| タイトル | HEAO 3 observations of strong variable 0.5-3 MeV emission from the Taurus region |
| 著者（英） | Dermer, Charles D.; Ling, James C. |
| 著者所属（英） | Jet Propulsion Lab., California Inst. of Tech.; NASA Headquarters |
| 発行日 | 1991-01-01 |
| 言語 | eng |
| 内容記述 | Preliminary results are reported of observations of strong (greater than 10 sigma) variable MeV emission from the Taurus region, possibly the Crab nebula, in 1980 by the HEAO 3 Gamma-Ray Spectroscopy experiment. The about 50-day time-averaged spectrum of the Crab shows a new component, which consists of a hard spectral 'knee' in the 0.4-1 MeV range, followed by a higher energy component extending to greater than 3 MeV, superposed on the canonical Crab power law spectrum with a spectral index of 2.2. This new spectral component was not observed four months earlier in the fall of 1979, when the spectrum was consistent with a single power law with the index of 2.2, the same as that observed in 1980. There is no indication that the gamma-ray emission was pulsed. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 92A43656 |
| 権利 | Copyright |
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