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Fig. 5.

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Photon index vs. 0.3 − 10 keV flux before and during the first 2013 γ-ray outburst. Observations span from 2011 May 19 (MJD 55700) to 2013 July 27 (MJD 56500), with numbers indicating the chronological sequence. The movement of data points between zone 1 and zone 2 highlights the evolution of the X-ray spectral state during jet activity.

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