Top panels: overplotted Hαλ6563 spectra with n the number of spectra, which is the same for each panel in Figs. A.2−A.8. Vertical dashed lines are drawn at ± vsini. Lower panels: temporal variance spectra expressed as the ratio of the observed to the expected standard deviation, σ_obs/σ_exp. The lower horizontal long-dashed line is drawn at unity. The upper horizontal short-dashed line is the 1% significance level. From left to right: a) acquired at BOAO in 2007, spanning 27 days. b) acquired at the Mercator telescope in 2012, spanning 6 days. c) acquired at the Mercator telescope in 2013 spanning 6 days. The spectra in the panels have been rebinned to a velocity grid giving the same S/N of 560 per bin.