\begin{table}%t1
\caption{\label{tab:res_fits_all}Best-fit models of edge-on differentially rotating discs. The parameters \Dv~= 0.432~\kms\ and $D~\Omega_{\rm s0}$~= 0.064~\kmsmas\ are determined directly from the data and are common to all models. The distance to the source $D$~=~2.7~kpc.}
\small%%\centerline

 {
\begin{tabular}{ccccccccc}
\hline\hline
%&&&&&&&& \\[-8pt]
$\alpha$$^a$ & $p$$^a$ &$\gamma$$^a$ &
  $r_1$$^a$    & $X$$^a$  & $\Omega_1$$^b$ & $\v_1$$^b$ &
  \ri, \ro$^c$     & \mi, \mo$^d$                   \\
        &     &        & [mas (AU)]  & [\%] & [\kmsmas]  & [\kms] &                   & [\Mo]                        \\
\hline
%&&&&&&&& \\[-8pt]
  +0.7  &  4  &  0.005 & 0.2\  (0.5) & 4.45 &    0.213   &   0.04 & 10$^{-7}$, 409.3 & $1.4\times 10^{-23}$, 1.7   \\
  +0.6  &  4  &  0.007 & 0.4\  (1.1) & 3.58 &    0.239   &   0.1  & $10^{-7}$, 233.4 & $5.1\times 10^{-21}$, 2.1   \\
  +0.5  &  4  &  0.009 & 0.8\  (2.1) & 2.81 &    0.255   &   0.2  & 10$^{-7}$, 158.1 & $9.6\times 10^{-18}$, 2.4   \\
  +0.4  &  4  &  0.01  & 1.1\  (2.9) & 2.70 &    0.279   &   0.3  & 10$^{-7}$, 135.3 & $7.4\times 10^{-17}$, 2.0   \\
  +0.3  &  6  &  0.005 & 14 \  (39)  & 2.92 &    0.110   &   1.6  & 10$^{-7}$, 18.5  & $7.2\times 10^{-13}$, 12.1  \\
  +0.2  &  6  &  0.01  & 18 \  (50)  & 3.06 &    0.086   &   1.6  & 10$^{-7}$, 12.1  & $2.3\times 10^{-11}$, 4.8   \\
  +0.1  &  6  &  0.05  & 32 \  (88)  & 3.07 &    0.055   &   1.8  & 10$^{-7}$, 5.4   & $1.3\times 10^{-9}$, 2.4   \\
   0    &  6  &  0.2   & 45 \  (123) & 3.09 &    0.044   &   2.0  & 10$^{-7}$, 3.2   & $5.5\times 10^{-8}$, 1.8   \\
 $-$0.1 &  6  &  0.3   & 49 \  (133) & 3.09 &    0.040   &   2.0  & 10$^{-7}$, 2.8   & $1.5\times 10^{-6}$, 1.4   \\
 $-$0.2 &  6  &  0.5   & 57 \  (153) & 3.08 &    0.039   &   2.2  &      0.07, 2.4   &          0.2, 1.4   \\
 $-$0.3 &  6  &  0.7   & 63 \  (171) & 3.07 &    0.038   &   2.4  &      0.07, 2.2   &          0.4, 1.5   \\
 $-$0.4 &  8  &  0.9   & 90 \  (242) & 3.04 &    0.035   &   3.1  &      0.07, 1.7   &          1.5, 2.9   \\
 $-$0.5 &  10 &  1.0   & 110\  (298) & 2.99 &    0.032   &   3.5  &      0.07, 1.5   &          4.1                 \\
\hline
 $-$0.5 &  12 &  1.0   & 160\  (431) & 3.04 &    0.031   &   4.9  &      0.07, 1.5   &          12                  \\
 $-$0.5 &  12 &  1.0   & 220\  (594) & 3.07 &    0.031   &   6.8  &      0.07, 1.5   &          31                  \\
 $-$0.5 &  12 &  1.0   & 440\ (1187) & 3.09 &    0.031   &   13.5 &      0.07, 1.5   &         245                  \\
 $-$0.5 &  12 &  1.0   &1000\ (2700) & 3.09 &    0.031   &   30.8 &      0.07, 1.5   &        2881                  \\
\hline
\end{tabular}}
\medskip
\par
$^a$ The free parameters $\alpha$, $p$, $\gamma$ and $r_1$ are determined from fits that minimise~$X$, the error average over the entire central feature in the \pv\ (Eq.~(\ref{eq:x})). \\
$^b$ Equation~(\ref{eq:omegas_app}) determines $\Omega_1$, the angular velocity at $r_1$, and $\v_1 = \Omega_1 r_1$ is the corresponding rotational velocity.  \\
$^c$ Inner and outer radii (in multiples of $r_1$) where the maser absorption coefficient drops to~5\% of the maximum.  \\
$^d$ Dynamical masses enclosed in $\rho_{\rm in}$ and $\rho_{\rm out}$ (Eq.~(\ref{eq:mass_gen})). Note that $\rho_{\rm in} = \rho_{\rm out}$ for Keplerian rotation, and the lower part of the table lists additional solutions for this case with progressively increasing central mass. 
\end{table}