Lepton DF fit parameters. Lepton DFs (viewed in the star’s frame) were least‐square fitted (in log space) to a function of the form ﹩f( p_{\parallel }) \propto \mathrm{exp}\,[ -K( \mathrm{ln}\,p_{\parallel }/ p_{0}) ^{2}] ﹩. The best‐fit values of these two parameters are shown: ﹩p_{0}﹩ is roughly the mean parallel momentum of the DF, while K is an inverse width. Actual fits are shown as points, while the lines show interpolations used for the composite DFs of § 4. Two values of μ are shown; the larger angle was considered only for lower energy seed photons.