Statistics of MUSE sources without HST counterpart. Left panel: comparison of the redshift distributions of MUSE sources with (brown color) and without (blue color) HST counterparts. Right panel: estimated AB aperture magnitude for MUSE sources without HST counterparts. The histogram is colored according to the HST filters. Successful photometric measurements (S/N > 3) are displayed in dark colors, while measurements with S/N < 3 are displayed with light colors. In the latter case the reported magnitude is the measured noise RMS standard deviation.