タイトル | Gamma-ray observations of Cygnus X-1 and Cygnus X-3 using a coded-aperture telescope |
著者(英) | Forrest, D. J.; Owens, A.; Mcconnell, M. L.; Vestrand, W. T.; Dunphy, P. P. |
著者所属(英) | New Hampshire Univ. |
発行日 | 1989-08-01 |
言語 | eng |
内容記述 | A balloon-borne coded-aperture telescope, measuring gamma-ray photons in the 160 keV to 9.3 MeV range, was used to observe the Cygnus region of the sky on October 1 and 2, 1984. In the 2-9.3-MeV band, evidence is found for a hard spectral component with a mean flux level at the top of the atmosphere of 7.4 + or - 2.5 x 10 to the -7th photons/sq cm per s per keV, inconsistent with the predictions of the inverse Compton models normally used to describe the X-ray emission. Both Cyg X-1 and Cyg X-3 could be observed simultaneously with the telescope. The results are used to establish 1-sigma upper flux limits on the spectral emission from Cyg X-3. |
NASA分類 | ASTROPHYSICS |
レポートNO | 89A46653 |
権利 | Copyright |
URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/362355 |
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