\documentstyle[twoside]{article}

\input{ibvs2.sty}

\begin{document}

\IBVShead{4887}{25 April 2000}

\IBVStitle{CCD Times of Minima of Faint Eclipsing Binaries I}

\IBVSauth{\v{S}af\'{a}\v{r}, Jan; Zejda, Miloslav}

\IBVSinsto{N.~Copernicus Observatory and Planetarium, Krav\'{\i} hora
2, Brno, Czech Republic\\ \indent e-mail: safarplanetar@email.cz, zejda@sci.muni.cz}

\IBVStyp{ eclipsing binary }
\IBVSkey{eclipsing binaries -- timings of minima}

\begintext

The list given below contains 114 times of minima of 68
individual eclipsing binaries obtained during 1995--1997. All
minima have been obtained by means of a SBIG ST~7 CCD camera
attached to the 400-mm $f/1750$ Newton reflector at the N.
Copernicus Observatory and Planetarium Brno, only several
observations have been done by smaller instruments or by means of CCD
camera SBIG ST~4 (see column Notes in the Table 1).

One of the purposes of the observing programs of our observatory is to
derive timings of minima mainly of relatively faint stars
(fainter than 12 mag in the minimum). The aim of our observations was
to obtain times of minima and new information about the shape of the
light curve of (neglected) eclipsing binaries. The observed
stars were chosen mainly from the observing program of B.R.N.O. --
Variable Star Section of Czech Astronomical Society. Detailed
description and results of the running observational program can be
found in Contributions of N. Copernicus Observatory and Planetarium
Brno.

The camera was used without any filter so that only magnitudes in the
instrumental, red sensitive (close to R-band) system could be
obtained. The exposures ran mostly 60~s. The MUNIDOS software
packet (Hroch \& Nov\'{a}k, 1997) was used for observation
processing. The results are given in the Table~1. The following data
are given: The name of the star, the heliocentric JD of minimum
($-\,2400000$), the error of the determination of minimum obtained
by the Gaspani's (1995) method having the meaning of a standard
deviation of the determination, the abbreviation of the name of the
observer(s), the total number of images used, the number of images
(points) on the descending branch, the epoch and the $O-C$ value
relative to the linear light elements taken from the 4th edition of the
GCVS (Kholopov et al., 1985) or to another light elements. The cases of
missing or wrong light elements in GCVS are marked by (*) at the name
of the star. The others than GCVS's elements are given in the Table 2.
The majority of minima given in the Table 1 are primary ones.
Secondary minima are marked in the column {\it Notes\/}. The times of
minima obtained by superposition of two or more parts of light curve
from different nights are denoted as ``normal min.''\ in the Table 1.

\references

Gaspani, A., 3rd GEOS workshop on variable star data acquisition and
processing techniques, 13-14 May 1995, S. Pellegrino Terme, Italy

