  Since 1996, the CAT experiment, operating at the THEMIS site (French
Pyrenees), has been collecting Very High Energy (VHE) gamma-ray data from the
Crab. The temporal analysis of photon arrival times folded with the pulsar
parameters did not reveal any significant pulsation. The upper limit of a
steady pulsed flux over the 102.7 hours of observation is 1.5 10^-12
cm^-2.s^-1, 3.0 10^-13 cm^-2.s^-1 and 5.4 10^-14 cm^-2.s^-1 above 250 GeV, 1
TeV and 5 TeV, respectively. These results put stringent constraints on the
models of high energy pulsar electrodynamics.
