\begin{table}%t5
\caption {\label{tab5}Iron K line variability.}\vspace*{-2.5mm}
%\centerline
 {\begin{tabular}{lccccc}
\hline\hline
\noalign{\smallskip}
Data & Range & Exposure & Counts & $F_{\rm 3-10}$ & $I_{\rm FeK}$ \\
& (1) & (2) & (3) & (4) & (5) \\
\hline
\multicolumn{6}{l}{Time order} \\
{\it i-1} & 0--90 & 40.0 & 5243 & 4.0 & $\rm 7.5^{+2.3}_{-1.9}$ \\[2mm]
{\it i-2} & 90--160 & 29.8 & 2450 & 2.5 & $\rm 8.1^{+1.9}_{-2.2}$ \\[2mm]
{\it i-3} & 160--230 & 29.0 & 4117 & 4.3 & $\rm 7.1^{+3.1}_{-2.1}$ \\ [5pt]
\multicolumn{6}{l}{Flux order} \\
L & $\leq$$ 0.30$ & 51.8 & 3592 & 2.2 & $\rm 5.7^{+1.7}_{-1.5}$ \\[2mm]
M & 0.30--0.55 & 31.7 & 4772 & 4.4 & $\rm 7.0^{+1.8}_{-2.6}$ \\[2mm]
H & $\geq $$0.55$ & 16.2 & 3681 & 6.7 & $\rm 9.4^{+3.4}_{-3.9}$ \\
\hline 
\end{tabular}}
\tablefoot {(1) in unit of $10^3$ s in the light curve
  in Fig.~\ref{fig1} for the time intervals, or \cps for the source count rate
  range
(2) $10^3$ s
(3) background-corrected integrated counts
(4) 3--10 keV flux in $10^{-12}$~\ergpspsqcm\
(5) Fe K line flux in $10^{-6}$~\phpspsqcm .
Note: the error in the line flux is of the order of~$1\sigma $.}
\end{table}