\begin{table}%t4
%\centering
\par
\caption{Variability parameters. \label{var}}
\begin{tabular}{lcccc}
\hline
\hline
\multicolumn{5}{c}{\bf{30/10--2/11 2000}}\\
%\hline
\hline
Energy band & $<$Count rate$>^a$ & $\sigma^2_{\rm rms}{}^a$ & $< \sigma^2_{\rm rms}>{}^b$ & $T_{\rm short}^b$ \\
(keV) & ($10^{-2}$ cts/s) & ($10^{-2}$) & ($10^{-2}$) & (ks)\\
\hline
LECS & 17.6 & $15.2$ & $12.8$  & 6.3\\
0.5--2~keV & $\pm$7.2 & $\pm$3.3 & $\pm$1.6 & $\pm$0.6 \\
\hline
MECS & 14.7 &11.4 & 10.1 & 5.5 \\
2--4~keV & $\pm $5.3 & $\pm$2.5 & $\pm$1.5 & $\pm$0.5 \\
\hline 
MECS & 7.4 & 7.9 & 7.5 & 7.1 \\
4--10~keV & $ \pm$2.5 & $\pm $2.1 & $\pm$1.1 & $\pm$1.3\\
\hline
%\small
\multicolumn{5}{l}{$^a$ From 600~s rebinned light curves.}\\[-1.5mm] 
\multicolumn{5}{l}{$^b$ Weighted mean of data taken from~500, 1000, 1500,
2000~s}\\[-1.5mm]
\multicolumn{5}{l}{ rebinned light curves.}
\end{tabular}
\end{table}