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Measured and Predicted UHECR Spectra

Measured and Predicted UHECR Spectra. Upper Curve: E -2.35 Source Spectrum with source distribution that follows the z distribution of star formation rate, requires 10x energy input of lower curves and exhibits ‘pile-up effect’

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Measured and Predicted UHECR Spectra

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  1. Measured and Predicted UHECR Spectra Upper Curve:E-2.35 Source Spectrum with source distribution that follows the z distribution of star formation rate, requires 10x energy input of lower curves and exhibits ‘pile-up effect’ Middle Curve:E-2.75 Source Spectrum with uniform source distribution Lower Curve:E-2.75 Source Spectrum with source distribution that follows the z distribution of star formation rate Scully and Stecker, Astropart Phys 16 (in press)

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