\documentstyle[twoside]{article}

\input ibvs2.sty

\begin{document}

\IBVShead{4877}{13 April 2000}

\IBVStitle{Photoelectric Minima of Eclipsing Binaries}

\IBVSauth{OG{\L}OZA, W.$^{1,2}$; DR\'O\.ZD\.Z, M.$^1$; ZO{\L}A, S.$^{1,3}$}

\IBVSinst{Mt.\ Suhora Observatory, Cracow Pedagogical
University, Podchorazych 2, 30-086 Krakow, Poland,\\ \indent
ogloza@wsp.krakow.pl} %email


\IBVSinst{N. Copernicus Astronomical Center, Bartycka 18, 00-716
Warsaw, Poland}

\IBVSinst{Cracow Astronomical Obserwatory, Orla 171, 30-244
Krakow, Poland}

\SIMBADobjAlias{ZZ Aur}{BD+41 1265}
\SIMBADobjAlias{AO Cam}{BD+52 826}
\SIMBADobjAlias{BH CMi}{NSV 3867}
\SIMBADobjAlias{XZ CMi}{BD+04 1850}
\SIMBADobjAlias{CC Com}{GSC 01986-02106}
\SIMBADobjAlias{V1061 Cyg}{BD+51 2997}
\SIMBADobjAlias{DQ Her}{NOVA Her 1934}
\SIMBADobjAlias{XY Leo}{BD+18 2307}
\SIMBADobjAlias{SW Lyn}{BD+42 1811}
\SIMBADobjAlias{UZ Lyr}{BD+37 3424}
\SIMBADobjAlias{V Sge}{GCRV 70890}
\SIMBADobjAlias{W UMi}{BD+86 244}
\SIMBADobjAlias{HW Vir}{BD-07 3477}
\SIMBADobjAlias{PG 1336-018}{[HMD92] 864-  1}

\begintext

The following table lists the unpublished photoelectric times of minima
of several binaries observed at Mt.~Suhora Observatory of Cracow
Pedagogical University after 1997. The observations were made using a
double channel photometer (Kreiner et al.\ 1993), attached to the
0.6/7.5-m Cassegrain telescope. They were reduced in a usual way and
left in the instrumental system (near to the UBVRI). The times of
minima were determined using Kwee and van Woerden (KW) (1956) method or
by parabola fitting (PF) or by Kordylewski's tracing paper (TP)
(Szafraniec 1948) graphic method. The $O-C$ values were computed using
elements given in the General Catalogue of Variable Stars (IV edition,
Moscow, 1985-87). Entries in all columns are self-explanatory. For a
few stars we use following elements to $O-C$ calculations.

\begin{center}
\begin{tabular}{ll}
 BH CMi & $2450518.3851+0.55994477 \times E$\\
 DQ Her & $2434954.9438+0.1936209014 \times E$\\
 HW Vir & $2445730.5569+0.1167195525 \times E$\\
 PG1336-18 & $2450223.3613+0.101015999 \times E$\\
\end{tabular}
\end{center}

Observers: MD -- Marek Dr\'o\.zd\.z; JK -- Jerzy Krzesi\'nski; SZ -- Stanis{\l}aw Zo{\l}a; WO -- Waldemar Og{\l}oza.

\begin{center}
\normalsize
Table 1
\vskip 2mm
\begin{tabular}{llllrlll}
\hline Star & Filters & HJD 2400000\,+ & Error & $O-C$ & Type & 
Method & Observer\\
\hline
ZZ Aur & B,V & 50800.641 & $\pm$0.016 & 0.012 & Pri. & PF & MD\\
 & B,V,R & 51111.4676 & $\pm$0.0002 & 0.0103 & Pri. & KW & WO\\
 & R & 51147.5443 & $\pm$0.0020 & 0.0141 & Sec. & PF & WO\\
AO Cam & V & 51199.4585 & $\pm$0.0001 & 0.0834 & Sec. & KW & MD\\
 & V & 51199.6237 & $\pm$0.0001 & 0.0836 & Pri. & KW & MD\\
 & B,V,R,I & 51237.397 & $\pm$0.004 & 0.0816 & Sec. & KW & MD\\
 & B,V,R,I & 51241.5223 & $\pm$0.0002 & 0.0828 & Pri. & KW & MD\\
 & B,V,R,I & 51597.486 & $\pm$0.005 & 0.0659 & Pri. & PF & MD\\
BH CMi & U,B,V,R & 50067.6330 & $\pm$0.0004 & 0.034 & Pri. & KW & WO\\
 & B,V,R & 50088.608 & $\pm$0.008 & $-$0.0189 & Sec. & KW & WO\\
 & B,V,R,I & 50518.3846 & $\pm$0.0017 & $-$0.0005 & Pri. & KW & WO\\
 & B,V,R,I & 51189.4860 & $\pm$0.004 & 0.0071 & Sec. & KW & SZ\\
\hline
\end{tabular}
\end{center}

