\begin{table}%t1
  \caption{Summary of observations.}
   \label{table1}  
%\centering
\par
  \begin{tabular}{ccccccccc}
    \hline\hline
    Observations & Telescope & Date & Exp. time & Spatial & Filter/ & PA & Spectral & $\Delta\lambda$ \\
                 &           &      &    (s)  & ($\arcsec$ pix$\rm^{-1}$)& grating &($\rm^{\circ}$) & (\AA\ 
pix$\rm^{-1}$)& (\AA) \\
	\hline
    Broad-band & 2.2 m CAHA & 00/12/19 & 3   $\times$ 1200& 0.53  & $V$  & \nodata &\nodata & \nodata \\
	imaging    & 2.56 m NOT  & 03/01/20 & 3   $\times$  300& 0.19  & $B$  & \nodata &\nodata & \nodata \\
	           & 2.56 m NOT  & 03/01/20 & 6   $\times$  300& 0.19  & $R$  & \nodata &\nodata & \nodata \\
	           & 1.55 m CST & 02/09/24 & 120 $\times$ 20&    1.0  & $J$  & \nodata &\nodata & \nodata \\
	           & 1.55 m CST & 02/09/24 & 240 $\times$ 10&    1.0  & $H$  & \nodata &\nodata & \nodata \\
	           & 1.55 m CST & 02/09/24 & 360 $\times$ 5 &    1.0  & $K_{\rm s}$ & \nodata &\nodata & \nodata \\
    \hline
    Intermediate & 4.2 m WHT & 00/12/31& 1800 $\times$ 3 & 0.20 & $R600B$& 358.0 & 0.45 & 3650--5100\\
    resolution   & 4.2 m WHT & 00/12/31& 1800 $\times$ 3 & 0.36 & $R136R$& 358.0 & 1.49 & 5300--6650\\
    spectroscopy & 2.5 m INT & 99/12/28& 1200 $\times$ 4 & 0.40 & $R400V$& 357.0 & 1.40 & 3500--7700 \\
    & 2.5 m INT & 99/12/29& 1200 $\times$ 3 & 0.40 & $R400V$&   6.0 & 1.40 & 3500--7700 \\
 & 2.5 m INT & 99/12/29& 1200 $\times$ 3 & 0.40 & $R400V$&  62.0 & 1.40 & 3500--7700 \\
 & 2.5 m INT & 99/12/29& 1200 $\times$ 3 & 0.40 & $R400V$& 120.0 & 1.40 & 3500--7700 \\
\hline
\end{tabular}
\end{table}