\begin{table}%t3
      \caption{Spectral log.}
         \label{spectra}
%\begin{center}
{\begin{tabular}{lll}
            \noalign{\smallskip}
\hline\hline
	Slit centers &  & Exp. times$^{a}$  \\
\hline
	 $\alpha$ & $\delta$ & (No of spectra)$^{b}$    \\
 \hline 
20\h19\m17\s & 40\degr45\arcmin20\arcsec 	& 7800 (2) \\
 \hline
20\h22\m53\s & 40\degr26\arcmin21\arcsec 	& 7800 (2)\\
 \hline
%20\h13\m08\s & 39\degr43\arcmin15\arcsec 	& 3600 (1) \\
% \hline
\end{tabular}}
\parbox{6.5cm}{
${^a}$ Total exposure time in s.\\
${^b}$ Number of spectra obtained. }
   %\end{center}
\par
   \end{table}