Left panel: nonthermal energy spectra expected for uncollimated post-merger jets from an SMBH merger located at z = 1. The solid and dashed lines represent the synchrotron and SSC components. The dashed–dotted lines show the sensitivity curves for current and future detectors. Right panel: multiwavelength light curves. The yellow and blue dashed vertical lines illustrate, respectively, the characteristic times, e.g., Tssa, of 100 GHz and 5 GHz emissions. The used parameters are ﹩\dot{m}=0.5﹩, MBH = 106 M⊙, ﹩{\tilde{\eta }}_{w}={10}^{-1.5}﹩, ηj = 1, θj = 10−0.5, s = 2.0, ζe = 0.4, ϵe = 0.1, and ϵB = 0.01.