Top panel: light curve of Kepler-4 with transiting planet (at the top), its wavelet map (in the center) and global spectrum (to the right). Bottom panel: light curve of Kepler-4 with transits removed (at the top), its wavelet map (in the center) and global spectrum (to the right). Contour levels are 90%, 80%, 70%,..., 20% and 10% of the map maximum. The 6th-order Morlet wavelet was used.