Compton γ射线望远镜的直接解调成像

Ｃｏｍｐｔｏｎγ射线望远镜ＣＯＭＰＴＥＬ／ＣＧＲＯ工作于０．７５－３０ＭｅＶ能区，本文应用直接解调方法分析ＣＧＲＯ＃１观测的ＣＯＭＰＴＥＬ数据，准确定出Ｃｒａｂγ射线源的位置，在１０－３０ＭｅＶ能区，分辨开最大似然法所不能完全分辨的Ｃｒａｂγ射线源和类星体ＰＫＳ０５２８＋１３４，得出优于传统成像方法所得的成像结果．应用直接成像方法处理γ射线脉冲星Ｇｅｍｉｎｇａ分位相数据，发现Ｇｅｍｉｎｇａ在１０－３０ＭｅＶ能区仍存在辐射，辐射集中在Ｇｅｍｉｎｇａ第一个峰的位相区域．结果表明，应用直接解调方法对Ｃｏｍｐｔｏｎ望远镜数据作成像分析是完全可行的

Image Analyses of COMPTEL Data using a Direct Demodulation Method

The Compton Gamma-Ray Telescope, COMPTEL/CGRO, works in the energy range of 0.75-30MeV.We have analyzed COMPTEL/CGRO #1 data using the direct demodulation method. The Gamma-ray source Crab was located exactly; the Crab and the quasar PKS0528 134 which could not be resolved by the maximum likelihood method were resolved completely in the energy range 10-30MeV. The imaging results are better than that using traditional methods. The image analys is of phase resolved data of the gamma-ray pulsar Geminga shows that Geminga still has emission in the energy range 10-30MeV and the emission comes mainly from the phase region peak 1. We draw a conclusion from this work that the application of the direct demodulation method to the image analysis of Compton Telescope data is feasible.