\begin{table}%t1
\par
    \caption{\label{tab:par}Best-fit spectral parameters for the 6~\xmm\ observations
      of \hd\ discussed here. Count rates in~cts~s$^{-1}$,
        luminosity in~erg~s$^{-1}$, temperature of the plasma in~keV.}   
        %\centering
\par
    \begin{tabular}{ccccc}
    \hline\hline\noalign{\smallskip}
Date & pn rate & \lx\ (0.2--2.5 keV) & \lx\ (0.73--3.5 keV) & $kT$ \\\noalign{\smallskip}\hline\noalign{\smallskip}
2001-04-25 & $0.1830 \pm 0.055$ & $3.85 \times 10^{28}$ & $1.46 \times 10^{28}$& 0.34 \\
2001-11-01 & $0.3418 \pm 0.024$ & $6.42 \times 10^{28}$ & $2.91 \times 10^{28}$& 0.40 \\
2002-06-06 & $0.7456 \pm 0.037$ & $1.78 \times 10^{29}$ & $8.88 \times 10^{29}$& 0.81 \\
2002-11-02 & $0.2455 \pm 0.024$ & $5.31 \times 10^{28}$ & $2.31 \times 10^{28}$& 0.39 \\
2003-05-03 & $0.1522 \pm 0.017$ & $3.37 \times 10^{28}$ & $1.36 \times 10^{28}$& 0.36 \\
2003-11-22 & $0.0744 \pm 0.012$ & $2.05 \times 10^{28}$ & $7.33 \times 10^{27}$& 0.33 \\
  \noalign{\smallskip}\hline
    \end{tabular}
     \end{table}