RVs of GJ 1148 and the two-planet fit obtained when using HIRES (open black squares), CARMENES (yellow dots), and SPIRou (purple dots) data. From top to bottom: full signal as a function of time, and the signal phase folded at the period of planet b and planet c. The red dots show the binned data on the phase-folded plots. The RadVel two-planet model is shown as a blue line. The bottom plot shows the periodogram of the residuals, exhibiting an additional peak at the 85 days period. The horizontal lines show the 10, 1, and 0.1% FAP levels.