\begin{table}%t2
\caption{\label{t2}Parameters of the observed continuum sources shown in Figs.~1 and~2.}
%\centerline
{
\begin{tabular}{cccccccr}
\hline\hline
\noalign{\smallskip}
Name & $\alpha$ & $\delta$ & $F_{\rm peak}$ & $T_{\rm SB}$ & $\Theta_{\rm HP}$\tablefootmark{a} & $\Theta_{\rm S}$\tablefootmark{a}  & $S_{\rm \nu}$ \\
       & (J2000) &  (J2000)  & (mJy beam$^{-1}$) & (K) & ($\arcsec$) &  ($\arcsec$) & (mJy) \\
\hline
\multicolumn{8}{c}{\HII\ regions spatially coincident with H$_2$O masers} \\
G32.74--0.07  & 18:51:21.86 & --00:12:06.2 &  38 &  66 & $\sim$1.0 & $\le$0.3 &    42.7 \\
G35.03+0.35B & 18:54:00.65 & +02:01:19.4 &   4 &   8 & $\sim$1.1 & $\le$0.4 &     4.4 \\
G35.20--0.74  & 18:58:13.02 & +01:40:36.1 &   2 &   4 & 1.2 & 0.7 &     3.0 \\
\hline
\multicolumn{8}{c}{\HII\ regions not associated with H$_2$O masers} \\
G12.22--0.12  & 18:12:39.71 & --18:24:20.7 &  60 &  84 & 5.7 & 5.5 &   210.0 \\
G31.28+0.06  & 18:48:11.93 & --01:26:28.7 &   6 &  11 & 5.8 & 5.7 &   234.0 \\
G31.24--0.11  & 18:48:45.02 & --01:33:10.6 &  92 & 177 & 4.6 & 4.5 &   606.8 \\
G31.21--0.18  & 18:48:56.64 & --01:36:43.0 &   9 &  12 & $\sim$1.0 & $\le$0.3 &    9.9 \\
G35.03+0.35A & 18:54:00.49 & +02:01:18.3 &  13 &  26 & $\sim$1.0 & $\le$0.3 &    13.6 \\
G35.20--1.74A & 19:01:46.51 & +01:13:24.8 & 234 & 505 & 2.5 & 2.2 &  2351.9 \\
G35.20--1.74B & 19:01:46.62 & +01:13:35.5 &  25 &  53 & 3.6 & 3.5 &   198.3 \\
G43.89--0.38  & 19:14:26.18 & +09:22:34.1 &  67 & 127 & 7.0 & 6.9 &   429.8 \\
G48.61+0.02  & 19:20:31.18 & +13:55:23.4 &  18 &  27 & 1.5 & 0.9 &    29.4 \\
G50.32+0.68  & 19:21:27.52 & +15:44:20.9 &  34 &  42 & 4.2 & 3.9 &    71.5 \\
G75.78+0.34  & 20:21:44.10 & +37:26:39.5 &   2 &   4 & 1.7 & 0.5 &    19.1 \\
\hline
\end{tabular}}
\par
\tablefoot{\tablefoottext{a}{When the ammonia cores are not spatially resolved, $\Theta_{\rm HP}$ is a measure of the HPBWs of the
NH$_3$(2, 2) and (3, 3) maps, whereas we arbitrarily assume about one third of the synthesized beam as an upper limit (used to derive the parameters listed in the table) on $\Theta_{\rm S}$ (see text).}}
\end{table}