标题： 皮埃尔·奥格观测站的大规模各向异性估计方法与覆盖范围 显示英文标题

标题： Coverage and large scale anisotropies estimation methods for the Pierre Auger Observatory

摘要： 当搜索超高能宇宙线到达方向的各向异性时，必须估计在完美各向同性的情况下，每个天空方向预期的事件数。本文介绍了为Auger观测站开发的一种新方法，该方法基于从数据本身获得的天顶角分布的平滑估计（在存在大尺度各向异性模式的情况下基本不变）。我们还研究了几种检测宇宙射线到达方向分布中大尺度各向异性的方法的灵敏度：Rayleigh分析、偶极子拟合和角功率谱估计。 显示英文摘要

摘要： When searching for anisotropies in the arrival directions of Ultra High Energy Cosmic Rays, one must estimate the number of events expected in each direction of the sky in the case of a perfect isotropy. We present in this article a new method, developed for the Auger Observatory, based on a smooth estimate of the zenith angle distribution obtained from the data itself (which is essentially unchanged in the case of the presence of a large scale anisotropy pattern). We also study the sensitivity of several methods to detect large-scale anisotropies in the cosmic ray arrival direction distribution : Rayleigh analysis, dipole fitting and angular power spectrum estimation.