\begin{table}%t5
%\centering
\par
\caption {\label{Tab:X}Properties of the 11 M giants detected as  X-ray sources by the ROSAT
all-sky survey \citep[following][]{Hunsch98}, where for three stars, the X-ray source is offset by more than 1\arcmin\ from the M~giant optical position.}
\par
\begin{tabular}{rrlll}
\hline\hline
HR & HD & Name & Sp. Typ. & Binary? \\ 
\hline
750 & 16~058 & 15 Tri     &M3 III & SB\\ 
2216& 42~995 &$\eta$  Gem &M3 III & ORB + visual GV comp.\\
3013& 62~898 &$\pi$   Gem &M1 III & X-ray offset\\
4765& 108~907& 4 Dra      &M4 III & ORB\\
5512& 130~144& -- &M5 IIIab & Vr constant?\\
5589& 132~813& RR UMi &M4.5 III & ORB -- X-ray offset \\
6200& 150~450& 42 Her &M2.5 IIIab &\\
6374& 155~035& -- &M1-2 III & X-ray offset\\
6406& 156~014&  $\alpha^1$ Her &M5 Ib-II & visual GV companion\\
7547& 187~372& -- &M1 III & ORB \\
8992& 222~800& R Aqr &M7 IIIpe & SB (symbiotic)\\
\hline
\end{tabular}
\end{table}