\begin{table}%t1
\caption{\label{tab:observ}Summary of the X-ray observations of IGR~0023 and RX~J2133.}
\small%%\centerline

 {
\begin{tabular}{l l l l r c}
\hline\hline 
%&&&&& \\[-8pt]
Object	& Instrument	& Date			& UT (start)	& Exposure time (s)$^a$  & Net count rate ($\ctss$)\\
\hline
IGR 0023	& EPIC-pn		& 2007-07-10    & 05:58			& 24~660		& $0.984 \pm 0.007$ \\
		& EPIC-MOS		&				& 05:36			& 26~540		& $0.345 \pm 0.004$ \\
		& RGS			&				& 05:35 		& 26~706		& $0.038 \pm 0.001$ \\
		& OM-V			&				& 05:44			& 1960		& $3.26 \pm 0.04$	\\
		&				&				& 06:22			& 1959		& $3.12 \pm 0.04$	\\
		&				&				& 07:01			& 1960		& $2.79 \pm 0.04$	\\
		&				&				& 08:12			& 1962		& $2.97 \pm 0.04$	\\
		&				&				& 08:50			& 1959		& $2.85 \pm 0.04$	\\
		& OM-$UVM2$		&				& 09:28			& 1960		& $0.16 \pm 0.01$	\\
		&				&				& 10:06			& 1959		& $0.19 \pm 0.01$	\\
		&				&				& 10:45			& 1960		& $0.20 \pm 0.01$	\\
		&				&				& 11:23			& 1960		& $0.18 \pm 0.01$	\\
		&				&				& 12:01			& 1960		& $0.18 \pm 0.01$	\\
		& IBIS/ISGRI	& 				&				& ${\sim}6~900~000$	& $0.10 \pm 0.01$ \\
\hline
RX J2133 & EPIC-pn		& 2005-05-29	& 13:33			& 13~585		& $5.42 \pm 0.02$ \\
		& EPIC-MOS		&				& 12:47			& 16~580		& $1.398 \pm 0.008$ \\
		& RGS			&				& 13:28 		& 13~890		& $0.147 \pm 0.004$ \\
		& OM-B			&				& 10:11			& 2320		& $24.9 \pm 0.1$ \\
		& 				&				& 10:55			& 2319		& $23.2 \pm 0.1$ \\
		& 				&				& 11:39			& 2319		& $22.4 \pm 0.1$ \\
		& 				&				& 12:23			& 2319		& $22.1 \pm 0.1$ \\
		& 				&				& 13:07			& 2320		& $23.7 \pm 0.1$ \\
		& OM-$UVM2$		&				& 13:51			& 2319		& $0.69 \pm 0.02$ \\
		& 				&				& 14:35			& 2321		& $0.68 \pm 0.02$ \\
		& 				&				& 15:20			& 2320		& $0.89 \pm 0.02$ \\
		& 				&				& 16:03			& 2320		& $0.85 \pm 0.02$ \\
		& 				&				& 16:48			& 2319		& $0.87 \pm 0.02$ \\
		& EPIC-pn		& 2005-07-06	& 18:03			& 9~871		& $5.12 \pm 0.03$ \\
		& EPIC-MOS		&				& 17:05			& 13~680		& $1.105 \pm 0.009$ \\
		& RGS			&				& 17:04 		& 13~910		& $0.120 \pm 0.005$ \\
		& OM-$UVM2$		&				& 17:31			& 1681		& $0.60 \pm 0.02$ \\
		& 				&				& 18:16			& 1679		& $0.70 \pm 0.02$ \\
		& 				&				& 19:20			& 1680		& $0.64 \pm 0.02$ \\
		& 				&				& 19:53			& 1680		& $0.69 \pm 0.02$ \\
		& 				&				& 20:27			& 1679		& $0.59 \pm 0.02$ \\
		& IBIS/ISGRI	&				&				& ${\sim}3~740~000$	& $0.55 \pm 0.02$ \\
		& XIS-FI		& 2006-04-29	& 06:50			& 84~288		& $0.738 \pm 0.002$ \\
		& XIS-BI		&				& 06:50			& 84~288		& $0.892 \pm 0.004$ \\
		& HXD			&				& 06:50			& 62~879		& $0.739 \pm 0.004$ \\
\hline
\end{tabular}}
\medskip
$^a$ We report total exposure times for the \emph{INTEGRAL} observations and net exposure times for the others.
\end{table}