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Fig. A.1.

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Visualization of the parameter degeneracy with the example of the TESS light curve of EPIC 245919787/TIC 434101713. Top: Models for one dark spot with a size of R spot R star = 0.43 $ \frac{R_{\mathrm{spot}}}{R_{\mathrm{star}}}=0.43 $ located at longitude = 0° and latitude = 0° for different values of the stellar inclination. Middle: Models for one dark spot with a size of R spot R star = 0.43 $ \frac{R_{\mathrm{spot}}}{R_{\mathrm{star}}}=0.43 $ located at longitude = 0° and stellar inclination=90° for different values of the latitude. Bottom: Models for one dark spot located at longitude=0° and latitude=0° with a stellar inclination of 90° for different values of the spot size.

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