Fig. 1
Variations of pEW of emission lines at all dates of observations. The letter “A” marks the absolute minimum of the pEW of Hα (Sect. 4.4), letters “B”, “C” and “D” label the flares occasionally observed at BJD = 7465.8823, 3202.5647, and 5647.7300, respectively (Sect. 4.4) and letters “E” and “F” label the pEW of two Hα flares observed across BJD = 6417 (Sect. 4.2). Grey line shows the approximation of the set of minimum values of pEW of Hɛ by a sinusoid; see Sect. 4.1.
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