ガンマ線バーストの観測
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概要
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Status of gamma-ray burst observation is summarized together with the recent result obtained by the Gamma-ray Burst Detector (GBD) on board Ginga satellite. Gamma-ray bursts are thought to originate in the vicinity of neutron stars because of the fast time variability, spectral features and several-second periodicity observed in some peculiar events. The GBD on board Ginga have detected about ten gamma-ray burst candiates so far. The burst spectra are confirmed to approach to black-body radiation at the end of bursts in some events. The temperature and photon flux of the black-body-like spectra gives the ratio of the radius and distance of the burst sources, (R/km)/(D/kpc)∿1.
- 宇宙航空研究開発機構の論文