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Fig. 3

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Top of each panel: observed, continuum-normalized SARG spectra of KIC 8429280 (solid line) in the Hβ, Hα, and Ca ii IRT regions together with the non-active stellar template (dotted red line). Bottom of each panel: difference between observed and template spectra. The residual Hα profile is plotted shifted downwards by 0.2 for the sake of clarity. The hatched areas represent the excess emissions that have been integrated to get the net equivalent widths.

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