2003/10/03 by R. Terrier, Regis Terrier, F. Lebrun +13 · 2 citations
Engineering · Physics and Astronomy · #Advanced Semiconductor Detectors and Materials #CCD and CMOS Imaging Sensors #Radiation Detection and Scintillator Technologies #astro-ph
paper · pdf · doi:10.1051/0004-6361:20031391
published as Astron.Astrophys.411:L167-L172,2003
arxiv created 2003/10/03 · openalex publication_date 2003/10/28 · arxiv updated 2011/05/23 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/31
ISGRI, the IBIS low energy camera (15 keV-1 MeV) on board INTEGRAL, is the first large CdTe gamma-ray imager in orbit. We present here an overview of the ISGRI in-flight calibrations performed during the first months after launch. We discuss the stability of the camera as well as the CdTe pixels response under cosmic radiation. The energy calibrations were done using lead and tungsten fluorescence lines and the calibration unit. Thermal effects and charge correction algorithm are discussed, and the resulting energy resolution is presented. The ISGRI background spatial and spectral non-uniformity is also described, and some image correction results are presented.