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Fig. 2


a): O vi 1032 Å spectral line averaged over the whole observation. White dotted lines delineate the edges of the 182′′ portion of the UVCS slit (region A) analyzed here. b) Detrended O vi relative intensity variation over region A. c) LSP computed from the above time series. d) Wavelet power spectrum. The white grid indicates the region in which estimates of oscillation period become unreliable. e) Global wavelet power spectrum. Peaks above the 99% confidence level curve are statistically significant. f) Scale-average wavelet power in units of normalized variance.

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