Gamma-ray bursts observed from the Hinotori satellite |
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| Authors: | M Yoshimori K Okudaira Y Hirasima I Kondo |
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| Institution: | (1) Department of Physics, Rikkyo University, Toshima, Tokyo, Japan;(2) Institute for Cosmic Ray Research, University of Tokyo, Tanashi, Tokyo, Japan |
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| Abstract: | During February, 1981 and June, 1982 the gamma-ray and the hard X-ray spectrometers on the Hinotori satellite observed four gamma-ray bursts on 28 February, 21 July, 1981, 26 February and 13 March, 1982. These gamma-ray bursts were simultaneously observed by other satellites. The time histories and energy spectra are shown for these gamma-ray bursts, and the burst sizes (erg cm–2) are estimated. Two possible source locations for the burst of 21 July, 1981 are roughly determined from arrival time delays between two pairs of satellites, PVO-Hinotori and ISEE-3-Hinotori. The weak gamma-ray line peak structure around 1.8 MeV was observed for the burst of 13 March, 1982. The line could be interpreted in terms of gravitationally redshifted neutron capture line at 2.22 MeV. |
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