Photometric calibration for the F090W (top), F200W (middle), and F444W (bottom) bands. Matched sources are shown as faint red dots. The subset of point-like sources (eccentricity < 0.01) used for calibration is indicated by red circles. Blue circles with error bars represent bin-averaged values computed via the bin-scatter method. The lower inset zooms into the region used for regression, delimited by dashed lines. Horizontal dashed lines indicate the linear fits used to compute the final magnitude offsets.