Smoothed power spectrum normalised to the detection x_det as a function of frequency for several smoothing factors (several colours; the redder the colour the higher the smoothing factor, which varies from 2 to 70 frequency bins). The short vertical black lines show the minimum and maximum frequency detected with a single smoothing factor and their associated posterior probabilities (p(x_det | H₁)) for H₁, in %. When the frequency is detected several times to within 4 μHz, only the highest posterior is shown. The long vertical black lines show the minimum minimorum and maximum maximorum frequencies.