Flares in γ-ray produced by a late reaccelerating episode occurring at distances z₁ = 1 pc (blue line) and z₂ = 10 pc (red line). The other parameters have the values: G, cm, erg s⁻¹, , u_exp = 0.1 c, γ_min = 1, γ_max = 10⁵, p = 2, δ = 10 and the profiles of the magnetic field strength and electrons luminosity are decreasing as R⁻¹. The flaring parameters (see Eq. (21)) are w′ = 100 t_cross, 0, and α = 100. The flare which occurs earlier (blue line) is dominated by strong radiation losses, and it appears more symmetrical, contrary to the later one (red line), which is dominated by the adiabatic losses and electron escape.