NASA NTRS · 19720037846
The UHURU X-ray instrument.
Abstract
On Dec. 12, 1970, the UHURU X-ray observatory was launched into equatorial orbit with the prime mission of conducting an all-sky survey of astronomical X-ray sources with intensities of 0.00005 Sco-X1 or greater. The X-ray detection system contains 12 gas-filled proportional counters, 6 behind each collimator. The aspect system is discussed together with the structure, the pulse height analyzer, the command system, the calibration system, and the power distribution system. Pulse shape discrimination circuits used on UHURU use the same technique that was used on the system originally developed for large area proportional counters described by Gorenstein and Mickiewicz (1968).
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Jagoda, N., Austin, G., Mickiewicz, S., Goddard, R.. 1972-02-01. The UHURU X-ray instrument.. https://ntrs.nasa.gov/citations/19720037846
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