Distributions of the empirical Monte Carlo analysis for the 12 Å passband. Top row: results for the transmission spectrum method. Bottom row: results for the light-curve method. The columns correspond to the three different observation nights (nights 1 to 3, from left to right). In-in, out-out and in-out scenarios are shown in blue, red, and green. Distributions are shown as continuous lines, the Gaussian fit to the distribution as dotted lines, and vertical lines are the average values. Results on the measurements and errors caused by these distributions are summarized in Fig. 6, where we compare it to the nominal values.