Eight targeted quasar pairs. Each panel shows the spectra for the two AGNs extracted either from the final MUSE data cubes in an aperture of 3″or available from SDSS. Vertical dotted lines indicate the location of key emission lines at the SDSS redshift of the brighter quasar. The spectrum of quasar 1.1 is scaled down by a factor of 10. The mean noise per channel in the MUSE data at the respective wavelength of Lyα is $0.08·{10}^{-17}\mathrm{erg}{\mathrm{s}}^{-1}{\mathrm{cm}}^{-2}{\mathrm{\AA }}^{-1}$.