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The Detection of High-Energy X-Rays from Ara XR-1 and Nor XR-1

Published online by Cambridge University Press:  25 April 2016

R. M. Thomas
R. M. Thomas*
Affiliation:
Department of Physics, University of Adelaide
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Extract

This paper presents observations of weak X-ray sources at photon energies between 20 and 100 keV which were made during a balloon flight conducted from Mildura, Australia on 29 February 1968. Results obtained from Sco XR-1 and the Sagittarius region during this flight have been presented elsewhere, and here we report additional results obtained during a search of an area of sky in which several sources have been reported from rocket experiments at photon energies below about 10 keV. The detector used was an actively collimated and shielded NaI(T1) crystal, 2 mm thick and 54.3 cm2 in area. Incident photons were sorted into 16 energy channels between 7 and 167 keV (1.76 to 0.07 Å). The collimator field of view was 8°FWHM; the telescope axis was fixed at a zenith angle of 32° and its azimuth angle was varied by rotating the observatory below the balloon. This allowed the telescope to scan back and forth in azimuth across a source, the azimuth angle at any time being indicated by magnetometers.

Type
Contributions
Information
Publications of the Astronomical Society of Australia , Volume 1 , Issue 4 , December 1968 , pp. 165 - 166
Copyright
Copyright © Astronomical Society of Australia 1968

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References

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