\begin{table}%t1
   %\centering
\par
      \caption{Instruments and observations.\label{instr}}
         \begin{tabular}{lllll}
\hline\hline \noalign{\smallskip}
                    & \multicolumn{2}{c}{{\bf integral field spectroscopy}} & {\bf long-slit spectroscopy} & {\bf imaging}\\ 
\hline \noalign{\smallskip}
Telescope           & Calar Alto 3.5~m     & SAO 6~m       & SAO 6~m & CFHT 3.6~m\\
instrument          & PMAS                 & MPFS          & LSS  & OSIS \\
\hline \noalign{\smallskip}
%observation mode    & \multicolumn{2}{c}{integral field spectroscopy} & long-slit spectroscopy & H$\alpha$, $R$, $B$ imaging\\ 
Date of observation & 28.10.2001           & 15.03.2002    & 14-15.01.2002 & 11.03.2000\\
Exposure time       & $4\times900$~s mosaic, -- offsets: 4$^{\prime\prime}$       & $2\times900$~s  & 1800~s (N1-3) & $2\times1200$~s (H$\alpha$) \\
                    &                 & & 2700~s (N4-5)    &$2\times300$~s ($R$) \\
                    &                 &           &   &$2\times500$~s ($B$) \\
Seeing              & 1.0$^{\prime\prime}$                &  1.5--2.0$^{\prime\prime}$        & 1.5$^{\prime\prime}$/1.1$^{\prime\prime}$ & $\sim$$0.7^{\prime\prime}$\\
Field of view       & 8$^{\prime\prime}$~$\times$~8$^{\prime\prime}$, 12$^{\prime\prime}$~$\times$~12$^{\prime\prime}$ (mosaic)            & 16$^{\prime\prime}$~$\times$~16$^{\prime\prime}$     & 2$^{\prime\prime}\times140^{\prime\prime}$ & 3$^{\prime}$~$\times$~3$^{\prime}$\\
Pixel scale         & 0.5$^{\prime\prime}$/pix             & 1.0$^{\prime\prime}$/pix      & 0.41$^{\prime\prime}$/pix& 0.088$^{\prime\prime}$/pix\\
Image size in pixels& 2048~$\times$~4096 (binned 2$\times$2)    & 1024~$\times$~1024 & 1024~$\times$~1024 & 2048~$\times$~2048\\
Spectral coverage   & 4450--5140 \AA        & 4210--6820 \AA & 4330--6750 \AA  & --\\
Dispersion          & 0.76 \AA/binned pix   & 2.7 \AA/pix    & 2.4 \AA/pix & --\\
Spectral resolution & 1.5 \AA              & 7.0 \AA        & 7.2 \AA &--\\
%slit width          &                      &                &  2$^{\prime\prime}$  & \\
\noalign{\smallskip}
\hline
\end{tabular}
  \end{table}