Observed high-energy SED of 1ES 0229+200. Black symbols are LAT measurements from the 3FGL catalogue. Orange triangles indicate the HESS spectrum (Aharonian et al. 2007) while the gray triangles indicate fluxes that are obtained after correction for the absorption with EBL. The dotted line indicates the assumed intrinsic spectrum. The three panels report the received γ-ray spectrum for different assumed intrinsic spectra (from top to bottom: a simple power law with energy index α = 0.4; a broken power law with high-energy index α₂ = 2 and break energy E_b = 10 TeV; an exponential cut-off with e-folding energy E_cut = 15 TeV) and values of E_LIV (color code as in Fig. 2). The HAWC and CTA sensitivity curves (as in Fig. 3) are displayed for an exposure time of five years and 50 h, respectively.