Phase diagrams for fluxes (left) and RVs (right) of individual components of the Hα line profile; the CE (top), A (middle) and broad WE (bottom). Different orbital cycles are denoted by different colours (see the keys). The orange line represents the RV-curve of the RG, . The arrow in the top-left panel marks the brightening, possibly caused by the refraction effect (Sect. 4.1). The right-middle panel shows the shift of the A component (dashed line) relative to , with the grey belt illustrating average uncertainty in measuring RVs (Sect. 3.4.1). The grey line in the bottom-right panel represents binned RVs of the broad WE component with the bin width 0.1 of the orbital phase. Data are in Table 2.