Fit of the integrated R100 spectrum of CR7-A extracted from the aperture shown in Fig. 1 and focused on the wavelength range between 1100–1800 Å rest-frame. Data before and after continuum subtraction are in grey and solid black, respectively. Single Gaussians used to fit the Lyα emission line are in dashed blue and purple. Best-fit continuum and emission line models are in green and red, respectively. (For details of the spectrum fit see Sect. 3.6.)