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\input ibvs2.sty
\input ibvse.sty

\begin{document}

\IBVShead{5230}{30 January 2002}

\IBVStitle{Times of Minima of Eclipsing Binaries}

\IBVSauth{Csizmadia, Sz.$^1$; Zhou, A. Y.$^2$; K\"onyves, V.$^{3,4}$; Varga, Z.$^{3,5}$; S\'andor, Zs.$^{3,4}$}

\IBVSinst{Konkoly Observatory of the Hungarian Academy of Sciences, 
H-1525 Budapest, P. O. Box 67, Hungary \\ 
e-mail: csizmadia@konkoly.hu}

\IBVSinst{National Astronomical Observatories, Chinese Academy of 
Sciences, Beijing, P. R. China} 

\IBVSinst{Dept. of Astronomy of E\"otv\"os University, Hungary}

\IBVSinst{Guest astronomer at Konkoly Observatory}

\IBVSinst{Summer training at Konkoly Observatory}

\SIMBADobj{IM Aur}
\SIMBADobj{TV Cas}
\SIMBADobj{AH Cnc}
\SIMBADobj{ES Cnc}
\SIMBADobj{EV Cnc}
\SIMBADobj{V861 Her}
\SIMBADobj{XZ Leo}
\SIMBADobj{V404 Lyr}
\SIMBADobj{AH Tau}
\SIMBADobj{EQ Tau}
\IBVSabs{19 times of minima of ten eclipsing binary stars are reported. A}
\IBVSabs{preliminary ephemeris of EV Cnc is given.}

\begintext

\IBVSEobs{1m RCC telescope of the Konkoly Observatory; 0.85m Cassegrain telescope of the Xinglong Station of the Beijing Astronomical Observatory.}

\IBVSEdet{$1024\times1024$ pixels Photometrics or $1152\times770$ pixels Wright CCD camera on the 1m RCC telescope. These cameras were cooled electronically. For variables observed by the 0.85m telescope see Zhou (2001).}

\IBVSEred{IRAF/DAOPHOT\footnotemark ~package}

\footnotetext{IRAF is distributed by the National Optical Astronomical
Observatories, operated by the Association of the Universities for
Research in Astronomy, inc., under cooperative agreement with the National
Science Foundation}

\IBVSEmethod{Kwee \& van Woerden (1956)}

{\small
\IBVSEstars{IM Aur   & EA & 05 15 30 & +46 24 22 & GSC 03358-01208 & 38327.7922 & 1.2472906 & 1 \\
TV Cas   & EA & 00 19 19 & +59 08 21 & GSC 03665-00026 & 44602.4534 & 1.8125956 & 2 \\
AH Cnc   & EW & 08 51 38 & +11 50 54 & GSC 00814-01981 & 41740.7166 & 0.36044098 & 2 \\
ES Cnc   & EA & 08 51 21 & +11 53 25 & GSC 00814-01425 & 44643.2535 & 1.0677978 & 3 \\
EV Cnc   & EW & 08 51 29 & +11 49 31 & GSC 00814-01311 & 51603.2028 & 0.4483 & 4 \\
V861 Her & EW & 16 51 13 & +41 17 58 & GSC 03079-00194 & 43684.325  & 0.3446322 & 5 \\
XZ Leo   & EW & 10 02 34 & +17 02 47 & BD +17\deg 2163a&45025.3540&0.48773685& 6 \\
V404 Lyr & EB & 19 19 06 & +38 22.0  & GSC 03121-01597 & 35836.448  & 0.7309432 & 7 \\
AH Tau   & EW & 03 47 12 & +25 07.0  & Mel 22 - HHJ 417& 47000.2689 & 0.33267164 & 8 \\
EQ Tau   & EW & 03 48 13 & +22 19 22 & Mel 22 AK I-1-170&40213.3250 & 0.34134848 & 2 \\
}
}

\IBVSEsource{1. Bartolini \& Zoffoli (1986), 2. General Catalogue on
Variable Stars, Kholopov et al. (1998), 3. Goranskij et al. (1992), 4.
Present paper, 5. Antipin (1996), 6. Niarchos et al. (1996), 7. Csizmadia
\& S\'andor (2001), 8. Pribulla et al. (2001)}

