\[R_{m,n}^{(1)}(z)=\begin{cases}O\left(e^{-|z|-z}z^{-m}\right),&|\operatorname{%
ph}z|\leq\pi,\\
O\left(z^{-m}\right),&\pi\leq|\operatorname{ph}z|\leq\frac{5}{2}\pi-\delta,%
\end{cases}\]