\begin{table}%t1 \caption{\label{tab:wray977}Characteristics of the \bpcru\ system.} \small%\centerline { \begin{tabular}{ll} \hline\hline \multicolumn{2}{l}{\bpcru} \\ \hline RA(J2000) 12:26:37.6 & Dec(J2000) $-$62:46:14 \\ Orbital period & 41.5~d \\ \hline \multicolumn{2}{l}{\wr$^a$} \\ \hline Mass & 39--68~\msun \\ Radius & 62~\rsun \\ $T_{\rm eff}$ & 18~100~K \\ Luminosity & $5\times 10^{5}~L_{\odot}$ \\ Mass-loss rate & $10^{-5}$~\msun~yr$^{-1}$ \\ Wind velocity & 305~km~s$^{-1}$ \\ \hline \multicolumn{2}{l}{\gx} \\ \hline Mass$^a$ & 1.85~\msun\\ Spin period$^c$ & 696~s \\ Surface magnetic field$^b$ & $4\times 10^{8}$~T \\ \hline \end{tabular}} \medskip $^a$ \citealt{kap06}; $^b$ \citealt{kre04}; $^c$ \citealt{whi76}. \end{table}