Spectral properties of 3EG gamma-ray sources outside the galactic plane
D.L. Bertsch, R.C.Hartman, S.D. Hunter, D.J. Thompson
P.F. Michelson, Y.C. Lin, P.L. Nolan
G. Kanbach, H.A. Mayer-Hasselwander
Most of the high-energy gamma-ray sources within the third EGRET catalogue are accompanied
by their spectral index. However, a more closer look revealed, that in various cases single
power-law fits show significant difficulties to explain the data between 30 MeV and
10 GeV in a sufficient way. Additionally, deviations from a common spectral index through all
available EGRET observations are already reported. This included currently a few AGN, like
3C279 and 1622-297, in different states of activity. Here a detailed spectral study for the EGRET
sources outside the galactic plane is presented. In particular, spectral details on unidentified
high-latitude sources are provided. Deviations from simple single power-law fits are investigated,
and alternative fits are suggested in appropriate cases.
File translated from TEX by TTH, version 2.32.
On 16 Jul 1999, 09:18.