Fig. 8.
Top: NuSTAR power spectrum from an FPMA+FPMB light curve with bins of 64 s. The power law model for the red noise is shown in solid (red) line and the 95% (green) and 99.74% (blue) upper limits on the expected power are shown in dotted-dashed curves. Bottom: upper limit (3υ) on the sinusoidal fractional amplitude as a function of frequency.
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