Sensitivity of orbiting JEM-EUSO to large-scale cosmic-ray anisotropies

Cosmic Ray Anisotropy Workshop 2013

Denton, Peter B.^1 ; Anchordoqui, Luis A.^2 ; Berlind, Andreas A.^1 ; Richardson, Matthew^1 ; Weiler, Thomas J^1

Department of Physics and Astronomy, Vanderbilt University, Nashville, TN 37235, United States^1

Physics Department, University of Wisconsin-Milwaukee, Milwaukee, WI 53201, United States^2

关键词: All-sky;    Cosmic ray anisotropy;    Field of views;    Ground based observatories;    JEM-EUSO;    Space-based observations;    Spherical harmonics;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/531/1/012004/pdf
DOI  :  10.1088/1742-6596/531/1/012004

来源: IOP

【 摘 要 】

The two main advantages of space-based observation of extreme-energy (1019eV) cosmic-rays (EECRs) over ground-based observatories are the increased field of view, and the allsky coverage with nearly uniform systematics of an orbiting observatory. The former guarantees increased statistics, whereas the latter enables a partitioning of the sky into spherical harmonics. We have begun an investigation, using the spherical harmonic technique, of the reach of JEM- EUSO into potential anisotropies in the extreme-energy cosmic-ray sky-map. The technique is explained here, and simulations are presented. The discovery of anisotropies would help to identify the long-sought origin of EECRs.