\begin{table}%t1
\par
\caption {\label{tab:c2h10}Line parameters$^{a}$ observed in \cch(1$-$0)} % title of Table 
%\centerline
 {   
\begin{tabular}{c c c c}  
\hline\hline % inserts double horizontal lines 
$\alpha,\delta$ offsets & $V_{\rm LSR}$ & $\Delta V$ & $\tau_{\rm total}^{\;b}$ \\ % table heading
$[$\arcsec,\arcsec] & [km s$^{-1}$] & [km s$^{-1}$] &\\  
\hline % inserts single horizontal line 
\multicolumn{4}{c}{L1498}\\
$0,0$ & 7.80(0.01) & 0.17(0.01) & 29.4(0.3)\\
$60,-40$ & 7.74(0.03) & 0.21(0.01) & 28.3(0.4)\\
\hline
\multicolumn{4}{c}{CB246}\\
$0,0$ & $-$0.83(0.01) & 0.24(0.01) & 13.5(0.3)\\
$15,-30$& $-$0.78(0.01) & 0.26(0.01) & 20.9(1.1)\\
$-60,15$ & $-$0.87(0.01) & 0.27(0.01) & 14.4(0.7)\\
\hline %inserts single line 
% \caption{Notes.ÑThe hyperÞne Þtting model assumes constant Tex and homogeneous abundance 
% and does not consider velocity gradient effects along the line of sight.}
\end{tabular}}
\par
\smallskip 
$^a$ Numbers in parentheses represent the errors from the fit.\\
$^b$ Sum of the peak optical depth of the six hyperfine components.
\end{table}