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Measurements with the Chandra Flight Contamination MonitorNASA'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.
Document ID
20000044317
Acquisition Source
Marshall Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Elsner, R. E.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Kolodziejczak, J. J.
(NASA Marshall Space Flight Center Huntsville, AL United States)
ODell, S. L.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Swartz, D. A.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Tennant, A. F.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Weisskopf, M. C.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 2000
Subject Category
Astronomy
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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