Contribution of various components of ISRFs to the IC model of the gamma-ray emission. The data points correspond to the emission at the base of the FBs in the rectangle b ∈ (−2°, 2°), ℓ ∈ (−10°, 0°) (middle panel in Fig. 11). The spectrum of CR electrons is modeled as a power-law function with an exponential cutoff at 1 PeV. We separate the SL and IR contributions to the ISRF by formally splitting the ISRF at 0.1 eV.