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Fig. 9


The 19.1 ks XMM-Newton power spectrum (blue histogram) versus simulated 10 000 powers (red histogram with error bars). The power spectrum of the simulated light curves are power law shaped with a slope of –0.9. 1σ error bars are shown. An excess in the observed power near the log(frequency) = –3 may suggest a presence of the QPO feature.

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