\begin{table}%t1
\caption{Parameters of \psr\ (\cite{Man93a}, unless specified otherwise).}
\label{t:param}
%\begin{center}
 $${
\begin{tabular}{ccccccccccc}
\hline\hline
\multicolumn{6}{c}{Observed}& &\multicolumn{4}{c}{Derived} \wideru \\
\cline{1-6}\cline{8-11}
$P$ & $\dot P$ & $\mu^a$ & $ $ 
& $l$, $b^b$ & $D\!M^c$ & & $\tau^d$ & $B^{e}$ & $\dot E$ & $d^{f}$ \wideru \\
%
ms & $10^{-15}$ & mas yr$^{-1}$ &  
& & cm$^{-3}$ pc & & yr & G  & erg s$^{-1}$ & kpc \\ %\widerul \\ 
\hline 
50.2 &
{$479.04\pm0.10$} & $\sim$5 &  &
%\twolines{$-37.2\pm1.2$}{$28.2\pm1.3$} & $3.4\pm0.7$ &
\twolines{279\fdg7}{$-$31\fdg5} &
$146\pm4$ &&
1660&
$4.96 \times 10^{12}$ &
$1.495 \times 10^{38}$ &
$51\pm1.3$  \widerul\\
\hline
\end{tabular}}$$
\begin{tabular}{ll}
$^a$~Indirect proper motion estimates (\cite{Man93b}). & $^d$~Spin-down age $P/2\dot P$. %(\cite{SHH84}) 
\\  %\wideru\\
$^b$~Galactic coordinates (\cite{Kaa01}). & $^e$~Magnetic field  for a 10 km radius NS  $3.2\times 10^{19}(P\dot
P)^{1/2}$. %(\cite{Got03})\\  %\wideru 
\\ 
$^c$~Dispersion measure. & $^f$~Distance to the LMC (\cite{P03}). \\ % \wideru \\
\end{tabular}
%\end{center}
\par
\end{table}