The q parameter of this function is equal to 1.87 . In the lower part of the figure, the difference between data and q-Gaussian function is given. Note please that the difference is oscillating between plus/minus 1%. Fitted q-Gaussian seems being better than fitted Voigt function, because of a lower misfit. But we must remark that our "data" are not the original point values obtained by Thibault and coworkers. Therefore, any further specific comparison could be questionable.