Value of ΔΓ as a function of the redshift z. Overlaid are the predicted breaks obtained from the Bayesian fit (simple line), as well as the 95% CL lower limits (hashed area). Left is the linear approximation (Eq. (1)) and right is the scaled model of Fra08 (Eq. (2)). For both models, none of the sources are significantly lower than the 95% CL lower limit. The symbols are descibed in Fig. 1.