Smoothed power spectrum normalised to the detection x_det as a function of frequency for several smoothing factor values (several colours; the redder and the higher the smoothing factor) for four stars (KIC 7106245, KIC 7976303, KIC 9139151, KIC 10162436). The short vertical black lines show the minimum and maximum frequency detected with a single smoothing factor with their associated posterior probability (p(x_det | H₁)) for H₁, in %. When the frequency is detected several times within 4 μHz, only the highest posterior is shown. The long vertical black lines show the minimum minimorum and maximum maximorum frequencies.