\begin{table}%t3
\caption{\label{plates}Summary of the observations. Repeated plates between epoch~II and epoch~III 
are marked with an~$*$.}
%\centering
\small
\begin{tabular}{llll} 
\hline
\hline
Plate ID                & Exp.     & Airmass  & Seeing  	\\ 
$[$archive name$]$      & [s]      & s($z$) & [$''$]        	\\
\hline
\multicolumn{4}{c}{epoch I}\\
GIRAF.2003-06-01T01:55:28 &  1200 &   1.213 &  	0.8 \\
GIRAF.2003-06-29T02:49:33 &  1200 &   1.002 &  	0.6 \\
GIRAF.2003-07-02T05:11:52 &  1200 &   1.256 &  	1.3 \\	
GIRAF.2003-07-09T04:27:48 &  1200 &   1.200 &  	0.7 \\
GIRAF.2003-07-09T04:59:48 &  1200 &   1.318 &  	0.6 \\
GIRAF.2003-07-09T05:41:10 &  1200 &   1.548 &  	0.7 \\
GIRAF.2003-07-09T06:22:54 &  1200 &   1.935 &  	0.6 \\
GIRAF.2003-07-20T04:56:23 &  1200 &   1.538 &   0.6 \\				GIRAF.2003-07-08T03:32:29 &  1500 &   1.066 &  	0.7 \\
GIRAF.2003-07-08T04:09:32 &  1500 &   1.139 &  	0.7 \\
GIRAF.2003-07-08T04:51:48 &  1500 &   1.269 &  	0.6 \\
GIRAF.2003-07-08T05:31:32 &  1500 &   1.461 &  	0.7 \\
GIRAF.2003-07-08T06:13:11 &  1500 &   1.785 &  	0.7 \\
GIRAF.2003-07-21T04:07:03 &  1500 &   1.295 &   0.5 \\
GIRAF.2003-07-22T03:49:21 &  1500 &   1.242 &  	0.5 \\
GIRAF.2003-07-22T04:24:29 &  1500 &   1.394 &  	0.5 \\			GIRAF.2003-07-07T04:25:37 &  1800 &   1.170 &  	1.3 \\
GIRAF.2003-07-20T01:42:22 &  1800 &   1.006 &  	0.9 \\
GIRAF.2003-07-20T03:33:25 &  1800 &   1.167 &   0.9 \\
GIRAF.2003-07-20T04:16:24 &  1800 &   1.318 &  	0.7 \\
GIRAF.2003-07-21T01:54:33 &  1800 &   1.015 &  	0.7 \\
GIRAF.2003-07-21T02:40:59 &  1800 &   1.066 &   0.8 \\
GIRAF.2003-07-21T03:25:57 &  1800 &   1.158 &  	0.4 \\
GIRAF.2003-07-21T04:50:01 &  1800 &   1.522 &  	0.6 \\
GIRAF.2003-07-22T02:02:22 &  1800 &   1.024 &  	0.5 \\
\hline
\multicolumn{4}{c}{epoch II}\\
$*$ 
GIRAF.2006-07-31T01:34:42 &  1200 &   1.032 &  	0.8 \\
GIRAF.2006-09-04T23:24:34 &  1200 &   1.045 &  	0.8 \\
GIRAF.2006-09-04T23:59:28 &  1200 &   1.101 &  	0.9 \\
GIRAF.2006-09-05T01:24:01 &  1200 &   1.380 &  	1.0 \\
GIRAF.2006-09-05T00:50:39 &  1200 &   1.238 &  	0.9 \\
GIRAF.2006-09-06T00:53:35 &  1200 &   1.264 &   0.8 \\
GIRAF.2006-09-06T02:10:30 &  1200 &   1.728 &  	0.8 \\
$*$ 
GIRAF.2006-07-31T02:09:45 &  1500 &   1.080 &   0.8 \\
GIRAF.2006-08-01T23:28:08 &  1500 &   1.025 &  	0.9 \\
GIRAF.2006-08-02T01:12:13 &  1500 &   1.019 &  	0.8 \\	
GIRAF.2006-08-02T01:52:06 &  1500 &   1.064 &  	0.7 \\
GIRAF.2006-08-02T02:27:43 &  1500 &   1.132 &  	0.7 \\
GIRAF.2006-08-02T03:03:13 &  1500 &   1.234 &  	0.8 \\
GIRAF.2006-09-04T01:04:04 &  1500 &   1.274 &   0.8 \\
GIRAF.2006-09-04T00:20:55 &  1500 &   1.139 &   0.8 \\
GIRAF.2006-09-05T02:01:48 &  1500 &   1.620 &  	0.9 \\
$*$ 
GIRAF.2006-07-31T02:48:50 &  1800 &   1.166 &   0.8 \\
GIRAF.2006-07-31T03:38:40 &  1800 &   1.346 &   0.7 \\
GIRAF.2006-08-10T00:25:57 &  1800 &   1.009 &   1.4 \\ 
GIRAF.2006-09-03T23:40:14 &  1800 &   1.061 &   1.6 \\
GIRAF.2006-09-06T00:11:51 &  1800 &   1.137 &  	0.6 \\
GIRAF.2006-09-06T01:28:52 &  1800 &   1.427 &  	1.0 \\
GIRAF.2006-09-07T01:08:31 &  1800 &   1.343 &  	1.0 \\
GIRAF.2006-09-14T23:55:17 &  1800 &   1.187 &  	1.1 \\
GIRAF.2006-09-15T23:54:20 &  1800 &   1.196 &   1.2 \\
GIRAF.2006-09-16T23:56:54 &  1800 &   1.216 &  	0.9 \\
GIRAF.2006-09-17T00:37:45 &  1800 &   1.384 &  	1.0 \\
GIRAF.2006-09-18T00:02:53 &  1800 &   1.251 &  	0.8 \\
\hline
\multicolumn{4}{c}{epoch III}\\
$*$ 
GIRAF.2006-09-05T23:39:26 & 1200  &   1.394 &   1.3 \\
$*$ 
GIRAF.2006-09-05T02:37:05 & 1500  &   1.072 &   1.1 \\
$*$ 
GIRAF.2006-09-06T23:45:30 & 1800  &   1.190 &   1.0 \\
\hline
\end{tabular}
\end{table}