Fig. 4.
Left panel: γ-ray lightcurve of M 87 from 2008 to 2016 in the energy range 100 MeV–10 GeV. The binning here is six months. There are clear deviations from a constant flux level. Right panel: lightcurve in the energy band 10 GeV–300 GeV with a binsize of approximately two years. Here, statistics are not sufficiently large to establish variability. One-sigma error bars are shown.
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