Fig. 1.
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Energy and arrival time of photons with detected energy ≥10 GeV from Fermi-LAT GRBs from burst onset to one day thereafter. Red symbols represent photons that arrived within and after 2 × T90, shown in ⬧ and ⋆, respectively. Photon energy and arrival time in the source frame are also shown (in green) if measured redshift are available. Dashed arrows connect the same photons in the source frame and the observer’s frame.
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