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Analysis of COS-B and HEAO-B satellite data of the pulsar Geminga

Song, Li-Ming; Wu, Mei; Ma, Yu-Qian +4 more

Timing and spectral analysis of COS-B and HEAO-B satellite data of the pulsar Geminga are presented. The results confirm that Geminga is a pulsar with a strong gamma emission and a weak X-ray emission. A phase histogram of Geminga in different energy ranges from a summation of four COS-B observations is given.

Geminga pulsar in COS-B and HEAO-B observations.

Sun, X.; Ma, Y.; Li, T. +4 more

PSR 1820-11: a binary gamma-ray pulsar.

Li, Ti-Pei; Wu, Mei

Significant pulsation structure in the phase distribution of 50 - 6000 MeV gamma-rays from the direction of the binary radio pulsar PSR 1820-11 in the COS-B data was obtained by the folding algorithm. Besides period searches, a spatial analysis was performed and a clear point-like image at the pulsar's position for gamma-rays above 50 MeV was obta…

Pulsed gamma-rays from PSR 1951 + 32

Li, Ti-Pei; Wu, Mei; Ma, Yu-Qian +1 more

In a previous paper [1] we obtained statistically significant evidence for a 39-ms period in the COS-B data of 30-5000 MeV gamma rays in the direction of PSR 1951 + 32. Most of the gamma photons from PSR 1951 + 32 are pulsed and concentrated in a narrow interval of phase. We have examined the partical distribution of gamma ray intensity in the reg…