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\IBVShead{4154}{31 January 1995}

\centerline{\ft PHOTOELECTRIC UBVR OBSERVATIONS}
\centerline{\ft OF THE PECULIAR CEPHEID RU Cam}
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\begintext

It is well known that RU Cam is a Cepheid with irregularly
variable amplitude (Koll\'ath and Szeidl, 1993).

We observed RU Cam at  the Mt. Maidanak
observatory in September -- October 1994. The 60-cm reflector was used
and 16 UBVR$_c$ measurements were obtained
(Table 1); the accuracy of the individual data is near 0.02 mag in all filters.
According to our data the amplitude of light curve (Fig.1) is near 0.03 mag.

The phases are calculated with the elements:

    $$Max JD hel = 2400000 + 22 \times E.$$

This study was partially supported by the Russian Foundation
for  Fundamental  Research  through  grants No.\,94-02-04344 and No.
94-02-04347.
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Table 1
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 \begin{tabular}{cccccc}
 \hline
JD hel & Phase & V & U$-$B & B$-$V & V$-$R$_c$ \\
2440000+ & & & & & \\
\hline
\\
9617.3410 & .334 & 8.288 &   -   & 1.099 & .465 \\
9620.3961 & .473 & 8.434 & 1.059 & 1.145 & .474 \\
9621.3942 & .518 & 8.505 &  .992 & 1.138 & .498 \\
9622.4469 & .566 & 8.537 & 1.046 & 1.139 & .515 \\
9623.4003 & .609 & 8.519 & 1.006 & 1.158 & .475 \\
9624.3486 & .652 & 8.565 & 1.151 & 1.147 & .496 \\
9624.4256 & .656 & 8.578 & 1.039 & 1.121 & .505 \\
9625.3688 & .699 & 8.581 & 1.170 & 1.144 & .497 \\
9631.3586 & .971 & 8.553 &   -   & 1.135 & .488 \\
9632.3634 & .017 & 8.525 &  .993 & 1.118 & .502 \\
9632.4487 & .020 & 8.542 &  .969 & 1.115 & .496 \\
9633.3309 & .060 & 8.477 & 1.011 & 1.122 & .505 \\
9633.4283 & .065 & 8.521 & 1.009 & 1.103 & .479 \\
9634.3447 & .107 & 8.483 & 1.087 & 1.127 & .500 \\
9635.3970 & .154 & 8.480 &   -   & 1.101 & .497 \\
9635.4695 & .158 & 8.484 &   -   & 1.090 & .491 \\
\hline
\\
\end{tabular}
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\centerline{2}
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\centerline{Figure 1}
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\beginauthors
\authorsrightcol
L.N. BERDNIKOV
O.V. VOZIAKOVA
Sternberg Astronomical Institute
13, Universitetskij prosp.
Moscow 119899, Russia
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%\references
Reference:

Koll\'ath Z., Szeidl B., 1993, {\it Astron. Astrophys.}, {\bf 277}, 62

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