Physics
Scientific paper
Oct 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996nimpa.380..414l&link_type=abstract
Nuclear Instruments and Methods in Physics Research Section A, Volume 380, Issue 1-2, p. 414-418.
Physics
9
Scientific paper
The IMAGER gamma-ray telescope on board INTEGRAL features a coded aperture and a two-layer detector. The first of these layers, ISGRI, is a 16 384 pixel CdTe gamma-camera which will operate in the 20 keV-1 MeV energy range. The spectral performances of ISGRI at energies greater than 50 keV are obtained using a software charge-loss correction based on pulse rise-time measurements. At high energy, the study of the Compton interactions between the two IMAGER layers should ensure a good background rejection. This device will provide unprecedented performances in this energy range: a spatial resolution of 4 mm, a spectral resolution better than 7% at 122 keV and a broad band sensitivity at 3σ of about 10-6 cm-2 s-1 keV-1 at 100 keV for a 105 s observation. Galactic X-ray binary sources, supernovae and active galactic nuclei will be prime targets for ISGRI.
Blondel Corinne
de Antoni Philippe
Laurent Pascal
Lebrun François
Leray Jean-Paul
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