12-20 July 2017
BEXCO
Asia/Seoul timezone
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Contribution

BEXCO - Room F(201/202/203/204)

[CRD052] Reference maps for anisotropy searches with AMS-02

Speakers

  • Miguel Angel VELASCO

Primary authors

Co-authors

Description

The search for anisotropies in cosmic ray arrival directions requires knowledge of the expected measurement in case of isotropic cosmic ray arrival directions. This expected measurement can then be used as a reference to search for deviations from the isotropic case in data. Two types of anisotropies are commonly cited in the literature: (i) relative anisotropies where the arrival directions of other cosmic ray species serve as a reference and (ii) absolute anisotropies where the isotropic hypothesis is derived from the same cosmic ray species. Here we discuss the advantages and shortcomings of different techniques to construct such reference maps from data. We introduce a novel method to determine the isotropic reference maps used for the measurement of absolute anisotropies with AMS-02, which can be applied to detectors with any given field of view and any particle species. The performance of this reference map in comparison to relative anisotropies will be presented in several physics motivated coordinate systems.