\begin{table}%t4
%\centering
\par
\caption{Characteristics of the considered
processes of~$\nu$ emission and numerical values used in the
limits calculation.\label{tb4}}
\begin{tabular}{c c c }
\hline\hline
 Process & "Cooling'' & "Accretion''
\\ \hline
Emitted flavors & $\nu_i \bar\nu_i $ & $\bar\nu_{\rm e},\nu_{\rm e} $ \\
Energy spectrum & thermal & non thermal\\
$T_{\bar \nu_{\rm e}}$ & $1\div10$ MeV & $1\div10$ MeV \\
$k = T_{\nu_x}/T_{\bar \nu_{\rm e}}$ & $1.3\div1.5$ & -- \\
$f_{\nu_{\rm e}} \equiv f_{\bar\nu_{\rm e}}$ & $1/6$ & $1/2$ \\
$f_{\nu_x}$  & $1/6$ & $0$ \\
\hline
\end{tabular}
\end{table}