Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-03-26
in X-Ray and Gamma Ray Instrumentation for Astronomy XI, eds. K. A. Flanagan and O. H. W. Siegmund,Procs. of SPIE, 4140, 178 (
Astronomy and Astrophysics
Astrophysics
10 pages, 5 figs., in X-Ray and Gamma Ray Instrumentation for Astronomy XI, SPIE conference, San Diego, Aug. 2000
Scientific paper
We describe a concept for a NASA SMEX Mission in which Gas Electron Multiplier (GEM) detectors, developed at CERN, are adapted for use in X-ray astronomy. These detectors can be used to obtain moderately large detector area and two-dimensional photon positions with sub mm accuracy in the range of 1.5 to 15 keV. We describe an application of GEMs with xenon gas, coded mask cameras, and simple circuits for measuring event positions and for anticoincidence rejection of particle events. The cameras are arranged to cover most of the celestial sphere, providing high sensitivity and throughput for a wide variety of cosmic explosions. At longer timescales, persistent X-ray sources would be monitored with unprecedented levels of coverage. The sensitivity to faint X-ray sources on a one-day timescale would be improved by a factor of 6 over the capability of the RXTE All Sky Monitor.
Becker Ulrich J.
Boughan Edward A.
Bradt Hale V.
Levine Alan M.
Morgan Edward Harrington
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