\begin{table}%t1
%\centering
\par
\caption {\label{tab1}Summary of RSG candidates and their properties. 
{\it Top panel}:
  the core group of~15 {\it photometrically} selected stars 
regarded as prime cluster candidates; {\it second  panel}: likely cluster
members;  {\it third panel}: stars of interest, as defined in Sect.~2 and {\it fourth panel}: likely foreground
RSG identified by spectroscopy and included for completeness.
Note that based on spectroscopy, we also consider it likely that star~S16 is a cluster member and treat it as such in the text. Co-ordinates
and near-IR magnitudes are from 2MASS, with mid-IR ($\sim$5--25~$\mu$m)
magnitudes from the Galactic plane surveys of GLIMPSE/{\it Spitzer}
(Benjamin et~al. \cite{benjamin}) and the {\it Midcourse Source
  Experiment (MSX)}  (Egan et~al. \cite{egan}). We also 
provide the dereddened {\it MSX} $(A-C)$~colour (adopting the
prescription of Messineo et~al. \cite{maria}), which is 
 a diagnostic of emission from circumstellar dust (and hence proxy for
 mass loss) and the spectral type  of the stars, where available (Sect.~3).}
\begin{tabular}{lccccccccccccc}
\hline
\hline
ID & \multicolumn{2}{c}{Co-ordinates (J2000)}  & & 2MASS &  & GLIMPSE &  {\it
  Spitzer} & & & {\it MSX} & & & Spec. \\
   &      RA     &    Decln.  &   $J$ & $H$    & $K_{\rm s}$ &   5.8~$\mu$m  & 8.0~$\mu$m  &  A   &   C  &   D   &  E & (A-C)  &  type \\
\hline
S1 & 18 45 23.60 &--03 24 13.9 & 8.55& 6.54 &5.58  &  4.73 & 4.50 &  --   &   --  &   --   &  -- &   --    &     RSG \\
S2 & 18 45 26.54 &--03 23 35.3 & 8.53& 6.62 &5.75  &  4.92 & 4.63 & 4.30 & 3.39 &   --   &  -- &   --    &     M3~Ia \\
S3 & 18 45 24.34 &--03 22 42.1 & 8.54& 6.43 &5.35  &  4.19 & 4.14 &  --   &   --  &   --   &  -- &   --    &     M4~Ia \\
S4 & 18 45 25.31 &--03 23 01.1 & 8.42& 6.39 &5.31  &  4.08 & 4.04 & 3.97 & 3.12 &  3.21 &  -- &  0.85  &     M3~Ia \\
S5 & 18 45 23.26 &--03 23 44.1 & 8.51& 6.52 &5.52  &  4.45 & 4.20 & 3.78 & 2.82 &  3.15 &  -- &  0.96  &     M2~Ia \\
S6 & 18 45 19.39 &--03 24 48.3 & 9.06& 6.97 &6.04  &  5.24 & 5.20 & 4.71 &   --  &   --   &  -- &   --    &     RSG \\
S7 & 18 45 24.18 &--03 23 47.3 & 9.12& 7.10 &6.20  &  5.22 & 4.84 &  --   &   --  &   --   &  -- &   --    &     M0~Ia \\
S8 & 18 45 20.06 &--03 22 47.1 & 9.53& 7.29 &6.30  &  5.46 & 5.43 & 5.60 &   --  &   --   &  - &   --    &     K5~Ia \\
S9 & 18 45 28.13 &--03 22 54.6 & 9.34& 7.26 &6.29  &  5.49 & 5.44 &  --   &   --  &   --   &  -- &   --    &     M0~Ia \\
S10 & 18 45 16.56 &--03 23 45.1 & 9.65& 7.43 &6.43  &  5.57 & 5.52 & 5.45 &   --  &   --   &  -- &   --    &    M0~Ia \\
S11 & 18 45 26.31 &--03 20 03.3 & 9.18& 7.27 &6.46  &  5.77 & 5.78 & 5.87 &   --  &  --   &  -- &   --    &     RSG \\
S12 & 18 45 29.12 &--03 28 35.6 & 9.78& 7.86 &6.93  &  6.57 & 6.26 & 6.23 &   --  &   --   &  -- &   --    &      --  \\
S13 & 18 45 05.51 &--03 20 19.6 & 8.18& 5.97 &4.96  &    --  &  --   & 3.59 & 2.43 &  2.45 &  -- &  1.16  &     RSG \\
S14 & 18 45 29.02 &--03 22 37.4 & 9.51& 7.08 &5.89  &  4.79 & 4.61 & 4.43 &   --  &   --   &  -- &   --    &    RSG \\
S15 & 18 45 16.84 &--03 21 14.6 & 9.33& 6.92 &5.69  &  4.12 &   --  & 3.26 & 1.85 & 1.66  & 0.92 &1.41  &    RSG \\\hline
S16 & 18 45 20.87 &--03 27 59.6 & 9.32& 6.78 &5.53  &  4.34 & 4.15 & 3.79 & 2.93 & 2.97  & 2.22 &0.86  &    RSG \\
S17 & 18 45 38.45 &--03 23 18.1 &10.58& 7.07 &5.27  &   --  &  --  & 2.09 & 0.65 & 0.45  &--0.121 & 1.44&     -- \\ 
S18 & 18 45 38.65 &--03 21 03.9 &10.07& 7.62 &6.47  &  5.50 & 5.44 & 5.36 &   --  &   --   &  --    &--    &     -- \\
S19 & 18 45 37.05 &--03 19 35.1 &10.43& 7.81 &6.52  &  5.44 & 5.40 & 5.42 &   --  &   --   &  --    &--    &     -- \\
S20 & 18 45 16.64 &--03 22 33.2 &10.71& 8.28 &7.06  &  5.98 & 5.85 & 5.79 &   --  &   --   &  --    &--    &     -- \\
S21 & 18 45 11.81 &--03 18 43.1 &12.27& 8.30 &6.30  &  4.50 & 4.32 & 4.27 & 3.31 & 3.17  &  --    &0.96 &     -- \\
S22 & 18 45 12.69 &--03 23 30.7 &10.51& 8.04 &6.78  &  5.49 & 5.41 & 5.36 &   --  &  --    &  --    &--    &     -- \\\hline
S23 & 18 45 48.82 &--03 24 23.1 & 9.67& 7.36 &5.85  &    --  &  --   & 2.92 & 2.00 & 1.84  & 1.27  &0.92 &     -- \\
S24 & 18 45 50.34 &--03 24 21.8 &10.84& 8.08 &6.74  &    --  &  --   & --    & --    & --     & --     &--    &     -- \\
S25 & 18 45 45.61 &--03 20 42.8 &11.27& 8.43 &7.10  &  5.88 & 5.96 &  --   & --    & --     & --     &--    &     -- \\
S26 & 18 45 35.02 &--03 19 58.2 &11.43& 8.43 &6.96  &  5.42 & 5.21 &  --   &  --   &   --   & --     &  -- &     -- \\
S27 & 18 45 26.61 &--03 23 24.7 &11.26& 8.78 &7.46  &  6.01 & 5.81 &  --   &--    &--      & --     &--   &     -- \\\hline
S28 & 18 45 17.75 &--03 26 38.4 & 7.78& 6.14 &5.38  &  4.42 & 4.17 & 3.18 & 3.12 & --     & --     &1.19 & RSG   \\
\hline
\end{tabular}
\end{table}