Fig. 4
Differential energy spectra of HESS J1731−347 (filled circles) and HESS J1729−345 (open circles). The normalization for the second source has been divided by 10 for graphical purposes. Events were binned to reach a significance of at least 2σ. The best fit power-law models along with the residuals for HESS J1731−347 are also shown. The grey bands correspond to the range of the power-law fit, taking into account statistical errors.
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