Top: χ2 of the fit to Eq. (8) using the fitexy function for protons measured at Ulysses/KET at ~1.9 GV as a function of PAMELA proton measurements at varying rigidities used in Eq. (8). Middle and bottom: corresponding radial and latitudinal gradients, respectively. The PAMELA rigidity bin closest to the theoretical mean rigidity of Ulysses/KET is indicated with the vertical line.
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