\documentstyle[twoside,epsf]{article}

\input ibvs2.sty
\input ibvst.sty

\begin{document}
\IBVShead{4604}{29 June 1998}

\IBVStitletl{Photometric and Polarimetric Observations of}{ Visual Binary WDS 00550+2338 (ADS 755 = HD 5286)}

\IBVSauth{V.S. TAMAZIAN$^1$, J.A. DOCOBO$^1$, N.D. MELIKIAN$^2$} 
   


\IBVSinst{Astronomical Observatory ``R. M. Aller'', University of
Santiago de Compostela P. O. Box 197, 15706  Santiago de Compostela,
Spain. E-mail: oatamaz@usc.es, oadoco@usc.es}

\IBVSinst{Byurakan Astrophysical Observatory, 378433, Byurakan,
Armenia. E-mail: nmelikia@bao.sci.am}

\SIMBADobj{HD 5286}

\begintext

\IBVSTnam{ADS 755AB; HD 5286}

\IBVSTcoo{00\hr 55\fmm 0}{+23\deg 38\arcm}{2000.0}

\IBVSTobs{Byurakan Astrophysical Observatory, 50cm reflector AZT-14}

\IBVSTdet{Photoelectric photometer (photomultiplier FEU-79)}

\IBVSTfil{B - CC5(3mm)+CZC21(5mm);\\ & V - JC18(1.5mm)+CZC21(1.5mm)}

\IBVSTcomp{SAO74365 = GC1096 = BD +23\deg 126}


\IBVSTsys{B and V}

\IBVSTdata{Through IBVS Web-site}

\IBVSTtyp{ Unknown }


\IBVSTrem{
Photometric monitoring of the visual binary suspected in variability (NSV 343, Kukarkin et
al., 1982) has been carried out between November 25 and
December 3, 1997 (in Table 1 photometric data are given). Mean values of
apparent brightness in B (6.66) and V (5.59)  bands as well as mean colour
index B$-$V = 1.07 coincide with or are very close to those reported earlier
by Argue (1966) and Lee (1970).  Variation in brightness was insignificant
for all observational period except that on November, 27 (JD 2450 779.33)
when a sudden increase ($\Delta$B = 0.56, $\Delta$V = 0.28)  has been
registered over the course of about 2 hours being a real evidence of its
light variation. This suggest that at least one of the components is
demonstrating short-term variability. No significant polarimetric signal
in UBVR bands was observed on any occasion. Further study of this system
would be welcome in order to clarify the nature of detected variability.
}

\begin{table}[t]
\caption{Results of photometric measurements}
\begin{center}
\begin{tabular}{rrrrrr}
\hline
 Date        & Time (UTC) &  JD 2450+  &   B    &     V     &    B$-$V \\
\hline
 25.11.1997  &  17\hr 00\mm   &   777.21  &   6.74   &   5.65  &    +1.09 \\
             &  20\hr 00\mm   &   777.33  &   6.72   &   5.62  &    +1.10 \\
 26.11.1997  &  16\hr 40\mm   &   778.20  &   6.79   &   5.69  &    +1.10 \\
             &  18\hr 50\mm   &   778.29  &   6.68   &   5.59  &    +1.09 \\
             &  19\hr 35\mm   &   778.31  &   6.69   &   5.59  &    +1.10 \\
 27.11.1997  &  16\hr 00\mm   &   779.17  &   6.70   &   5.60  &    +1.10 \\
             &  17\hr 45\mm   &   779.24  &   6.69   &   5.61  &    +1.08 \\
             &  20\hr 00\mm   &   779.33  &   6.13   &   5.33  &    +0.80 \\
 28.11.1997  &  17\hr 20\mm   &   780.22  &   6.74   &   5.65  &    +1.09 \\
 01.12.1997  &  16\hr 00\mm   &   783.17  &   6.74   &   5.63  &    +1.11 \\
             &  17\hr 30\mm   &   783.23  &   6.70   &   5.63  &    +1.07 \\
             &  19\hr 25\mm   &   783.31  &   6.75   &   5.60  &    +1.15 \\
             &  20\hr 40\mm   &   783.36  &   6.72   &   5.64  &    +1.08 \\
 02.12.1997  &  17\hr 30\mm   &   784.23  &   6.75   &   5.64  &    +1.11 \\
             &  21\hr 00\mm   &   784.38  &   6.70   &   5.65  &    +1.05 \\
 03.12.1997  &  18\hr 00\mm   &   785.25  &   6.74   &   5.69  &    +1.05 \\
             &  22\hr 15\mm   &   785.43  &   6.75   &   5.65  &    +1.10 \\
\hline
\end{tabular}
\end{center}
\end{table}


\references

Argue, A.N., 1966, MNRAS, 133, 475 

Kukarkin, B.N., Kholopov, P.N., Artiukhina, N.M., Fedorovich, V.P.,
Frolov, M.S., Go\-ran\-skij, M.P., Gorynya, N.P., Karitskaya, E.A.,
Kireeva, N.N., Kukarkina, N.P. et al., 1982, New Catalogue of 
Suspected Variable Stars, Nauka Publ.\ House, Moscow

Lee, T.A., 1970, ApJ, 162, 217

\end{document}


