Full-resolution MUSE 1D spectrum of sources (top to bottom) 49, 50, 51, 52, and 53, with wavelength on the horizontal axis and the flux on the vertical axis. The spectra are zoomed in on the Lyαline, which is indicated by the vertical black line. For source 49, we determined the redshift based on other UV-emission lines, while for the other sources we used Lyαto determine z. For sources 49, 52, and 53 the different images of the same source are stacked to optimise the signal-to-noise ratio. The fluctuations and non-zero continuum around Lyαin object 53 are the result of locally increased noise.