We profited from discussions with O.C. De Jager both on the emission mechanism in the Crab Nebula, and on Crab data analysis. The support of the HEGRA experiment by the German Ministry for Research and Technology BMBF and by the Spanish Research Council CYCIT is acknowledged. We are grateful to the Instituto de Astrofisica de Canarias for the use of the site and for providing excellent working conditions. We gratefully acknowledge the technical support staff of Heidelberg, Kiel, Munich, and Yerevan.
© European Southern Observatory (ESO) 2000
Online publication: October 10, 2000