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Fig. 2


Multiwavelength light curves of PKS 1510−089 for the period between MJD 54 910 to MJD 54 951 in terms of integral fluxes in the respective bands along with the 1σ error bars. Panel a) shows the VHE light curve (one day bins) from H.E.S.S. The horizontal line is obtained by fitting a constant-source model to the data. Panel b) displays the HE light curve derived from Fermi-LAT data. The black open circles show the integrated fluxes in one day bins, whereas a finer binning of 4 h is shown in magenta. The solid line is the average level, and the dashed line is the threshold level used for deriving a flare spectrum during the high state around MJD 54 917. In panel c) the R-band optical fluxes measured with ATOM are shown.

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