\begin{table}%t6
\caption{Summary of the properties of the massive YSOs. Columns 2--4:
  spectral lines ($-$: not present, $+$: present, $n$: not observed); Col. 5: is the source the counterpart of a radio
  UCHII?; Col.~6: spectral evidence for a
  circumstellar disk. ($+$: evidence for a disk); Col.~7: spectral type estimated based on the
  position in the CMD (Fig.~\ref{fig:cmd}); Col.~8: spectral type
  based on the IRAS luminosity of the IRAS source. This is an upper
  limit on the spectral type of the massive YSO, as usually more stars
  contribute to the IRAS flux. Column 9: spectral type estimate based
  on other methods. Column 10: properties of the surrounding cluster,
  taken from \citet{Kaper06}. The OB star spectra are discussed in
  \citet{Ostarspec05}. References: K94: \citet[ radio flux UCHII
  region]{Kurtz94}; P03: \citet[ mid-infrared luminosity]{Persi03};
  Kpc: Kurtz, private communication (radio flux UCHII region); N84:
  \citet[ optical spectroscopy]{Neckel84}; C00: \citet[ \brg\
  absorption, similarity with Be stars]{Clark00}; C87: \citet[ single
  dish radio observations and assuming that a single star is
  responsible for the ionisation]{Caswell87}; G02: \citet{Gomez02};
  B03: \citet{Barbosa03}; K01: \citet{Karnik01}. \label{tab:summary}}
%\centering
\small\begin{tabular}{lllllllllp{4.5cm}}
\multicolumn{1}{c}{(1)} & \multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)} & \multicolumn{1}{c}{(4)}&\multicolumn{1}{c}{(5)}&\multicolumn{1}{c}{(6)}    &\multicolumn{1}{c}{(7)} &\multicolumn{1}{c}{(8)}    &\multicolumn{1}{c}{(9)}    &\multicolumn{1}{c}{(10)}\\\hline\hline
\multicolumn{1}{c}{Object} & \multicolumn{1}{c}{CO}&\multicolumn{1}{c}{\ion{Mg}{II}/} & \multicolumn{1}{c}{Pf}&\multicolumn{1}{c}{UCHII}          &\multicolumn{1}{c}{Disk}    &\multicolumn{1}{c}{near-IR} &\multicolumn{1}{c}{IRAS}    &\multicolumn{1}{c}{Other}    &\multicolumn{1}{c}{Cluster}\\
                           &                       &\multicolumn{1}{c}{\ion{Fe}{II}}     & \multicolumn{1}{c}{}     &\multicolumn{1}{c}{} &\multicolumn{1}{c}{}& \multicolumn{1}{c}{Sp. type}&\multicolumn{1}{c}{Sp. type}&\multicolumn{1}{c}{Sp. type} &\multicolumn{1}{c}{Properties}\\ \hline
\object{06058nr227} &  n   & $-$  & n    & $-$ &    & B?      & B1V   &               &Cluster member, B1-B2V star found in same cluster. \\ 
\object{06058nr221} &  n   & $-$  & n    & $-$ & +  & late B  & B1V   &               &See \object{06058nr227}. \\ 
\object{06061nr676} &  n   & $-$  & n    & +   &    & B?      & B1V   & B2V (K94)     &Cluster member, B1-B2V star found in same cluster, central source UCHII region.\\   
\object{06084nr118} &  n   & +    & n    & +   &    & mid-B   & B1.5V & $>$B3 (P03)   &Cluster member (\object{GGD 14}), negative radio slope (G02). Red mid-IR SED (P03). \\ 
\object{06084nr114} &  n   & $-$  & n    & $-$ &    & mid-B   & B1.5V &               &Cluster member.\\ 
\object{06412nr121} &  $-$ & +    & +    & +   & +  & mid-O   & O9.5V & O8V (Kpc)     &Nebular \hei\ emission, ionising\\
                    &      &      &      &     &    &         &       & O7V (N84)     & source UCHII; brightest source. \\  
\object{07299nr598} &  $-$ & $-$  & $-$  & $-$ &    & B2V     & B2V   & late B (C00)  &Likely not related to IRAS source, Be star. \\ 
\object{07299nr618} &  +   & $-$  & $-$  & $-$ & +  & mid-B   & B2V   &               &Scattered light of more embedded source? \\ 
\object{07299nr43}  &  +   & +    & $-$  & $-$ &    & mid-B   & B2V   &               &Blended with \object{07299nr43}. \\ 
\object{07299nr314} &  $-$ & +    & $-$  & $-$ &    & B?      & B2V   &               &Deeply embedded. \\ 
\object{08576nr292} &  +   & $-$  & $-$  & $-$ & +  & mid-B   & B1V   &               &Located at edge of the cluster, 2 O9V-B1V stars in center. \\ 
\object{08576nr408} &  $-$ & $-$  & $-$  & $-$ &    & early-B & B1V   &               &See \object{08576nr292}. \\ 
\object{11097nr1218}&  +   & $-$  & $-$  & $-$ & +  & early-B & O6V   &               &Located in cluster, not main ionising source, peak of radio emission even more embedded. \\ 
\object{11097nr693} &  $-$ & $-$  & $-$  & $-$ &    & late-O  & O6V   &               &Blue mid-IR SED (B03), located close to \object{11097nr1218}. \\ 
\object{15411nr1955}&  $-$ & +    & +    & n   & +  & mid-O   & O8V   &               &Nebular \hei\ emission, main ionising source \ion{H}{ii} region. No radio observations available. \\ 
\object{16164nr3636}&  +   & +    & +    & n   & +  & mid-O   & O6V   & $>$O4V (C87)  &Main ionising source very compact \ion{H}{ii} region (3.5\arcsec); nebular \hei\ emission, embedded in massive envelope (K01). \\ 
\object{16571nr1281}&  $-$ & $-$  & +    & $-$ & +  & early-B & B0.5V & $>$O9V (C87)  &Cluster member, next to O8V-B1V star. \\ 
\object{17136nr649} &  $-$ & $-$  & $-$  & $-$ &    & late-O  & O8V   &               &In center of small cluster (GM24), next to UCHII region \\ 
\object{17258nr593} &  $-$ & +    & $-$  & $-$ &    & early-B & O8V   &               & \\ 
\object{18006nr766} &  +   & $-$  & +    & $-$ & +  & mid-B   & O9.5V &               &Located in M8, next to the ionising source \object{Her 36} (O7V).  \\ 
\object{18507nr248} &  $-$ & $-$  & $-$  & $-$ &   & late-O  & O5.5V &                &Located in cluster, also O5-O6 V star detected \\ \hline
\end{tabular}
\par
\end{table}