\begin{table}%t1	
\caption{\label{onc_targets}ONC target stars, observing log, and target properties$^1$.}		
%%\centerline

{\begin{tabular}{rcccccclcccc}
\hline\hline
Star & Obs. Dates & Instrument & Exp. time & $S/N$ & $I$  & $V-I$ &  
Sp. Type &  $T_{\rm eff}$ & $\Delta$($I-K$) & $P$ & $v_{\rm rad}$\\
(H97)&            &   & (sec)    &     &      &    &  & (K) & (mag) & (days) &
(km~s$^{-1}$)\\
(1) & (2) & (3) & (4) & (5) & (6) & (7) & (8) & (9) & (10) & (11) & (12)\\
 \hline
 223a &  15-02-04 & UVES, CD4 & $3\times3600$  & 70   & 13.64 & 2.42 & K5   & 4395 & 0.48 & -- & $25.43\pm 1.58$\\
 268 &  15-02-04 & UVES, CD4 &  $3\times3600$  & 95   & 12.88 & 1.61 & K5-K6  & 4197 & 0.16 & 9.81 & $27.80 \pm 1.02$\\ 
 278 &  15-02-04 & UVES, CD4 &  $3\times3600$  & 70   & 13.66 & 1.94 &  K2-K7e  & 4395 & 1.69 & 6.76 & $24.58 \pm 1.49$\\
 487 &  15-02-04 & UVES, CD4 &  $3\times3600$  & 105   & 12.79 & 1.78 & K6     & 4197 & 0.28 & -- & $29.27 \pm 0.87$\\
 673 &  15-02-04 & UVES, CD4 &  $3\times3600$  & 110   & 13.07 & 1.83 & K5 & 4395 & 0.81 & 1.44 &  $24.53 \pm 1.29$\\
 683 &  15-02-04 & UVES, CD4 &  $3\times3600$  & 130   & 11.76 & 1.85 & K6    & 4197 & 0.28 & 11.50 &  $25.73\pm 1.51$\\
 907 &  15-11-04 & UVES, CD4 &  $4\times2600$  & 125   & 12.77 & 1.60 & K1-K4  & 4775 & --& -- &  $20.82\pm 1.24$\\ \hline
 664 &  15-02-04  & GIRAFFE & $3\times3600$  & 150   & 14.05 & 2.88 & K5.5-K7 & 4197 & $-0.18$ & 7.20 & $25.36 \pm 1.18$\\
1020 &  15-02-04  & GIRAFFE & $3\times3600$  & 200   & 12.65 & 1.40 & K6     & 4197  & $-0.01$ & -- & $27.60 \pm 1.82$\\
 \hline 
\end{tabular}}
\footnotemark[1]{
Identifier~(1),
$I$, $V-I$, spectral-types (6, 7, 8), and $T_{\rm eff}$ values (9
-- from spectral-types using the scale of Kenyon \& Hartmann \cite{kh95}) 
come from Hillenbrand (\cite{hil97}); 
$K$-band excess (10) and rotational periods~(11) were taken from 
Hillenbrand et al. (\cite{hil98}) and Herbst et~al.~(\cite{her02}),
respectively. Radial velocities
(12) were measured from our spectra.}
\end{table}