Comparison between the best fit synthetic (blue lines) and the observed disentangled (red lines) spectra of the primary component in the regions of Hγ (upper profile) and Hβ (lower profile) Balmer lines. Both profiles are shown relative to their central wavelengths; the corresponding best fit atmospheric parameters are listed in Table 4 (Run 2b). The spectra centred on Hγ are arbitrarily shifted for better visibility.