\begin{table}%t3
%\centering
\par
  \caption{Spectra acquired  by different investigators  with the NASA
  RELAB facility at  Brown University. This table lists  the number of
  RELAB OC meteorites used from different Principal Investigators. \label{tab3}}
\begin{tabular}{c l r}
\hline\hline
PI code & PI full name & Spectra used \\
\hline
CMP & Carl\'e M. Pieters & 85 \\
DTB & Dan Britt          & 12 \\
FPF & Fraser P. Fanale   & 25 \\
JFB & Jeffery F. Bell    & 4  \\
LAM & Lucy Ann McFadden  & 5  \\
MJG & Michael J. Gaffey  & 39 \\
TXH & Takahiro Hiroi     & 14 \\
\hline
Total &                  & 184\\
\hline
\end{tabular}
\end{table}