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arXiv 1303.5576astro-ph.IMastro-ph.HE
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用皮埃尔俄歇天文台中央Laser设备测量气溶胶衰减的技术

Techniques for Measuring Aerosol Attenuation using the Central Laser Facility at the Pierre Auger Observatory

Pierre Auger Collaboration

摘要:

位于阿根廷马拉圭的皮埃尔·俄歇天文台旨在研究能量超过1018 eV的超高能宇宙射线的性质。这是一个混合设施,采用荧光检测器进行大量的空气簇射能量的近似量热测量。为了从FD获得可靠的量热信息,需要在数据采集期间持续监测观测站的大气条件。特别是,由于气溶胶的光衰减是一个重要的大气校正。气溶胶浓度变化很大,因此需要每小时评估气溶胶衰减。我们使用来自中央激光设施的光,该激光设施位于观测站中心附近,其光学特征与FD检测到的最高能量阵雨相当。本文介绍了两个程序开发的CLF激光发射的荧光气溶胶衰减反演。两种方法之间的交叉检查表明,两种分析的结果是相容的,并且不确定性是很好理解的。皮埃尔·俄歇天文台目前使用这两个程序提供的气溶胶衰减测量结果来重建空气簇射数据。

英文摘要:

The Pierre Auger Observatory in Malargüe, Argentina, is designed to study the properties of ultra-high energy cosmic rays with energies above 1018 eV. It is a hybrid facility that employs a Fluorescence Detector to perform nearly calorimetric measurements of Extensive Air Shower energies. To obtain reliable calorimetric information from the FD, the atmospheric conditions at the observatory need to be continuously monitored during data acquisition. In particular, light attenuation due to aerosols is an important atmospheric correction. The aerosol concentration is highly variable, so that the aerosol attenuation needs to be evaluated hourly. We use light from the Central Laser Facility, located near the center of the observatory site, having an optical signature comparable to that of the highest energy showers detected by the FD. This paper presents two procedures developed to retrieve the aerosol attenuation of fluorescence light from CLF laser shots. Cross checks between the two methods demonstrate that results from both analyses are compatible, and that the uncertainties are well understood. The measurements of the aerosol attenuation provided by the two procedures are currently used at the Pierre Auger Observatory to reconstruct air shower data.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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