\begin{table}%t1
\caption{\label{tab:table1}The five bright NS LMXBs studied in this paper.}
%\centering
\par
\begin{tabular}{cccc}
\hline\hline \noalign{\smallskip}
Source &  $D$\tablefootmark{a} & $N_{\rm H}$\tablefootmark{b} & pointings \#  \\[2pt]
\hline
Z sources &	\\
GX~5--1   & 7.2& 2.8 &  137   \\
GX~349$+$2   &9.2 & 0.77 &  51    \\ 
\hline
Atoll sources &\\
GX~13$+$1 & 7& 3.2 &  35   \\
GX~3$+$1& 5 &1.66  &  166   \\
GX~9$+$1& 5 & 0.8 &  87 \\
\hline  
\end{tabular}       
\tablebib{References for distance and $N_{\rm H}$: \cite{grimm02} and \cite{ueda05} (GX~5--1), \cite{grimm02} and \cite{iaria04b} (GX~349$+$2), \cite{bandyopadhyay99} and \cite{ueda04} (GX~13$+$1), \cite{kuulkers00} and \cite{chevenez06} (GX~3$+$1), \cite{iaria05} (GX~9$+$1).
\tablefoot{\tablefoottext{a}{The distance is in kpc;}
\tablefoottext{b}{in units of $10^{22}$~cm$^{-2}$.}}}
\end{table}