Wikipedia
e-ASTROGAM is a proposed space mission with the purpose of measuring gamma-rays from astrophysical sources in the energy range from 300 keV to a few GeV. Its letter of intent has been proposed in 2016 within the ESA M5 Call. e-ASTROGAM reaches a sensitivity one-two orders of magnitude larger than its predecessor, the detector COMPTEL on the Compton Gamma Ray Observatory (CGRO), and offers as a new feature the capability of fast triggers for astrophysical transients.
e-ASTROGAM is made of 50 Silicon planes which record Compton interactions and pair production events induced by cosmic photons, by an anticoincidence detector and by a calorimeter. It is an extended version of ASTROGAM, which was proposed within the ESA M4 call in 2014
The international collaboration working to e-ASTROGAM involves scientists working in institutions from Ireland, Italy, France, Germany, Japan, Russia, Spain, Switzerland, United States.