Abstract Imaging observations at hard X-ray and γ-ray energies of the Galactic center and Crab/A0535+26 regions are presented. The measurements were made in a series of high altitude balloon flights of a coded aperture γ-ray telescope developed by Caltech. The first coded aperture images of the Galactic center region above 35 keV reveal a strong γ-ray source located 0.7 ± 0.1° away from the Galactic nucleus, consistent with the known X-ray source 1E1740.7-2942. In addition a second source consistent in position with GX354+0 has been observed. Flux estimates and upper limits from two other known sources are also discussed. Coded aperture observations of the Crab and A0535+26 are presented, demonstrating the ability of coded aperture instruments to observe multiple time variable sources simultaneously.
Recent results of Gamma-ray imaging observations of the Galactic center and Crab/A0535+26 regions
Advances in Space Research ; 11 , 8 ; 191-202
01.01.1991
12 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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