\IBVSEmin{IM Aur & 51563.401  & .0015 & II & V & $-$0.005  & 1m RCC \\
       & 51568.3863 & .0004 & II & V & $-$0.0085 & " \\
       & 51570.2574 & .0005 & I  & V & $-$0.0084 & " \\
       & 51606.4224 & .0005 & I  & V & $-$0.0148 & " \\
       & 52247.5284 & .0003 & I  & V & $-$0.0269 & " \\
TV Cas & 51925.3255 & .0004 & I  & V & $-$0.0141 & " \\
AH Cnc & 51585.1847:& .0002 & II & V & $-$0.0762 & 0.85m Cassegrain \\
ES Cnc & 51602.0961 & .0003 & I  & V & +0.0043 & " \\
       & 51603.1655 & .0004 & II & V & +0.0059 & " \\
EV Cnc & 51603.2028 & .0002 & I  & V &  0.0000 & " \\
       & 51604.0883 & .0003 & I  & V & $-$0.0111 & " \\
V861 Her&51690.5276 & .0002 & I &mean (VRI)& +0.0520 & 1m RCC \\
       & 51695.5268 & .0006 & II&mean (VRI)& +0.0540 & " \\
XZ Leo & 52274.5538 & .0002 & I & V & $-$0.0330 & " \\
V404 Lyr&52106.51253& .00006& I & V & $-$0.00016& " \\
AH Tau & 52246.33511& .00005& II& R & +0.00141& " \\
EQ Tau & 52232.3484 & .0006 & II& V & $-$0.0244& " \\
       & 52232.5192 & .0003 & I & V & $-$0.0243& " \\
       & 52247.3679 & .0002 & II& mean(VRI)& $-$0.0243& " \\
 }

\IBVSEack{This work has been supported by OTKA Grant T034551. KV and VZ
thank the hospitality of the staff of the Konkoly Observatory.}


\references 

Antipin, S.V., 1996, {\it IBVS}, No. 4360

Bartolini, C., Zoffoli, M, 1986, {\it A\&A} {\bf 168}, 377

Csizmadia, Sz. \& S\'andor, Zs., 2001, {\it IBVS}, No. 5045

Goranskij, V. P., Kusakin, A. V., Mironov, A. V., Moshkaljov, V. G., Pastukhova, E. N., 1992, {\it Astron. Astrophys. Trans.}, {\bf 2}, 201

Kholopov P.N., Samus N.N., Frolov M.S., Goranskij V.P., Gorynya N.A.,
Karitskaya E.A., Kazarovets E.V., Kireeva N.N., Kukarkina N.P., Kurochkin
N.E., Medvedeva G.I., Pastukhova E.N., Perova N.B., Rastorguev A.S.,
Shugarov S.Yu., 1998, The Combined General Catalogue of Variable Stars,
4.1 Edition (available via the Internet: 
http://cdsweb.u-strasbg.fr/cgi-bin/Cat?II/214A)

Kwee, K. K., \& van Woerden, H., 1956, {\it Bull.\ Astron.\ Inst.\ Neth.}, {\bf 12}, 327

Niarchos, P. G., Hoffman, M., Duerbeck, H. W., 1994, {\it A\&A}, {\bf 292}, 494

Pribulla, T., Vanko, M., Parimucha, S., Chochol, D., 2001, {\it IBVS}, No. 5056

Zhou, A. Y., 2001, {\it IBVS}, No. 5096


\endreferences 


\vspace{1cm}

%Erratum from issue 5713
\IBVSerratum{5230}

\bigskip

In IBVS 5230 we published several times of minima. One is
corrected here. Instead of:

\smallskip

\centerline{\tt XZ Leo  	52274.5538  	.0002  	I  	V  	-0.0330   "}

\smallskip
the following should read:
\smallskip

\centerline{\tt XZ Leo  	52274.5955  	.0002  	I  	V  	+0.0054   "}

\bigskip
\bigskip

Szil\'ard Csizmadia

\end{document}
