Next: Veto Shield
Up: The Subsystems
IBIS contains an on-board collimated radioactive
This allows regular calibration of PICsIT at both the 511keV line
(calibration to better than 1% in 4 hours) and 1275 keV (1% in 8 hours).
ISGRI can also use the 511keV line, albeit at lower efficiency.
Any energy deposits from untagged photons will have an impact of
% on the overall continuum sensitivity between 100 keV and 2 MeV.