Top panel: BLS spectrum of the filtered light curve LRc01_E1_0331, containing simulated transits by a super-Earth with orbital period P = 9.8 days (see bottom panel of Fig. 1). The highest peak corresponds to the inserted transit signal, which is thus easily detected. Its harmonics are also clearly visible. Bottom panel: phase-folded light curve at the period and epoch found by the BLS (Sect. 3.1.g).