Fig. 2.

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Fractional variability, Fvar, for the light curves displayed in Fig. 1. Nightly bins are used for MAGIC, three-day bins for Fermi-LAT, and for all other wavebands the single observations are without further binning. The filled orange to violet markers depict Fvar when data over the full campaign are considered, and the open turquoise markers only include measurements during the IXPE time window. For Fermi-LAT, Fvar cannot be computed during the IXPE window due to a variability level below the statistical uncertainties, leading to a negative value in the square root of the numerator of Fvar (see Vaughan et al. 2003).
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