Spectral energy distribution of gamma rays observed within different angles in the direction of the source with EBL absorbtion (thick lines) and without (dashed lines) indicated for maximum angles. is the apparent angular size of the region with radius 0.5 Mpc from the distance with redshift z. The angles are specified in units of the corresponding and differ from each other by a factor of 3. The maximum angles for every redshift, the total power of injection of protons L and the beaming angle θ_beam are indicated. The IGMF is fixed at the strength of B = 1 nG, while the coherence length is taken as λ = 1/(1 + z) Mpc.