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\IBVShead{4398}{20 November 1996}

\centerline{\ft PHOTOELECTRIC $BVR_c$ OBSERVATIONS OF THE CEPHEID V553 Cas}
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Recently Shugarov (1996) has analysed photographic archival plates
at Sternberg Astronomical Institute of Moscow and found that
V553 Cas is a Cepheid variable with the elements:
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\centerline{Max JD$_{hel}$ = 2450323.60 + 4.90039 $\times$ E}
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We observed this Cepheid photoelectrically at Mt. Maidanak
observatory  in August 1996 using
the 60-cm reflector; a total of 31 $BVR_{\rm c}$
measurements were obtained (Table 1), the accuracy
of the individual data is near $\pm$0\fm 01 in  $V$ and
near $\pm$0\fm 02 in $B-V$ and $V-R_{\rm c}$.
Above elements are used in Figure 1 for plotting our
observations. According to our data, the amplitude of the light
curve is  0\fm 85  in $V$, 0\fm 38 in $B-V$ and 0\fm 24
in $V-R_c$.

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The research described here was made possible in part by grants
No. 95--02--05276 and No. 94--02--04347 from the Russian
Foundation of Basic Research.
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Table 1
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\begin{tabular}{cccccccc}
\hline
$JD_{hel}$&$V$&$B-V$&$V-R_c$&$JD_{hel}$&$V$&$B-V$&$V-R_c$\\
2450300+ & & & &2450300+ & & & \\
\hline
\\
12.2153&13.739&   -  &   -  &  19.2132&13.090& 1.526&  0.951\\
12.4655&   -  &   -  & 1.134&  19.3402&13.136& 1.651&  0.983\\
14.2106&13.038& 1.592&  0.949&  19.4169&13.132& 1.670&  0.990\\
14.3009&13.126& 1.534& 1.025&  20.3198&13.405& 1.790& 1.062\\
14.4355&13.163& 1.597& 1.022&  20.4014&13.400& 1.804& 1.068\\
15.2670&13.356& 1.763&   -  &  21.1947&13.538&   -  & 1.083\\
15.3500&13.348& 1.802& 1.081&  21.4214&13.576& 1.886& 1.098\\
15.3930&13.369& 1.786& 1.073&  22.2075&13.715&   -  & 1.069\\
16.1790&13.498&   -  &   -  &  22.4710&13.783& 1.840& 1.131\\
16.3874&13.566& 1.905& 1.112&  23.2221&13.285& 1.605&  0.992\\
17.2735&13.740& 1.908& 1.093&  23.4582&13.031& 1.593&  0.933\\
17.3553&13.713& 1.983& 1.076&  24.2215&13.148&   -  &  0.952\\
17.4068&13.737& 1.982& 1.117&  24.4056&13.178&   -  &  0.999\\
18.2191&13.360& 1.649& 1.023&  25.1947&13.363&   -  & 1.054\\
18.3108&13.295& 1.615&  0.988&  25.3389&13.423& 1.740& 1.082\\
18.4024&13.187& 1.620&  0.978&         &      &      &\\
\hline
\end{tabular}
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\centerline{Figure 1}

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\beginauthors
\authorsrightcol
 L.~N.~BERDNIKOV
 O.~V.~VOZYAKOVA
 Sternberg Astronomical Institute
 13, Universitetskij prosp.
 Moscow 119899, Russia
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 V.~V.~IGNATOVA
 Astronomical Institute
 33, Astronomicheskaya ul.
 Tashkent 520000, Uzbekistan
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Reference:

Shugarov S.Yu., 1996, private communication



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