Top: star location offsets in pixel coordinates for an 8 × 8 grid, arranged by individual SCA. The black line is all stars, and the purple line is stars with 19 < m_truth < 21.5. Bottom: the same for the J129 band. This plot is formatted to reflect Roman’s detector shape and SCA arrangement. σ is the standard deviation of the purple line. We choose to show the R062 and J129 bands to illustrate this discussion point (Figures 4 and 10) because they have the largest and smallest differences, respectively, in their x- and y-coordinate recovery precision (Table 2).