In-flight calibration sources simulations for the IBIS telescope

Astronomy and Astrophysics – Astrophysics

Scientific paper

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X- And Gamma-Ray Telescopes And Instrumentation, X-Ray Binaries, Background Radiations, Spaceborne And Space Research Instruments, Apparatus, And Components

Scientific paper

The early performance verification phase of the INTEGRAL satellite foresees basically several different observations as part of commissioning of the on-board instruments. The Cygnus region, two empty fields and the Crab have been selected as targets. These observations are necessary in order to obtain imaging performances for point sources and for crowded fields, spectral cross-calibration between the on-board instruments, a background variation study, absolute flux and timing calibration. We report simulation results for the IBIS coded mask telescope of planned calibrations concerning Crab and Cygnus X-1, performed in both staring and dithering observing modes. A Monte Carlo code including a full geometrical and physical model of the instrument has been used. .

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