\begin{table}%t1
\caption{\label{jou}Journal of the observations. Note that the data coming from
Sierra Nevada and San Pedro Martir (SPM) have been transformed in the
Johnson system as discussed in Sect.~2.2.}
%\centering
\par
\begin{tabular}{cccc}
\hline\hline
HJD-2450000 & HJD-2450000  & Duration &  Filter \\
  start (days)         &   end (days)        &  (hours) &         \\
\hline
& \bf{Loiano CCD  (Italy)}  & & \\
2545.585 &	2545.659&  1.8 & $B$ \\
2547.599 &	2547.681&  2.0 & $B$\\
2548.547 &	2548.611&  1.5 & $B$\\
2549.503 &	2549.623&  2.9 & $B$\\
2628.347 &	2628.627&  6.7 & $B$\\
2629.286 &	2629.453&  4.0 & $B$\\
2630.454 &	2630.513&  1.4 & $B$\\
2654.252 &	2654.332&  1.9 & $B$\\
 	 &\bf{Fairborn-APT (USA)}	&      &\\
2976.875 &	2976.892&   0.4&  $BV$\\
2977.851 &	2977.936&   2.0&  $BV$\\
2978.721 &	2978.933&   5.1&  $BV$\\
2983.573 &	2983.920&   8.3&  $B$ \\
2984.711 &	2984.917&   4.9&  $BV$\\
2987.765 &	2987.902&   3.3&  $BV$\\
	 &\bf{SOAO (Korea)}    &      &\\
2977.170 &	2977.333&   3.9&  $BV$\\
2980.910 &	2981.063&   3.7&  $V$\\
2983.007 &	2983.191&   4.4&  $BV$\\
	 & \bf{OSN (Spain)}	&      &\\
2988.267 &	2988.500&   5.6&  $uvby$\\
3047.364 &	3047.472&   2.6&  $uvby$\\
3048.299 &	3048.459&   3.8&  $uvby$\\
         &\bf{Loiano TTCP (Italy)}	&      &\\
2946.330 &	2946.703&   9.0&  $BV$\\  
2947.287 &	2947.441&   3.7&  $BV$\\
2973.393 &	2973.636&   5.8&  $BV$\\
	 &\bf{SARA (USA)} &      &\\
2970.631 &	2970.756&   3.0&  $B$\\
	 &\bf{SPM (Mexico)}    &      &\\
2970.494 &	2970.818&  7.8 & $uvby$\\
2972.495 &	2972.841&  8.3 & $uvby$\\
2973.493 &	2973.775&  6.8 & $uvby$\\
2974.487 &	2974.585&  2.4 & $uvby$\\
2977.485 &	2977.847&  8.7 & $uvby$\\
         & \bf{BAO (China)}	&      &\\
2972.974 &	2973.383&  9.8 & $V$\\
2974.032 &	2974.146&  2.7 & $V$\\
2974.939 &	2975.382& 10.6 & $V$\\
2976.940 &	2977.078&  3.3 & $V$\\
2984.196 &	2984.292&  2.3 & $V$\\
 &\bf{Teide-OGS (Spain)}&     &\\
2977.506 &	2977.603&  2.3 & $V$\\
  & \bf{Serra la Nave (Italy)}	  	&      &\\
2966.462 &	 2966.62&  3.9&  $BV$\\
2967.337 &	 2967.61&  6.7&  $BV$\\
2973.348 &	 2973.61&  6.4&  $BV$\\
\hline
\end{tabular}
\end{table}