\begin{table}%t4
   %\centering
\par
   \caption{Comparison between different calibrations for colors and temperatures
              of late type main sequence stars.  
              $a$: Bessell  (\cite{Bessell1990});
              $b$: Bessell  (\cite{Bessell1995}); 
              $c$: Straizys (1992); 
              $d$: Bertone et al. (\cite{Bertone2004}) using Kurucz spectra;
              $e$: Bertone et al. (\cite{Bertone2004}) using Phoenix spectra; 
              $f$: Drilling \& Landolt (\cite{Drilling2000});
              $g$: Straizys \& Kuriliene (\cite{Straizys1981}).
              }
   \includegraphics[width=7.8cm,clip]{2490Tab4.ps}  
   \label{tab4}
  \end{table}