\begin{table}%T1
  %\centering
\par
  \caption{Log of VLT spectroscopic observations.}\label{tab:obs}
  \begin{tabular}{ccrcllccclcc}
    \hline
    \hline
    %\noalign{\smallskip}
    \rm GRB &
    {\rm UT ~ date}$^{{a}}$ &
    $\Delta T$ &
    \rm instr. &
    \rm grism ~ (filter) &
    {\rm coverage}$^{{b}}$ &
    \rm slit width &
    {\rm resolution}$^{{c}}$  &
    \rm dispersion &
    \rm exptime &
    \rm seeing &
    \rm airmass \\
    &
    &
    \rm (days) &
    &
    &
    \rm (\AA) &
    (\arcsec) &
    \rm (\AA) &
    \rm (\AA/pixel) &
    \rm (min) &
    (\arcsec) &
    \\
    \hline
    991216 & \rm 1999~Dec.~18.159 & 1.49  & \rm FORS1 & \rm 150I (OG590) & 3800--9500 & 1 & 24 & 5.3 & $6\times10^{{d}}$& 0.6 & 1.24--1.27\\
    011211 & \rm 2001~Dec.~13.253 & 1.45  & \rm FORS2 & \rm 300V         & 3600--8900 & 1 & 10 & 2.6 & $9\times10$             & 1.1 & 1.20--1.94\\
    021211 & \rm 2002~Dec.~30.294 & 18.82 & \rm FORS2 & \rm 300V         & 3600--9500 & 1 & 11 & 3.2 & $3\times10$             & 0.7 & 1.20--1.24\\
    \hline 
  \end{tabular}
  \begin{list}{}{} 
  \item[$^{{a}}$] Start of the first exposure.
  \item[$^{{b}}$] Without order sorting filter, the second
  order will start to contaminate the spectrum above $\sim$7000~\AA.
  \item[$^{{c}}$] The resolution is approximately constant
  across the entire spectrum.
  \item[$^{{d}}$] The first three exposures are taken without order
  sorting filter, followed by three with filter.
  \end{list}
\end{table}