\begin{table}%t5
\caption{\label{tab:par}Observed and calculated parameters for the four warm\protect absorber components of spectrum~C.}
\par
%\centering
\small
 \begin{tabular}{@{\extracolsep{-2.5mm}}lcccc}
\hline
\hline
Component & 1 & 2 & 3 & 4 \\
\hline
$\log\xi$ & 0.07 & 0.87 & 2.32 & 3.19 \\
$\log T$ (K) & 4.21 & 4.33 & 5.14 & 5.83 \\
$nr^2$ (m$^{-1}$) & $2.4\times 10^{44}$ & $3.8\times 10^{43}$ 
                  & $1.3\times 10^{42}$ & $1.8\times 10^{41}$ \\
$v$ (km~s$^{-1}$) & --210 & --200 & --580 & --4670 \\
$m_{\rm p}nr^2v$ ($M_{\odot}$ yr$^{-1}$) & 1.3 & 0.20 & 0.021 & 0.022 \\
$\Omega$ (sr) & $<$3.8 $\times$ 10$^{-4}$ & $<$2.5 $\times$ 10$^{-3}$ &
$<$2.4 $\times$ 10$^{-2}$ & $<$2.2 $\times$ 10$^{-2}$ \\
\hline 
most abundant & & & & \\
oxygen ion $i$ & \ion{O}{v} & \ion{O}{vii} & \ion{O}{viii} & \ion{O}{viii} \\
$\tau_i n$ (s~m$^{-3}$) & $5.3\times 10^{16}$ & $8.8\times 10^{16}$ 
                         & $8.5\times 10^{16}$ & $7.4\times 10^{15}$ \\
\multicolumn{5}{l}{For $\tau_i<20$~ks or $\tau_i>20$~ks:}\\
limit on $r$ (m) & $>$$9\times 10^{15}$ & $<$$3\times 10^{15}$ 
                 & $>$$5\times 10^{14}$ & $>$$7\times 10^{14}$ \\
\multicolumn{5}{l}{For $\tau_i<570$ days:}\\
limit on $r$ (m) &        --          & $<$$2\times 10^{17}$ 
                 & $<$$3\times 10^{16}$ & $<$$4\times 10^{16}$ \\
\hline
\end{tabular}
\end{table}