Synchrotron (blue dot-dashed line) and SSC (blue dashed line) emission spectra from delayed IS for a burst with parameters L₅₂ = 10^-3, δt_obs = 1 ms, ϵ_e = 0.5, ϵ_B = 0.01, p = 2.9, z = 0.1, Γ = 300. The blue solid line is the sum of the synchrotron and SSC contributions. The black solid and dot-dot-dot-dashed lines are the AGILE and Fermi/LAT sensitivity for an integration time of 10 s, respectively (see Galli & Piro 2007). For this choice of parameters, one has a synchrotron peak around 10 keV and an SSC peak around ~1 GeV. The green solid vertical line indicates the flux level at 1 GeV, as reported by Abdo et al. (2010) for interval c. See the electronic version of this paper for colors.