Calibration of VERITAS Telescope 1 via Muons
  Cherenkov light from cosmic-ray muons is a significant source of background for the Imaging Atmospheric Cherenkov Technique. However, muon events are also valuable as a diagnostic tool because they produce distinctive ring images, and the expected amount of Cherenkov light per unit arclength can be accurately calculated. We report on a comparison of real and simulated muon events in VERITAS Telescope 1, using this comparison to validate the detector model and to determine the light collection efficiency of the telescope. 
T. B. Humensky (for the VERITAS Collaboration)