H.E.S.S. non-detections of the z=1.388 blazar PKS 2023-07 during flares, together with Fermi-LAT spectra, imply an intrinsic cutoff below about 35-128 GeV or absorption in the broad line region.
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Observations of blazar PKS 2023-07 in flaring state with HESS and Fermi-LAT in 2016-2017 and constraints on an intrinsic cut-off
H.E.S.S. non-detections of the z=1.388 blazar PKS 2023-07 during flares, together with Fermi-LAT spectra, imply an intrinsic cutoff below about 35-128 GeV or absorption in the broad line region.