Adopted IC EUV spectrum for our clusters, which is the spectrum of model 11 in Sarazin (1999). Here ﹩L_{\nu }﹩ is the luminosity per unit frequency ν. This model has a total IC luminosity of ﹩L_{\mathrm{IC}\,}=2.86\times 10^{44}﹩ ergs s﹩^{-1}﹩. The normalization of the spectrum of each model cluster is scaled to give the correct value of ﹩L_{\mathrm{IC}\,}﹩ for that cluster.