TESS transits of TOI-640 b. TESS photometry phase folded to the period from Table 2 and centred on the transit. As in Fig. A.1, blue and orange points are the 30 and 2 min cadence data, respectively. The points with error bars in the box are not data, but illustrate the typical errors for the data. The data shown here have been detrended with the GP (white line in Fig. A.1). The grey curve is the best-fitting light curve.