Relative proton flux for three rigidity bins (top three columns on the left). The lower-left panel gives the resulting normalized power according to Eq. (4). The dashed lines mark the respective corrected confidence levels and the dotted lines the uncorrected ones. Right: Color coding gives the normalized power for protons for all rigidity bins. Again, the dashed and dotted line mark the height at which the normalized power becomes significant for the corrected and uncorrected confidence level, respectively.