\begin{table}%t4
\caption{\label{tab:tabparamsIa}Average properties of the SN~Ia and SN~Ia$\star$ subsamples.}
\small%\centerline
{
 \begin{tabular}{lcccc}
\hline\hline
& $\langle z\rangle (\sigma_z)$ & $\langle \phi\rangle(\sigma_\phi)$ & $\langle c\rangle(\sigma_c)$ & $\langle x_1\rangle(\sigma_{x_1})$ \\ 
\hline 
SN~Ia & $0.60\pm 0.02$ (0.20) & $1.1\pm0.4$ (4.1) & $0.009\pm 0.013$ (0.12) & $-0.02\pm 0.09$ (0.9)\\
SN~Ia$\star$ & $0.70\pm 0.03$ (0.21) & $5.8\pm 1.1$ (7.1) & $0.05\pm 0.03$ (0.16) & $0.004\pm 0.18$ (1.1)\\ 
\hline
\noalign{\smallskip}
$\langle \gamma_1\rangle  (\sigma_{\gamma_1})$ & $m^c_B(\sigma_{m_B})$ & $f_{\rm gal}(\sigma_{f_{\rm gal}})$ & $\langle S/N\rangle^a$ & $\chi^2_\nu (\sigma_{\chi^2_\nu})$\\
\hline 
 $0.26\pm 0.11$ (1.1) & $23.95\pm 0.04$ (0.36)$^b$ & $0.32\pm 0.03$ 
(0.23) & $5.8\pm 0.6$ & 1.13 (0.30)$^c$\\
 $0.26\pm 0.29$ (1.9)  & $24.12\pm 0.08$ (0.50)$^b$ & $0.47\pm 0.05$ (0.28) & $1.8\pm 0.2$ & 1.03 (0.16)$^d$\\ 
\hline
\end{tabular}}
\smallskip
$^a$ Average signal-to-noise ratio per 5 $\AA$ pixel.\\
$^b$ Distance corrected magnitudes in the B band, using $\Omega_0=0.27$, 
$\Omega_\Lambda=0.73$ and $H_0=70$~km~s$^{-1}$~Mpc$^{-1}$.\\
$^c$ Excluding $\chi^2_\nu>2$ events (1.24 (0.49) with all events).\\
$^d$ Excluding $\chi^2_\nu>2$ events (1.46 (2.30) with all events).
\end{table}