Spectra of the systems observed with MUSE (target name and redshift are reported in the panels). They have been extracted over the square apertures marked on the white light images in Figure 1 (with the same color-coding). Vertical dotted blue lines mark the position of the main expected emission lines. For J0052−3045, emission lines are plotted in light blue and violet as the redshift for the two AGN is not the same. The star in J0007−0053 has been multiplied by ten to optimize the visualization. The gap around 6000 Å is due to the New Generation Controllers (NGC) deployed in adaptive optics.