The participants in the project are:

1. – USSR, by developing the Granat spacecraft (Scientific and Production Association S.A. Lavochkin, G.N. Babakin Research Center) and the instruments in the scientific equipment packages

2. – ART-P, ART-S, KONUS-V, ‘Podsolnukh’ (Sunflower), KS-18M (IKI of the Academy of Sciences of the USSR, Leningrad Institute of Physics and Technology of the Academy of Sciences of the USSR, Nuclear Physics Science and Research Institute of the Moscow State University);

3. – France (CNES), by developing and delivering the gamma ray telescope SIGMA, the high energy spectrometer Phoebus, a memory device with 128 Mbit capacity, and a system for determining the current orientation of the telescope (star sensor);

4. – Denmark (Danish Institute for Space Research), by developing the wide-angle X-Ray telescope VOTCh;

5. – Bulgaria (TsLKI Bulgarian Academy of Sciences), by developing and delivering certain control instruments for the ‘Podsolnukh’ apparatus.