\begin{table}%t4
%\centering
\par
\caption{Mass and age of the new T Tauri stars.\label{massage}}
\begin{tabular}{cccc}
\hline \hline
No & GSC & Mass & Age\\
 & name & ($M_{\odot}$) & (Myr)\\
\hline
4c1 & 0450001478 & 1.6 & 2\\
4c2 &  & 0.8 & 15\\
5c1 & 0450001549 & 0.6 & 1\\
5c2 &  & 0.4 & 1\\
19 & 0458901101 & 1.6 & 6\\
20 & 0445900083 & 1.6 & 4\\
28 & 0458601090 & 1.0 & 25\\
34 & 0460801986 & 0.7 & 3\\
36c1 & 0427200174 & 0.9 & 20\\
36c2 &  & 0.2 & 0.2\\
37c1 & 0448000917 & 1.0 & 0.4\\
38 & 0460400743 & 1.2 & 8\\
40 & 0460502733 & 1.4 & 6\\
41 & 0460500268 & 0.8 & 7\\
43c1 & 0448900036 & 0.3 & 4\\
43c2 &  & 0.7 & 3\\
44 & 0460500170 & 1.0 & 2\\
45 & 0447900348 & 0.9 & 25\\
46 & 0461001318 & 1.3 & 6\\ 
\hline
\end{tabular}
\end{table}