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Fig. 5.

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Variation in ΓPL with segment number (left panel). The green shaded band is the 1-σ error region and the black lines show the transition from one observation to the other. The right panel shows the ΓPL variation with total flux. The red solid line is the weighted linear least-squares fit to the data. Both panels show a significant change in ΓPL from 2.2 to 3.0 in about 83 days.

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