\begin{table}%t1
\caption{\label{sample}The sample: coordinates used for the observations, distance, bolometric luminosity, ionising photon rate, methanol maser detection and outflow detection.}
\par
%\centerline
 {
\begin{tabular}{cccccccccc}
\hline\hline
Source & $\alpha$ (2000) & $\delta$ (2000) & $d$ & $d_{\rm gal}$$^{\rm \dag}$ & $L_{{\rm bol}}$$^{\rm \ddag}$ & $N_{{\rm Ly}}$ & CH$_3$OH masers?$^{\rm \star}$ & H$_2$O masers? & Outflow?\\
 & (h m s) & (\degr~\arcmin~\arcsec) & (kpc) & (kpc) & $(10^4~L_{\odot})$ & ($10^{47}$ s$^{-1}$) & (Y/N) & (Y/N) & (Y/N)\\
\hline
\object{G10.47$+$0.03} & 18 08 38.22 & $-$19 51 49.7 & 10.8$^{a}$ & 2.9 & 140$^{f}$ & 28$^{k}$ & Y & Y$^{b}$ & Y\\
\object{G10.62$-$0.38} & 18 10 28.70 & $-$19 55 49.7 & 6.5$^{b}$ & 2.4 & 110$^{g}$ & 91$^{l}$ & Y & Y$^{b}$ & Y\\
\object{G16.59$-$0.06} & 18 21 09.16 & $-$14 31 48.8 & 4.7$^{c}$ & 4.2 & 2.3$^{g}$ & 0.26$^{m}$ & Y & Y$^{d}$ & Y\\
\object{G19.61$-$0.23} & 18 27 38.15 & $-$11 56 38.5 & 12$^{a}$ & 4.9 & 170$^{g}$ & 49$^{l}$ & N & Y$^{b}$ & Y\\
\object{G23.44$-$0.18} & 18 34 39.25 & $-$08 31 38.8 & 7.8$^{d}$ & 3.4 & 57$^{g}$ & $<$0.02$^{n}$ & N & Y$^{d}$ & ?\\
\object{G28.87$+$0.06} & 18 43 46.24 & $-$03 35 30.4 & 8.5$^{d}$ & 4.2 & 29$^{g}$ & 0.13$^{m}$ & Y? & Y$^{d}$ & Y\\
\object{G29.96$-$0.02} & 18 46 03.96 & $-$02 39 21.5 & 9$^{e}$ & 4.5 & 190$^{g}$ & 31$^{k}$ & Y & Y$^{b}$ & ?\\
\object{G35.20$-$0.74} & 18 58 12.98 & $+$01 40 37.6 & 2.3$^{d}$ & 6.8 & 2.1$^{h}$ & 0.02$^{n}$ & Y? & Y$^{d}$ & Y\\
\object{G43.89$-$0.78} & 19 14 26.16 & $+$09 22 34.0 & 4.2$^{b}$ & 6.2 & 4.0$^{f}$ & 9.1$^{l}$ & Y? & Y$^{b}$ & Y\\
\object{G48.61$+$0.02} & 19 20 31.19 & $+$13 55 24.9 & 11.8$^{d}$ & 8.9 & 130$^{i}$ & 4.4$^{n}$ & -- & Y$^{d}$ & Y\\
\object{G75.78$+$0.34} & 20 21 44.10 & $+$37 26 39.5 & 4.1$^{b}$ & 8.5 & 24$^{j}$ & 3.9$^{l}$ & Y? & Y$^{b}$ & Y\\
\hline
\end{tabular}}
\medskip
\par
 $^{\dag}$ Galactocentric distance.  $^{\ddag}$ Luminosities and ionising photon rates corrected for revised distances.    $^{\star}$ Pestalozzi et~al. (\cite{pestalozzi05}). Sources with ``?'' have only single-dish observations; ``--'' denotes no observations towards that source.\\
References: $^{a}$ Pandian et~al. (\cite{pandian08}), $^{b}$ Hofner \& Churchwell (\cite{hofner96}), $^{c}$ Codella et~al. (\cite{codella97}),
$^{d}$ Forster \& Caswell (\cite{forster99}),
$^{e}$ Hanson et~al. (\cite{hanson02}), $^{f}$ Hatchell et~al. (\cite{hatchell00}), $^{g}$ Walsh et~al. (\cite{walsh97}), $^{h}$ Fuller et~al. (\cite{fuller01}), $^{i}$ Kurtz et~al. (\cite{kurtz94}), $^{j}$ Klaassen \& Wilson (\cite{klaassen07}), $^{k} $Cesaroni et~al. (\cite{cesa94}), $^{l}$~Wood \& Churchwell (\cite{wood89}), $^{m}$  Cesaroni (priv. comm.), $^{n}$ Codella (priv. comm.).
\end{table}