\begin{table}%t1
\caption{\label{tab:log}The log of the X-ray and optical/NIR observation of the  field of Abell~3571 used for this work.}
\par
%\centering
\small
\begin{tabular}{cccc}
\hline
\hline
Instrument &  Date & Band & Exposure \\
           & dd-mm-yyyy    &       & s \\ 
\hline
ROSAT-PSPC & 12-08-1992	   & 0.3--2.4 keV      &   5800\\
ROSAT-HRI  & 05-08-1994    & 0.3--2.4 keV      &  19~200\\
XMM-{\em Newton}-EPIC-PN & 29-07-2002 & 0.3--2.4 keV       & 24~200\\
{\em Chandra}-ACIS-S & 31-07-2003 & 0.3--2.4 keV          & 33~900\\
ESO/MPI-GROND & 12-08-2008   & $g, r',i', z'$ & 458  \\
ESO/MPI-GROND & 12-08-2008   & $J,H,K$ & 480  \\
\hline
\end{tabular}
\end{table}