Reconstructed spectral energy distribution of B0218+357 during the MJD 56851–56865 flaring episode from the Fermi/LAT data. Blue data points and band represent the leading flare emission derived here, whereas the orange ones correspond to the trailing emission component. Green data points represent the MAGIC measurements of the trailing component (Ahnen et al. 2016). An open circle data point represent the Fermi/LAT flux extracted in the 65 − 175 GeV energy range and with the Γ = −3.8 spectral slope corresponding to the MAGIC measurements.