Comparison of UHE Composition Measurements by Fly's Eye, HiRes-prototype/MIA and Stereo HiRes Experiments

Sokolsky, P.; Belz, J.; Collaboration, the HiRes

Comparison of UHE Composition Measurements by Fly's Eye, HiRes-prototype/MIA and Stereo HiRes Experiments

Authors

Sokolsky, P.

Belz, J.

Collaboration, the HiRes

Description

We compare the elongation rate and Xmax distributions for three air-fluorescence experiments: Stereo Fly's Eye, HiRes/MIA, and HiRes. A shift of 13 gm/cm^3 of the stereo Fly's Eye data, well within the quoted systematic errors, brings the elongation rates and the Xmax distributions of all three experiments into reasonable agreement. We explore the implications of this combined dataset ranging from 10^17 eV to near 10^20 eV.
4 pages, 3 figures, Submitted to the 29th International Cosmic Ray Conference, Pune, India