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Atmospheric Aerosol Attenuation Measurements at the Pierre Auger Observatory

机译:pierre auger的大气气溶胶衰减测量   天文台

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摘要

The Fluorescence Detector (FD) of the Pierre Auger Observatory provides anearly calorimetric measurement of the primary particle energy, since thefluorescence light produced is proportional to the energy dissipated by anExtensive Air Shower (EAS) in the atmosphere. The atmosphere therefore acts asa giant calorimeter, whose properties need to be well known during data taking.Aerosols play a key role in this scenario, since their effect on lighttransmission is highly variable even on a time scale of one hour, and thecorresponding correction to EAS energy can range from a few percent to morethan 40%. For this reason, hourly Vertical Aerosol Optical Depth (taer(h))profiles are provided for each of the four FD stations. Starting from 2004, upto now 9 years of taer(h) profiles have been produced using data from theCentral Laser Facility (CLF) and the eXtreme Laser Facility (XLF) of the PierreAuger Observatory. The two laser facilities, the techniques developed tomeasure taer(h) profiles using laser data and the results will be discussed.
机译:皮埃尔·奥格天文台的荧光检测器(FD)可以对初级粒子的能量进行早期量热测量,因为产生的荧光与大气中大量喷淋(EAS)所消耗的能量成比例。因此,大气层起着巨大的热量计的作用,在数据采集过程中它的特性需要众所周知。在这种情况下,气溶胶起着关键作用,因为即使在一个小时的时间尺度内,气溶胶对光传输的影响也是高度可变的,并且对EAS进行了相应的校正能量的范围从百分之几到超过40%。因此,为四个FD站中的每一个都提供了每小时的垂直气溶胶光学深度(taer(h))配置文件。从2004年开始,使用PierreAuger天文台的中央激光设施(CLF)和超大型激光设施(XLF)的数据,迄今为止已经产生了9年的taer(h)剖面。将讨论这两种激光设备,即使用激光数据测量taer(h)轮廓的技术以及结果。

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