Abstract
The emission of neutral particles from Cygnus X-3 has been searched for at energies above 5× eV, using data from the Akeno 20- air-shower array spanning the period December 1984 to July 1989. A 3.5σ dc excess is observed aroung the Cygnus X-3 region. This excess corresponds to a flux of (1.8±0.7)× above 5× eV, in agreement with the Fly’s Eye data, but not the Haverah Park data. The signals do not show any 4.8-h periodicity. Their arrival times seem to be bunched in correlation with event-rate increases observed at eV with the Akeno 1- array.
- Received 1 December 1989
DOI:https://doi.org/10.1103/PhysRevLett.64.1628
©1990 American Physical Society