{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2014:A4B5KW3S3PX5VLSFUUAKACBB4C","short_pith_number":"pith:A4B5KW3S","schema_version":"1.0","canonical_sha256":"0703d55b72dbefdaae45a500a00821e0aa51bf30edee51b05cb1208976e61986","source":{"kind":"arxiv","id":"1412.6100","version":1},"attestation_state":"computed","paper":{"title":"Stable Umbral Chromospheric Structures","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"D. Kiselman, E. Scullion, F. P. Keenan, M. Mathioudakis, P. T. Gallagher, V. M. J. Henriques","submitted_at":"2014-12-18T21:00:09Z","abstract_excerpt":"Aims. To understand the morphology of the chromosphere in sunspot umbra. We investigate if the horizontal structures observed in the spectral core of the Ca II H line are ephemeral visuals caused by the shock dynamics of more stable structures, and examine their relationship with observables in the H-alpha line. Methods. Filtergrams in the core of the Ca II H and H-alpha lines as observed with the Swedish 1-m Solar Telescope are employed. We utilise a technique that creates composite images and tracks the flash propagation horizontally. Results. We find 0\"15 wide horizontal structures, in all "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1412.6100","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-12-18T21:00:09Z","cross_cats_sorted":[],"title_canon_sha256":"e84ef75c9fcab464372ed803dc71051551442c7deff34bda1ac1ce8921575c25","abstract_canon_sha256":"d1eb33efc09d46c1d9c2eb3a4ecd24cf8e8c8afab7fc2a145ee7b89b75fac9da"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:27:31.706713Z","signature_b64":"z2oDsBv2ilpU3VYj/1FGSfu+lzMeRk4smun3Dqcuyqg8anHEbd/g5CaakrM1KhBr4JwiQjweOTfJ/3WbziK3Aw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0703d55b72dbefdaae45a500a00821e0aa51bf30edee51b05cb1208976e61986","last_reissued_at":"2026-05-18T02:27:31.705968Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:27:31.705968Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Stable Umbral Chromospheric Structures","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"D. Kiselman, E. Scullion, F. P. Keenan, M. Mathioudakis, P. T. Gallagher, V. M. J. Henriques","submitted_at":"2014-12-18T21:00:09Z","abstract_excerpt":"Aims. To understand the morphology of the chromosphere in sunspot umbra. We investigate if the horizontal structures observed in the spectral core of the Ca II H line are ephemeral visuals caused by the shock dynamics of more stable structures, and examine their relationship with observables in the H-alpha line. Methods. Filtergrams in the core of the Ca II H and H-alpha lines as observed with the Swedish 1-m Solar Telescope are employed. We utilise a technique that creates composite images and tracks the flash propagation horizontally. Results. We find 0\"15 wide horizontal structures, in all "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.6100","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1412.6100","created_at":"2026-05-18T02:27:31.706065+00:00"},{"alias_kind":"arxiv_version","alias_value":"1412.6100v1","created_at":"2026-05-18T02:27:31.706065+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.6100","created_at":"2026-05-18T02:27:31.706065+00:00"},{"alias_kind":"pith_short_12","alias_value":"A4B5KW3S3PX5","created_at":"2026-05-18T12:28:19.803747+00:00"},{"alias_kind":"pith_short_16","alias_value":"A4B5KW3S3PX5VLSF","created_at":"2026-05-18T12:28:19.803747+00:00"},{"alias_kind":"pith_short_8","alias_value":"A4B5KW3S","created_at":"2026-05-18T12:28:19.803747+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/A4B5KW3S3PX5VLSFUUAKACBB4C","json":"https://pith.science/pith/A4B5KW3S3PX5VLSFUUAKACBB4C.json","graph_json":"https://pith.science/api/pith-number/A4B5KW3S3PX5VLSFUUAKACBB4C/graph.json","events_json":"https://pith.science/api/pith-number/A4B5KW3S3PX5VLSFUUAKACBB4C/events.json","paper":"https://pith.science/paper/A4B5KW3S"},"agent_actions":{"view_html":"https://pith.science/pith/A4B5KW3S3PX5VLSFUUAKACBB4C","download_json":"https://pith.science/pith/A4B5KW3S3PX5VLSFUUAKACBB4C.json","view_paper":"https://pith.science/paper/A4B5KW3S","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1412.6100&json=true","fetch_graph":"https://pith.science/api/pith-number/A4B5KW3S3PX5VLSFUUAKACBB4C/graph.json","fetch_events":"https://pith.science/api/pith-number/A4B5KW3S3PX5VLSFUUAKACBB4C/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/A4B5KW3S3PX5VLSFUUAKACBB4C/action/timestamp_anchor","attest_storage":"https://pith.science/pith/A4B5KW3S3PX5VLSFUUAKACBB4C/action/storage_attestation","attest_author":"https://pith.science/pith/A4B5KW3S3PX5VLSFUUAKACBB4C/action/author_attestation","sign_citation":"https://pith.science/pith/A4B5KW3S3PX5VLSFUUAKACBB4C/action/citation_signature","submit_replication":"https://pith.science/pith/A4B5KW3S3PX5VLSFUUAKACBB4C/action/replication_record"}},"created_at":"2026-05-18T02:27:31.706065+00:00","updated_at":"2026-05-18T02:27:31.706065+00:00"}