\begin{table}%t1
\caption{\label{tab1}The observational parameters and derived properties.}
%\centering
\par
\begin{tabular}{l rrr c c rr }
\hline\hline\noalign{\smallskip}
Source & \multicolumn{3}{c}{Beam size} & rms & Cp & $S$ & $m$ \\
       &  $^{\prime\prime}$ & $^{\prime\prime}$ & $^\circ$ & $\mu$Jy/b   & & mJy   & \% \\
\noalign{\smallskip}\hline\noalign{\smallskip}
0657+68 & 0.56 & 0.33 &   9 &  50 &  S & 182 &         17.73 \\
        &      &      &     &     &  C &  56 &   $\lapp$0.50 \\
        &      &      &     &     &  N & 262 &         21.53 \\  
0707+68 & 0.58 & 0.35 &   5 & 165 &  W & 555 &          3.54 \\
        &      &      &     &     &  E & 151 &   $\lapp$0.55 \\
0827+37 & 0.46 & 0.35 & 177 & 110 &  W &  92 &          9.23 \\
        &      &      &     &     &  E & 766 &          5.46 \\
1014+39 & 0.44 & 0.37 &  10 &  75 &  N &  79 &   $\lapp$0.90\\
        &      &      &     &     &  S & 421 &         11.71 \\
1244+49 & 0.48 & 0.33 &   4 &  45 &  W & 229 &          5.98 \\
        &      &      &     &     &  C &  40 &   $\lapp$0.50 \\
        &      &      &     &     &  E & 278 &          5.53 \\
2207+37 & 0.51 & 0.38 & 148 & 110 &  W & 779 &          8.41 \\
        &      &      &     &     &  E &  53 &          5.82 \\
2311+46 & 0.51 & 0.34 & 155 & 150 &  W & 420 &         10.75 \\
        &      &      &     &     &  C &  75 &   $\lapp$0.75 \\ 
        &      &      &     &     &  E & 229 &   $\lapp$0.50 \\
2323+43 & 0.47 & 0.34 & 156 &  70 &  W & 544 &          1.94 \\
        &      &      &     &     &  E & 360 &   $\lapp$0.45 \\
\hline 
\end{tabular}
\end{table}