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In-Flight Calibration of the Energetic Gamma-Ray Experiment Telescope (EGRET) on the Compton Gamma-Ray ObservatoryThe Energetic Gamma-Ray Experiment Telescope (EGRET) on the Compton Gamma-Ray Observatory has been operating for over seven years since its launch in 1991 April. This span of time far exceeds the design lifetime of two years. As the instrument has aged, several changes have occurred due to spark chamber gas exchanges as well as some hardware degradation and failures, all of which have an influence on the instrument sensitivity. This paper describes post-launch measurements and analysis that are done to calibrate the instrument response functions. The updated instrument characteristics are incorporated into the analysis software.
Document ID
19990062012
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Esposito, J. A. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Bertsch, D. L. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Chen, A. W. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Dingus, B. L. (Utah Univ. Salt Lake City, UT United States)
Fichtel, C. E. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Hartman, R. C. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Hunter, S. D. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Kanbach, G. (Max-Planck-Inst. fuer Extraterrestrische Physik Garching, Germany)
Kniffen, D. A. (Hampden-Sydney Coll. VA United States)
Lin, Y. C. (Stanford Univ. Stanford, CA United States)
Mayer-Hasselwander, H. A. (Max-Planck-Inst. fuer Extraterrestrische Physik Garching, Germany)
McDonald, L. M. (Raytheon Co. Greenbelt, MD United States)
Michelson, P. F. (Stanford Univ. Stanford, CA United States)
vonMontigny, C. (Tuebingen Univ. Germany)
Mukherjee, R. (Barnard Coll. New York, NY United States)
Nolan, P. L. (Stanford Univ. Stanford, CA United States)
Schneid, E. (Northrop Grumman Corp. Bethpage, NY United States)
Sreekumar, P. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Thompson, D. J. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Tompkins, W. F. (Stanford Univ. Stanford, CA United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1998
Subject Category
Space Radiation
Funding Number(s)
CONTRACT_GRANT: NAS5-96051
CONTRACT_GRANT: NCC5-95
CONTRACT_GRANT: DFG-328
CONTRACT_GRANT: BMBF-50QV9095
CONTRACT_GRANT: NCC5-93
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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