{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:X6YYQBZGLEOKUWGPI4MWFDMFCN","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":"02b54d7eeeea26148d073e6fe9c3b7554a611db99c07ac2460055734353fbe6f","cross_cats_sorted":["cs.CV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-04-10T19:03:26Z","title_canon_sha256":"e836b7424502bdd248b92b9577838184005266aa7d1d913a914f2d2b633c5c8d"},"schema_version":"1.0","source":{"id":"1504.02762","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.02762","created_at":"2026-05-18T01:19:19Z"},{"alias_kind":"arxiv_version","alias_value":"1504.02762v2","created_at":"2026-05-18T01:19:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.02762","created_at":"2026-05-18T01:19:19Z"},{"alias_kind":"pith_short_12","alias_value":"X6YYQBZGLEOK","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_16","alias_value":"X6YYQBZGLEOKUWGP","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_8","alias_value":"X6YYQBZG","created_at":"2026-05-18T12:29:50Z"}],"graph_snapshots":[{"event_id":"sha256:6c52aa9bb8a9bc64336e15319b88c8b2273552cedde9cbed7cd1838d0a513e4f","target":"graph","created_at":"2026-05-18T01:19:19Z","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":"Separating active regions that are quiet from potentially eruptive ones is a key issue in Space Weather applications. Traditional classification schemes such as Mount Wilson and McIntosh have been effective in relating an active region large scale magnetic configuration to its ability to produce eruptive events. However, their qualitative nature prevents systematic studies of an active region's evolution for example. We introduce a new clustering of active regions that is based on the local geometry observed in Line of Sight magnetogram and continuum images. We use a reduced-dimension represen","authors_text":"Alfred O. Hero III, Fraser Watson, Jimmy J. Li, Kevin R. Moon, Ruben de Visscher, Veronique Delouille","cross_cats":["cs.CV"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-04-10T19:03:26Z","title":"Image patch analysis of sunspots and active regions. II. Clustering via matrix factorization"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.02762","kind":"arxiv","version":2},"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:d6141261cd1219fdbaa1ffdecb08a368f5223d4f6f1891751ae7dc5a95b136b7","target":"record","created_at":"2026-05-18T01:19:19Z","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":"02b54d7eeeea26148d073e6fe9c3b7554a611db99c07ac2460055734353fbe6f","cross_cats_sorted":["cs.CV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-04-10T19:03:26Z","title_canon_sha256":"e836b7424502bdd248b92b9577838184005266aa7d1d913a914f2d2b633c5c8d"},"schema_version":"1.0","source":{"id":"1504.02762","kind":"arxiv","version":2}},"canonical_sha256":"bfb1880726591caa58cf4719628d85134b580064888baa04fe3e9003390f3fcd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bfb1880726591caa58cf4719628d85134b580064888baa04fe3e9003390f3fcd","first_computed_at":"2026-05-18T01:19:19.236662Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:19:19.236662Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"y0v73c5HpM4stscAbBCMWfGihU+1PJWtB7w3rQKygrFjyxAkIfKL6it0K7A6J8aDSvki1WPWeEX5/4K4K436Aw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:19:19.237091Z","signed_message":"canonical_sha256_bytes"},"source_id":"1504.02762","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d6141261cd1219fdbaa1ffdecb08a368f5223d4f6f1891751ae7dc5a95b136b7","sha256:6c52aa9bb8a9bc64336e15319b88c8b2273552cedde9cbed7cd1838d0a513e4f"],"state_sha256":"7f4e7860b99a0ab76e934c35bb173f8ea06c1cbc6fc2e105930e91f9e45aadc4"}