In , a detailed discussion is given about the determination of the Lorentzian contribution in the fitted Voigt profile, to evaluate the collisional width. The researchers "fixed the Gaussian width in the Voigt profile to that corresponding to the convolution of the expected Doppler width for every line and temperature, and a Gauss function of 0.0026 cm -1 FWHM [full width at half maximum] to account for the apparatus function. Then, the collisional width was obtained as the Lorentz width resulting from the fit" . In our Figures the wings are not Lorentzian, because the fitted q-Gaussian has qparameter equal to 1.85. This value of qparameter tells us that we are quite close to a Lorentzian wing, so the collisional effect is the most relevant one.