Hroch, F., Nov\'{a}k, R., 1997, MUNIDOS, {\tt http://ian.cz/munipack/}

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

\newpage

\small

\begin{center}
Table 1: Times of minima of observed systems
\vskip 2mm
\begin{tabular}{lcccccrrl}
\hline
Starname & JDhel & Error & Observer& Tot\,$N$ & Desc\,$N$ & Epoch & $O-C$ & Notes \\
\hline
DO And & 50773.3462 & 0.0014 & J\v{S} & 25 & 10 & 21904.5 & $-$0.0078 & sec.~min. \\
HS And & 50773.3166 & 0.0014 & J\v{S} & 35 & 25 & 5357.0 & 0.1976 & \\
MO And* & 50688.5397 & 0.0028 & J\v{S} & 24 & 9 & 6605.0 & 0.1579 & \\
 & 50773.4726 & 0.0021 & J\v{S} & 45 & 32 & 6649.0 & 0.1516 & \\
NSV14578 And* & 50713.5217 & 0.0035 & J\v{S} & 48 & 26 & 15972.0 & $-$0.0570 & \\
UU Aqr* & 50012.2867 & 0.0003 & E\v{S} & 39 & 19 & 22405.0 & 0.0305 & \\
 & 50311.4758 & 0.0009 & J\v{S} & 19 & 10 & 24234.0 & 0.0335 & filter I \\
V873 Aql & 50662.5020 & 0.0090 & MZ & 20 & 13 & 33591.0 & 0.0230 & \\
 & 50667.4136 & 0.0104 & MZ, J\v{S} & 16 & 7 & 33605.0 & $-$0.0714 & \\
V1075 Aql & 50662.5283 & 0.0042 & MZ & 15 & 10 & 26138.0 & $-$0.0101 & \\
 & 50693.3596 & 0.0014 & J\v{S} & 26 & 8 & 26173.0 & $-$0.0131 & \\
V1299 Aql & 49932.4548 & 0.0031 & E\v{S} & 33 & 15 & 5969.0 & $-$0.0301 & \\
V1355 Aql & 49940.5474 & 0.0025 & E\v{S} & 30 & 6 & 28136.0 & $-$0.1474 & \\
 & 50000.3810 & 0.0020 & E\v{S} & 26 & 8 & 28252.0 & $-$0.1462 & \\
 & 50029.2634 & 0.0026 & E\v{S} & 16 & 8 & 28308.0 & $-$0.1484 & \\
SU Boo & 50235.5048 & 0.0038 & J\v{S} & 49 & 28 & 18680.0 & $-$0.0048 & RL150 \\
AR Boo & 50180.4108 & 0.0028 & J\v{S} & 36 & 17 & 32441.0 & 0.1400 & normal min. \\
AB Cas & 50750.3718 & 0.0021 & J\v{S} & 20 & 10 & 5879.0 & 0.0580 & \\
AE Cas & 50708.4521 & 0.0014 & J\v{S} & 15 & 4 & 33324.0 & 0.0705 & \\
CV~Cas & 50660.4749 & 0.0021 & J\v{S} & 29 & 16 & 4770.0 & 0.4751 & \\
EP Cas & 50773.2449 & 0.0014 & J\v{S} & 20 & 9 & 27776.0 & $-$0.0299 & \\
MS Cas & 50601.4068 & 0.0021 & J\v{S} & 10 & 4 & 13239.0 & 0.0319 & \\
 & 50750.3501 & 0.0014 & J\v{S} & 24 & 13 & 13366.0 & 0.0377 & \\
V357 Cas & 50773.3475 & 0.0028 & J\v{S} & 16 & 7 & 28021.0 & $-$0.0562 & \\
V360 Cas & 50750.4661 & 0.0014 & J\v{S} & 32 & 20 & 12931.0 & $-$0.0872 & \\
V702 Cas* & 50660.5150 & 0.0049 & J\v{S} & 27 & 18 & 4240.0 & 0.0011 & \\
NSV14647 Cas* & 50671.5404 & 0.0028 & J\v{S} & 25 & 14 & 22452.0 & 0.0279 & \\
 & 50750.2849 & 0.0014 & J\v{S} & 39 & 20 & 22534.0 & 0.0302 & \\
 & 50773.3254 & 0.0028 & J\v{S} & 35 & 18 & 22558.0 & 0.0242 & \\
AE Cyg & 49925.4765 & 0.0028 & E\v{S} & 19 & 10 & 5509.0 & $-$0.0047 & \\
PV~Cyg & 50658.4538 & 0.0021 & J\v{S} & 30 & 16 & 20812.0 & 0.1915 & \\
V370 Cyg & 50752.3584 & 0.0028 & J\v{S} & 28 & 12 & 20816.0 & $-$0.0090 & \\
V435 Cyg & 50688.5497 & 0.0042 & J\v{S}, MZ & 16 & 10 & 3666.0 & 0.1670 & \\
V443 Cyg & 50234.4466 & 0.0030 & J\v{S} & 51 & 28 & 27597.0 & 0.0240 & RL150 \\
V706 Cyg & 49987.5056 & 0.0024 & E\v{S} & 15 & 8 & 21171.0 & $-$0.0275 & \\
 & 50604.3658 & 0.0021 & J\v{S} & 10 & 4 & 22494.0 & $-$0.0239 & \\
 & 50624.4135 & 0.0014 & J\v{S} & 16 & 6 & 22537.0 & $-$0.0252 & \\
 & 50658.4507 & 0.0021 & J\v{S} & 18 & 11 & 22610.0 & $-$0.0247 & \\
 & 50671.5074 & 0.0021 & J\v{S} & 13 & 6 & 22638.0 & $-$0.0231 & \\
 & 50693.4161 & 0.0014 & J\v{S} & 16 & 8 & 22685.0 & $-$0.0284 & \\
V1048 Cyg & 50609.4406 & 0.0014 & J\v{S} & 27 & 14 & 30876.0 & 0.0164 & \\
 & 50658.4289 & 0.0014 & J\v{S} & 22 & 11 & 30942.0 & 0.0179 & \\
V1130 Cyg & 49926.4487 & 0.0022 & E\v{S} & 21 & 9 & 30405.0 & $-$0.0279 & \\
 & 50708.4090 & 0.0028 & J\v{S} & 16 & 10 & 31795.0 & $-$0.0277 & \\
 & 50713.4734 & 0.0014 & J\v{S} & 12 & 6 & 31804.0 & $-$0.0264 & \\
V1321 Cyg & 50240.4371 & 0.0041 & J\v{S} & 41 & 30 & 36892.0 & 0.0471 & RF150 \\
 & 50643.4928 & 0.0056 & J\v{S} & 16 & 8 & 37999.0 & 0.0551 & \\
 & 50671.5308 & 0.0028 & J\v{S} & 22 & 10 & 38076.0 & 0.0582 & \\
 & 50752.3538 & 0.0014 & J\v{S} & 22 & 15 & 38298.0 & 0.0532 & \\
 & 50707.5757 & 0.0056 & J\v{S} & 14 & 7 & 38175.0 & 0.0581 & \\
V1414 Cyg & 50667.4503 & 0.0056 & MZ, J\v{S} & 21 & 10 & 30656.0 & 0.0396 & \\
 & 50686.4315 & 0.0035 & J\v{S} & 24 & 11 & 30683.0 & 0.0364 & \\
 & 50693.4663 & 0.0014 & J\v{S} & 32 & 16 & 30693.0 & 0.0400 & \\
V1723 Cyg & 50671.4236 & 0.0021 & J\v{S} & 8 & 4 & 8967.0 & 0.0359 & \\
V1856 Cyg* & 50196.5539 & 0.0025 & J\v{S} & 31 & 15 & 2279.0 & 0.0107 & \\
 & 50752.3265 & 0.0022 & J\v{S} & 29 & 11 & 2557.0 & 0.0112 & \\
V1870 Cyg* & 50657.3811 & 0.0026 & J\v{S} & 20 & 11 & 11917.0 & $-$0.0148 & \\
V1908 Cyg* & 50658.3742 & 0.0021 & J\v{S} & 25 & 10 & 3128.0 & $-$0.1565 & \\
\hline
\end{tabular}
\end{center}

