GLS periodograms oſ SONG RVs (blue) and activity indicators (red) and CARMENES RVs and CRX (green) of HD 46588: (a) SONG RVs, (b) SONG RVs after removing the model with the period of 127 days, (c) SONG Hα activity indicator, (d) SONG Hα indicator after fitting a sinusoid with P = 365 days, (e) SONG window function, (f) CARMENES RVs, and (g) CARMENES CRX. The vertical green line represents the short-term activity cycle, the orange line represents the possible planetary candidate, and the black line represents the 1-yr window function. Horizontal dashed lines show the theoretical FAP levels of 10%, 1%, and 0.1% for each panel.