Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ssrv...40..263t&link_type=abstract
(ESA, ESLAB Symposium on X-Ray Astronomy in the EXOSAT Era, 18th, The Hague, Netherlands, Nov. 5-9, 1984) Space Science Reviews
Astronomy and Astrophysics
Astronomy
1
Bursts, Spaceborne Astronomy, Spectral Energy Distribution, Thermonuclear Explosions, X Ray Sources, Black Body Radiation, Exosat Satellite, Morphology, Spectrum Analysis, Temperature Distribution
Scientific paper
In two observations with the EXOSAT ME a total of 11 bursts were detected; seven in July and four in May 1984. In terms of rise time and peak count rate, there are only two kinds, those with a sharp rise and peak count rate of 500 cts/sec/detector and those with a slow rise and a peak count rate of 200 cts/sec/detector. The spectral analysis of these bursts shows a simiar situation: for the sharp bright bursts, the black body radius increases rapidly to more than 20 km and the temperature lags. For the slow dim bursts, the temperature rises ahead of the black body radius expansion which is small and slow. The time at which half the total burst energy has been released is about 3.5 seconds for bright burts and about 8 seconds for dim ones. These gross differences may be related to the predominance of helium or hydrogen in the thermonuclear flash.
Breedon Lorraine M.
Ohashi Takuma
Turner Martin J. L.
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