Synthetic lightcurves (absolute magnitudes; φ_bol = [0,1]) of model S computed for various filters as labelled on the right hand side. The data points are repeated to emphasise the periodicity. The corresponding data from two other pulsation cycles (φ_bol = [7,8] and [14,15]) are overplotted with dotted and dash-dotted lines. On the left hand side, the photometric magnitudes based on the hydrostatic initial model are drawn in for comparison with the same colour code as in Fig. 3.