\begin{table}%t4
\caption{Parameters of our best-fit LTE model of amino acetonitrile.}
 \label{t:aan30mmodel}
\small%\centerline
 {
 \begin{tabular}{ccccc}
 \hline\hline
&&&& \\[-8pt]
 \multicolumn{1}{c}{Size$^{a}$} & \multicolumn{1}{c}{$T_{{\rm rot}}$} & \multicolumn{1}{c}{$N_{{\rm AAN}}$$^{b}$} & \multicolumn{1}{c}{{\it FWHM}} & \multicolumn{1}{c}{$V_{{\rm off}}$$^{c}$} \\ 
  \multicolumn{1}{c}{\scriptsize ($''$)} & \multicolumn{1}{c}{\scriptsize (K)} & \multicolumn{1}{c}{\scriptsize (cm$^{-2}$)} & \multicolumn{1}{c}{\scriptsize (km~s$^{-1}$)} & \multicolumn{1}{c}{\scriptsize (km~s$^{-1}$)} \\ 
 \multicolumn{1}{c}{(1)} & \multicolumn{1}{c}{(2)} & \multicolumn{1}{c}{(3)} & \multicolumn{1}{c}{(4)} & \multicolumn{1}{c}{(5)} \\ 
 \hline
&&&& \\[-8pt]
 2.0 &  100 & $ 2.80 \times 10^{16}$ & 7.0 & 0.0 \\  \hline
 \end{tabular}}
\medskip
$^a$ Source diameter ({\it FWHM}). \\
$^b$ Column density of amino acetonitrile. \\
$^c$ Velocity offset with respect to the systemic velocity of Sgr~B2(N) $V_{{\rm lsr}} = 64$~km~s$^{-1}$.
\end{table}