\[U\left(-\tfrac{1}{2}\mu^{2},\mu t\sqrt{2}\right)\sim\frac{g(\mu)e^{-\mu^{2}\xi%
}}{(t^{2}-1)^{\frac{1}{4}}}\sum_{s=0}^{\infty}\frac{{\cal A}_{s}(t)}{\mu^{2s}},\]