\documentstyle[epsf]{article}

\input ibvs.sty

\begin{document}
\IBVShead{4212}{28 June 1995}

\centerline{\ft PHOTOELECTRIC BV(RI)$_c$ OBSERVATIONS OF }
\centerline{\ft THE PECULIAR CEPHEID V473 Lyr
\footnote{\small Based on observations obtained at the Cerro Tololo
Inter-American Observatory}}
\vskip 8mm
\begintext

V473 Lyr is classified  as a Cepheid with
variable amplitude in the GCVS.
So for study of the pulsation behaviour of this star, it is very
important to observe it as often as possible.

We observed V473 Lyr at CTIO in March and April 1995.
The 60--cm reflector was used and 9 $BV(RI)_c$
measurements were obtained (Table 1); the accuracy
of the individual data is near 0.01 mag in all filters.
According to our data, the amplitude of the light
curve (Fig.1) is near 0.12 mag in V.

The phases are calculated with the elements:

    $$Max JD hel = 2428738.767 + 1.490813 \times E.$$
\vskip 1mm
\epsfysize=10cm
\centerline{\epsffile{4212-f1.ps}}
\centerline{Figure 1}


\vfill \eject

\centerline{2}
\vskip 2mm
\centerline{Table 1}
\medskip
\begin{center}
\begin{tabular}{ccccc}
\hline
JD hel & $V$ & $B-V$ & $(V-R)_c$ & $(R-I)_c$\\
2400000+ & & & & \\
\hline
\\
 49811.9005& 6.214& 0.654& 0.358& 0.357\\
 49813.8983& 6.136& 0.620& 0.342& 0.349\\
 49814.8984& 6.187& 0.640& 0.356& 0.362\\
 49817.8986& 6.200& 0.664& 0.368& 0.362\\
 49818.8989& 6.108& 0.625& 0.350& 0.298\\
 49821.8963& 6.096& 0.608& 0.355& 0.330\\
 49822.9003& 6.147& 0.601& 0.374& 0.352\\
 49823.9009& 6.204& 0.648& 0.389& 0.350\\
 49825.9011& 6.154& 0.603& 0.353& 0.356\\
\hline
\end{tabular}
\end{center}
\vskip 5mm
The research described in this publication was made possible in part
by grants No. NDD000 and No. NDD300 from the International Science
Foundation and Russian Government as well as  by
grant No. 95--02--05276 from the Russian Foundation of Basic Research
to LNB and by funds awarded through the Natural
Sciences and Engineering Research Council of Canada (NSERC) to DGT.

\vskip 2cm

\beginauthors
\authorsrightcol
 L.N. BERDNIKOV
 Sternberg Astronomical Institute
 13, Universitetskij prosp.
 Moscow 119899, Russia
\vskip 2mm
 D.G. TURNER
 St. Mary's University
 923 Robie st.
 Halifax, NS B3H 3C3, Canada
\endauthors

\end{document}
