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arXiv:astro-ph/0004152 (astro-ph)
[Submitted on 11 Apr 2000]

Title:Measurements with the Chandra X-Ray Observatory's flight contamination monitor

Authors:R. F. Elsner, J. J. Kolodziejczak, S. L. O'Dell, D. A. Swartz, A. F. Tennant, M. C. Weisskopf
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Abstract: NASA's Chandra X-ray Observatory includes a Flight Contamination Monitor (FCM), a system of 16 radioactive calibration sources mounted to the inside of the Observatory's forward contamination cover. The purpose of the FCM is to verify the ground-to-orbit transfer of the Chandra flux scale, through comparison of data acquired during the ground calibration with those obtained in orbit, immediately prior to opening the Observatory's sun-shade door. Here we report results of these measurements, which place limits on the change in mirror--detector system response and, hence, on any accumulation of molecular contamination on the mirrors' iridium-coated surfaces.
Comments: 7pages,8figures,for SPIE 4012, paper 70
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/0004152
  (or arXiv:astro-ph/0004152v1 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0004152
Related DOI: https://doi.org/10.1117/12.391600

Submission history

From: Martin C. Weisskopf [view email]
[v1] Tue, 11 Apr 2000 19:08:45 UTC (261 KB)
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