\begin{table}%t3
%\centering
\par
\caption{Results of the spectral synthesis analysis of the Lyman-break galaxies.
Objects are identified by numbers adopted in this work, by Papovich and by
Williams (first three columns). For each source the table reports redshift,
total number of models analyzed, effective number of SSPs involved in the best
fit, stellar mass and~$\chi^2$ of best fit and~2$\sigma$ mass range due to
degeneracies. Last column summarizes the results of our simulated SIRTF/IRAC
observations of ly-break sources: IRAC will sample the restframe near-IR light
at $z\sim 2{-}3$, therefore significantly reducing the uncertainty on the
stellar mass estimate (see text for details).\label{tab:results_ly}}
\begin{tabular}{l c c c c c c c c c}
\hline
\hline
Obj & ID Pap. & ID Will. & $z$ & $N_{\rm tot}$ & $N_{\rm SSP}$ & $\chi^2_{\rm opt}$ & Mass (b.f.) & $\Delta M$ & $\Delta M_{\rm SIRTF}$\\
\# & (1) & (2) & (3) & mdls. & b.f. & b.f. & $[10^{11}~M_\odot]$ & $[10^{11}~M_\odot]$ & $[10^{11}~M_\odot]$ \\
\hline
Ly1 & 110 & 2-449.0 & 2.005 & 230403 & 3 & 5.13 & 0.21 & 0.16$-$2.47 & 0.27$-$0.55 \\
Ly2 & 503 & 2-903.0 & 2.233 & 195602 & 3 & 4.24 & 0.13 & 0.04$-$0.24 & 0.09$-$0.19 \\  
Ly3 & 67  & 2-82.1  & 2.267 & 195587 & 3 & 1.47 & 0.04 & 0.03$-$0.84 & 0.04$-$0.09 \\
Ly4 & 804 & 4-639.0 & 2.591 & 212778 & 2 & 10.99& 0.09 & 0.03$-$0.28 & 0.03$-$0.09 \\
Ly5 & 1352& 4-497.0 & 2.800 & 199203 & 3 & 5.87 & 0.02 & 0.02$-$0.29 & 0.02$-$0.06 \\
Ly6 & 1541& 4-363.0 & 2.980 & 217529 & 3 & 9.02 & 0.18 & 0.05$-$0.35 & 0.06$-$0.20 \\
Ly7 & 661 & 2-643.0 & 2.991 & 264435 & 2 & 7.54 & 0.04 & 0.02$-$0.13 & 0.03$-$0.06 \\
Ly8 & 273 & 2-76.11 & 3.160 & 278399 & 2 & 2.29 & 0.56 & 0.27$-$1.35 & 0.38$-$0.81 \\
\hline			    	  		\noalign{\smallskip}      
\multicolumn{10}{l}{(1): ID number in Papovich et~al. (\cite{Papovich01});}\\
\multicolumn{10}{l}{(2): ID number in Williams et~al. (\cite{Williams96});}\\
\multicolumn{10}{l}{(3): Spectroscopic redshifts by Steidel et al. (\cite{Steidel96}) and Lowental et~al. (\cite{Lowental97}).}
\end{tabular}
 \end{table}