\begin{table}%t1
\par
\caption {\label{methods}Instruments and methods used in the complementary observations of the IRa01 candidates.  }
%\centerline
 {\begin{tabular}{lllll}
\hline\hline
Instrument & Diam Tel & Nb Nights$^a$ &Method & Measurement$^b$\\
\hline
INT/WFC & 2.5 & 5 &photometry & pre-launch spectral typing, astrometry\\
IAC80 & 0.8 & 0.5 &photometry & on-target transit confirmation\\
EulerCam& 1.2 &3 &photometry & on-target transit confirmation\\
Wise/0.46 & 0.46& 3& photometry & on-target transit confirmation\\
Wise/1.0 & 1.0& 3& photometry & on-target transit confirmation\\
CFHT/Megacam & 3.6 & 1.5 &photometry & on-target transit confirmation\\
\hline
CORALIE&1.2 & 1 & radial velocity & SB identification\\
SOPHIE& 1.93& 7&radial velocity & SB identification,\\
            &     &&            & mass characterization \\
HARPS&3.6 & 5& radial velocity &  SB identification, stellar parameters\\
            &     &&            & mass characterization \\
\hline
UVES& 8.0 & 0.5 & spectroscopy & stellar parameters\\
\hline
\end{tabular}}
\par
\smallskip
$^a$  {The approximate number of nights per instrument is given as an indication of the observational effort needed for the follow-up of a single CoRoT field.}
$^b$  {SB stands for spectroscopic binary.}
\end{table}