The Gamma-Ray Imager is an
initiative of the European Gamma-Ray Community aiming in the definition
of the next European Gamma-Ray mission within ESA's Cosmic Vision
2015-2025 program. The initiative has been started with a prospects
seminar held in Rome (Italy) on March 18th, 2005. The conclusions of this
seminar have been presented to ESA during the ESLAB Symposium, held at
ESTEC from April 19-21th, 2005 in Noordwijk (Netherlands).
The declared goal of
the initiative is to respond to the ESA call for missions for the Cosmic
Vision 2015-2025 program with a well defined mission proposal. For
this purpose, a Science Working Group has been set-up, which held its
kick-off meeting in Toulouse (France) from June 6-7th, 2005. The Science
Working Group is composed of Gamma-Ray Astronomers from all over Europe,
and aims in the definition of the scientific objectives and the detailed
mission design of the Gamma-Ray Imager.