The STACEE Ground-Based Gamma-Ray Detector
  We describe the design and performance of the Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE) in its complete configuration. STACEE uses the heliostats of a solar energy research facility to collect and focus the Cherenkov photons produced in gamma-ray induced air showers. The light is concentrated onto an array of photomultiplier tubes located near the top of a tower. The large Cherenkov photon collection area of STACEE results in a gamma-ray energy threshold below that of previous ground-based detectors. STACEE is being used to observe pulsars, supernova remnants, active galactic nuclei, and gamma-ray bursts. 
STACEE Collaboration: D. M. Gingrich, L. M. Boone, D. Bramel, J.   Carson, C. E. Covault, P. Fortin, D. S. Hanna, J. A. Hint...