「天馬」搭載螢光比例計数管の特性

概要

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Ten gas scintillation proportional counters (GSPC's) are on board the X-ray astronomy satellite Tenma. The energy resolution of the GSPC's is twice as good as conventional proportional counters, which enables us to perform spectroscopic study of X-ray sources with substantially better sensitivity than previous satellites. This paper describes the detailed results of pre-flight calibrations on the performance of the GSPC's. The pulse-height spectra for monochromatic X-rays were measured at several energies with the GSPC's in the laboratory before launch. By fitting them with a model function, we obtained a semi-empirical formula for the response function of the GSPC's. The efficiency as a function of energy was also calculated. The simulated response function and the effciency of the GSPC's were confirmed by observation of the Crab Nebula after the launch.
宇宙航空研究開発機構の論文