\documentstyle[twoside, ibvs2, ibvst, epsf]{article} 

\begin{document}

\IBVShead{5418}{21 May 2003}

\IBVStitle{CCD photometry of U UM\lowercase{i}}

\IBVSauth{\v{S}melcer, L.}

\IBVSinsto{Vala\v{s}sk\'{e} Mezi\v{r}\'{\i}\v{c}\'{\i} Observatory, Vset\'{\i}nsk\'{a} 78, 757 01 Vala\v{s}sk\'{e}, Mezi\v{r}\'{\i}\v{c}\'{\i}, Czech Republic;\\  e-mail: {\tt lsmelcer@astrovm.cz}}

\SIMBADobj{U UMi}
\IBVStyp{ M }
\IBVSkey{U UMi - photometry}


\begintext

\IBVSTnam{U~UMi}

\IBVSTcoo{14\hr17\mm19\fsec90}{66\deg47\arcm39\farcs10}{2000}

\IBVSTobs{L. \v{S}melcer: Vala\v{s}sk\'{e} Mezi\v{r}\'{\i}\v{c}\'{\i} Observatory, astrocamera ZEISS 120/540 mm}

\IBVSTdet{SBIG ST-7 camera}

\IBVSTfil{$V$}

\IBVSTdateobs{1999.05.09 -- 2001.05.30}

\IBVSTcomp{GSC 4178 275 = PPM 18967 = SAO 16345 = \hbox{BD +67\deg 833}; $V$ = 9.60 mag, $B-V$ = 0.417 mag} 

\IBVSTsysn

\IBVSedata{5418-t3.txt}
%\IBVSdataKey{5418-t3.txt}{U UMi}{photometry}

\IBVSTtyp{ M }

\IBVSTrem{U Ursae Minoris (= GSC 4178 277 = HD 125 556) is a Mira type star, with spectral type varying between M6e and M8e and with range
of optical light variations between visual magnitudes 7.1 and 13.0. In the fourth edition of the GCVS (Kholopov et al., 1985) a period of 330.92 days is given for its light variations. Altogether 385 measurements have been collected, with typical errors of 0.03 mag.
Two maxima and two minima timings are determined using the Kwee and van Woerden (1956) method implemented in AVE (Barbera, 2000) and their values are given in Table 1.
The light curve of U~UMi is shown in Figure 1.}

\clearpage

\begin{table}[!ht]
\caption{Maxima timings of U~UMi.}
\begin{center}
\begin{tabular}{cc}
\hline
Geo.\ JD & Error \\
\hline
2451564.9 & 0.6   \\
2451886.5 & 1.1 \\
\hline
\end{tabular}
\end{center}
\end{table}

\begin{table}[!ht]
\caption{Minima timings of U~UMi.}
\begin{center}
\begin{tabular}{cc}
\hline
Geo.\ JD & Error \\
\hline
2451718.6 & 1.0 \\
2452032.1 & 1.2 \\
\hline
\end{tabular}
\end{center}
\end{table}

\IBVSTdata{Through the IBVS website as {\tt 5418-t3.txt}.}

{\it Acknowledgements:} This work has made use of the SIMBAD database, operated at CDS, Strasbourg, France. The NASA ADS Abstract Service was used to access data and references.


\IBVSfig{8cm}{5418-f1.eps}
%%\IBVSfigKey{5418-f1.eps}{U UMi}{light curve}


\references

Barbera, R., 2000, {\tt http://www.astrogea.org/soft/ave/aveint.htm}

Kholopov, P. N. et al., 1985, {\it General Catalogue of Variable Stars}, 4th edition, Moscow

Kwee, K. K. and Van Woerden, H., 1956, {\it BAN}, {\bf 12}, No.\,464, 327

\endreferences

\end{document}

