Temporal analysis of a sample G-band light curve. (a) An MBP’s de-trended G-band light curve at 541, 411 (MBP #10; see Table 1). (b) Wavelet power transform along with locations at which detected power is at or above the 99% confidence level contained within the contours. (c) Summation of the wavelet power transform over time (full line) and the fast Fourier power spectrum (crosses) over time, plotted as a function of period. Both methods show strong detection near 540 seconds. (d) Global wavelet (solid line) and Fourier (dashed-dotted line) 99% significance levels.