\begin{table}%tD.3
\caption{\label{tab:bd17_sed_covmat}Covariance matrix of the uncertainties affecting the    synthetic instrumental magnitudes of~\bdtruc.}
 $$
    {\mathbf V}_{\rm SED_{BD +17}} = 10^{-6} \times \left(\begin{array}{lllllllll}
5.2760 &  1.1170 &  -2.0222  &  -6.1807 &   6.2336 &   6.0589 &  3.2774 &   0.6793 &  -3.2182 \\ 
       &  8.9793 &   7.8773  &   9.9974 &   2.3035 &   1.7390 &  3.6392 &   8.9824 &   8.3187 \\ 
       &         &   14.2570 &  23.3526 &  -3.5755 &  -2.5778 &  1.7173 &   8.8588 &  16.9508 \\ 
       &         &           &  46.0064 &  -9.7314 &  -7.8124 &  0.5591 &  11.9371 &  29.7526 \\ 
       &         &           &          &  11.0517 &   8.4008 &  3.6545 &   1.4931 &  -5.4785 \\ 
       &         &           &          &          &   7.5107 &  3.6710 &   1.1458 &  -4.1358 \\ 
       &         &           &          &          &          &  3.2572 &   3.4286 &   1.3518 \\ 
       &         &           &          &          &          &         &   9.1231 &   9.6018 \\ 
       &         &           &          &          &          &         &          &  20.7291 \\ 
    \end{array}\right)
\ \ \ \ \ \ 
  \begin{array}{l} 
    g_{\rm ref} \\
    r_{\rm ref} \\
    i_{\rm ref} \\
    z_{\rm ref} \\
    U_{\rm ref} \\
    B_{\rm ref} \\
    V_{\rm ref} \\
    R_{\rm ref} \\
    I_{\rm ref} \\
  \end{array}
$$
\end{table}