Very high energy γ-rays from galactic sources

被引：0
|
作者：
P. R. Vishwanath
机构：
[1] Tata Institute of Fundamental Research,
来源：
Journal of Astrophysics and Astronomy | 2002年 / 23卷
关键词：
Galactic sources; γ-ray astronomy; PACT;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The field of Very High Energy (VHE) gamma ray astronomy using the Atmospheric Cerenkov Technique has entered an interesting phase with detection of various galactic and extragalactic sources. Among galactic sources, only the Crab nebula has been established as a standard candle. Most observations on pulsars are in agreement as to the necessity for the GeV spectra to steepen at < 200 GeV. While the Imaging method for increase of sensitivity has been successful with many results, an alternate technique —Wavefront Sampling Technique- is also being used by an increasing number of experiments. The recently commissioned experiment at Pachmarhi (PACT) in India is presented as an example of this technique. Preliminary results from this experiment show detection of VHE γ-ray emission from (a) the Crab nebula at a high significance and (b) Crab and Geminga pulsars at > 1.5 TeV which could be the second component of the Outer Gap pulsar models.
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页码：45 / 51
页数：6
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