Friday, May 3, 2013

1305.0523 (M. Zimbres et al.)

Using spherical wavelets to search for magnetically-induced alignment in the arrival directions of ultra-high energy cosmic rays    [PDF]

M. Zimbres, R. Alves Batista, E. Kemp
Due to the action of the intervening cosmic magnetic fields, ultra-high energy cosmic rays (UHECRs) can be deflected in such a way to create clustered energy-ordered filamentary structures in the arrival direction of these particles, the so-called multiplets. In this work we propose a new method based on the spherical wavelet transform to identify multiplets in sky maps containing arrival directions of UHECRs. The method is illustrated in scenarios with a multiplet embedded in isotropic backgrounds with different number of events. The efficiency of the algorithm is assessed through the calculation of Type I and II errors.
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