Observation to detect VHE gamma-ray emissions has been carried out at Mt.Chacaltaya with the SYS air shower array since Feb.1986. A significant excess of hadron-less air showers with energies above 1014eV from the direction of Scorpius X-1 has been found during the last fifteen days in May 1986. However, no excess as the continuous emissions could be observed for several X-ray binary objects in the southern hemisphere. Small abundance of hadron-less air showers could be seen from the diffused region of galactic centre.
|Number of pages||8|
|Journal||Nuclear and Particle Physics Proceedings|
|State||Published - Apr 1990|