\begin{table}%t3 \caption{\label{tab3}Summary of the properties of CXO J17545-28 in comparison to magnetic O and WR and Of?p stars.} %\centerline {\begin{tabular}{lccccc} \hline \hline ID & Spec. & log($L_{\rm bol}$) & log($L_{\rm x}$) & log($L_{\rm x}$/$L_{\rm bol}$) & Ref. \\ & type & (erg~s$^{-1}$)& (erg~s$^{-1}$) & & \\ \hline CXO J1745-28 & WN9h & 39.8 & 35.0 & $-4.8$ & 1, this study \\ & & & & & \\ $\theta^1$ Ori C & O7 V & 39.0 & 33.0 & $-6.0$ & 2,3,4 \\ $\zeta$ Ori A & O9.7Ib & 38.8 & 32.1 & $-6.7$ & 5,6 \\ HD 108 & O4f?p$\leftrightarrow$O8.5fp & 39.2 & 33.1 & $-6.1$ & 2,3 \\ HD 148937 & O5.5-6f?p & 39.3 & 33.3 & $-6.0$ & 3,7 \\ HD 152408 (=WR 79a) & WN9ha& 39.6 & 31.9 & $-7.7$ & 8 \\ HD 164794 & O4 V((f))& 39.5 & 33.1 & $-6.4$ & 9 \\ HD 191612 & O6.5f?pe$\leftrightarrow$O8fp & 39.1 & 32.9 & $-6.1$ & 2 \\ \hline \end{tabular}} \medskip \par Note that no magnetic field determinations have been made for HD~108, while HD 164974 (=9 Sgr) is a suspected CWB. References for this table are: (1) Mikles et~al. (\cite{m06}); (2) N\'aze et~al. (\cite{naze07}); (3) N\'aze et~al. (\cite{naze08}); (4) Gagn\'e et~al. (\cite{gagne}); (5) Raassen et~al. (\cite{raassenmag}); (6) Bouret et~al. (\cite{bouret}); (7) N\'aze et~al. (\cite{naze08b}); (8) Oskinova (\cite{oskinova}); and (9) Rauw et~al. (\cite{rauw02}). \end{table}