The EGRET sky map of the gamma-ray sky above 100 MeV
NASA Goddard Space Flight Center, Compton Gamma-Ray Observatory (CGRO)
2015-12-02
<a rel="nofollow" class="external free" href="http://heasarc.gsfc.nasa.gov/docs/cgro/images/epo/gallery/skymaps/egret_sky.gif">http://heasarc.gsfc.nasa.gov/docs/cgro/images/epo/gallery/skymaps/egret_sky.gif</a>