Accurate and efficient computation of synchrotron radiation functions

We consider the computation of three functions which appear in the theory of synchrotron radiation. These areF(x)=x∫x∞K5/3(y) dyFp(x)=xK2/3(x) and Gp(x)=x1/3K1/3(x), where Kν denotes a modified Bessel function. Chebyshev series coefficients are given which enable the functions to be computed with an accuracy of up to 15 sig. figures.