{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:D6NR7RN2GLJDHHM6BPLWSQRZ2Y","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":"d7c7a40fe83f7cf811e6e39a201629c19ed88494a880ba7ad990d48432a39aff","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-02-06T00:18:12Z","title_canon_sha256":"880e0d818dee78e0264bcd3072f460e9c32b01938b5d8b59caad093ae26ec99a"},"schema_version":"1.0","source":{"id":"1302.1234","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1302.1234","created_at":"2026-05-18T03:34:24Z"},{"alias_kind":"arxiv_version","alias_value":"1302.1234v1","created_at":"2026-05-18T03:34:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.1234","created_at":"2026-05-18T03:34:24Z"},{"alias_kind":"pith_short_12","alias_value":"D6NR7RN2GLJD","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_16","alias_value":"D6NR7RN2GLJDHHM6","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_8","alias_value":"D6NR7RN2","created_at":"2026-05-18T12:27:40Z"}],"graph_snapshots":[{"event_id":"sha256:037314a3d0831206e166ea72fe543dbcbb09825ba3e3e4e322544c35ca7ab022","target":"graph","created_at":"2026-05-18T03:34:24Z","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 study chromospheric oscillations including umbral flashes and running penumbral waves in a sunspot of active region (AR) using scanning spectroscopy in H-alpha and Ca II 8542A, with the Fast Imaging Solar Spectrograph (FISS) at the 1.6 meter New Solar Telescope at Big Bear Solar Observatory. A bisector method is applied to spectral observations to construct chromospheric Doppler velocity maps. Temporal sequence analysis of these shows enhanced high-frequency oscillations inside the sunspot umbra in both lines. Their peak frequency gradually decreases outward from the umbra. The oscillation ","authors_text":"Donguk Song, Heesu Yang, Hyungmin Park, Jongchul Chae, Kyuhyoun Cho, Ram Ajor Maurya","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-02-06T00:18:12Z","title":"Chromospheric Sunspot Oscillations in H-alpha and Ca II 8542A"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.1234","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":"sha256:5ac94aca7b640c01fa9bab10db277c2598019cd9818584b70587a4d8641ea7be","target":"record","created_at":"2026-05-18T03:34:24Z","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":"d7c7a40fe83f7cf811e6e39a201629c19ed88494a880ba7ad990d48432a39aff","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-02-06T00:18:12Z","title_canon_sha256":"880e0d818dee78e0264bcd3072f460e9c32b01938b5d8b59caad093ae26ec99a"},"schema_version":"1.0","source":{"id":"1302.1234","kind":"arxiv","version":1}},"canonical_sha256":"1f9b1fc5ba32d2339d9e0bd7694239d629620dfcfb5384013e206ee4ea3695a2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1f9b1fc5ba32d2339d9e0bd7694239d629620dfcfb5384013e206ee4ea3695a2","first_computed_at":"2026-05-18T03:34:24.810748Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:34:24.810748Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rKI4IC3Ihlm4O0M2ekSs6TaRrShu8H8Ihg+w3QbdXOtJb296j4RiKZa/6Bo2arQ0WqGD9RPk1T0sm4tyWgTfAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:34:24.811193Z","signed_message":"canonical_sha256_bytes"},"source_id":"1302.1234","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5ac94aca7b640c01fa9bab10db277c2598019cd9818584b70587a4d8641ea7be","sha256:037314a3d0831206e166ea72fe543dbcbb09825ba3e3e4e322544c35ca7ab022"],"state_sha256":"da3689a41dddee9a84b70a17b1586842f641fbb5722934b078029c3d2fa2c70e"}