Top: HD 25015 RV measurements as a function of Julian Date obtained with CORALIE-98 (blue), CORALIE-07 (green) and CORALIE-14 (purple). The fitted single-planet Keplerian model is represented as a black curve. Second figure: RV residuals of HD 25015. Third figure: periodogram of the residuals for HD 25015 after the signal has been removed showing no significant signals. The three black lines represent the 10, 1 and 0.1% FAPs in ascending order. Bottom: periodogram of H_α before detrending. The three black lines represent the 10, 1 and 0.1% FAPs in ascending order, showing a significant peak above the 10% FAP at 370.26 days.