\begin{table}%t1
  \caption{Summary of the SMA observations. }\label{observations}
  \small%\centerline
{
	\begin{tabular}{l c}
	\hline \hline
	Source					& 	L1489~IRS \\
	$\alpha,\delta$(2000)$^a$	& 	04:04:42.85, +26:18:56.3 \\
	Frequency\qquad\qquad	&	267.55762 GHz (1.12 mm) \\
	\hline\noalign{\smallskip}
	Integrated line intensity		& 41.85 Jy beam$^{-1}$ km s$^{-1}$\\
	Peak line intensity				& 2.04 K\\
	\qquad Noise level (rms)		& 0.35 Jy beam$^{-1}$ \\
	Continuum flux					& 36.0 $\pm$ 2.3 mJy    \\
	\qquad Noise level (rms) 		& 3.7 mJy beam$^{-1}$ \\
	Synthesized beam size			& $0.9''\times 0.7''$ \\
	\quad (Uniform weighting)       & \\
    \hline
  \end{tabular}}
\smallskip
$^a$ Coordinates are given at the position where the continuum emission peaks.
\end{table}