Gamma radiation from the celestial X-ray source sco X-1

Gamma radiation from the X-ray sources Sco X-1 due to Comptonsynchrotron process is calculated. Comparison with the upper limits set by an experimental survey for sources of gamma-rays with energy greater than 100 MeV has been made and constraints on the size of the source and its magnetic field are discussed. The flux predicted in the energy range 10¹¹–10¹² eV is above the observable lower limit of presentday detectors. An observation of this flux will serve as a test of the synchrotron origin of the X-radiation.