An evaluation of the exposure in nadir observation of the JEM-EUSO mission
An evaluation of the exposure in nadir observation of the JEM-EUSO mission
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DOI：
10.1016/j.astropartphys.2013.01.008
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发表时间：
2013-04-01
影响因子：
3.5
通讯作者：
Marchi, A. Zuccaro
中科院分区：
文献类型：
--
作者：
Adams, J. H., Jr.;Ahmad, S.;Marchi, A. Zuccaro
我们评估了与JEM-EUSO，极端宇宙空间天文台，在国际空间站的日本实验舱的最低点观测期间的曝光。JEM-EUSO的设计目的是从太空探索极端能量宇宙的使命，它将监测地球的夜间大气层，记录由超高能宇宙射线引发的大范围空气簇射产生的紫外线轨迹。在目前的工作中，我们讨论了空间观测的特殊性，我们计算的年度曝光在天底观测。这些结果是基于对预期触发孔径和观测占空比的研究，以及对云和不同类型背景光的影响的调查。我们表明，每年的曝光量是约一个数量级高于目前运行的地面观测站。(C)2013爱思唯尔有限公司版权所有。
We evaluate the exposure during nadir observations with JEM-EUSO, the Extreme Universe Space Observatory, on-board the Japanese Experiment Module of the International Space Station. Designed as a mission to explore the extreme energy Universe from space, JEM-EUSO will monitor the Earth's nighttime atmosphere to record the ultraviolet light from tracks generated by extensive air showers initiated by ultra-high energy cosmic rays. In the present work, we discuss the particularities of space-based observation and we compute the annual exposure in nadir observation. The results are based on studies of the expected trigger aperture and observational duty cycle, as well as, on the investigations of the effects of clouds and different types of background light. We show that the annual exposure is about one order of magnitude higher than those of the presently operating ground-based observatories. (C) 2013 Elsevier B.V. All rights reserved.