\begin{table}%t2
       \caption{\label{spectra}Spectral log.}
      %\centerline
{
         \begin{tabular}{llll}
           \hline
\hline
 Slit centers &  & Exp. times$^{a}$ &  Position$^{c}$ \\
\hline
   $\alpha$ & $\delta$                     & ($\#$)$^{b}$  &  \\
 23\h49\m09\s & 63\degr30\arcmin27\arcsec 	& 7800 (2)  & I  \\
 23\h49\m18\s & 63\degr33\arcmin06\arcsec 	& 3600 (1)  & II \\
 23\h55\m45\s & 62\degr53\arcmin12\arcsec 	& 7200 (2)  & III \\
23\h58\m00\s & 63\degr23\arcmin00\arcsec 	& 7800 (2)  & IV \\
\hline
 00\h00\m38\s & 63\degr16\arcmin03\arcsec        & 7200 (2)  & V \\
00\h02\m55\s & 63\degr17\arcmin59\arcsec        & 7200 (2)  & VI \\ 
00\h02\m32\s & 63\degr30\arcmin04\arcsec        & 7200 (2)  & VII \\
23\h58\m22\s & 63\degr55\arcmin14\arcsec        & 3600 (1)  & VIII \\
\hline
\end{tabular}}
\smallskip
${^a}$ Total exposure time in s.\\ 
${^b}$ Number of spectra acquired. \\ 
${^c}$ Marked as in Fig.~\ref{fig01}.  
   \end{table}