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The particle background of the Rosat PSPCIn order to permit quantitative studies of the diffuse cosmic X-ray background and of extended X-ray sources, the particle induced background of the Roentgen Satellite, Rosat, Position Sensitive Proportional Counter (PSPC) is parameterized. Data collected during 210,000 s of PSPC operation have been analyzed and the temporal, spectral, and spatial distributions investigated. About 77 percent of the residual events originate within the detector while the remainder enter through the counter window. During typical conditions, the count rate of the residual events is well correlated with the Master Veto (MV) count rate. The spectrum of these events is well described by a flat component plus a soft power law and an Al K-alpha line at 1.5 keV. Also during typical conditions, the ratio between the power law and flat components remains constant to +/- 4 while the relative Al K-alpha contribution increases with increasing MV count rate. The distribution of the counts over the field of view is uniform except for a slight radial dependence and shadowing caused by blockage of the externally produced component by the window support structure.
Document ID
19920063061
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Snowden, S. L.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Plucinsky, P. P.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Briel, U.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Hasinger, G.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Pfeffermann, E.
(Max-Planck-Institut fuer Extraterrestrische Physik Garching, Federal Republic of Germany, United States)
Date Acquired
August 15, 2013
Publication Date
July 10, 1992
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 393
Issue: 2 Ju
ISSN: 0004-637X
Subject Category
Space Radiation
Accession Number
92A45685
Funding Number(s)
CONTRACT_GRANT: NAG5-629
Distribution Limits
Public
Copyright
Other

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