The absolute phases of Geminga observed by COMPTEL Obs. 1 and EGRET Obs. 1 have been compared. The phase-resolved imaging results obtained by a direct demodulation method show that the garmma-ray emission of Geminga in 10-30MeV may exist mainly in the peak 1 phase region. This result conforms to the variation trend of intensity ratio P2/P1 with energy.
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