在国际空间站上使用CALET进行1 GeV以上的低能伽马射线观测

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021) Pub Date : 2021-08-04 DOI:10.22323/1.395.0604

N. Cannady

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引用次数: 5

摘要

量热电子望远镜(CALET)于2015年8月发射升空，安装在国际空间站(ISS)日本实验舱暴露设施上。除了GeV - TeV能量的宇宙射线电子和高达PeV能量的宇宙射线强子的主要科学目标外，CALET对1 GeV至10 TeV的伽马射线敏感，但受统计限制。获得低于10 GeV的能量是通过专用的低能伽马(LE- )触发器实现的，该触发器仅在低地磁纬度活动。在这项工作中，我们回顾了用该触发器收集的伽马射线事件的分析，包括CALET视场中宇宙射线与国际空间站结构相互作用产生的次级光子背景的缓解，对持久星系和河外源的观测，以及对静止太阳发射的探测。

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Low-energy gamma-ray observations above 1 GeV with CALET on the International Space Station

The CALorimetric Electron Telescope (CALET) was launched in August 2015 and installed on the International Space Station (ISS) Japanese Experiment Module Exposed Facility. Alongside the primary science targets of GeV—TeV energy cosmic-ray electrons and cosmic-ray hadrons up to PeV energies, CALET is sensitive to gamma rays from 1 GeV up to 10 TeV, limited by statistics. Access to energies below 10 GeV is enabled by a dedicated low-energy gamma (LE-𝛾 ) trigger which is active only at low geomagnetic latitudes. In this work we review the analysis of gamma-ray events collected with this trigger including the mitigation of a secondary photon background from cosmic-ray interactions with ISS structures in the CALET ﬁeld-of-view, the observation of persistent galactic and extragalactic sources, and the detection of emission from the quiescent Sun.

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Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)

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