\begin{table}%t1
\caption{\label{log}The log of all analysed observations, and exposure times. Values in brackets show net exposure times after filtering for particle induced flares.}
%\centering
\par
\begin{tabular}{llll}
\hline
\hline
\textbf{Date} & \textbf{Mission} & \textbf{Instr.} & \textbf{$\vec{T}{\rm _{exp}}$
(ks)} \\
\hline
11/05/1994 & {\it ASCA}  & \textsc{sis0-1} & 34 \\
\hline
29/11/1996 & {\it ASCA}  & \textsc{sis0-1} & 27 \\
\hline
 & & \textsc{lecs} & 36 \\
24/04/1998 & BeppoSAX & \textsc{mecs} & 77 \\
 & & \textsc{pds} & 33 \\
\hline
14/11/2000 & {\it Chandra} & \textsc{acis-s hetg} & 76 \\
\hline
13/05/2001 & XMM-{\it Newton}  & \textsc{epic-pn} & 38 (6.0)\\
\hline
01/12/2001 & XMM-{\it Newton}  & \textsc{epic-pn} & 25 (19.1)\\
\hline
\end{tabular}
\end{table}