Left: spectral energy distribution of HESS J1427−608 with those of the associated Fermi-LAT sources. The Fermi-LAT upper limits are calculated with a confidence level of 95%. Right: broadband nonthermal spectrum of HESS J1427−608 in a leptonic scenario. The solid black line corresponds to the model with E_min = 1 GeV, E_cut = 12.3 TeV, p = 1.9, B = 10.1 μG, and W_e = 4.9 × 10⁴⁷ × (d/8 kpc)² erg. The model with E_min = 25 GeV, E_cut = 19.1 TeV, p = 2.5, B = 9.9 μG, and W_e = 2.2 × 10⁴⁸ × (d/8 kpc)² erg is represented by the dashed black line.