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Fig. A.1

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Photometry analysis for HD 103891. Row 1, Left: Input time series of ASAS data. Row 1, Right: GLS periodogram of ASAS data. The periodogram has a peak at ~ 400 days. Row 2, Right: Input HIPPARCOS data. Row 2, Right: GLS periodogram of HIPPARCOS data shows a non significant peak at ~ 2.2 days. Row 3, Left: Input TESS data for sector 9. Row 3, Right: GLS periodogram of TESS flux values shows a peak at ~ 2.9 days. Row 4, Left: TESS data for sector 36. Row 4, Right: GLS periodogram of TESS flux values shows a peak at ~ 8.9 days.

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