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Fig. 16.


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Dipole amplitude and source composition. Top and central panels: energy evolution of the amplitude of the dipole for the four source models A, B, C and C, compared to that estimated by Auger in four energy bins: 4 ≤ E < 8 EeV, 8 ≤ E < 16 EeV, 16 ≤ E < 32 EeV, and E ≥ 32 EeV (the values are shown at the median energy of the bins). The markers show the mean values average over 300 datasets while the shaded areas shows the intervals which contain 90% of the datasets. The scenarios considered are based on the baseline volume-limited catalog, a 1 nG EGMF and the JF12+Planck GMF with λc = 500 pc. Bottom panel: histograms of the logarithmic index γ of the energy evolution of the dipole amplitude, extracted from a power law fit of this evolution for each of the 300 datasets (see text). The solid lines show Gaussian fits of the histograms.

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