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Fig. 7.
Luminosity (top panel) and integrated luminosity (i.e. radiated energy; bottom panel) in the OF as a function of time, for different energy bands. The majority of the observed emission occurs between 
s and 
s, in the range 0.1 − 30 GeV. The γ-γ absorption has a dramatic effect on photon energies above 30 GeV.
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