\begin{table}%t2
\caption{\label{grism}Grisms used for the observations.}
%\centering
\small
    \begin{tabular}{l c c c c}
      \hline \hline
Grism & Dispersion  & Resol. & $\lambda$ range & $\lambda$ range \\
       & (\AA\ pixels$^{-1}$)  &(2$\arcsec$ slit) & CCD 1 & CCD 2 \\
      \hline
      LR-B  & 2.52 & 1200 & 3500--8050 & 3500--7700 \\
      VHR-R & 0.70 & 5000 & 6050--7800 & 6100--7700 \\
      VHR-I & 0.68 & 6000 & 7200--8900 & 7250--8800 \\
      \hline
    \end{tabular}
\end{table}