GRIPS - The potential of a future MeV survey
  We describe the potential of GRIPS, a future MeV mission. The Gamma-Ray Imaging, Polarimetry and Spectroscopy ("GRIPS") concept combines a Compton and pair telescope, and will be a very sensitive polarimeter. GRIPS would perform a continuously scanning all-sky survey from 200 keV to 80 MeV achieving a sensitivity which is better by a factor of 40 compared to the previous missions in this energy range. 
J. Greiner, G. Kanbach, K. Mannheim (for the GRIPS collaboration,   www.grips-mission.eu)
astro-ph.HE