Spectrum from γ² Velorum. The red line corresponds to the best-fit PL spectral shape and has an uncertainty of 1σ. The 95% confidence level upper limits are used for energy bins with less than 2σ detection. Data from Pshirkov (2016) are shown in grey. Emission from Reitberger et al. (2017) at apastron is shown in blue. The spectrum was obtained assuming Γ = 2.0 per each energy bin by default with fermipy (Γ = 2.39 provides fully compatible results).