\begin{table}%t2
%\centering
\par
 \caption{\label{tab:obs}Log of spectroscopic observations of the three components of
\object{BD +62\degr2296}. The brighter component A is a B2.5Ia
supergiant; component C is B0III, while component B is
WN4. Observations marked A+B were performed under seeing conditions
not allowing the separation of the two components. All dates refer to
2002.}
\begin{tabular}{lccc}
\hline\hline
Component & Telescope & Date & Wavelength range\\
\hline
A + B & OHP 1.52-m & Jan. 18 & $3960{-}4410$~\AA \\ 
A + B & OHP 1.52-m & Jan. 19 & $4460{-}4910$~\AA \\
A + B & OHP 1.52-m & Jan. 20 & $5630{-}6080$~\AA\\
A + B & OHP 1.52-m & Jan. 20 & $6890{-}6940$~\AA\\
A + B & OHP 1.93-m & Jul. 6 & $3960{-}4980$~\AA \\
C & OHP 1.93-m & Jul. 6 & $3960{-}4980$~\AA \\
A + B & OHP 1.93-m & Jul. 7 & $3960{-}5900$~\AA \\
A & INT 2.5-m & Jul. 22 & $3750{-}8000$~\AA \\
C & INT 2.5-m & Jul. 22 & $3750{-}5100$~\AA \\
B & INT 2.5-m & Jul. 23 & $4050{-}4910$~\AA \\
C & INT 2.5-m & Jul. 24 & $6300{-}7100$~\AA \\
B & INT 2.5-m & Jul. 25 & $6300{-}7100$~\AA \\
\hline
\end{tabular}
 \end{table}