CALET GBM Observations of Gamma-ray Bursts and Gravitational Wave Sources
CALET GBM Observations of Gamma-ray Bursts and Gravitational Wave Sources
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DOI：
10.22323/1.301.0614
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发表时间：
2017-09
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影响因子：
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通讯作者：
K. Yamaoka
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作者：
K. Yamaoka
CALET伽马射线爆发监测器（CGBM）是国际空间站（ISS）上量热电子望远镜（CALET）使命的二级科学仪器。主要仪器量热计（CAL）能够探测GeV-TeV范围内的伽马射线暴（GRB），CGBM被附加以补充keV-MeV范围内的CAL伽马射线观测。CGBM由两台硬X射线探测器（HXM）和一台软γ射线监测器（SGM）组成，分别采用LaBr 3（Ce）和BGO两种不同的探测器。CGBM覆盖7 keV - 20 MeV的宽带能量范围，具有宽视场（FOV）。自2015年8月19日发射以来，CGBM已经在国际空间站成功运行了约1.5年，每年探测到约50个伽玛暴（其中短伽玛暴约占20%）。CALET还与LIGO/Virgo合作达成了谅解备忘录（MOU），我们正在寻找引力波（GW）源的硬X射线和伽马射线对应物。在本文中，我们将报告CGBM在轨运行，性能和观测的伽玛暴和GW源。
The CALET Gamma-ray Burst Monitor (CGBM) is secondary scientific instrument of the Calorimetric Electron Telescope (CALET) mission on the International Space Station (ISS). The primary instrument Calorimeter (CAL) is capable of detecting gamma-ray bursts (GRBs) in the GeV-TeV range, and the CGBM was attached to complement CAL gamma-ray observations in the keV-MeV range. The CGBM consists of 2 Hard X-ray Monitors (HXMs) and one Soft Gamma-ray Monitor (SGM), utilizing different scintillators LaBr$_3$(Ce) and BGO respectively. The CGBM covers a broadband energy range of 7 keV - 20 MeV with a wide field of view (FOV). Since the launch on August 19, 2015, the CGBM has been sucessfully operated on the ISS for about 1.5 years, and detecting about 50 GRBs (roughly 20\% short GRBs among them) per year as expected from pre-launch estimation. The CALET also concluded memolandam of understanding (MOU) with LIGO/Virgo collaboration, and we are searching for hard X-ray and gamma-ray counterparts for gravitational wave (GW) sources. In this paper, we will report on CGBM in-orbit operation, performance and observations of GRBs and GW sources.