\begin{table}%T3
\par
\caption{\label{table:1}GJ~436b timing measurements.}               
        \small%\centerline
{
\begin{tabular}{c c c c}         
\hline
\hline                         
$T_{\rm C}$ (HJD) & $\sigma_{T_{\rm C}}$ (d) & Epoch & Reference \\     
\hline                                   
2454222.61612       & 0.00037 & 0   & (1)\\
2454225.26029       & 0.00038 & 1   & (1)$^a$\\
{\bf 2454238.47898} & {\bf 0.00040} & {\bf 6} & {\bf This work}\\
2454243.76657       & 0.00026 & 8   & (1)\\
2454246.40982       & 0.00040 & 9   & (1)\\
2454251.69956       & 0.00030 & 11  & (1)\\
2454280.78165       & 0.00017 & 22  & (2,3,4)$^b$\\
2454439.41607       & 0.00068 & 82  & (5)\\
2454444.70385       & 0.00093 & 84  & (5)\\
2454447.34757       & 0.00080 & 85  & (5)\\
2454463.20994       & 0.00089 & 91  & (5)\\
2454468.49911       & 0.00094 & 93  & (5)\\
2454505.51379       & 0.00050 & 107 & (6)\\
2454534.59584       & 0.00015 & 118 & (7)\\
2454558.39010       & 0.00063 & 127 & (6)\\
2454587.47447       & 0.00061 & 138 & (6)\\
\hline                                              
\end{tabular}}
\smallskip
References: (1)  \citet{shporer_etal08}; (2)  
\citet{gillon_etal07b}; (3)   \citet{deming_etal07}; (4) 
\citet{southworth08}; (5)   \citet{bean_and08}; (6)  
\citet{ribas_etal09}; (7)    \citet{alonso_etal08}.
\\
$^a$ Average of the two values given
  for this epoch.\\
  $^b$ Average of the three values given
  by different authors for this epoch, considering the correction
  given by Bean et~al. (2008).
\end{table}