γ-ray spectrum of the Cygnus Loop extracted with the UV template and modeled emission in the RPCR scenario (Eq. (12)). Solid lines show the total contribution of Bremsstrahlung radiation, IC, and π⁰ decay using preexisting CRs from Phan et al. (2018). On the left (right), we show different cutoff (break) energy values at p_br c = 4.3 GeV (p_max c = 22 GeV). The actual cutoff and break energies in the radiative zone are s^1∕3p_maxc and s^1∕3p_brc. The filling factor f is fixed to f = 0.013.