Search for VHE pulsed emission from the Crab with the CAT Telescope

1999/06/02 by A. Musquère, Musquere, A.
Earth and Planetary Sciences · Physics and Astronomy · #Astrophysics (astro-ph) #Astrophysics and Cosmic Phenomena #FOS: Physical sciences #Geophysics and Gravity Measurements #Pulsars and Gravitational Waves Research

paper · pdf · doi:10.48550/arxiv.astro-ph/9906042

openalex publication_date 1999/06/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

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.

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