0220154

We propose an INTEGRAL observation of the cluster of galaxies withpowerful radio halo Coma. A detection of the hard X-ray emission from this clusters at $Esim100$~keV will allow us to distinguishbetween different mechanisms of generation of the hard X-rayemission (e.g. inverse Compton vs. suprathermal bremsstrahlung) and to derive the enrgy densities of the magnetic field and relativistic particles in the intracluster medium. [truncated! Please see actual data for full text]