\documentstyle[twoside, ibvs2, ibvse]{article}

\begin{document}

\IBVShead{5487}{16 December 2003}

\IBVStitle{Times of Minima of Eclipsing Binary Stars}

\IBVSauth{Lacy, C. H. S.}
\IBVSinsto{Department of Physics, University of Arkansas, Fayetteville, Arkansas 72701, USA; e-mail: clacy@uark.edu}

\begintext

\IBVSEobs{URSA Observatory at the University of Arkansas (ursa.uark.edu); 10-inch Schmidt-Cassegrain reflector.}

\IBVSEdet{1020$\times$1530 pixels SBIG ST8EN CCD cooled to (typ.) $-$20 C; 1.15 \arcs square pixels; 20\arcm (N-S) $\times$ 30\arcm (E-W) FOV.}

\IBVSEred{Virtual measuring engine (Measure 1.97) written by C.H.S. Lacy (2003)}

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

\IBVSfoot{Comparison star designations refer to the GSC.}

{\small
\IBVSEstars{
AP And   	& EA/DM	&  23 49 31	& +45 47 21	& 03639 00767\IBVSfm	& 52898.62235	& 1.5872920 	& 1\\
CO And   	& EA/DM	&  01 11 25	& +46 57 49	& 03268 00400	& 52245.65158	& 3.655326  	& 2\\
HP Aur   	& EA/DM	&  05 10 22	& +35 47 47	& 02401 00760	& 52263.62901	& 1.4228192 	& 2\\
KU Aur   	& EA/SD:&  06 28 04	& +30 23 34	& 02422 01381	& 52263.88113	& 1.319577  	& 1\\
CV Boo   	& EA/DM	&  15 26 20	& +36 58 53     & 02570 00511	& 52321.84559	& 0.8469935 	& 2\\
SW Cnc   	& EA/SD:&  09 09 00	& +09 35 42	& 00812 00083	& 52339.81190	& 1.799211  	& 2\\
MU Cas   	& EA/DM	&  00 15 52	& +60 25 54	& 01331 04014	& 51876.5835    & 9.652926  	& 3\\
V381 Cas 	& EA/DM	&  00 32 52	& +49 19 39	& 03256 01906	& 52968.7011 	& 1.7459455 	& 1\\
V389 Cas 	& EA    &  01 14 05	& +48 58 48	& 03272 00102	& 51469.4103 	& 4.989514  	& 1\\
V396 Cas 	& EA/DM	&  23 13 36	& +56 44 06	& 01337 04006	& 52180.7074 	& 5.50545   	& 3\\
V459 Cas 	& EA/DM	&  01 11 30	& +61 08 48	& 00792 04030	& 51144.6845    & 8.458294  	& 3\\
V651 Cas 	& EA/DM	&  23 48 34	& +57 44 57	& 04009 00049	& 52817.87187	& 0.9968096 	& 1\\
VZ Cep   	& EA/DM	&  21 50 11	& +71 26 38	& 01497 04470	& 52054.85215	& 1.18336356	& 1\\
V456 Cyg 	& EA/DM	&  20 28 51	& +39 09 14	& 03152 00323	& 52836.7625 	& 0.89119220	& 1\\
V1061 Cyg	& EA/DM	&  21 07 21	& +52 02 58	& 03600 00278	& 52015.90562	& 2.34663383	& 1\\
HD 23642 	& EA/DM	&  03 47 29	& +24 17 18	& 01800 01908	& 36096.5204 	& 2.46113329	& 4\\
LV Her   	& EA/DM	&  17 35 32	& +23 10 31	& 02076 00580	& 52490.72613	& 18.4359348	& 1\\
RW Lac   	& EA/DM	&  22 44 57	& +49 39 28	& 03629 02473	& 52253.6669 	& 10.36922  	& 2\\
V506 Oph 	& EA/DM	&  17 41 04	& +07 47 04	& 00993 00762	& 52858.6752 	& 1.0604262 	& 1\\
FO Ori   	& EA    &  05 28 10	& +03 37 23	& 00105 02342	& 52275.6149 	& 18.80058  	& 2\\
V648 Ori 	& EA/DM	&  04 52 33	& +06 19 24	& 00096 00758	& 52934.92834	& 1.626468  	& 1\\
IM Per   	& EA/DM	&  03 11 42	& +52 12 42	& 03323 01163	& 52902.9245 	& 2.25422   	& 1\\
V482 Per 	& EA/DM	&  04 15 41	& +47 25 20	& 03332 00388	& 52266.8056 	& 2.4467549 	& 2\\
V514 Per 	& EB/DM	&  03 19 39	& +50 07 12	& 03319 01713	& 52261.5563 	& 1.819159  	& 1\\
RXJ0212.3	& EA    &  02 12 19	& $-$13 30 41	& 05283 01513	& 52634.6593 	& 6.709914  	& 1\\
}
}

