\begin{table}%t1
\caption{\label{tab:data}Photospheric, chromospheric and coronal observations of AR~8210 on May~1,~1998. $\Delta x$ is the pixel size, $\Delta t$ is the time between
two consecutive observations.} 
%\centering
\par
\begin{tabular}{ccccc}					  \hline  \hline
Instrument & Wavelength & Obs. time & $\Delta x$ & $\Delta t$ \\
\hline 
SOHO/MDI & Ni I at 676.8 nm & 17:00--23:00 & 1\farcs98 & 1 min \\
MSO/IVM & FeI at 630.25 nm & 17:07--21:40 & 1\farcs1 & 3 min \\
\hline 
NSO/BBSO & H$\alpha$ at 656.3 nm & 17:00--21:08 & 1\arcsec & 1 min \\
MSO/MCCD & '' & 17:00--22:00 & 2\farcs4 & 15 s \\
\hline 
SOHO/EIT & Fe XII at 19.5 nm & 17:00--23:00 & 2\farcs46 & 15 min \\
Yohkoh/SXT & Soft X-rays & 17:16--22:16 & 4\farcs9 and 9\farcs8 & $\sim$8~min \\ 
\hline
\end{tabular}
\end{table}