Volume 375, Number 1, August III 2001
|Page(s)||L5 - L8|
|Published online||15 August 2001|
Evidence for micrometeoroid damage in the pn-CCD camera system aboard XMM-Newton
Max-Planck-Institut für extraterrestrische Physik, Giessenbachstraße, 85748 Garching, Germany
2 ESA/ESTEC, Postbus 299, 2200 AG Noordwijk, The Netherlands
3 KETEK GmbH, Am Isarbach 30, 85764 Oberschleißheim, Germany
4 Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
Corresponding author: L. Strüder, firstname.lastname@example.org
Accepted: 26 June 2001
The mirror systems of the X-ray observatory XMM-Newton were designed to image X-rays up to 15 keV by grazing incidence reflection onto a focal plane, equipped with Charge Coupled Devices (CCDs). In orbit #156 we have observed a sudden increase of about 35 "bright" pixels spread over 15 cm2 in the pn-CCD camera system. The amount of locally generated leakage current cannot be explained by ionizing particles. We suggest that a micrometeoroid scattered under a small angle off the X-ray telescope mirror surface finally reached the focal plane detector and produced the damage.
Key words: telescopes / space vehicles: instruments / meteors, meteoroids / interplanetary medium
© ESO, 2001
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