Results of the spectral fitting with PPXF. a: Optical spectrum of UDG 32 extracted from the 3″-radius aperture in Fig. 1 (grey) with the best fit from PPXF overplotted in orange. Light grey vertical bands denote masked regions. b: Same as panel a, but restricted to the region around the Hα line with a separate PPXF fit. c: Posterior probability distribution of v_LOS corresponding to the wild bootstrapping of the PPXF fit shown in panel b. The orange vertical lines show the median velocity (solid) and its uncertainties (dotted).