Inserting the models f ^[cal] (ν) into Eq. (52) results in a unbiased flux calibration, as shown in Sect. 6.2. The figure shows the outcome for the non-SW (left panels) and SW (right panels) scenarios with (lower row) and without (upper row) baseline subtraction. It appears that the method is quite significantly affected by small errors in the fitting models of f and f^cal (compare with Sect. 6.2). Furthermore, to obtain acceptable fits, we had to choose very good prior model parameters, e.g. from a low-noise run. Nonetheless, compared to the method in Sect. 4.3 the SW do not directly convert into a sine-wave imprint in the final spectrum (compare upper right panel with Fig. 17), although relatively often higher order effects are caused when the model fits are inaccurate.