Three examples of the 200-day running FT (top panels) and FT of the complete simulated light curves (bottom panels). The amplitudes and frequencies of the simulated signals were set at 10 μHz and 30 ppm. Green lines in the bottom panel represent 4σ detection thresholds. A frequency search box of 1.0 μHz width, used to find FT signals (see text) is shown in the top right panel as the shaded white and transparent rectangle.