| タイトル | Observation of high-energy gamma rays from the quasi-stellar object CTA 102 |
| 著者（英） | Hartman, R. C.; Mayer-Hasselwander, H. A.; Nolan, P. L.; Lin, Y. C.; Fichtel, C. E.; Kniffen, D. A.; Mattox, J. R.; Hunter, S. D.; Bertsch, D. L.; Kanbach, G. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 1993-09-01 |
| 言語 | eng |
| 内容記述 | The quasar CTA 102 (QSO 2230 + 114) was observed four times in 1991-1992 by the EGRET high-energy gamma-ray telescope on the Compton GRO satellite. In the 1992 January 23-February 6 observation, emission was detected at the level (2.4 +/- 0.5) x 10 exp 7 photons/sq cm s (E is greater than 100 MeV). The other observations produced upper limits or detections with lower significance which are consistent with the same flux. The photon spectrum can be represented by a power law with a number index of 2.6 +/- 0.2, the softest so far observed by EGRET. The emitted gamma-ray luminosity, if isotropic, is 5 x 10 exp 47 ergs/s (H(0) = 75 km/s Mpc , q(0) = 0.5), although there are good reasons to believe that the gamma emission is strongly beamed. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 93A55233 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/314035 |
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