{\small
\IBVSEstars{
AQ Ser   	& EB/DM	&  15 22 15	& +02 30 11	& 00340 00252	& 52834.6937 	& 1.687391  	& 1\\
CF Tau   	& EA/D  &  04 05 10	& +22 29 48	& 01814 00104	& 51918.3467 	& 2.75589   	& 1\\
V1094 Tau	& EA/DM	&  04 12 04	& +21 56 51	& 01263 00925	& 49701.7059    & 8.988487  	& 5\\
BP Vul   	& EA/DM	&  20 25 33	& +21 02 18	& 01644 01837	& 52064.89085	& 1.9403494 	& 6\\
BT Vul   	& EA/DM	&  20 23 05	& +27 28 36	& 02164 00403	& 52831.72890	& 1.141200  	& 1\\
}
}


\IBVSEsource{1: This paper, 2: Lacy (2002), 3: Lacy et al. (2002), 4: Torres (2003), 5: Kaiser \& Frey (1998), 6: Lacy et al. (2003)}


{\small
\IBVSEmin{
AP And   	& 52859.7334 	& 0.0004 	& 2	& V	& $-$0.0003  & Sec. phase=0.5\\
         	& 52897.82826	& 0.00010	& 2	& V	& $-$0.00044&\\
         	& 52898.62235	& 0.00013	& 1	& V	& 0.00000&\\
         	& 52902.59047	& 0.00013	& 2	& V	& $-$0.00011&\\
         	& 52936.71705	& 0.00010	& 1	& V	& $-$0.00031&\\
CO And   	& 52826.8474 	& 0.0005 	& 1	& V	& $-$0.0010&\\
         	& 52934.68220	& 0.00018	& 2	& V	& +0.00167 & Sec. phase=0.5\\
         	& 52965.7523 	& 0.0003 	& 1	& V	& +0.0015&\\
HP Aur   	& 52630.7169 	& 0.0003 	& 1	& V	& +0.0005&\\
         	& 52729.60329	& 0.00023	& 2	& V	& +0.00099 & Sec. phase=0.5\\
         	& 52935.91092	& 0.00015	& 2	& V	& $-$0.00016&\\
KU Aur   	& 52263.88113	& 0.00016	& 1	& V	& 0.00000&\\
         	& 52250.68535	& 0.00020	& 1	& V	& $-$0.00001&\\
         	& 52296.8700 	& 0.0005 	& 1	& V	& $-$0.0006&\\
CV Boo   	& 52714.84970	& 0.00012	& 1	& V	& $-$0.00087&\\
         	& 52720.7789 	& 0.0003 	& 1	& V	& $-$0.0006&\\
         	& 52722.89684	& 0.00010	& 2	& V	& $-$0.00017 & Sec. phase=0.5\\
         	& 52731.79016	& 0.00008	& 1	& V	& $-$0.00028&\\
