The IBIS data handling system

Astronomy and Astrophysics – Astronomy

Scientific paper

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Observation And Data Reduction Techniques, Computer Modeling And Simulation, X- And Gamma-Ray Telescopes And Instrumentation

Scientific paper

The Imager on Board of INTEGRAL (IBIS) has to cope with very high data rates (>15.000 events/sec) from two detector layers (ISGRI and PICsIT). Because the available telemetry rate is only about 1/30 of the expected maximum data rate an on-board data reduction and pre-processing is necessary. This task is performed by a tailored fast Hardware Event Preprocessor (HEPI) and a slow programmable Data Processing Electronics (DPE). Several processing modes can be combined to adapt the instrument IBIS to the aims of the observers. The functions and methods of the digital on-board data processing (hardware and software) are described. .

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