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Fig. 7.

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Scatter plot of the PL spectral index Γγ and flux Fγ in the HE γ-ray data. In the top (bottom) panel, Γγ and Fγ derive from the Fermi-LAT lightcurve with 30-day bins (daily bins) shown in Figure 1 (Figure 3). The dotted lines mark the fits using Eq. (6).

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