\begin{table}%tA.3 \caption{\label{thco}Gaussian fit to HCO$^{+}$(1--0) spectra at peak coordinates\tablefootmark{\ast}.} \par %\centering \par \begin{tabular}{lcccc} \hline \hline \noalign{\smallskip} Source & $V_{\rm LSR}$ & $\it FWHM$ & $T_{\rm MB}$ & $\int T_{\rm MB} {\rm d}V$ \\ & (km~s$^{-1}$) & (km~s$^{-1}$) & (K) & (K~km~s$^{-1}$) \\ \hline 05358+3543\tablefootmark{a} & --16.0 (0.1) & 3.7 (0.1) & 11.2 (0.6) & 44.1 (0.5)\\ G213.61--12.6 & 9.2 (0.1) & 1.9 (0.1) & 8.8 (0.5) & 18.0 (0.4)\\ G189.78+0.34 & 9.2 (0.1) & 3.8 (0.1) & 8.4 (0.4) & 34.0 (0.3)\\ G192.58-0.04 & 8.9 (0.1) & 3.2 (0.1) & 10.4 (0.3) & 35.5 (0.6)\\ G192.60--0.05 & 7.8 (0.1) & 4.2 (0.1) & 7.1 (0.2) & 31.7 (0.5)\\ 18151--1208\_2 & 30.0 (0.1) & 3.6 (0.1) & 10.2 (0.2) & 38.9 (0.5)\\ 18151--1208\_3 & 30.7 (0.1) & 2.2 (0.1) & 6.5 (0.2) & 15.0 (0.4)\\ 18151--1208\_1 & 33.2 (0.1) & 2.8 (0.1) & 12.6 (0.3) & 37.9 (0.5)\\ G18.15--0.28 & 55.6 (0.1) & 4.9 (0.1) & 4.5 (0.5) & 23.7 (0.4)\\ G18.18--0.30 & 49.5 (0.1) & 5.1 (0.2) & 3.9 (0.2) & 20.9 (0.6)\\ 18223--1243\tablefootmark{a} & 45.4 (0.1) & 4.4 (0.2) & 4.5 (0.2) & 20.9 (0.7)\\ 18228--1312\tablefootmark{a} & 32.9 (0.1) & 4.8 (0.1) & 9.2 (0.3) & 46.6 (0.9)\\ G19.27+0.1M2\tablefootmark{b} & 25.1 (0.7) & 9.9 (1.7) & 0.4 (0.2) & 4.4 (0.6)\\ G19.27+0.1M1 & 29.4 (0.2) & 4.6 (0.6) & 0.8 (0.2) & 4.0 (0.4)\\ 18236--1205\tablefootmark{a,b} & 26.6 (0.4) & 13.2 (1.1) & 1.3 (0.2) & 17.7 (1.2)\\ 18264--1152 & 43.6 (0.1) & 4.6 (0.1) & 13.0 (0.6) & 63.9 (0.1)\\ G23.60+0.0M1\tablefootmark{a} & 106.9 (0.1) & 5.2 (0.1) & 4.4 (0.1) & 24.4 (0.5)\\ 18316--0602\tablefootmark{a} & 43.3 (0.1) & 10.2 (0.2) & 4.6 (0.3) & 49.7 (0.8)\\ G23.60+0.0M2\tablefootmark{a,b} & 54.0 (0.6) & 8.7 (1.1) & 0.9 (0.2) & 8.1 (1.1)\\ 18317--0513 & 41.9 (0.0) & 2.2 (0.0) & 9.4 (0.2) & 21.5 (0.3)\\ G24.08+0.0M2 & 51.9 (0.1) & 2.6 (0.3) & 2.1 (0.4) & 5.9 (0.5)\\ G24.33+0.1M1 & 112.0 (0.1) & 4.2 (0.4) & 1.4 (0.1) & 6.3 (0.4)\\ G24.33+0.1M4 & 118.2 (0.2) & 3.5 (0.6) & 0.9 (0.2) & 3.4 (0.5)\\ G24.33+0.1M2\tablefootmark{a} & 117.9 (0.2) & 6.9 (0.7) & 1.7 (0.2) & 12.4 (1.6)\\ G24.60+0.1M2 & 114.9 (0.2) & 4.5 (0.4) & 1.7 (0.3) & 