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Fig. 4


Sum of power spectra of our four /XMM/EPIC pn observations over 0.8–10 keV of γ Cas. The binning in time over 10 s prevents the spectrum from being followed out to its white noise component. Regression lines are drawn with slopes noted through two frequency ranges. A break in the slopes is noted by a square symbol at a frequency of 0.005 Hz.

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