\begin{table}%t2
%\centering
\par
\caption{Results of the observations.}
\label{table2-center}
\small
\begin{tabular}{ccccccccc}
\hline \hline
 Position& Offsets & Line & $T_{{\rm mb}}$ & Velocity & Width & $I_{{\rm CO}}$ & $M_{{\rm gas}}$  & $T_{21}$/$T_{10}$ \\
 & [\textit{$'' \times ''$}] & & [mK] & [km~s$^{-1}$] & [km~s$^{-1}$] & [K~km~s$^{-1}$] & [10$^8~M_\odot$]&\\
\hline
centre1& [0, 0] & CO(1--0) & $15.2 \pm 4.2$ &--$70.2 \pm 22.8$ & $333 \pm 69.1$ & $5.4 \pm 0.8$ & 12.6 & \\
centre1& [0, 0] & CO(2--1) & $76 \pm 4.6$ &--$25 \pm 4.8$ & $301 \pm 11.5$ & $24.3 \pm 0.8$ & & \\
centre1& [0, 0] & CO(2--1) & $26.7 \pm 1.6$ &--$41.2 \pm 4.5$ & $277.9 \pm 10.9$ & $7.9 \pm 0.26$ & & 1.7\\
%\hline
centre2& [--11, 3] & CO(1--0) & $26.7 \pm 5.6$ & --$74.8 \pm 16.4$ & $238.6 \pm 41.3$ & $6.8 \pm 0.9$ & 15.8 & \\
centre2& [--11, 3] & CO(2--1) & $83.7 \pm 17.2$ & --$99.7 \pm 14.8$ & $231.7 \pm 34.6$ & $20.6 \pm 2.6$ & & \\
centre2& [--11, 3] & CO(2--1) & $31.1 \pm 1.2$ &--$63.8 \pm 2.9$ & $257.6 \pm 6.7$ & $8.5 \pm 0.2$ & & 1.2\\
%\hline
centre3& [11, --3] & CO(1--0) & $10.3 \pm 5.1$ &--$60.4 \pm 81.2$ & $340.3 \pm 216.2$ & $3.7 \pm 1.4$ & 8.7 & \\
centre3& [11, --3] & CO(2--1) & $29.7 \pm 10.2$ & $9.4  \pm 29.1$ & $340.2 \pm 69.2$ & $10.7 \pm 1.9$ & & \\
centre3& [11, --3] & CO(2--1) & $16 \pm 1.3$ & --$45.1 \pm 5.9$ & $248.4 \pm 15.4$ & $4.2 \pm 0.2$ & & 1.6\\
%\hline
centre4& [3, 11] & CO(1--0) & $26.4 \pm 8.4$ & --$36.9 \pm 13.4$ & $83.1 \pm 29.6$ & $2.3 \pm 0.8$ & 5.4 & \\
centre4& [3, 11] & CO(2--1) & $18.7 \pm 12.2$ & --$61.5 \pm 60.7$ & $320.4 \pm 97.8$ & $6.4 \pm 2.0$ & & \\
centre4& [3, 11] & CO(2--1) & $17 \pm 1.1$ & --$44.7 \pm 4.9$ & $271.2 \pm 12.1$ & $4.9 \pm 0.2$ & & 0.6\\
%\hline
centre5& [--8, 14] & CO(1--0) & $22.9 \pm 7.6$ &--$74.5 \pm 20.4$ &$167.5 \pm 43.3$ &$4.1 \pm 1.0$ & 9.5 & \\
centre5& [--8, 14] & CO(2--1) & $33.2 \pm 10.1$ &--$76 \pm  21.6$ & $246 \pm 50$ & $8.7 \pm 1.5$ & & \\
centre5& [--8, 14] & CO(2--1) & $23.8 \pm 0.6$ &--$61.3 \pm 1.7 $&$248.2 \pm 4.2$ &$6.3 \pm 0.1$ & & 1.0\\
%\hline
centre6& [--21, 6] & CO(1--0) & $23.4 \pm 4.3$ &--$87.4 \pm 11.5$ &$191.3 \pm31.9$ &$4.7 \pm 0.6$ & 11.1 & \\
centre6& [--21, 6] & CO(2--1) & --$14.8 \pm 12.2$ &$165.9 \pm 68$ &$247.3 \pm 162.8$ &--$3.9 \pm 2.0$ & & \\
centre6& [--21, 6] & CO(2--1) & $24 \pm 1.1$ &--$65.4 \pm 3.1$ &$246.7 \pm 7.1$ &$6.3 \pm 0.2 $& & 1\\
%\hline
centre7& [--3, --11] & CO(1--0) & $10  \pm  8.2$ &--$34.9 \pm 79.2$ &$441.4 \pm 209.8$ &$4.7 \pm 1.8$ & 11 & \\
centre7& [--3, --11] & CO(2--1) & $32.4 \pm 7.6 $&--$164.8 \pm 12.8 $&$117 \pm 39.8$ &$4.0 \pm 1.0$ & & \\
centre7& [--3, --11] & CO(2--1) & $15.5 \pm 1.1$ &--$32.7 \pm 5.6$ &$277.4 \pm 13.8$ &$4.5 \pm 0.2$ & & 1.6\\
%\hline
centre8& [--18, 17] & CO(1--0) & 14.1 $\pm$ 2.2 &-82.9 $\pm$ 8.5 &142.8 $\pm$ 16.2 &2.1 $\pm$ 0.2 & 5 & \\
centre8& [--18, 17] & CO(2--1) & --$28.2 \pm 6.2$ &$121.1 \pm 14.5$ &$47.6 \pm 28.2$ &--$1.4 \pm 0.5$ & & \\
centre8& [--18, 17] & CO(2--1) & $21.1 \pm 1.1$ &--$56.1 \pm 3.5$  & $241.4 \pm 8.2$ & $5.4 \pm 0.2$ & & 1.5\\
%\hline
centre9& [--24, --5] & CO(1--0) & $16.2 \pm 5.6$ &--$149.5 \pm 16.3$ &$114.3 \pm 36.4$ &$2.0 \pm 0.6$ & 4.6 & \\
centre9& [--24, --5] & CO(2--1) & --$48.9 \pm 18.4$ &$55.2 \pm 15.4 $&$63.7 \pm 33.1$ &--$3.3 \pm 1.4$ & & \\
centre9& [--24, --5] & CO(2--1) & $12.4 \pm 1.0$ &--$64.2 \pm 5.9$ &$275.1 \pm 14.3$ &$3.6 \pm 0.2$ & & 0.8\\
\hline
\end{tabular}
\end{table}