234ddc37aa8d3e35320bf77e4e553028bab16c0b17225b1fa3d00f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4f66182cb5234ddc37aa8d3e35320bf77e4e553028bab16c0b17225b1fa3d00f","first_computed_at":"2026-05-18T01:54:11.247464Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:54:11.247464Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nGBY7iPnGrR3tR2W8x7zr479nZ201VbBSrnW9KWl9ttHrwWywwhd6B9wQowOwyeM/kn48yXYuhBqTaegKPyOCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:54:11.248074Z","signed_message":"canonical_sha256_bytes"},"source_id":"1210.0998","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:409d78ef4bd20db6803fceaf1d86ce0cbd2c25f3027c01c1a15212d06b837624","sha256:e583d41ebab976b8dca2233f3a08f16e3a5e34abee94dd136a9947b313a1fb7b"],"state_sha256":"f52035c563fd3b8b23317ce449d1e4bff9d641bf8609ee89f488071d1fea7b10"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jysvcHsumQ/Td9p8wM73IjgJLmKofubFFFcGj2O7DmFnsPy56tZH3z0Yu2w4sz0ToTXLbGXfsQpZiWnChGsXCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T23:06:53.698803Z","bundle_sha256":"d72832b9b16cbcad2ae232fbe174ce7172f92d935bebd9116e6fa6f80c6d9aaa"}}