         	& 52739.83638	& 0.00017	& 2	& V	& $-$0.00050&\\
         	& 52742.80172	& 0.00014	& 1	& V	& +0.00036&\\
         	& 52744.9185 	& 0.0003 	& 2	& V	& $-$0.00034&\\
         	& 52750.84701	& 0.00014	& 2	& V	& $-$0.00079&\\
         	& 52751.69380	& 0.00017	& 2	& V	& $-$0.00099&\\
         	& 52756.77595	& 0.00015	& 2	& V	& $-$0.00080&\\
         	& 52765.66967	& 0.00025	& 1	& V	& $-$0.00051&\\
         	& 52778.79870	& 0.00020	& 2	& V	& +0.00012&\\
         	& 52782.60989	& 0.00020	& 1	& V	& $-$0.00016&\\
         	& 52787.69192	& 0.00012	& 1	& V	& $-$0.00010&\\
         	& 52790.65638	& 0.00010	& 2	& V	& $-$0.00011&\\
SW Cnc   	& 52688.8578 	& 0.0006 	& 1	& V	& $-$0.0010&\\
MU Cas   	& 52876.81333	& 0.00024	& 2	& V	& +0.00026 & Sec. E=52181.8024\\
         	& 52905.7704 	& 0.0003 	& 2	& V	& $-$0.0015&\\
V381 Cas 	& 52968.7011 	& 0.0005 	& 1	& V	& 0.0000&\\
V389 Cas 	& 52898.9432 	& 0.0006 	& 2	& V	& 0.0000  & Sec. E=52898.9432\\
         	& 52928.8808 	& 0.0004 	& 2	& V	& +0.0005&\\
V396 Cas 	& 52824.84721	& 0.00024	& 1	& V	& +0.00216&\\
         	& 52835.8582 	& 0.0003 	& 1	& V	& +0.0023&\\
         	& 52868.89072	& 0.00025	& 1	& V	& +0.00207&\\
V459 Cas 	& 52827.8775 	& 0.0004 	& 1	& V	& $-$0.0075&\\
V651 Cas 	& 52817.87187	& 0.00007	& 1	& V	& 0.00000&\\
         	& 52823.85279	& 0.00013	& 1	& V	& +0.00006&\\
VZ Cep   	& 52809.8384 	& 0.0003 	& 1	& V	& +0.0003&\\
         	& 52812.79737	& 0.00024	& 2	& V	& +0.00086 & Sec. phase=0.5\\
         	& 52818.7140 	& 0.0006 	& 2	& V	& +0.0007&\\
         	& 52863.68060	& 0.00018	& 2	& V	& $-$0.00054&\\
         	& 52877.8838 	& 0.0006 	& 2	& V	& +0.0023&\\
         	& 52889.71630	& 0.00021	& 2	& V	& +0.00116&\\
}
}

