Comptel constraints on unidentified EGRET sources
Zhang S(张澍); Zhang, S; Collmar, W; Schonfelder, V
刊名ASTROPHYSICS AND SPACE SCIENCE
2005
卷号297期号:1-4页码:#REF!
关键词gamma rays : unidentified gamma-ray sources
学科分类Astronomy & Astrophysics
DOI10.1007/s10509-005-7666-y
通讯作者Zhang, S (reprint author), Inst High Energy Phys, Lab Particle Astrophys, Beijing 100039, Peoples R China.
文章类型Article; Proceedings Paper
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.
类目[WOS]Astronomy & Astrophysics
收录类别SCI
WOS记录号WOS:000228545100029
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被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/227412
专题中国科学院高能物理研究所_粒子天体物理中心_期刊论文
中国科学院高能物理研究所_粒子天体物理中心
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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!.
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