Fig. 4
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Lines of Ca II H (top right) and K (top left), as well as Hβ (bottom left) and Hα (bottom right) for two HARPS spectra with HJD = 3833 (black dashed line) and HJD = 3834 (red line). During a flare we can see a broadening and intensification of the Balmer lines which allowed us to discriminate spectra contaminated by flare-type events.
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