SED with three equally spaced logarithmic energy bins, extracted in the 1–10 GeV energy range. The blue data points represent detections above a 3σ c.l., while the red arrow represents an upper limit. The dashed red line in the bottom panel corresponds to TS = 9, meaning a 3σ detection level. The source is well-modelled with a power law with photon index Γ = 2.5, here represented by the dashed black line. The two solid black lines represent the 1σ bounds with respect to the model.