\begin{table}%t2
  %\centering
\par
  \caption{Specific parameter values for different models.}
  \label{tab2}
    \begin{tabular}{lll}
  \hline\hline
   Parameter [units] & corona  & jet \\
 \hline\noalign{\smallskip}
Accretion rate [$M_{\odot}$/yr] & $1.2\times10^{-8}$ & $2\times10^{-8}$ \\
Corona luminosity [erg~s$^{-1}$] & $3.5\times10^{37}$ & $10^{35}$ \\
$q_{\rm jet/accr}$ & 0.04 & 0.2 \\
Shock dissipation efficiency & 0.1 & 0.7 \\
Acceleration efficiency & 0.1 & 0.002 \\
Electron power-law index & 2.2 & 1.7 \\
Equipartition parameter & 0.1 & 0.3 \\
  \hline
  \end{tabular}
  \end{table}