Fig. 7.
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Phased data and periodograms for X Sgr. Left panel: data for X Sgr phased with the dominant pulsation period. Consecutive rows present data for RV, FWHM, BIS, contrast, and EW. The BJD of each observation is color-coded. Right panel: frequency spectrum after pre-whitening with the dominant pulsation period and its harmonics. The position of the pulsation frequency and its harmonics are marked with red dotted lines. The additional signals are marked with arrows and labels (see also Table 3). The horizontal cyan line corresponds to three times the average noise level.
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