Top: histogram of the frequencies of the highest peaks in the SIPs of 4923 K2 targets within the range 40–54 μHz. Bottom: histograms of peak heights within the correspondingly colored ranges indicated in the top panel. While there is a larger number maximum peaks around 47 μHz (the frequency corresponding to the 6 hr thruster fire) the amplitudes of these maximum peaks are comparable to the maximum peak heights just above and just below this frequency.