Search for high-energy gamma-ray emission from galaxies of the Local   Group with Fermi/LAT
  Normal galaxies begin to arise from the shadows at high energies, as can be seen with the discovery of high-energy gamma-ray emission from the Andromeda galaxy (M 31) by the Fermi /LAT collaboration.   We present a study on the search for high-energy emission around galaxies of the Local Group. No significant detection is found from the objects studied here. Upper limits on the high-energy emission of nearby normal galaxies are derived, and we discuss them in the context of gamma-ray emission from cosmic ray interactions with the local interstellar medium in these galaxies. 
Jean-Philippe Lenain, Roland Walter
astro-ph.HE astro-ph.CO