{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:GZ26C3D3GB46NX44OZS5GOZE2S","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":"6e43b23457d90c0e538e45597dc982cb71f13c7c9e9206eda9ee5c98ac10b9c8","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-02-15T19:30:53Z","title_canon_sha256":"4d2009131b460650327ea6548cdc96aac2bb194779e636178043e0256e8b062f"},"schema_version":"1.0","source":{"id":"1002.2934","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1002.2934","created_at":"2026-05-18T02:09:08Z"},{"alias_kind":"arxiv_version","alias_value":"1002.2934v4","created_at":"2026-05-18T02:09:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1002.2934","created_at":"2026-05-18T02:09:08Z"},{"alias_kind":"pith_short_12","alias_value":"GZ26C3D3GB46","created_at":"2026-05-18T12:26:07Z"},{"alias_kind":"pith_short_16","alias_value":"GZ26C3D3GB46NX44","created_at":"2026-05-18T12:26:07Z"},{"alias_kind":"pith_short_8","alias_value":"GZ26C3D3","created_at":"2026-05-18T12:26:07Z"}],"graph_snapshots":[{"event_id":"sha256:502f7fe4b6001b14751f8b64621d0aa6fe8713295fc6b74c1c7de92cff8770ff","target":"graph","created_at":"2026-05-18T02:09:08Z","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 use recently acquired geomagnetic archival data to extend our long-term reconstruction of the HMF strength. The 1835-2009 HMF series is based on an updated and substantiated IDV series from 1872-onwards and on Bartels' extension, by proxy, of his u-series from 1835-1871. The new IDV series, termed IDV09, has excellent agreement (R^2 = 0.98; RMS = 0.3 nT) with the earlier IDV05 series, and also with the negative component of Love's extended (to 1905) Dst series (R^2 = 0.91). Of greatest importance to the community, in an area of research that has been contentious, comparison of the extended ","authors_text":"Edward W. Cliver, Leif Svalgaard","cross_cats":["astro-ph.EP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-02-15T19:30:53Z","title":"Heliospheric Magnetic Field 1835-2009"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1002.2934","kind":"arxiv","version":4},"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":"sha256:0024da62344e70046312917fe7d2620bae199bc8973871ab4b6c0ce5b81b6d33","target":"record","created_at":"2026-05-18T02:09:08Z","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":"6e43b23457d90c0e538e45597dc982cb71f13c7c9e9206eda9ee5c98ac10b9c8","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-02-15T19:30:53Z","title_canon_sha256":"4d2009131b460650327ea6548cdc96aac2bb194779e636178043e0256e8b062f"},"schema_version":"1.0","source":{"id":"1002.2934","kind":"arxiv","version":4}},"canonical_sha256":"3675e16c7b3079e6df9c7665d33b24d4b8143891fa3e6c219a570fa4834b2213","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3675e16c7b3079e6df9c7665d33b24d4b8143891fa3e6c219a570fa4834b2213","first_computed_at":"2026-05-18T02:09:08.134188Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:09:08.134188Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9GX2YB0/iFb2XFN3c814MOC2q+tVYLUpYNY/u6go6G6mYDyJSpnB430eZAXSevuIQ0SS5atSTeXa/zW1RSBeCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:09:08.134852Z","signed_message":"canonical_sha256_bytes"},"source_id":"1002.2934","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0024da62344e70046312917fe7d2620bae199bc8973871ab4b6c0ce5b81b6d33","sha256:502f7fe4b6001b14751f8b64621d0aa6fe8713295fc6b74c1c7de92cff8770ff"],"state_sha256":"96db4372b2aa01250c3bab97ba2cb4232b283b8b740a39acfd47c3d23bf45b59"}