PDSs of V4743 Sgr with three component fits (red lines). Eight cases are shown because the light curve is divided into eight subsamples with a duration of 10 days. Each PDS point is displayed as a vertical line showing the uncertainty interval. The latter represents the standard error of the mean. The labels report the reduced χ², indicating the goodness of the fits, and the characteristic break frequencies f_c. The vertical dashed arrows show the frequency related to the WD spin period, which was excluded from the fitting process. The PDS point with the lowest frequency was not included in the fit because the considerably lower power is a result of detrending.