What is VERITAS?
VERITAS (Very Energetic Radiation Imaging Telescope Array System) is a major ground-based gamma-ray observatory. VERITAS is an array of four 12 meter optical reflectors for gamma-ray astronomy in the GeV - TeV photon energy range.
VERITAS uses the Imaging Atmospheric Cherenkov Telescope technique to observe gamma-rays that cause particle showers in Earth's upper atmosphere. For more information, see the VERITAS website.