Best fit of the 1 eccentric planet + GP-SHO model (which includes instrumental offsets) in the left panel for GJ 674 (top) and the residuals (bottom). The model and RV data are separated by a small difference in color shade and the uncertainty of the model fit indicated by the more transparent region. The colors indicate the pre-fiber change (blue) and post-fiber change (orange) HARPS instrument seasons. The model parameters can be found in Table 4. The gray box marks the extent of the zoomed sub-panel. Zoom into the region of densest observations marked by the gray box in the left panel (middle). Phase-folded, activity-subtracted, and instrumental offset-corrected RV (right).