Fig. 8.

Left: comparison of the asymptotic α and the local photon index α10 at 10 keV between the Band and ISSM functions. The gray dashed line denotes equality. The dashed-dotted horizontal and vertical lines indicate the upper limit (−2/3) of the low-energy spectral index for synchrotron emission in the slow cooling regime. Right: distributions of the α and α10 parameters of the Band and ISSM functions.
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