期刊
ASTRONOMY & ASTROPHYSICS
卷 411, 期 1, 页码 L141-L148出版社
EDP SCIENCES S A
DOI: 10.1051/0004-6361:20031367
关键词
space telescope; cadmium telluride detectors; gamma-ray astronomy; calibration; INTEGRAL; IBIS
For the first time in the history of high energy astronomy, a large CdTe gamma-ray camera is operating in space. ISGRI is the low-energy camera of the IBIS telescope on board the INTEGRAL satellite. This paper details its design and its in-flight behavior and performances. Having a sensitive area of 2621 cm(2) with a spatial resolution of 4.6 mm, a low threshold around 12 keV and an energy resolution of similar to8% at 60 keV, ISGRI shows absolutely no signs of degradation after 9 months in orbit. All aspects of its in-flight behavior and scientific performance are fully nominal, and in particular the observed background level confirms the expected sensitivity of 1 milliCrab for a 10(6) s observation.
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