\begin{table}%t3
%\centering
\par
\caption{Unidentified lines in the spectrum of AFGL~618.}
\begin{tabular}{llll}
\hline\hline \noalign{\smallskip}
$\bar{\nu}_0$ (cm$^{-1}$) & $\lambda_0$ ($\mu$m) & $F$($\times$10$^{-18}$Wm$^{-2}$) & Possible carriers \\
\hline\noalign{\smallskip}
15.782 & 633.63 &  111.0 $\pm$   18.9 & H$^{13}$CN v2 \\
16.472 & 607.09 &  129.3 $\pm$    4.8 &  \\
18.461 & 541.68 &  206.7 $\pm$   12.3 &  \\
19.444 & 514.30 &  116.1 $\pm$    5.4 &  HCN maser? \\
19.579 & 510.75 &  110.7 $\pm$    5.4 &  \\
27.396 & 365.02 &  150.3 $\pm$    2.7 &  \\
29.715 & 336.53 &  189.6 $\pm$    8.1 &  HCN 2v2 \\
36.418 & 274.59 &  105.9 $\pm$   28.8 &  \\
%\input{14589_t3.tex}
\hline
\end{tabular}
\end{table}