Typical example of the outcome of the light curve fitting for a non-magnetic model. Upper panel: a comparison between the input light curve based on the Claret-4 law (solid black line), and the fit with a power-2 law (dashed red line). The curves are shown in terms of the light blocked by the planet as a function of its geometrical position, x_pian, in units of the stellar radius. Both curves are hardly distinguishable on the scale of the plot. At the given geometry a maximum of μ = 0.8 is reached during transit. Lower panel: input (solid black line) and fitted (dashed red line) LD laws. In both panels, the dashed blue and yellow lines mark locations corresponding to μ = 1/3 and 2/3. For further details, see the text.