{\small
\IBVSEmin{
V456 Cyg 	& 52831.86188	& 0.00014	& 2	& V	& +0.00094 & Sec. phase=0.5\\
         	& 52836.7625 	& 0.0004 	& 1	& V	& 0.0000&\\
         	& 52839.8814 	& 0.0004 	& 2	& V	& $-$0.0003&\\
         	& 52869.7371 	& 0.0003 	& 1	& V	& +0.0005&\\
         	& 52931.6733 	& 0.0003 	& 2	& V	& $-$0.0012&\\
V1061 Cyg	& 52786.7736 	& 0.0004 	& 2	& V	& $-$0.0012  & Sec. phase=0.5\\
         	& 52813.7610 	& 0.0002 	& 1	& V	& $-$0.0001&\\
         	& 52834.8804 	& 0.0004 	& 1	& V	& $-$0.0004&\\
         	& 52867.7336 	& 0.0003 	& 1	& V	& $-$0.0001&\\
         	& 52887.6813 	& 0.0004 	& 2	& V	& +0.0012&\\
         	& 52907.62597	& 0.00014	& 1	& V	& +0.00309  &?\\
HD 23642 	& 52931.9078 	& 0.0020 	& 2	& V	& +0.0051  & Sec. phase=0.5\\
LV Her   	& 52785.7012 	& 0.0010 	& 1	& V	& +0.0001&\\
RW Lac   	& 52844.71005	& 0.00021	& 1	& V	& $-$0.00239&\\
         	& 52927.66310	& 0.00018	& 1	& V	& $-$0.00310&\\
         	& 52932.77471	& 0.00017	& 2	& V	& $-$0.00817 & Sec. E=51076.6925\\
V506 Oph 	& 52831.63476	& 0.00020	& 1	& V	& +0.00043&\\
         	& 52858.6752 	& 0.0005 	& 2	& V	& 0.0000  & Sec. phase=0.5\\
FO Ori   	& 52914.8345 	& 0.0004 	& 1	& V	& $-$0.0001&\\
V648 Ori 	& 52908.9049 	& 0.0006 	& 1	& V	& +0.0000&\\
         	& 52930.86274	& 0.00020	& 2	& V	& +0.00057 & Sec. phase=0.5\\
         	& 52934.92834	& 0.00025	& 1	& V	& 0.00000&\\
IM Per   	& 52902.9245 	& 0.0006 	& 1	& V	& 0.0000&\\
         	& 52910.8277 	& 0.0007 	& 2	& V	& 0.0000  & Sec. E=52910.8277\\
         	& 52972.8038 	& 0.0004 	& 1	& V	& $-$0.0015&\\
         	& 52980.7065 	& 0.0006 	& 2	& V	& $-$0.0020&\\
         	& 52981.8219 	& 0.0004 	& 1	& V	& $-$0.0003&\\
V482 Per 	& 52644.8308 	& 0.0011 	& 2	& V	& +0.0016  & Sec. phase=0.5\\
         	& 52907.8584 	& 0.0004 	& 1	& V	& +0.0030&\\
V514 Per 	& 52974.6667 	& 0.0005 	& 1	& V	& +0.0001&\\
RXJ0212.3	& 52634.6593 	& 0.0009 	& 1	& V	& 0.0000&\\
AQ Ser   	& 52823.7250 	& 0.0007 	& 2	& V	& $-$0.0007  & Sec. phase=0.5\\
         	& 52834.6937 	& 0.0005 	& 1	& V	& 0.0000&\\
CF Tau   	& 52933.8960 	& 0.0005 	& 2	& V	& +0.0038  & Sec. phase=0.5\\
V1094 Tau	& 52628.8429 	& 0.0003 	& 2	& V	& $-$0.0002  & Sec. E=52601.8776\\
         	& 52637.83153	& 0.00021	& 2	& V	& $-$0.00002&\\
BP Vul   	& 52782.8192 	& 0.0003 	& 1	& V	& $-$0.0009&\\
         	& 52814.7964 	& 0.0005 	& 2	& V	& $-$0.0009  & Sec. E=52098.80834\\
         	& 52817.74512	& 0.00010	& 1	& V	& $-$0.00130&\\
BT Vul   	& 52831.72890	& 0.00024	& 1	& V	& 0.00000&\\
         	& 52839.71853	& 0.00020	& 1	& V	& +0.00123&\\
         	& 52843.7114 	& 0.0004 	& 2	& V	& $-$0.0001  & Sec. phase=0.5\\
         	& 52908.7621 	& 0.0004 	& 2	& V	& +0.0022&\\
         	& 52939.5741 	& 0.0003 	& 2	& V	& +0.0018&\\
}
}

A sample of the observations has been published by Lacy, Hood \& Straughn (2001). 

\references

Kaiser, D. H. \& Frey, G., 1998, {\it IBVS}, No. 4544

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

Lacy, C. H. S., 2002, {\it IBVS}, No. 5357

Lacy, C. H. S., Hood, B. \& Straughn, A., 2001, {\it IBVS}, No. 5067

Lacy, C. H. S., Straughn, A. \& Denger, F., 2002, {\it IBVS}, No. 5251

Lacy, C. H. S., Torres, G., Claret, A. \& Sabby, J. A., 2003, {\it AJ}, {\bf 126}, 1905

Torres, G., 2003, private communication

\endreferences

\end{document}
