Trend of variation of the SSC flux in the E_p − E_pF_E(E_p) plane. The black points correspond to the LAT and PCA flaring states. The red line connects the two points with different Lorentz factor γ, the blue line connects the two points with different magnetic field B. The parameters are listed in Table 7. The dotted green line shows the trend associated to δ_D variation. See text for details.