Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977itns...24..804r&link_type=abstract
(IEEE, ERDA, NASA, and NBS, Nuclear Science Symposium, 23rd, Scintillation and Semiconductor Counter Symposium, 15th, and Nuclea
Astronomy and Astrophysics
Astronomy
3
Collimators, Proportional Counters, Radiation Detectors, X Ray Astronomy, Accumulators, Electronic Equipment, Light Sources, Pulse Amplitude, Sensitivity, Telemetry, X Ray Sources
Scientific paper
The Scanning Modulation Collimator X-ray instrument for the HEAO-A satellite was designed to measure celestial radiation in the range between 1 and 15 KeV and to resolve, and correlate, the position of X-ray sources with visible light sources on the celestial sphere to within 5 arc seconds. The positional accuracy is made possible by mechanical collimation of the X-ray sources viewed by the instrument. High sensitivity is provided from two systems each containing four gas filled proportional counters followed by preamplification, signal summing, pulse height analysis, pulse shape discrimination, X-ray event accumulators and telemetry processing electronics.
Ballas J.
Jagoda N.
McKinnon P.
Ramsey Andrew
Roy Anirban
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