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Fig. 7


NuSTAR power density spectra of V 0332+53 of the last 2015 observation (black crosses) and the first observation of the 2016outburst (red crosses). The apparent excess at high frequencies is clearly seen in the spectrum of the 2016 observation, suggesting a decrease in the effective magnetospheric radius between the outbursts. The power spectra were built with the powspec utility from HEASoft using the Leahy normalization (Leahy et al. 1983) with white noise subtraction.

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