{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:AD3LP4G37EYK57ZSZSFKEFNPAO","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":"b2af839568603d777ee768c5b2ad813002d327a8ed26ea9ac11aa6c8f5c4358a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-01-27T09:53:41Z","title_canon_sha256":"4fccf25342440eb1d2c174e4336a588540143b340c055ead1784c7075b4c455a"},"schema_version":"1.0","source":{"id":"1001.4884","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1001.4884","created_at":"2026-05-18T02:09:29Z"},{"alias_kind":"arxiv_version","alias_value":"1001.4884v1","created_at":"2026-05-18T02:09:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1001.4884","created_at":"2026-05-18T02:09:29Z"},{"alias_kind":"pith_short_12","alias_value":"AD3LP4G37EYK","created_at":"2026-05-18T12:26:05Z"},{"alias_kind":"pith_short_16","alias_value":"AD3LP4G37EYK57ZS","created_at":"2026-05-18T12:26:05Z"},{"alias_kind":"pith_short_8","alias_value":"AD3LP4G3","created_at":"2026-05-18T12:26:05Z"}],"graph_snapshots":[{"event_id":"sha256:04485546bc9e9ae1ebffe7182ce56b8f07d2d79a00ee95f37b47724da1ae0fe7","target":"graph","created_at":"2026-05-18T02:09:29Z","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 STEREO mission has been providing stereoscopic view of filament eruptions in EUV. The clearest view during a filament eruption is seen in He II 304 A observations. One of the main problems visualizing filament dynamics in He II 304 A is the strong background contrast due to surface features. We present a technique that removes background features and leaves behind only the filamentary structure, as seen by STEREO-A and B. The technique uses a pair of STEREO He II 304 A images observed simultaneously. The STEREO-B image is geometrically transformed to STEREO-A view so that the background im","authors_text":"Brigitte Schmieder, Guy Artzner, Sanjay Gosain","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-01-27T09:53:41Z","title":"A Technique for Removing Background Features in SECCHI--EUVI He II 304 A Filtergrams: Application to the Filament Eruption of 22 May 2008"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1001.4884","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":"sha256:6c05a86298f1bae7b8d1463a427d86d04e91bc19fc20117f32d92723a5d389ed","target":"record","created_at":"2026-05-18T02:09:29Z","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":"b2af839568603d777ee768c5b2ad813002d327a8ed26ea9ac11aa6c8f5c4358a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-01-27T09:53:41Z","title_canon_sha256":"4fccf25342440eb1d2c174e4336a588540143b340c055ead1784c7075b4c455a"},"schema_version":"1.0","source":{"id":"1001.4884","kind":"arxiv","version":1}},"canonical_sha256":"00f6b7f0dbf930aeff32cc8aa215af03a4ea0c8d907314071c36b9c8665ca87a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"00f6b7f0dbf930aeff32cc8aa215af03a4ea0c8d907314071c36b9c8665ca87a","first_computed_at":"2026-05-18T02:09:29.351481Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:09:29.351481Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ta+LVtJb4yymWT2zPGPGdRIrA7o/9cOFzg/jDkL0NufmqMmSTI2UtAnvSHYOWigrKKADzOMf6Y6J8RONHd9kCw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:09:29.351876Z","signed_message":"canonical_sha256_bytes"},"source_id":"1001.4884","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6c05a86298f1bae7b8d1463a427d86d04e91bc19fc20117f32d92723a5d389ed","sha256:04485546bc9e9ae1ebffe7182ce56b8f07d2d79a00ee95f37b47724da1ae0fe7"],"state_sha256":"250fd6d0cc3e6df7ab2987818406bfc6f422bae45c99cc45eda7699c1f348a0c"}