\begin{table}%ta.2
%\centering
\par
\caption{\label{jousf}Journal of available spectrophotometric \ha observations of \zt~.}
\small \begin{tabular}{cccrll}
\hline\hline 
Spg.& Time interval& No. of&\ \ \ \ \ \ \ \ Telescope/&Source\\
No. & (HJD$-$2400000)&Spectra &\ \ \ \ \ \ \ \ Instrument& \\
 \hline 
A &     34442.6    & 1&DAO 1.83-m, prism spg.&\citet{underhill53}\\
B &37367.3--39601.3& 10&OHP 1.93-m, grating spg.&\citet{delplace70b}\\
C &38310.5--38422.5&  5&Merate 1-m, grating spg.&\citet{aydinetal65}\\
D &38688.0--38743.9&  4&DAO 1.22m, grating spg.&\citet{vdwel70}\\
E &     39133.6    &  1&KPNO 2.1-m, grating spg.&\citet{vdwel70}\\
F &43842.5--47922.5& 57&Xing-Long 0.6/0.9-m, grating spg.&\citet{guoetal95}\\
G &44301.6, 44334.6&  2&OHP 1.52-m, grating spg.&\citet{andfer82}\\
H &45200.9--49239.6&  8&ESO 1.4-m CAT, grating spg.&\citet{hanuschal96}\\
I &45424.2--45952.6&  8&Crimean Observatory 2.6-m &\citet{racnas86}\\
J &45424.3--45452.2& 23&Crimean Observatory 1.22-m, grating spg.&\citet{galkina85}\\
K &45606.0--45620.9& 10&SPM 2.1-m, grating spg.&\citet{ballereau87}\\
L &47532.5, 47808.5&  2&KPNO coude feed, grating spg.&\citet{sletebak92}\\
M &49316.6, 49642.8&  2&GI2T spectrograph &\citet{vakili98}\\
N &49592.7--51572.3&  3&OHP 1.93-m, ELODIE &\citet{moultaka2004}\\
O &48251.2--49471.0& 10&Xing-Long 2.16-m, grating spg.&\citet{guo94,guoetal95}\\
P &48347.6--52725.3& 23&ESO HEROS &\citet{rivi2006}\\
Q &     51253.5    &  1&Mt. Abu IR Obs 1,2-m, grating spg.&\citet{banerjee00}\\
R &51850.5--54174.4&108&0.2-m Schmidt-Cassegrain &\citet{poll2008}\\
S &     53063.5   & 1&Ritter Observatory 1-m, grating spg.&\citet{wisn2007}\\
 %\hline 
T &40316.3--48176.6& 39&Ond\v rejov 2.0-m, grating spg.&this paper: red phg. spectra\\
U &46447.6--47159.0& 32&McDonald 2.1-m, CCD grating spg.&this paper: CCD spectra\\
V &49049.3--51486.6& 36&Ond\v rejov 2.0-m, grating spg.&this paper: Reticon spectra\\
W &51898.4--52727.4&  7&Ond\v rejov 2.0-m, grating spg.&this paper: Heros spectra\\
X &52204.6--53446.3& 59&Castanet-Tolosan 0.212-m and 0.190-m&this paper: Buil CCD spectra\\
Y &52279.5--54490.4& 50&Ond\v rejov 2.0-m, grating spg.&this paper: CCD700 spectra\\
Z &53077.8--54443.0& 18&DAO 1.22-m, grating spg. & this paper: CCD spectra\\
\hline
\end{tabular}\vspace*{-3mm}
\end{table}