\begin{table}%t4
\caption{\label{tab:mdot}Overview of the outburst duration, fluency and estimated long-term averaged accretion rates of the seven transients detected during the \textit{Swift}/GC monitoring campaign of 2006 and 2007.}
\small%\centerline
 {
\begin{tabular}{l l l l l l}
\hline
\hline
%&&&&& \\[-8pt]
Source & Year &  $t_{{\rm ob}}$$^a$ & \~{F }$^b$ & $\langle \dot{M}\rangle _{{\rm NS}}$$^c$ & $\langle \dot{M} \rangle _{{\rm BH}}$$^d$ \\
\hline
%&&&&& \\[-8pt]
AX J1745.6-2901$^e$ & 2006 & $>$$16$ &$\ga$$1.8 \times 10^{-4}$ &  &  \\
 & 2007 & $>$$78$ &$\ga$$6.5 \times 10^{-3}$ &  $\sim$$(5{-}15) \times 10^{-11}$ &   \\
CXOGC J174553.5-290124 & 2006 & $>$$12$ &$\ga$$1.6 \times 10^{-5}$ & $\sim$$(5{-}13) \times 10^{-13}$ & $\sim$$(7{-}18) \times 10^{-14}$ \\
CXOGC J174540.0-290005  & 2006 & 2 & $1.3\times 10^{-5}$ & $\sim$$(3{-}15) \times 10^{-13}$ & $\sim$$(4{-}21) \times 10^{-14}$ \\
Swift J174553.7-290347 & 2006 & 2 & $8.0\times 10^{-6}$ &$\la$$1 \times 10^{-12}$ & $\la$$2 \times 10^{-13}$ \\
Swift J174622.1-290634 & 2006 &  5 & $5.0\times 10^{-6}$ & $\la$$4 \times 10^{-13}$ &  $\la$$6 \times 10^{-14}$\\
GRS 1741.9-2853$^e$ & 2006 & 1 & $2.6 \times 10^{-6}$ &  &  \\
 & 2007 & $>$$13$ & $\ga$$1.4 \times 10^{-3}$ & $\sim$$(2{-}8) \times 10^{-11}$ &  \\
XMM J174457-2850.3 & 2007 & $<$$12$ & $\la$$7.5 \times 10^{-4}$ &  $\sim$$(1{-}10) \times 10^{-11}$ &  $\sim$$(2{-}20) \times 10^{-12}$\\
\hline
\end{tabular}}
\medskip
$^a$ Outburst duration in weeks.
$^b$ Outburst fluency in units of ${\rm erg~cm}^{-2}$ in the 2-10 keV energy band, which was calculated by multiplying the mean unabsorbed outburst flux by the outburst duration.
$^c$ Estimated long-term averaged accretion rate (${\rm M}_{\odot}~{\rm yr}^{-1}$) for a neutron star with $M=1.4~{\rm M_{\odot}}$ and $R=10~{\rm km}$
$^d$ Estimated long-term averaged accretion rate (${\rm M}_{\odot}~{\rm yr}^{-1}$) for a black hole with $M=10~{\rm M_{\odot}}$ and $R=30~{\rm km}$.
$^e$ AX J1745.6-2901 and GRS 1741.9-2853 both display type-I X-ray bursts and are thus confirmed neutron star systems.
\end{table}