Total spectrum of PSR B1259–63/LS 2883’s 2021 periastron passage. The spectrum was produced from all data taken with H.E.S.S. during the 2021 periastron passage observations of PSR B1259–63/LS 2883, using an unfixed energy range. The spectrum has been fit with a power-law model. For details on the properties of the spectra displayed see Table 2. The red band indicates the 68% c.i. of the statistical error for the fitted model.