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Origin of the in-orbit instrumental background of the Hard X-ray Imager onboard Hitomi

Enoto, Teruaki; Yamaoka, Kazutaka; Fukazawa, Yasushi +43 more

Understanding and reducing in-orbit instrumental backgrounds are essential to achieving high sensitivity in hard x-ray astronomical observations. The observational data of the Hard X-ray Imager (HXI) onboard the Hitomi satellite provide useful information on the background components due to its multilayer configuration with different atomic number…