Result of the light curve test for the a/R_star parameter. The ordinate is the S/N-ratio defined by Eq. (34). The y-axis is the difference between the simulated and the retrieved scaled semi-major axis in percentage. Black dots denote the solutions where the stellar radius value was obtained to be with 3% accuracy relative to the injected stellar radius, while gray points represent the cases where we had obtained them with 3–6% accuracy.