Models of the Hα (upper panel) and Hβ line (lower panel), where the upper plot gives the line light-curve and the bottom plot the continuum light-curve. In the plots the full line denotes the model of the expected mean light-curve, while dots represent the observed data. The blue band shows the expected spread of the light-curves around the mean consistent with the data. The x-axis gives the modified Julian Date (MJD), the y-axis the normalized line/continuum fluxes.