Fig. 2
GRB 090926A time-averaged spectral energy distribution as measured by the Fermi/LAT, using Pass 7 data above 100 MeV (dot-dashed butterfly) and Pass 8 data above 30 MeV (filled butterfly) or 100 MeV (dotted and dashed butterflies). Each spectrum is represented by a 68% confidence level contour derived from the errors on the parameters of the fitted power-law function.
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