Evidence for micrometeoroid damage in the pn-CCD camera system aboard XMM-Newton
| Autor: | Gisela Hartner, Heinrich Bräuninger, Bernd Aschenbach, Joachim Trümper, Lothar Strüder, J. Kemmer, G. Drolshagen, P. Holl, R. Hartmann, Jakob Englhauser, Norbert Meidinger, M. Stübig |
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| Rok vydání: | 2001 |
| Předmět: |
Physics
Pixel Physics::Instrumentation and Detectors Micrometeoroid business.industry Astrophysics::High Energy Astrophysical Phenomena Astrophysics::Instrumentation and Methods for Astrophysics Astronomy Astronomy and Astrophysics law.invention Telescope Orbit Cardinal point Optics Space and Planetary Science Observatory law Reflection (physics) business Radiation hardening |
| Zdroj: | Astronomy & Astrophysics. 375:L5-L8 |
| ISSN: | 1432-0746 0004-6361 |
| Popis: | 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 cm 2 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 o the X-ray telescope mirror surface nally reached the focal plane detector and produced the damage. |
| Databáze: | OpenAIRE |
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