FIG. 7.

Centroid residuals after geometric refinement for reference simulated dataset. (a) Centroid residuals on the detector binned into 64 equal panels. The colormap denotes the residual error in the refined rotation angle, $\Delta \psi$. Wavelengths are relaxed to match spot centroid location, leading to near-zero radial residuals. (b) Centroid residuals on the detector binned into 64 equal panels. Similar to panel (a), but with spot centroids repredicted using the monochromatic nominal beam wavelength prior to calculating residuals. Wavelengths are not relaxed here, leading to high radial residuals illustrating the difficulties of applying monochromatic indexing routines to these data. Plots were produced using a modified version of cctbx.xfel.detector_residuals.