\begin{table}
\caption[]{\label{tab:systems}Properties of well-studied main sequence binaries (e.g. footnote~9) with at least one 
component in the 0.80--1.10 $M_{\odot}$ mass interval.
}
 {
\begin{tabular}{lrrrrlllr} 
\hline\hline\noalign{\smallskip}
System       &Period &  $M/M_{\odot}$   & $R/R_{\odot}$    &$\log L/L_{\odot}$&
$v \sin i$$^a$
  & Variability    &Ca\,\itwo & $\log L_X$$^b$      \\
             &       &                 &                 &                 &   $(\kms)$ & (light curve)  &emission  & (cgs)\\
\hline\noalign{\smallskip}
Group 1:     &          &                 &                 &                &            &           &           &        \\
CG\,Cyg      & $0\fd63$ & $0.940\pm0.012$ & $0.890\pm0.013$ & $-0.26\pm0.06$ & 71(s)      & YES       &           &$<$$29.4$ \\ %I
             &          & $0.810\pm0.013$ & $0.840\pm0.014$ & $-0.51\pm0.03$ & 67(s)      &           &           &        \\
CV\,Boo      & $ 0\fd85$& $1.032\pm0.013$ & $1.262\pm0.023$ & $ 0.20\pm0.05$ &$73\pm10$   & YES       &           & 30.7   \\ %I
             &          & $0.968\pm0.012$ & $1.173\pm0.023$ & $ 0.11\pm0.05$ &$67\pm10$   &           &           &        \\
V636\,Cen    & $4\fd28$ & $1.052\pm0.005$ & $1.018\pm0.004$ & $ 0.05\pm0.03$ &$13.0\pm0.2$& YES       &  YES      & 30.0   \\ %I
             &          & $0.854\pm0.003$ & $0.830\pm0.004$ & $-0.41\pm0.04$ &$11.1\pm0.5$&           &  YES      &        \\
ZZ\,UMa      & $2\fd80$ & $1.142\pm0.007$ & $1.520\pm0.020$ & $ 0.42\pm0.02$ & 33(s)      & YES       &           &$<$$29.6$ \\ %I
             &          & $0.972\pm0.007$ & $1.160\pm0.010$ & $-0.03\pm0.03$ & 26(s)      &           &           &        \\
FL\,Lyr      & $2\fd18$ & $1.221\pm0.016$ & $1.282\pm0.028$ & $ 0.32\pm0.03$ &$30\pm2$    & ?/YES     &  NO       & 30.2   \\ %I
             &          & $0.960\pm0.012$ & $0.962\pm0.028$ & $-0.18\pm0.04$ &$25\pm2$    &           &  NO       &        \\
V1061\,Cyg   & $2\fd35$ & $1.282\pm0.015$ & $1.615\pm0.017$ & $ 0.53\pm0.03$ &$36\pm2$    & ?/YES     &           & 30.1   \\ %I
             &          & $0.932\pm0.007$ & $0.974\pm0.020$ & $-0.17\pm0.05$ &$20\pm3$    &           &           &        \\
\hline\noalign{\smallskip}
Group 2:     &          &                 &                 &                &            &           &           &        \\
HS\,Aur      & $9\fd85$ & $0.900\pm0.019$ & $1.004\pm0.024$ & $-0.13\pm0.03$ & 5(s)       & ?/YES     &  NO       &$<$$29.3$ \\ 
             &          & $0.879\pm0.017$ & $0.873\pm0.024$ & $-0.30\pm0.03$ & 5(s)       &           &  NO       &        \\
RW\,Lac      &$10\fd37$ & $0.928\pm0.006$ & $1.186\pm0.004$ & $ 0.14\pm0.03$ &$2\pm2$     & NO        &           &$<$$29.6$ \\
             &          & $0.870\pm0.004$ & $0.964\pm0.004$ & $-0.10\pm0.05$ &$0\pm2$     &           &           &        \\
$\alpha$\,Cen&79.9 yr   & $1.050\pm0.007$ & $1.224\pm0.003$ & $ 0.18\pm0.01$ & $2.7\pm0.7$& NO        &           &        \\   
             &          & $0.934\pm0.007$ & $0.863\pm0.005$ & $-0.30\pm0.02$ & $1.1\pm0.8$&           &           &        \\
V568\,Lyr    &$14\fd47$ & $1.074\pm0.008$ & $1.399\pm0.016$ & $ 0.26\pm0.03$ & 5(s)       & NO        &           &        \\
              &          & $0.827\pm0.004$ & $0.768\pm0.006$ & $-0.52\pm0.04$ & 3(s)       &           &           &        \\
\hline\noalign{\smallskip}
Exception:   &          &                 &                 &                &            &           &           &        \\
VZ\,Cep      & $1\fd18$ & $1.402\pm0.015$ & $1.534\pm0.012$ & $ 0.63\pm0.04$ &$57\pm3$    & NO        &           & 30.6   \\ %e
             &          & $1.108\pm0.008$ & $1.042\pm0.039$ & $ 0.03\pm0.05$ &$50\pm10$   &           &           &        \\
\hline
\end{tabular}}

\smallskip
$^a$ {If measured rotational velocities are not available, synchronous values (s) are given}.
$^b$ {X-ray luminosities are based on Voges 
et~al. (\cite{rosat99,rosat00}) and Motch et~al. (\cite{motch97}).}
\end{table}