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Fig. 1

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Approximate synchrotron and IC spectra calculated for different values of γm, from almost unity up to γb. This test demonstrates how the spectral index in the MeV − GeV range depends on the γm value. The dashed line shows the difference between the estimated (α1 = 0.5) and calculated (α ≃ 0.65) spectral slope below the peak.

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