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Fig. 2


Top panel: continuum-normalized SARG spectrum of KIC 8429280 (solid line) in the Ca ii H & K region together with the inactive stellar template (dotted red line) broadened at the vsini of the target and Doppler-shifted according to the RV difference. Bottom panels: the difference spectrum. Hϵ emission, already apparent in the observed spectrum, is clearly emphasized in the residuals.

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