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SMM observation of a cosmic gamma-ray burst from 20 keV to 100 MeV
Institution:1. Institute for Financial & Accounting Studies (IFAS), Xiamen University, Xiamen, Fujian 361005, China;2. Perella Department of Finance, College of Business and Economics, Lehigh University, 621 Taylor Street, Bethlehem, PA 18015, United States;3. The University of Adelaide Business School, Adelaide, South Australia 5005, Australia
Abstract:The Solar Maximum Mission γ-ray spectrometer (GRS) has detected an intense γ-ray burst that occurred on 1984 August 5. The burst originated from a source in the constellation Hydra and lasted about 45 s. Its integral fluence
></figure> 20 keV was 3 × 10<sup>−3</sup> erg cm<sup>−2</sup>. Spectral evolution similar to other bursts detected by SMM was observed. The overall shape of the spectrum from 20 keV to 100 MeV, on timescales as short as 2 s, is relatively constant. This shape can be fitted by the sum of an exponential-type function and a power law. The spectral shape of this event may be characteristic of many γ-ray bursts. There is no evidence for narrow or broadened emission lines.</td>
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