\begin{table}%t3
 %\centering
\par
 \caption{\label{table_astropar}
 Parameters of our best-fit LTE models of cyanic acid and isocyanic acid.}
 \vspace*{0.0ex}
 \begin{tabular}{lcrrcrrrrcrrr}
 \hline\hline\noalign{\smallskip}
  & & \multicolumn{5}{c}{HOCN} & & \multicolumn{4}{c}{HNCO} & \\ 
 \multicolumn{1}{c}{Source\tablefootmark{a}} & \multicolumn{1}{c}{$V_{{\rm lsr}}$} & \multicolumn{1}{c}{Size\tablefootmark{b}} & \multicolumn{1}{c}{$T_{{\rm rot}}$} & \multicolumn{1}{c}{$N$\tablefootmark{c}\hspace*{-1.5mm}$_{{\rm HOCN}}$} & \multicolumn{1}{c}{{\it FWHM}} & \multicolumn{1}{c}{$V$\tablefootmark{d}\hspace*{-1.5mm}$_{{\rm off}}$} & &  \multicolumn{1}{c}{$T_{{\rm rot}}$} & \multicolumn{1}{c}{$N$\tablefootmark{e}\hspace*{-1.5mm}$_{{\rm HNCO}}$} & \multicolumn{1}{c}{{\it FWHM}} & \multicolumn{1}{c}{$V$\tablefootmark{d}\hspace*{-1.5mm}$_{{\rm off}}$} & \multicolumn{1}{c}{$R$\tablefootmark{f}} \\ 
  & \multicolumn{1}{c}{\scriptsize (km~s$^{-1}$)} & \multicolumn{1}{c}{\scriptsize ($^{\prime\prime}$)} & \multicolumn{1}{c}{\scriptsize (K)} & \multicolumn{1}{c}{\scriptsize (cm$^{-2}$)} & \multicolumn{1}{c}{\scriptsize (km~s$^{-1}$)} & \multicolumn{1}{c}{\scriptsize (km~s$^{-1}$)} & & \multicolumn{1}{c}{\scriptsize (K)} & \multicolumn{1}{c}{\scriptsize (cm$^{-2}$)} & \multicolumn{1}{c}{\scriptsize (km~s$^{-1}$)} & \multicolumn{1}{c}{\scriptsize (km~s$^{-1}$)} & \\ 
 \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}{(9)} & \multicolumn{1}{c}{(10)} & \multicolumn{1}{c}{(11)} & \multicolumn{1}{c}{(12)} & \multicolumn{1}{c}{(13)} \\ 
 \hline\noalign{\smallskip}
  Sgr~B2(M)        & 62 & 60.0 &   $12^{\rm +8}_{-3}$ &   $7.5^{\rm +3.5}_{-1.5}  \times 10^{12}$ & 14.0 & 0.0  & &   $12^{\rm +3}_{-2}$ & $  1.7^{\rm +1.3}_{-0.7} \times 10^{15}$ & 14.0 & 1.0 &  $230^{\rm +270}_{-140}$ \\  
                   &    & 3.0  &  $100^{\rm +60}_{-60}$ & $  7.0^{\rm +8.0}_{-4.0} \times 10^{14}$ & 12.0 & 0.0  & &  [100] & $  6.0 \times 10^{16}$ & 12.0 & 1.0 &   $90^{\rm +110}_{-50}$ \\ 
  SgrB2~(N)        & 64 & 60.0 &   [14] & $  7.0^{\rm +1.0}_{-2.0} \times 10^{12}$ & 9.0 & 0.0   & &   $14^{\rm +6}_{-4}$ & $  1.7^{\rm +1.3}_{-0.7} \times 10^{15}$ & 9.0 & $-$1.0 & $ 240^{\rm +360}_{-115}$ \\  
                   &    & 60.0 &   [14] & $  9.0^{\rm +2.0}_{-1.0} \times 10^{12}$ & 12.0 & 11.0 & &   $14^{\rm +6}_{-4}$ & $  1.2^{\rm +2.8}_{-0.2} \times 10^{15}$ & 12.0 & 14.0 &  $130^{\rm +370}_{-40}$ \\  
                   &    & 2.4  &  [200] & $  3.0 \times 10^{15}$ & 7.0 & 0.0   & &  [200] & $  1.3 \times 10^{18}$ & 7.0 & --1.0 &  430 \\  
