\begin{table}%t9
\par
\caption{\label{M_dwarfs}Properties of active M~dwarfs observed with {\it Chandra} HETGS. X-ray luminosities are computed from the total background-subtracted counts contained in the MEG~spectra from 2--25~\AA. Values given in brackets correspond to the quiescent state.}
%\centerline
 {\begin{tabular}{lccccccccccc}
\hline\hline
Star		& Spectral& Distance&Age&$P_{\rm rot}$& ObsID	&\multicolumn{2}{c}{Exposure time}&\multicolumn{2}{c}{log $L_{{X}}$}&\multicolumn{2}{c}{log $L_{{X}}/L_{{\rm bol}}$}\\
		& Type	& [pc]& 
		[Myr]	& [d]		& &\multicolumn{2}{c}{[ks]}			&\\
\hline
YY Gem		& M~0.5&15.27	&370$ ^1$	& 0.814$ ^5$	&8504/8509		&136.0 &(81.5)	& 29.63 &(29.43)	&$-3.17$&($-3.37$)\\
AU Mic 		& M~1	& 9.94 	&12$ ^2$	& 4.865$ ^6$	&17 			&58.8 &(47.4)	& 29.19 &(29.13)	&$-3.48$&($-3.54$)\\
EQ Peg A	& M~3.5& 6.25 	&950$ ^3$	& (1.066$ ^7$)	& 8453/8484/8485/8486	&98.5 &(92.8)	& 28.71 &(28.67)	&$-3.19$&($-3.23$)\\
EV Lac 		& M~3.5& 5.05 	&45$ ^3$	& 4.376$ ^8$	& 1885			&100.0 &(87.3)	& 28.63 &(28.51)	&$-3.10$&($-3.22$)\\
AD Leo 		& M~4.5& 4.69 	&470$ ^3$	& 2.7/14$ ^{9,10}$& 2570			&45.2	&-- 	& 28.54&-- 		&$-3.36$&-- \\
EQ Peg B	& M~4.5& 6.25 	&950$ ^3$	& (1.066$ ^7$)	&8453/8484/8485/8486		&98.5	&-- 	& 27.89&-- 	&$-3.39$&-- \\
Proxima Cen 	& M~5.5& 1.30 	&5800$ ^4$	& 83.5$ ^{10}$	&2388 			&42.4 &(35.7)	& 26.85 &(26.60)	&$-3.96$&($-4.21$)\\
\hline
\end{tabular}}
\par
\smallskip
\par
$ ^1$ \citet{Torres_YY_gem}; $ ^2$ \citet{Zuckerman_beta_Pic_group}; $ ^3$ \citet{Parsamyan_ages}; $ ^4$ \citet{Yildiz_alpha_Cen}; $ ^5$ \citet{Kron_P_rot_YY_Gem}; $ ^6$ \citet{Torres_P_rot_AU_Mic}; $ ^7$ \citet{Norton_P_rot_EQ_Peg};  $ ^8$ \citet{Pettersen_P_rot_EV_Lac};  $ ^9$ \citet{Spiesman_P_rot_AD_Leo}; $ ^{10}$ \citet{Mahmoud_P_rot_AD_Leo}; $ ^{11}$ \citet{Benedict_P_rot_Proxima}.
\end{table}