Is this crab meat cooked?
"Pasteurized" means that it was kept at temperatures below cooking for a prolonged time, which kills most pathogens. Pasteurized food is reasonably safe for consumption without further cooking, provided it has been kept well refrigerated since the pasteurization. 

However, I doubt that the taste will be especially good after just a pasteurization. For the sake of taste, and also to further reduce food safety risks, I would cook it before eating.