{"paper":{"title":"Simultaneous H$\\alpha$, Na~{\\sc i} D$_{1}$, D$_{2}$, and He~{\\sc i} D$_{3}$ observations of a flare on the RS CVn system UX Ari","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"D. Montes, J. Sanz-Forcada, M.J. Fern\\'andez-Figueroa, R. Lorente","submitted_at":"1996-04-29T17:13:12Z","abstract_excerpt":"We present simultaneous H$\\alpha$, Na~{\\sc i} D$_{1}$, D$_{2}$, and He~{\\sc i} D$_{3}$ spectroscopic observations on the RS CVn system UX Ari. We have found a dramatic increase in the excess H$\\alpha$ emission equivalent width by a factor of 2 in an interval of 1 day that indicates the beginning of a strong flare in this system. The presence of the He~{\\sc i} D$_{3}$ in emission in coincidence with the enhancement of the H$\\alpha$ emission confirms the detection of a flare. The application of the spectral subtraction technique reveals that the core of the Na~{\\sc i} D$_{1}$ and D$_{2}$ lines a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9604170","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"}