Search Publications

The variable energy-distribution of the gamma-ray emission from Geminga

Grenier, I. A.; Hermsen, W.; Hote, C.

The gamma-ray emission of Geminga during five COS-B observations has been analysed to derive its spectral properties between 50 MeV and 5 GeV. In all observations but one, the spectrum presents a turnover between 100 and 200 MeV, the source becoming very weak at the lowest gamma- ray energies. During the remaining observation, the spectrum is cons…