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Fig. 5


Vertical dashed line indicates the 2009B flare. Top panel: monthly flux light curve of 3C 345 in γ rays measured by Fermi LAT. The bars indicate the TS level of each bin, shown on the right y-axis. The horizontal dashed line indicates the TS threshold of 25. Bottom panel: monthly photon index light curve. Only photon indexes associated with points with TS > 25 are shown.

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