Stars contained in the final target list (i.e., stars brigther than 18.5 in F555W) are overplotted in orange over the MUSE white-light image. The size of the circle corresponds to their inferred brightness in the V band. The stars marked with orange filled circles are used to fit the PSF (see Sect. 3.2). The spectra of the stars marked with red, blue, green, and yellow filled circles are shown in Fig. 6.