Abstract The region of the Large Magellanic Cloud containing SN 1987A was observed during a balloon-flight of a hard x-ray telescope on 8–10 April 1988. Significant continuum emission was detected in the 45–400 keV range which we attribute to SN 1987A. Compared to an observation with the same instrument in October 1987, the source intensity decreased by ∼50% while the spectral shape remained qualitatively the same. This may represent the first clear indication that the hard x-ray emission is entering the declining phase expected as the ejecta become optically thin to the 56Co gamma-rays.
Balloon-borne hard x-ray observations of SN 1987A
Advances in Space Research ; 10 , 2 ; 55-58
1989-01-01
4 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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