Prof. Cui is a member of the VERITAS collaboration. At the core of the collaboration are members of the former Whipple collaboration that pioneered the Atmospheric Cherenkov Imaging Technique, which revolutionized the field of ground-based gamma ray astrophysics. VERITAS consists of an array of four 12 m Cherenkov telescopes. Compared to the Whipple telescope, it delivers roughly an order of magnitude improvement both in sensitivity and lower energy threshold.

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