\begin{table}%t3
\caption{ Fit characteristics of $\Sigma-D$ relations at 1 GHz
for SNRs in nearby galaxies.\label{tab3}}
%\centerline
 \begin{tabular}{ccc}
 \hline
  Galaxy&$\beta$&No. of SNRs\\
&(c.c.; f.q.)&(comments)\\\hline
M~31&$1.67\pm0.26$&30\\ 
&(--0.77;~60\%)\\
M~33&$1.77\pm0.20$&51\\ 
&(--0.79;~62\%)\\
LMC&$2.28\pm0.40$&25\\ 
&(--0.77;~59\%)\\
SMC&$2.28\pm0.52$&7\\ 
&(--0.89;~80\%)\\  
Galactic &$2.38\pm0.26$&36\\ 
(C\&B)
(--0.84;~71\%)&(excluding Cas A)\\ 
M~82&$3.41\pm0.24$&21\\ 
&(--0.95; 91\%)\\ 
"Master''\\  
&$3.20\pm0.11$&148\\
&(--0.92;~84\%) &(complete sample)\\ 
&$3.30\pm0.09$&145\\
&(--0.95;~89\%) &(excluding 3
HNRs)\\
\hline
\end{tabular}
\smallskip
Note: c.c. and f.q. represent the correlation coefficient and the
fit quality, respectively.
\end{table}