[NTG-context] MathTimes usage

I have the YandY MathTimes fonts and would like to use them in ConTeXt but do not know how to get them into action. In the source there are some references to MathTimes but nothing I try does something simple like for the lucida fonts: \setupbodyfont[lbr] Maybe I missed the magic invocation for \setupbodyfont[MathTimes-magic]? Hope someone can help. Hans van der Meer