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Fig. 5
Same as Fig. 4 but considering only the IR/Opt/UV background by Kneiske et al. (2004). Top: we assume a proton-dominated mixed composition and spectral indices β = 2.3 (uniform), 2.1 (SFR), 1.8 (FR-II). Bottom: a pure iron composition is assumed, spectral indices are β = 2.4 (uniform), 2.0 (SFR), 1.6 (FR-II).
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