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Fig. 3


Left column: time series (1998-07-03 00:47–12:00 UT).Right column: the corresponding normalised power spectra, a 30-min running average is removed from the intensity time series beforehand, the harmonics of the orbital periods are marked with the vertical dash-dot-dot lines, corresponding to the periods 96, 48, 32, 24   min. From top to bottom row: TRACE CCD temperature variation (°C), the average intensity (DN) of the ROI, and off ROI.

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