Four-spot light-curve fit. Left: phased CoRoT light curve (the white line is the SML fit and the small dots are the CoRoT data from Fig. 1). Right: spot model in Mercator representation (from left to right identified as spots 1, 2, 3, and 4, see Table 4). We note that the phases of the four light-curve minima do not coincide with the central longitudes of the four spots but that the recovered spot longitudes agree with a time of periastron passage at phase 004 (≈14°) as a zero point plus an increment of ≈90° per spot. We also note that the spot solution is mathematically not unique.