Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Search for VHE pulsed emission from the Crab with the CAT Telescope   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.

10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
4
The categories of this paper are: cond-mat