| タイトル | A search for pre- and post-burst emission from well-localized gamma-ray burst locations |
| 本文（外部サイト） | http://hdl.handle.net/2060/19940030484 |
| 著者（英） | Emslie, A. Gordon |
| 著者所属（英） | Alabama Univ. |
| 発行日 | 1994-04-01 |
| 言語 | eng |
| 内容記述 | We present the results from the first long-term search for nonburst gamma-ray emission from the positions of 70 intense, well-localized bursts. Using the BATSE occultation technique, designed for monitoring of discrete sources, these burst positions were measured in the energy range of approximately 15 keV to 1.8 MeV over a 112 day interval during 1991. None of these 70 locations exhibited detectable emission at or above the level of approximately 5 x 10(exp -9) ergs cm(exp -2) s(exp -1) during the 112 day interval. This level is approximately 1000 times less than the typical intensity of the burst associated with the given location. In addition, 35 intense gamma-ray bursts detected by BATSE were examined in a five day interval centered on the time of detection. We find no compelling evidence that these bursts emit preburst emission or display prompt postburst emission at a level of approximately 5 x 10(exp -9) ergs cm(exp 2) s(exp -1) on timescales of approximately 1 hr or longer. The lack of detectable long-term emission or preburst and postburst emission from the positions of gamma-ray bursts has important consequences for a variety of burst production models. |
| NASA分類 | SPACE RADIATION |
| レポートNO | 94N34990
NASA-CR-195825
NAS 1.26:195825 |
| 権利 | No Copyright |
|
