کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1770807 | 1523383 | 2012 | 5 صفحه PDF | دانلود رایگان |
Several ground-based extensive air shower (EAS) experiments such as As γ and Milagro have observed that CRs show large scale anisotropy in the TeV energy region with an amplitude of about 0.1%. The amplitude of anisotropy is so weak that we have to deal carefully with potential errors introduced by analysis methods. In this paper, we discuss a method based on χ2χ2-iteration algorithm for wide sky survey analysis in the use of equi-zenith angle method with large sample data. The results show that χ2χ2-iteration method leads to accurate and reasonable results in the case of large scale anisotropy in data samples.
► Anisotropy given by equi-zenith angle method is far from being accurate.
► χ2χ2 Iteration technique is found to give accurate results with expectation.
► Azimuth modification will not introduce “false” anisotropy phenomenon.
Journal: Astroparticle Physics - Volumes 39–40, December 2012, Pages 144–148