\begin{table}%[t]%t1
%\centering
\par
\caption{\label{tab:campione}Details about the HST archival images of the sample galaxies.}
%
\par
\begin{tabular}{l l c c c r c l}
\hline
\hline
\noalign{\smallskip}
\multicolumn{1}{c}{Galaxy} & 
\multicolumn{1}{c}{Camera} & 
\multicolumn{1}{c}{Filter} & 
\multicolumn{1}{c}{Obs. Date} & 
\multicolumn{1}{c}{No. Exp.} & 
\multicolumn{1}{c}{Exp. Time} & 
\multicolumn{1}{c}{Prog. Id.} & 
\multicolumn{1}{c}{P.I.}\\
\noalign{\smallskip}
\multicolumn{1}{c}{} & 
\multicolumn{1}{c}{} & 
\multicolumn{1}{c}{} & 
\multicolumn{1}{c}{} & 
\multicolumn{1}{c}{} & 
\multicolumn{1}{c}{[s]} & 
\multicolumn{1}{c}{} & 
\multicolumn{1}{c}{}\\
\noalign{\smallskip}
\multicolumn{1}{c}{(1)} &
\multicolumn{1}{c}{(2)} &
\multicolumn{1}{c}{(3)} &
\multicolumn{1}{c}{(4)} &
\multicolumn{1}{c}{(5)} &
\multicolumn{1}{c}{(6)} &
\multicolumn{1}{c}{(7)} &
\multicolumn{1}{c}{(8)} \\
\noalign{\smallskip}
\hline		    
\noalign{\smallskip}        	                		 
NGC 4458 & ACS/WFC  & $F475W$ & 28 Dec. 2003 & 2 &  750 & 9401 & P. C\^ot\'e  \\
         & WFPC2/PC & $F555W$ & 18 Dec. 1998 & 3 & 1340 & 6587 & D. O. Richstone\\
         & WFPC2/PC & $F814W$ & 12 Feb. 1995 & 6 & 1120 & 5512 & S. M. Faber \\
NGC 4478 & ACS/HRC  & $F330W$ & 28 Jul. 2005 & 4 & 1912 & 10435& R. W. O'connell\\
         & ACS/WFC  & $F475W$ & 09 Jul. 2003 & 2 &  750 & 9401 & P. C\^ot\'e  \\
         & WFPC2/PC & $F555W$ & 07 Jul. 1997 & 4 & 1600 & 6587 & D. O. Richstone\\
         & WFPC2/PC & $F814W$ & 07 Jul. 1997 & 3 & 1600 & 6587 & D. O. Richstone\\
NGC 4570 & WFPC2/PC & $F336W$ & 19 Apr. 1996 & 5 & 3100 & 6107 & W. Jaffe\\
         & ACS/WFC  & $F475W$ & 13 Jul. 2003 & 2 &  750 & 9401 & P. C\^ot\'e \\ 
	 & WFPC2/PC & $F555W$ & 19 Apr. 1996 & 2 &  400 & 6107 & W. Jaffe\\
         & WFPC2/PC & $F814W$ & 19 Apr. 1996 & 2 &  460 & 6107 & W. Jaffe\\        
\noalign{\smallskip}
\hline				    	    			 
\end{tabular}
%\begin{minipage}{18.5cm}
%\begin{small}
\tablefoot{Column~(1): Galaxy name. Column~(2): camera name. Column~(3): filter
name. Column~(4): observation date. Column~(5): number of
exposures. Column~(6): total exposure time. Column~(7): HST proposal number.
Column~(8): name of the principal investigator. }
%\end{small}
%\end{minipage}
\end{table}