Fermi Gamma-ray Space Telescope

CALET Gamma-ray Burst Monitor on the ISS

Kazutaka Yamaoka
Kazutaka Yamaoka (Nagoya U.), Atsumasa Yoshida, Takanori Sakamoto, Ichiro Takahashi, Yuta Kawakubo, Ryota Inoue, Shunsuke Terasawa, Kazumasa Senuma (Aoyama Gakuin U.), Satoshi Nakahira, Hiroshi Tomida, Shiro Ueno (JAXA), Masaki Mori (Ritsumeikan U.), Shoji Torii (Waseda U.), Michael L. Cherry (Louisiana State U.), Sergio Ricciarini(IFAC-CNR) for the CALET collaboration

Abstract:

The CALET Gamma-ray Burst Monitor (CGBM) is the secondary scientific instrument of the CALET mission on the International Space Station (ISS), which is scheduled for launch by H-IIB/HTV in JFY 2014. A primary goal of CGBM is to observe a wide class of GRBs by its broadband energy coverage from 7 keV to 20 MeV. Combining the data of the primary instrument Calorimeter (CAL), the energy coverage can be extended up to GeV - TeV range. The CGBM consists of two kinds of scintillators: two LaBr3(Ce) (7 keV - 1 MeV) and one BGO (100 keV - 20 MeV) each read by a single photomultiplier. The LaBr3(Ce) crystal, which is used in space for the first time for celestial gamma-ray observations, enables observations over a broad energy range from low energy X-ray to gamma rays.The pre-flight calibration of the CGBM proto-flight model (PFM) was carried out in January 2014, and the CALET is now under construction for launch. In this presentation, we report on the current status and expected performance of CGBM for GRB observations.