Combined LUCI1+LUCI2 spectrum of PSO J1011−01 around the CIV and CIII] emission lines. The spectrum (black solid line) is binned at 6.5 Å, that is, three times the native resolution. The dashed blue line shows the noise of the final spectrum derived from the data reduction. The solid light green line is the best-fit model of the continuum plus the CIV and CIII] emission lines. The shaded grey area indicates wavelengths heavily affected by telluric absorption that were not considered during the fit.