\begin{table}%ta1
      \caption{\label{table.hrirosatourxrayparameters}X-ray parameters of faint HRI/{\em ROSAT} sources in $\sigma$~Orionis not listed by Caballero et~al. (2009)\tablefootmark{a}.} 
      %%\centerline
\par
{\small   
\par
         \begin{tabular}{l c ccccc}
            \hline
            \hline
            \noalign{\smallskip}
No.	& Name			& $N$	& $\overline{CR}$	& $\sigma_{CR}$	& $\overline{\delta CR}$	& $\chi^2$	\\
	& 			& 	& [ks$^{-1}$]		& [ks$^{-1}$]	& [ks$^{-1}$]			&		\\
            \noalign{\smallskip}
            \hline
            \noalign{\smallskip}
4	& Mayrit 348349		& 11	& 11.46			& 10.03		& 1.95				& 114.6		\\ % 
16	& Mayrit 97212		& 11	& 3.66			& 0.95		& 1.22				& 0.361		\\ % 
18	& Mayrit 403090		& 16	& 5.07			& 1.75		& 1.58				& 4.663		\\ % 
27	& Mayrit 489165		& 6	& 2.77			& 1.68		& 1.24				& 2.176		\\ % 
29	& Mayrit 92149 AB	& 6	& 3.24			& 1.01		& 0.77				& 1.540		\\ % 
31	& [W96] 4771--1056	& 6	& 3.76			& 1.00		& 1.09				& 1.126		\\ % 
32	& Mayrit 374056		& 13	& 5.61			& 1.88		& 1.88				& 4.617		\\ % 
37	& Mayrit 102101~AB	& 7	& 7.77			& 4.86		& 1.77				& 45.91		\\ % 
            \hline
         \end{tabular}}
\tablefoot{\tablefoottext{a}{Number of associated X-ray events, mean and standard deviation of 
	the net count rate, mean of the error on the count rate, and normalised
	double-weighted $\chi^2$ of the X-ray series (see Table~1 in Caballero
	et~al. 2009).}}  
   \end{table}