Comptel constraints on unidentified EGRET sources
文献类型：期刊论文
| 作者 | Zhang S(张澍) ; Zhang, S; Collmar, W; Schonfelder, V
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| 刊名 | ASTROPHYSICS AND SPACE SCIENCE
 |
| 出版日期 | 2005 |
| 卷号 | 297期号:1-4页码:#REF! |
| 关键词 | gamma rays : unidentified gamma-ray sources |
| 通讯作者 | Zhang, S (reprint author), Inst High Energy Phys, Lab Particle Astrophys, Beijing 100039, Peoples R China. |
| 英文摘要 | A major legacy of the EGRET experiment aboard the Compton Gamma-Ray Observatory (CGRO) is the detection of a large number of unidentified Gamma-ray sources. Out of the 271 EGRET sources are 170 not identified yet [Hartman et al. ApJS ( 123) ( 1999) 79]. To provide additional information on these unidentified EGRET sources, we derived simultaneous MeV fluxes or flux limits for each source by analyzing the contemporaneous COMPTEL data. Then we compare these MeV fluxes to the extrapolations of the published EGRET spectra. Our results can be grouped into 4 categories [Zhang et al. A& A ( 421) ( 2004) 983]: ( 1) non-constraining upper limits (similar to 120 sources), ( 2) hints (> 2 sigma) or detections with consistent MeV fluxes (similar to 16 sources), ( 3) enhanced MeV emission ( 2 sources), and ( 4) constraining MeV flux limits, requiring a spectral break (similar to 22 sources). In summary, for about 40 of the unidentified EGRET sources we can provide supplementary spectral information in the neighboring gamma-ray band, which - together with other source parameters might provide clues to the underlying source nature. |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 收录类别 | SCI |
| WOS记录号 | WOS:000228545100029 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/227412]  |
| 专题 | 高能物理研究所_粒子天体物理中心 |
| 推荐引用方式 GB/T 7714 | Zhang S,Zhang, S,Collmar, W,et al. Comptel constraints on unidentified EGRET sources[J]. ASTROPHYSICS AND SPACE SCIENCE,2005,297(1-4):#REF!. |
| APA | 张澍,Zhang, S,Collmar, W,&Schonfelder, V.(2005).Comptel constraints on unidentified EGRET sources.ASTROPHYSICS AND SPACE SCIENCE,297(1-4),#REF!. |
| MLA | 张澍,et al."Comptel constraints on unidentified EGRET sources".ASTROPHYSICS AND SPACE SCIENCE 297.1-4(2005):#REF!. |
入库方式： OAI收割
来源：高能物理研究所
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