Distributions of the false-alarm probability 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 (night 1 to 3, from left to right). Distributions are shown as continuous lines, the Gaussian fit as dotted lines, and the nominal values from which the false-alarm probabilities are inferred as vertical lines.