Max-Planck-Institut für extraterrestrische Physik
|Deutsche Version||MPE HEG X-Ray Astronomy Wave ROSAT Gallery ROSAT Calendar Images 1999|
Tracks of high-energy particles in X-ray CCDs
The X-ray CCDs designed by MPE for the satellite missions XMM and ABRIXAS are not only sensitive to X-rays but also to high energetic particles such as protons, muons, etc., which are found in cosmic rays. They generate most of the unwanted background in X-ray measurements. In the silicon chip of the detector tracks of particles, which ionize the silicon, are clearly recognized. The charge released thereby corresponds to that of an X-ray photon with an energy of more than 16 keV. This large deposited charge can be used to distinguish X-rays from particles making it possible to eliminate the latter.
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ROSAT (Röntgensatellit) 1999
Images from the X-ray sky with the ROSAT telescope · All rights reserved:
© Max-Planck-Institut für extraterrestrische Physik, Postfach 1603, 85740 Garching, Germany.
The X-ray images are produced by the SASS/EXSAS software MPE, ESO-MIDAS.
The ROSAT project is managed by the Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR), Germany on behalf of the Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie (BMBF).
© X-Ray Group at MPE (group)
|© Max-Planck-Institut für extraterrestrische Physik|