\begin{table}%t6
 \caption{Peak positions of continuum and molecular line emission detected 
 with the PdBI and the ATCA toward Sgr~B2(N).}
\label{t:positions}
\par
\small%\centerline
 {
 \begin{tabular}{cccl}
  \hline\hline
  & RA (J2000) & Dec (J2000) & Comments\\
  & $17^{{\rm h}}47^{{\rm m}}$ & $-28^\circ22\arcmin$ & \\
  \hline
  & \multicolumn{2}{c}{PdBI} & \\
  82 & $19\fs886 \pm 0\fs005$ & $18.4\arcsec \pm 0.1\arcsec$ & continuum 82.0 GHz\\
  P1 & $19\fs89 \pm 0\fs01$ & $18.8\arcsec \pm 0.2\arcsec$ & mean AAN$^a$ F2 to F6\\
  P2 & $19\fs88 \pm 0\fs01$ & $13.5\arcsec \pm 0.2\arcsec$ & mean HC$_3$N $v_7=1$,  C$_2$H$_5$CN\\
  P3 & $19\fs79 \pm 0\fs01$ & $17.8\arcsec \pm 0.3\arcsec$ & peak CH$_3$OCHO\\
  \hline
  & \multicolumn{2}{c}{ATCA} & \\
  95 & $19\fs87 \pm 0\fs01$ & $18.7\arcsec \pm 0.1\arcsec$ & mean continuum\\
  & & & 93.2 and 97.4 GHz\\
  P4 & $19\fs85 \pm 0\fs02$ & $18.9\arcsec \pm 0.2\arcsec$ & mean AAN F7 to F10\\
  P5 & $19\fs86 \pm 0\fs01$ & $13.8\arcsec \pm 0.1\arcsec$ & mean HC$^{13}$CCN $v_7=1$,\\
  & & & CH$_3$OH $v_{{\rm t}}=1$\\
  \hline
 \end{tabular}}
\medskip
$^a$ AAN stands for amino acetonitrile. 
\end{table}