Residual variations for the observing season 2008. a) V-band light curve, b) Hα-core flux, c) relative Ca ii H&K emission-line flux, and d) He i D3 absorption line depth. The left column shows the data phased with the rotational period of 58.32 d, the right column with the orbital period of 147.89 d, both with respect to a time of periastron passage. Units are as in Fig. 8. We note the sharp decline in Ca ii H&K flux around periastron in 2008. For better visibility we plot the phases twice.