\begin{table}%t4
\caption{\label{table:nova_bol194}Optical constraints on a nova in Bol 194.}
\small 
\par
%\centerline
{
\begin{tabular}{lccll}\hline\hline\\[-3mm]
Date1 [UT]$^a $ & Date2 [UT]$^a $ & RJD1 [d]$^b $ & RJD2 [d]$^b $ & Delay [d]$^c $ \\ \hline
2005-02-15 & 2005-05-12 & 3417 & 3503 &  990--904\\
2006-02-19 & 2006-05-09 & 3786 & 3865 & 621--542\\
2007-02-18 & 2007-05-20 & 4150 & 4241 & 257--166\\
 \hline
\end{tabular}}
\par
\medskip
Notes:\hspace{0.3cm} $^a $ Start date (date1) and end date (date2) of the non-\\
\hspace*{1.4cm} detection periods.\\
\hspace*{1.1cm} $^b $ The same as in $^a $ but in RJD = JD -- 2~450~000.\\
\hspace*{1.1cm} $^c $ Periods of possible delay time between nova outburst\\
\hspace*{1.4cm} and first detection in X-rays.
\end{table}