Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2011-07-12
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
4 pages (2 columns), 6 figures. In Proceedings of the 31st International Cosmic Ray Conference, Lodz, Poland, 7-15 July 2009
Scientific paper
We propose a new way to detect individual bright Ultra-High Energy Cosmic Ray (UHECR) sources above background if the Galactic Magnetic Field (GMF) gives the main contribution to UHECR deflections. This method can be directly applied to maps given by experiments. It consists in starting from at least two high energy events above 6x10^19 eV, and looking at lower energy tails. We test the efficiency of the method and investigate its dependence on different parameters. In case of detection, the source position and the local GMF deflection power are reconstructed. Both reconstructions are strongly affected by the turbulent GMF. With the parameters adopted in this study, for 68 % of reconstructed sources, the angular position is less than one degree from the real one. For typical turbulent field strengths of 4 \mu G at the Earth position and 1.5 kpc extension in the halo, one can reconstruct the deflection power with 25 % precision in 68 % of cases.
Giacinti G.
Semikoz Dmitri V.
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