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Fig. 1
Fit residuals of the featureless spectral shapes, as a function of energy. a) Residuals of the whole sample of spectra to the power-law fit. b) Residuals of the whole sample to the log-parabola fit. c) Example residuals to the log-parabola fit for the subset PKS 2155−304 (5).
This figure is made of several images, please see below:
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