The cosmic X-ray experiment aboard HEAO-1

Rothschild, R. ; Boldt, E. ; Holt, S. ; Serlemitsos, P. ; Garmire, G. ; Agrawal, P. ; Riegler, G. ; Bowyer, S. ; Lampton, M. (1979) The cosmic X-ray experiment aboard HEAO-1 Space Science Instrumentation, 4 . pp. 269-301. ISSN 0377-7936

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The cosmic X-ray experiment aboard the HEAO-1 observatory is described, The instrument consists of six gas proportional counters of three types nominally covering the energy ranges of 0.15 keV, 1.2-20 keV, and 2.5-60 keV. The two low energy detectors have about 400 sq cm open area each while the four others have about 800 sq cm each. A novel feature of this experiment is the dual field of view collimators that allow the unambiguous determination of instrument internal background and diffuse X-ray brightness. Instrument characteristics and early performance are discussed.

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