\begin{table}%t2
\caption{\label{tab1}List of telescopes and instruments involved in the
multisite campaign. SCP means Single Channel Photometer; TCP means
Three Channel Photometer. To give an idea of the relative photometric
precision of each site, the last column shows the white noise in the
Fourier space (amplitude) for each site. All the calculations are in
the $V$~filter except for Loiano (2002) and SARA sites for which we have
only $B$~filter data.}
%\centering
\par
\begin{tabular}{lccc}
\hline\hline
Observatory  & Telescope & Instrument & Noise \\
& & & (mmag)\\
\hline
Loiano (Italy)    & 1.5~m  &  BFOSC - 2002  & 0.2 \\
Loiano (Italy)    & 1.5~m  &  TTCP - 2003  & 0.2 \\
BAO (China)       & 0.85~m &  TCP & 0.4 \\
SPM (Mexico) & 1.5~m  & $uvby$ Phot. & 0.6\\
SARA (USA)  & 0.9~m  & CCD  &  1.5 \\
Teide (Spain)     & 1.0~m OGS &  CCD   & 0.6 \\
Fairborn (USA)    & 0.75~m T6 & SCP  & 0.8 \\
OSN (Spain) & 0.9~m &  $uvby$ Phot.  & 0.6\\
Serra la Nave (Italy) & 0.9~m & SCP & 1.3 \\
SOAO (Korea)         & 0.6~m & CCD  & 0.7 \\ 
\hline
\end{tabular}
\end{table}