Differential energy spectrum of H.E.S.S. J1708−443, extracted from Region C (see Table 2). The solid line shows the result of a power-law fit. The error bars denote 1-σ statistical errors. The bottom panel shows the residuals of the power-law fit. Events with energies between 0.6 and 28 TeV were used in the determination of the spectrum, and the minimum significance per bin is 1σ.