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Proceedings Paper

Main lessons from the SIGMA mission for the future of hard x-ray and soft gamma-ray astronomy
Author(s): Francois Lebrun; Jaques Paul
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Paper Abstract

The hard X-ray/soft gamma-ray telescope SIGMA has been successfully operating for more than two years aboard the soviet spacecraft GRANAT. This paper is intended to give a report of the most important technical as well as astrophysical inferences which have been obtained from this mission. From these, the mandatory capabilities of a future mission with their relative priorities can be drawn. The most important ones are (1) simultaneous spectral and imaging capabilities, (2) a wide field of view, and (3) a better sensitivity at 0.5 MeV. A sketch of a possible future satellite experiment fulfilling these requirements is given. It is a spectral imager in the sense that priority is given to the angular resolution in comparison with the spectral resolution. Its field of view (360 degree(s) X 10 degree(s)) enables continuous monitoring of the galactic plane emission, involving no cooling, no mechanics, and a coarse stabilization, it should be very reliable, thus allowing a long duration mission. A highly eccentric orbit of the same type as that of GRANAT would be the most efficient.

Paper Details

Date Published: 8 October 1992
PDF: 7 pages
Proc. SPIE 1743, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy III, (8 October 1992); doi: 10.1117/12.130677
Show Author Affiliations
Francois Lebrun, Ctr. d'Etudes Nucleaires de Saclay (France)
Jaques Paul, Ctr. d'Etudes Nucleaires de Saclay (France)


Published in SPIE Proceedings Vol. 1743:
EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy III
Oswald H. W. Siegmund, Editor(s)

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