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Fig. A.2.

Fig. A.2. Refer to the following caption and surrounding text.

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Light curves and Lomb-Scargle periodogram for the star PM J05408-3323 observed by TESS. The first panel shows the light curve for sectors 0 and 1 combined. The second panel shows the light curve for sectors 2 and 3 combined. The third panel displays the Lomb-Scargle periodogram computed from all sectors combined, with an estimation of the period uncertainty indicated by the yellow shaded area. The red peak and the green peak highlight additional periodicities discussed in Sect. 5.1.

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