Source positions from the HST overlaid over an integrated-light image extracted from the MUSE cube. Stars with only F336W magnitudes are marked in pink, and stars with only F555W magnitudes are marked in blue. Stars that appear in both lists and are brighter than 19.5 in F555W are marked in green. They are used to determine a correlation between the two magnitudes (see Fig. 4). The two HST source catalogs need to be aligned with respect to the MUSE coordinate system by shifting them by Δx = (1.79 ± 0.36) px and Δy = (1.06 ± 0.43) px, and rotating them by θ = ( − 0.05 ± 0.10)°.