Cygnus experiment at Los Alamos

The Cygnus experiment at Los Alamos National Laboratory has been designed to study, with high angular accuracy, point sources of gamma rays above 1014 eV. The experimental detector consists of an air shower array to observe gamma ray showers and a shielded, large area track detector to study the muon content of the showers. In this paper we present preliminary data from the array and describe its performance.