                   &    & 1.9  &  [200] & $  3.7 \times 10^{15}$ & 7.0 & 10.0  & &  [200] & $  8.0 \times 10^{17}$ & 7.0 & 9.0 &  220 \\  
  Sgr~B2(S)        & 61 & 60.0 &    $7^{\rm +5}_{-5}$ & $  4.2^{\rm +1.0}_{-3.0} \times 10^{13}$ & 17.0 & --2.0 & &   23 & $1.8 \times 10^{15}$$^g$ &  $\cdots$    &   $\cdots$   &  $43^{\rm +107}_{-8}$ \\
 (20$^{\prime\prime}$,~100$^{\prime\prime}$)  & 68 & 60.0 &    $9^{\rm +4}_{-2}$ & $  5.0^{\rm +2.0}_{-2.0} \times 10^{12}$ & 8.0 & 11.0  & &  $14^{\rm +2}_{-1}$ & $  8.0^{\rm +4.0}_{-3.0} \times 10^{14}$ & 8.0 & 11.0 &  $160^{\rm +240}_{-90}$ \\  
                   &    & 60.0 &    $9^{\rm +1}_{-1.5}$ & $  1.2^{\rm +0.2}_{-0.2} \times 10^{13}$ & 7.0 & 3.0    & &  $14^{\rm +2}_{-2}$ & $  2.0^{\rm +1.0}_{-0.5} \times 10^{15}$ & 7.0 & 3.0 &  $170^{\rm +130}_{-63}$ \\  
                   &    & 60.0 &    $9^{\rm +4}_{-2}$ & $  9.0^{\rm +1.0}_{-1.0} \times 10^{12}$ & 8.0 & --5.0   & &  $14^{\rm +2}_{-2}$ & $  1.9^{\rm +1.4}_{-0.5} \times 10^{15}$ & 8.0 & --5.0 &  $210^{\rm +228}_{-70}$ \\  
 (--40$^{\prime\prime}$,~0$^{\prime\prime}$)   & 54 & 60.0 &   [28] & $  9.5^{\rm +3.5}_{-2.5} \times 10^{12}$ & 12.0 & 2.5   &  & $28^{\rm +2}_{-4}$ & $  2.1^{\rm +0.3}_{-0.3} \times 10^{15}$ & 12.0 & 2.5 &  $220^{\rm +123}_{-20}$ \\  
                   &    & 60.0 &   [15] & $  7.0^{+2.0}_{-2.0} \times 10^{12}$ & 12.0 & 18.2 &  &  $15^{\rm +3}_{-2}$ & $  2.7^{\rm +1.0}_{-0.7} \times 10^{15}$ & 12.0 & 18.2 &  $350^{\rm +8}_{-168}$ \\  
 (20$^{\prime\prime}$,~$-$180$^{\prime\prime}$) & 50 & 60.0 &   [15] & $  7.0^{\rm +2.0}_{-2.0} \times 10^{12}$ & 14.0 & 0.0  & &  15 & $  1.4 \times 10^{15}$$^g$ &  $\cdots$  &  $\cdots$  & $200^{\rm +80}_{-44}$  \\
 \hline
 \end{tabular}
 \tablefoot{
 \tablefoottext{a}{The offsets are given with respect to Sgr~B2(M).}
 \tablefoottext{b}{Source diameter ({\it FWHM}). The size of the compact sources was derived from the modeling of HNCO. The size of the extended sources was fixed to 60$^{\prime\prime}$.}
 \tablefoottext{c}{Column density of cyanic acid.}
 \tablefoottext{d}{Velocity offset with respect to the systemic velocity of the source given in Col.~(2).}
 \tablefoottext{e}{Column density of isocyanic acid.}
 \tablefoottext{f}{Column density ratio [HNCO]/[HOCN].}
 \tablefoottext{g}{Column density values in \cite{MRM2008} were multiplied by 1.4 to account for beam efficiencies and beam filling factors.} } 
 \end{table}