Fig. The best fit (blue) onto the curve (red) given by . Upper part: an asymmetric q-Gaussian is used (the values of the q-parameters are given in the figure, note that one of them is larger than 2). The misfit is proposed in the lower part of the plot. The fitting calculation is obtained by minimizing the sum of the squares of the deviations (sum from n=1 to n=260). The value of this sum is 3.5 x 10 -4 . The fit seems being slightly better than that proposed in the Fig. . Lower part: an asymmetric q-Gaussian and a q-Gaussian are used for the fit. Parameters q are given in the panel on the right. The sum of the squares of deviations is equal to 5.4 x 10 -5 .