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Fig. 13.

image

Observed HE and VHE γ-ray spectra of PKS 1510–089 during the flare night, JD 2457539. The Fermi-LAT butterflies are integrated over the precise H.E.S.S. (red) and MAGIC (green) observation windows and are plotted until the highest detected photon energy. The VHE γ-ray spectra are corrected for EBL absorption using the model of Franceschini et al. (2008), with the H.E.S.S. spectrum in red and the MAGIC spectrum in green. The grey data points are the low-state spectra from MAGIC Collaboration (2018a). For this spectrum, HE points above 1 GeV are omitted due to potential bias (for details, see MAGIC Collaboration 2018a).

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