Fig. 5.
Power density spectrum of Swift J1816.7–1613 obtained from combined light curves from FPMA and FPMB in the 3–79 keV energy band. The solid line represents a single power-law fit with index −1.1. Regular pulsations at ∼7 mHz and their harmonics were masked out in the fit. The dashed line is the broken power-law fit and the red diamond is the resulting break frequency at 2.4 ± 1.8 Hz.
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