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\IBVShead{4211}{28 June 1995}

\centerline{\ft PHOTOELECTRIC BV(RI)$_c$ OBSERVATIONS}
\centerline{\ft  AND NEW CLASSIFICATION OF BX Cru
\footnote{\small Based on observations obtained at the Cerro Tololo
Inter-American Observatory}}
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\begintext


BX Cru is classified in GCVS--IV as a classical Cepheid with the
19.537 day period.
However, our photoelectric $BV(RI)_c$ observations carried out with the
0.6 m reflector of CTIO in March--April 1995 (Table 1) show that this
classification is wrong:
for 25 days the light of the star was constantly increasing (Fig. 1),
and moreover, the variations of the color index {\it B$-$V} were not typical of Cepheids. Most likely BX Cru is a semiregular variable.
\vskip 3mm
\centerline{Table 1}
\medskip
\begin{center}
\begin{tabular}{ccccc}
\hline
JD hel & $V$ & $B-V$ & $(V-R)_c$ & $(R-I)_c$\\
2400000+ & & & & \\
\hline
\\
49803.8596& 12.820&  1.847&  1.855&  1.979\\
49804.8442& 12.819&  1.823&  1.833&  1.998\\
49805.8160& 12.767&  1.858&  1.804&  1.992\\
49807.8286& 12.746&  1.848&  1.800&  2.001\\
49808.8375& 12.720&  1.854&  1.792&  1.979\\
49809.7552& 12.692&  1.881&  1.810&  1.973\\
49809.8141& 12.659&  1.867&  1.784&  1.967\\
49810.7955& 12.632&  1.877&  1.764&  1.984\\
49811.7634& 12.639&  1.829&  1.782&  1.968\\
49813.8321& 12.573&  1.876&  1.757&  1.938\\
49814.7850& 12.564&  1.848&  1.759&  1.941\\
49815.7404& 12.550&  1.872&  1.758&  1.939\\
49817.7642& 12.529&  1.879&  1.765&  1.943\\
49817.8151& 12.518&  1.856&  1.756&  1.940\\
49818.7366& 12.498&  1.867&  1.744&  1.930\\
49818.8039& 12.491&  1.884&  1.742&  1.922\\
49821.7267& 12.431&  1.877&  1.731&  1.914\\
49821.7981& 12.443&  1.962&  1.752&  1.914\\
49822.7196& 12.421&  1.936&  1.736&  1.920\\
49823.7168& 12.414&  1.826&  1.718&  1.926\\
49825.7033& 12.403&  1.892&  1.729&  1.922\\
49826.7363& 12.385&  1.857&  1.720&  1.900\\
49827.6929& 12.386&  1.854&  1.707&  1.901\\
\hline
\end{tabular}
\end{center}



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\centerline{Figure 1}
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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.

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\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


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