\newpage

\begin{center}
\normalsize
Table 1 (cont.)
\vskip2mm
\begin{tabular}{llllrlll}
\hline 
Star & Filters & HJD 2400000\,+ & Error & $O-C$ & Type & 
Method & Observer\\
\hline
XZ CMi & B,V,R,I & 51159.5274 & $\pm$0.0012 & $-$0.0089 & Pri. & KW & MD\\
CC Com & B,V,R,I & 51207.5459 & $\pm$0.0001 & $-$0.0103 & Sec. & KW & WO\\
V1061 Cyg & B,V,R,I & 51159.3789 & $\pm$0.0011 & $-$0.008 & Pri. & KW & MD\\
UX Her & V,R & 50943.3753 & $\pm$0.0002 & 0.0307 & Pri. & KW & SZ\\
 & V,R & 50970.4873 & $\pm$0.0002 & 0.0378 & Pri. & KW & SZ\\
DQ Her & -- & 50629.5307 & $\pm$0.0004 & 0.0068 & Pri. & KW & JK\\
 & -- & 50632.4306 & $\pm$0.0003 & 0.0024 & Pri. & KW & JK\\
XY Leo & V,R,I & 51257.4389 & $\pm$0.0003 & $-$0.1366 & Pri. & KW & SZ\\
 & B,V,R,I & 51550.4893 & $\pm$0.0004 & $-$0.1322 & Sec. & KW & WO\\
 & B,V,R,I & 51550.6314 & $\pm$0.0004 & $-$0.1321 & Pri. & KW & WO\\
SW Lyn & U,B,V,R & 49762.3114 & $\pm$0.0008 & 0.0118 & Pri. & TP & MD\\
 & B,V,R,I & 50753.5418 & $\pm$0.0002 & 0.0286 & Pri. & KW & MD\\
 & B,V,R,I & 50865.6120 & $\pm$0.0004 & 0.0317 & Pri. & KW & MD\\
 & B,V,R & 50866.2562 & $\pm$0.0003 & 0.0319 & Pri. & KW & MD\\
 & B,V,R,I & 50884.2888 & $\pm$0.0005 & 0.0307 & Pri. & TP & MD\\
UZ Lyr & B,V,R & 50674.4031 & $\pm$0.0003 & $-$0.0085 & Pri. & KW & WO\\
V Sge & V,R & 50969.4725 & $\pm$0.0004 & $-$0.0213 & Pri. & KW & SZ\\
W UMi & B,V,R,I & 51151.3950 & $\pm$0.0005 & $-$0.1154 & Pri. & KW & MD\\
HW Vir & U,B,V,R,I & 49778.6249 & $\pm$0.0005 & 0.0005 & Pri. & KW & WO\\
 & B,V, & 49785.6279 & $\pm$0.0002 & 0.0003 & Pri. & KW & WO\\
 & U & 49808.5048 & $\pm$0.0007 & 0.0002 & Pri. & KW & WO\\
 & B,V, & 50552.4744 & $\pm$0.0002 & $-$0.0007 & Pri. & KW & WO\\
 & R,I & 50594.3768 & $\pm$0.0007 & $-$0.0006 & Pri. & KW & WO\\
 & R & 50604.4147 & $\pm$0.0010 & $-$0.0006 & Pri. & KW & WO\\
 & I & 50927.4938 & $\pm$0.0002 & $-$0.0012 & Pri. & KW & WO\\
 & V,R & 51300.4125 & $\pm$0.0002 & $-$0.0014 & Pri. & KW & SZ\\
 & R & 51301.3460 & $\pm$0.0001 & $-$0.0017 & Pri. & KW & SZ\\
 & R & 51301.4629 & $\pm$0.0001 & $-$0.0015 & Pri. & KW & SZ\\
PG1336-18 & -- & 51278.3724 & $\pm$0.0001 & 0.0000 & Pri. & PF & JK, WO\\
 & -- & 51278.4228 & $\pm$0.0003 & $-$0.0001 & Sec. & KW & JK, WO\\
 & -- & 51278.4734 & $\pm$0.0002 & 0.0000 & Pri. & PF & JK, WO\\
 & -- & 51278.5237 & $\pm$0.0003 & $-$0.0002 & Sec. & KW & JK, WO\\
 & -- & 51278.5742 & $\pm$0.0002 & $-$0.0002 & Pri. & PF & JK, WO\\
 & -- & 51281.3020 & $\pm$0.0002 & 0.0001 & Pri. & PF & JK, WO\\
 & -- & 51281.3521 & $\pm$0.0004 & $-$0.0003 & Sec. & PF & JK, WO\\
 & -- & 51283.3221 & $\pm$0.0002 & $-$0.0001 & Pri. & PF & JK, WO\\
 & -- & 51283.3725 & $\pm$0.0005 & $-$0.0002 & Sec. & PF & JK, WO\\
 & -- & 51283.4231 & $\pm$0.0002 & $-$0.0001 & Pri. & PF & JK, WO\\
 & -- & 51284.5342 & $\pm$0.0002 & $-$0.0002 & Pri. & PF & JK, WO\\
 & -- & 51318.3740 & $\pm$0.0001 & $-$0.0007 & Pri. & TP & JK, WO\\
 & -- & 51318.4750 & $\pm$0.0001 & $-$0.0007 & Pri. & TP & JK, WO\\
 & -- & 51320.3942 & $\pm$0.0001 & $-$0.0008 & Pri. & TP & JK,WO\\
 & -- & 51320.4954 & $\pm$0.0002 & $-$0.0007 & Pri. & TP & JK,WO\\
\hline
\end{tabular}
\end{center}

\references

Kreiner J.M., Krzesi\'nski J., Pokrzywka B., Pajdosz G., Zo{\l}a
S., Dr\'o\.zd\.z M., 1993, {\it Proceedings of IAU Colloquium},
No.\ 136, Dublin, 80

Kwee K.K., van Woerden H., 1956, {\it BAN}, {\bf 12}, 327

Szafraniec R., 1948, {\it Acta Astron.\ ser.\ C}, {\bf 4}, 81

\end{document}