8.3 (0.6)\\ G24.60+0.1M1\tablefootmark{a} & 52.9 (0.1) & 5.0 (0.1) & 5.2 (0.2) & 27.7 (1.3)\\ G25.04--0.2M1\tablefootmark{a} & 63.7 (0.1) & 4.6 (0.2) & 3.7 (0.2) & 18.4 (0.9)\\ G25.04--0.2M4\tablefootmark{a} & 63.6 (0.1) & 4.1 (0.4) & 3.2 (0.3) & 14.1 (1.4)\\ G25.04--0.2M2\tablefootmark{a} & 63.8 (0.1) & 4.6 (0.3) & 2.6 (0.2) & 12.6 (0.7)\\ G28.28--0.35\tablefootmark{a} & 48.4 (0.2) & 7.4 (0.5) & 1.8 (0.2) & 14.5 (0.9)\\ 18507+0121\tablefootmark{a} & 59.6 (0.2) & 8.2 (0.4) & 3.2 (0.3) & 27.9 (1.8)\\ G34.43+0.2M1\tablefootmark{a} & 59.0 (0.2) & 6.1 (0.3) & 3.6 (0.3) & 23.4 (1.2)\\ G34.43+0.2M3 & 60.7 (0.1) & 4.0 (0.2) & 4.6 (0.3) & 19.5 (0.6)\\ G34.24+0.13\tablefootmark{a} & 56.6 (0.1) & 2.5 (0.1) & 5.6 (0.2) & 14.8 (0.5)\\ 18517+0437 & 43.9 (0.1) & 3.6 (0.1) & 12.3 (0.3) & 46.8 (0.6)\\ G34.77--0.6M2\tablefootmark{c} & 44.1 (0.1) & 2.7 (0.3) & 10.4 (1.6) & 29.4 (2.7)\\ G35.39--0.3M4 & 42.9 (0.1) & 2.1 (0.2) & 2.7 (0.1) & 6.1 (0.5)\\ G38.95--0.5M1\tablefootmark{a} & 42.3 (0.1) & 3.6 (0.1) & 4.9 (0.3) & 18.7 (0.7)\\ 19035+0641 & 32.4 (0.1) & 3.6 (0.1) & 3.4 (0.3) & 12.9 (0.4)\\ 19095+0930\tablefootmark{a} & 44.0 (0.1) & 6.9 (0.1) & 6.0 (0.4) & 44.1 (0.7)\\ 20216+4107 & --1.6 (0.0) & 2.4 (0.1) & 5.9 (0.2) & 15.1 (0.3)\\ 20332+4124 & --3.1 (0.1) & 3.1 (0.1) & 3.4 (0.1) & 11.2 (0.4)\\ 22134+5834\tablefootmark{a} & --18.2 (0.1) & 3.3 (0.2) & 2.9 (0.2) & 10.1 (0.4)\\ 22570+5912\_2 & --48.2 (0.0) & 2.5 (0.1) & 4.5 (0.2) & 12.2 (0.4)\\ 22570+5912\_1 & --45.6 (0.0) & 2.8 (0.1) & 3.9 (0.2) & 11.5 (0.3)\\ 23033+5951 & --53.2 (0.0) & 4.3 (0.1) & 9.0 (0.2) & 40.9 (0.5)\\ 23139+5939 & --44.6 (0.1) & 5.0 (0.1) & 4.6 (0.3) & 24.0 (0.5)\\ 23151+5912 & --54.6 (0.1) & 3.9 (0.3) & 1.4 (0.1) & 5.9 (0.4)\\ \hline \end{tabular} \tablefoot {\tablefoottext{\ast}{The errors are indicated in brackets;} \tablefoottext{a}{self-absorption masked (see text);} \tablefoottext{b}{bad fit due to noisy spectrum or considerable self-absorption;} \tablefoottext{c}{fit to spectrum at offset coordinates ($-$13.3$''$,~$-$9.0$''$) arcsec (see HCO$^{+}$(1--0) and HCN(1--0) integrated maps in Fig.~\ref{fclump1}).}} \end{table}