External Collaboration. Optical Gamma Ray Observations of PulsarsDr Christian Gouiffes and Dr Phillipe Lauren : DSM Irfu Service dAstrophysique, Bat. 709 Orme des Merisiers CEA Saclay, 91191 Gif-sur-Yvette Cedex, France�Optical Observations of PulsarsProf Cesare Barbieri �and Prof. Giampiero Naletto : University of Padua, ItalyPolarimetric Observations of PulsarsDr Aga �S #322;owikowska and Dr Roberto Mignani : University of Zielona Gora Poland