1 × 1 arcmin cutouts around DF07, DFX1, and PUDG-R27 from Hubble Space Telescope F814W data. The cyan rectangle indicates the positioning of the KCWI slicer. The orange ellipses indicate the regions used for the extraction of spectra and correspond to the three spectra below: the central annulus (cent), the middle aperture (mid), and the outer annulus (out). For each spectrum, the coloured line corresponds to the pPXF fit. Shaded regions show enforced masking, and dashed vertical lines mark some relevant lines: Hβ, Fe5015, Mg_b, and Fe5270 (from left to right).