Constraints on the Cosmic Infra-Red Background based on BeppoSAX and CAT spectra of Mkn 501

J. Guy, C. Renault, F. A. Aharonian +2

The TeV and X-ray data obtained by the imaging Cherenkov telescope CAT and X-ray satellite BeppoSAX during the remarkable flare of Mkn 501 in April 16, 1997 are used to constrain t…