Detection of the Crab pulsar above 100 GeV

It has been long thought that gamma-ray emission from pulsars cuts off sharply above a few GeV and that no emission would be observable above 100 GeV. With the VERITAS array of four imaging atmospheric Cherenkov telescopes we conducted a deep observation of the Crab pulsar and detected significant pulsed emission above 100 GeV. We discuss the detection and put it into context with present theoretical interpretation.