Spectra of early and late jets in the late dissipation model, considered in this work. Syn and SSC come from synchrotron and SSC emission by relativistic electrons accelerated at the external shock of the early jet. LP represents the assumed seed photon spectrum from the late jet, which is responsible for shallow-decay X-ray emission, and EIC is the EIC emission by Compton scatterings of X-ray photons by electrons accelerated at the external shock. The observation time is set to T = 10 ^3.6 s and the source redshift is taken as z = 0.3. Here, relevant parameters for the late jet are L ^b _LP| _{T′ a} = 10 ⁴⁸ erg s ⁻¹, T′ _a = 10 ³ s, E′ ^b = 0.1 keV, α _fl = 0.2, and α _st = 1.5. Parameters for the standard afterglow component are the same as those used in the caption of Figure 3. Thick curves represent cases where the EBL attenuation is taken into account, while thin ones do not. The attenuation by pair creation in the source is also considered.