Variation in the selected line fluxes during the 2007–10 active phase. Top panel shows the B-band LC to compare variation in the continuum and to visualize better the time-interval of the eclipse (the light shadow band). The width of the dark and mild shadow band corresponds to the linear size of the eclipsed object and the He ^+  +  zone, respectively. Dotted lines limit the radius of the cool giant. Fluxes are dereddened and their values are given in Table 5.