Fig. 4.
Distributions of the fitted O VII equivalent widths in eV for each input O VII equivalent width from GRB afterglow spectra with F ≥ 5 × 10−11 erg cm−2 s−1. The input equivalent width is represented by the red dashed line and the median equivalent width of the distribution is shown by the blue dashed line. The blue shaded area is the 1σ interval of the distribution.
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