  An exoplanet transiting in front of the disk of its parent star may hide a
dark starspot causing a detectable change in the light curve, that allows to
infer physical characteristics of the spot such as size and intensity. We have
analysed the Kepler Space Telescope observations of the star Kepler-71 in order
to search for variabilities in 28 transit light curves. Kepler-71 is a star
with 0.923Ms and 0.816Rs orbited by the hot Jupiter planet Kepler-71b with
radius of 1.0452RJ. The physical parameters of the starspots are determined by
fitting the data with a model that simulates planetary transits and enables the
inclusion of spots on the stellar surface with different sizes, intensities,
and positions. The results show that Kepler-71 is a very active star, with
several spot detections, with a mean value of 6 spots per transit with size
0.6Rp and 0.5 Ic, as a function of stellar intensity at disk center (maximum
value).
