Fig. 2.
Observed multiwavelength lightcurves. (a) H.E.S.S. lightcurve derived above an energy threshold of 200 GeV in night-wise time bins with array configuration as indicated. Arrows mark upper limits (99% confidence level). (b) Fermi-LAT lightcurve integrated above 100 MeV in 3 h bins. Gray arrows mark upper limits (95% confidence level). (c) HE γ-ray photon index measured with Fermi-LAT in 3 h bins. (d) Swift-XRT lightcurve integrated between 2 and 10 keV for individual pointings. (e) Optical R band lightcurve from ATOM and SMARTS for individual pointings. (f) Spectral index between the J and B band using SMARTS observations for individual pointings. In all panels, only statistical error bars are shown.
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