Fig. 13.
Fit to the region around Fe Iλ2719 Å line at z = 0.452. From top to bottom, the black line corresponds to the data obtained with UVES in 2001, 2009, and 2017 and ESPRESSO in 2018. The fit profiles are presented in the same manner as in Fig. 12. The horizontal dashed line and grey stripe show 1 − Cf and its uncertainty, respectively. The constrained value of Cf for each spectrum is given in the bottom-left of each panel.
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