\begin{table}%t1
%\centering
\par
 \caption{List of Main Belt asteroids considered in the
   present work.  Column
2 indicates the origin of  data used to  obtain spectra in the entire
 range   until 2.4~\mum. s1:   SMASSI  data; s2: SMASSII data;  sIR:
 SMASSIR data; 52c: 52-color data (see text for details).\label{tab1} } 
\begin{tabular}{r l c r r r}
\hline\hline
Number & Reference & Spectral range & Slope & $\lambda_{\rm BI}$ & BII/BI \\
\hline
    3  & s2+sIR+52c & 0.44--2.46  &  0.164 & 0.940 &  0.512 \\
    5  & s2+sIR+52c & 0.44--2.46  &  0.256 & 0.910 &  0.568 \\
    6  & s2+sIR+52c & 0.44--2.51  &  0.248 & 0.930 &  0.475 \\
    7  & s2+sIR+52c & 0.44--2.56  &  0.332 & 0.940 &  0.268 \\
   11  & s2+sIR+52c & 0.44--2.56  &  0.262 & 0.980 &  0.385 \\
   12  & s2+sIR+52c & 0.44--2.46  &  0.274 & 1.140 &  0.196 \\
   15  & s2+sIR+52c & 0.44--2.41  &  0.227 & 1.000 &  0.137 \\
   18  & s2+sIR+52c & 0.44--2.56  &  0.309 & 0.900 &  0.340 \\
   20  & s2+sIR+52c & 0.44--2.51  &  0.164 & 0.920 &  0.967 \\
   25  & s2+sIR+52c & 0.44--2.56  &  0.513 & 0.952 &  0.294 \\
   26  & s2+sIR+52c & 0.44--2.46  &  0.209 & 0.974 &  0.226 \\
   27      & s2+52c & 0.44--2.51  &  0.237 & 0.960 &  0.473 \\
   29  & s2+sIR+52c & 0.44--2.56  &  0.216 & 0.980 &  0.623 \\
   32  & s2+sIR+52c & 0.44--2.41  &  0.206 & 0.910 &  0.263 \\
   33  & s2+sIR+52c & 0.44--2.56  &  0.164 & 0.910 &  0.674 \\
   37  & s2+sIR+52c & 0.44--2.51  &  0.400 & 0.910 &  0.947 \\
   39  & s2+sIR+52c & 0.44--2.46  &  0.147 & 1.050 &  0.345 \\
   40  & s2+sIR+52c & 0.44--2.56  &  0.148 & 0.930 &  0.401 \\
   42  & s2+sIR+52c & 0.44--2.56  &  0.241 & 1.060 &  0.009 \\
   43  & s2+sIR+52c & 0.44--2.56  &  0.324 & 0.980 &  0.291 \\
   57  & s2+sIR+52c & 0.44--2.51  &  0.342 & 0.920 &  0.892 \\
   63  & s2+sIR+52c & 0.44--2.51  &  0.539 & 0.930 &  0.376 \\
   67      & s2+52c & 0.44--2.46  &  0.176 & 0.930 &  0.574 \\
   68  & s1+sIR+52c & 0.47--2.56  &  0.263 & 1.040 &  0.209 \\
   80  & s2+sIR+52c & 0.44--2.51  &  0.410 & 0.940 &  0.231 \\
   82  & s2+sIR+52c & 0.44--2.46  &  0.027 & 0.910 &  1.108 \\
   89      & s2+52c & 0.44--2.46  &  0.274 & 1.030 &  0.364 \\
  101      & s2+52c & 0.44--2.51  &  0.181 & 0.930 &  0.748 \\
  103      & s2+52c & 0.44--2.51  &  0.167 & 0.930 &  0.433 \\
  113  & s2+sIR+52c & 0.44--2.46  &  0.256 & 1.020 &  0.026 \\
  115      & s2+52c & 0.44--2.56  &  0.254 & 0.950 &  0.393 \\
  116      & s2+52c & 0.44--2.56  &  0.185 & 0.890 &  0.657 \\
  138      & s1+52c & 0.49--2.51  &  0.209 & 1.010 &  0.090 \\
  152      & s2+52c & 0.44--2.51  &  0.279 & 0.920 &  0.934 \\
  218      & s1+52c & 0.47--2.56  &  0.249 & 0.980 &  0.908 \\
%  221  & s2+sIR+52c & 0.44-2.46  &        &       &        \\
%  233      & s2+52c & 0.44-2.51  &        &       &        \\
%  235      & s1+52c & 0.45-2.46  &        &       &        \\
  246  & s2+sIR+52c & 0.44--2.56  &  0.555 & 1.100 &  0.247 \\
  258      & s2+52c & 0.44--2.46  &  0.165 & 0.910 &  0.709 \\
  264      & s2+52c & 0.44--2.51  &  0.181 & 0.930 &  0.374 \\
  289  & s2+sIR+52c & 0.44--2.46  &  0.882 & 1.100 &  0.007 \\
  346  & s2+sIR+52c & 0.44--2.56  &  0.346 & 0.950 &  0.327 \\
  349  & s2+sIR+52c & 0.44--2.51  &  0.472 & 0.940 &  0.696 \\
%  352  & s2+sIR+52c & 0.44-2.46  &        &       &        \\
  354  & s2+sIR+52c & 0.44--2.46  &  0.594 & 1.080 &  0.033 \\
  376      & s2+52c & 0.44--2.46  &  0.349 & 0.960 &  0.468 \\
  387      & s2+52c & 0.44--2.51  &  0.179 & 1.050 &  3.992 \\
  389  & s2+sIR+52c & 0.44--2.41  &  0.219 & 0.900 &  0.619 \\
  446  & s2+sIR+52c & 0.44--2.41  &  0.826 & 1.090 &  0.055 \\
  532      & s2+52c & 0.44--2.41  &  0.265 & 0.960 &  0.158 \\
  584  & s2+sIR+52c & 0.44--2.51  &  0.571 & 0.970 &  0.433 \\
%  639      & s1+52c & 0.50-2.46  &        &       &        \\
  653  & s2+sIR+52c & 0.44--2.46  & --0.082 & 1.060 &  0.825 \\
%  661  & s2+sIR+52c & 0.44-2.46  &        &       &        \\
  674      & s2+52c & 0.44--2.41  &  0.177 & 0.910 &  0.830 \\
  863  & s2+sIR+52c & 0.44--2.41  &  1.118 & 1.090 &  0.060 \\
  980  & s2+sIR+52c & 0.44--2.51  &  0.109 & 1.000 &  0.389 \\
% 1056      & s2+52c & 0.44-2.46  &        &       &        \\
\hline                
%%
\end{tabular}
\end{table}