Fig. 12.
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Energy threshold and redshift for the H.E.S.S. sample analysed in this work, shown as grey points. The curves indicate the energy at which, at a given redshift, the EBL absorption coefficient reaches a value of 0.99 (pink curve), 0.9 (turquoise curve), and 0.5 (orange curve). The two VHE-detected GRBs by H.E.S.S. are indicated with a star (GRB 180720B) and blue cross (GRB 190829A).
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