On-orbit operation and gamma-ray burst observations with the CALET Gamma-ray Burst Monitor

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https://calet.jp/wp-content/uploads/2019/04/yk_CGBM_APS_April-1.pdf

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http://hdl.handle.net/11603/25371

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UMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II)
UMBC Faculty Collection

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https://orcid.org/0000-0003-2916-6955

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2019-04-15

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presentations (communicative events)
conference papers and proceedings
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This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
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Abstract

The CALorimetric Electron Telescope (CALET) includes a Gamma-ray Burst Monitor (CGBM) to enhance the gamma-ray observations of the calorimeter, the main CALET detector. CGBM consists of two kinds of scintillation detectors, the Hard X-ray Monitor (HXM) consisting of LaBr3(Ce) and the Soft Gamma-ray Monitor (SGM) consisting of BGO. Together, the two detectors cover the X-ray/gamma-ray energy range 7 keV - 20 MeV. CGBM has observed gamma-ray bursts (GRBs) since October 2015. So far, CGBM has detected ~140 GRBs. The fraction of long and short GRBs are ~90% and ~10%. In this paper, we describe the current operational status of CGBM, the GRB analysis results including temporal and spectral analysis, and the search for gravitational wave counterparts.