\newpage

\begin{center}
Table 1 (cont.)
\vskip2mm
\begin{tabular}{lcccccrrl}
\hline
Starname & JDhel & Error & Observer& Tot\,$N$ & Desc\,$N$ & Epoch & $O-C$ & Notes \\
\hline
XY Dra & 50601.4788 & 0.0021 & J\v{S} & 40 & 12 & 10743.0 & 0.4063 & \\
V502 Her & 50643.4751 & 0.0021 & J\v{S} & 18 & 7 & 53361.0 & 0.0028 & \\
V719 Her & 50284.4245 & 0.0019 & J\v{S} & 49 & 19 & 25862.0 & $-$0.1234 & RF150 \\
BS Lac & 50671.5431 & 0.0042 & J\v{S} & 33 & 21 & 4536.0 & $-$0.2081 & \\
 & 50688.4270 & 0.0048 & MZ, J\v{S} & 20 & 9 & 4542.0 & $-$0.2094 & \\
EL Lac & 50609.4717 & 0.0028 & J\v{S} & 27 & 19 & 8945.0 & 0.1393 & \\
EQ Lac & 50643.4101 & 0.0021 & J\v{S} & 14 & 7 & 6853.0 & 0.0952 & \\
IP Lac & 50601.4654 & 0.0014 & J\v{S} & 20 & 9 & 19647.5 & 0.0641 & sec.~min. \\
 & 50604.4447 & 0.0014 & J\v{S} & 24 & 10 & 19651.0 & 0.0614 & \\
 & 50624.4686 & 0.0021 & J\v{S} & 17 & 7 & 19674.5 & 0.0630 & sec.~min. \\
 & 50688.3722 & 0.0067 & MZ & 13 & 7 & 19749.5 & 0.0658 & sec.~min. \\
V344 Lac & 50658.3828 & 0.0014 & J\v{S} & 18 & 12 & 13859.0 & $-$0.0641 & \\
DU Leo* & 49811.4763 & 0.0041 & J\v{S} & 33 & 21 & 1064.5 & $-$0.0011 & sec.~min.,\\
& & & & & & & & RF35+ST4 \\
AH Lyn* & 50184.4602 & 0.0025 & J\v{S} & 54 & 29 & 12335.0 & $-$0.0038 & \\
DU Lyr & 50196.5354 & 0.0034 & J\v{S} & 33 & 22 & 24387.0 & 0.1464 & \\
 & 50597.4615 & 0.0014 & J\v{S} & 23 & 15 & 24866.0 & 0.1495 & \\
ET Lyr & 50686.4243 & 0.0042 & J\v{S} & 34 & 6 & 6347.0 & $-$0.0647 & \\
FL Lyr & 49909.5271 & 0.0029 & J\v{S} & 25 & 16 & 5366.0 & $-$0.0019 & RF35 \\
PY Lyr & 50713.4200 & 0.0021 & J\v{S} & 18 & 10 & 14501.0 & 0.1223 & \\
V401 Lyr & 50643.3897 & 0.0014 & J\v{S} & 33 & 9 & 14819.5 & 0.0044 & sec.~min. \\
V839 Oph & 49919.4266 & 0.0040 & J\v{S} & 28 & 5 & 23157.0 & $-$0.0909 & RF35 \\
V981 Oph & 50604.3734 & 0.0014 & J\v{S} & 10 & 5 & 10175.0 & $-$0.0084 & \\
EF Ori & 50096.3213 & 0.0021 & J\v{S} & 26 & 10 & 6714.0 & $-$1.0755 & \\
 & 50138.4277 & 0.0023 & E\v{S} &111 & 53 & 6725.0 & 0.3177 & \\
GU Ori* & 50120.2312 & 0.0025 & J\v{S} & 25 & 8 & 14979.0 & $-$0.0025 & \\
 & 50138.3520 & 0.0031 & J\v{S} & 43 & 12 & 15017.5 & $-$0.0029 & sec.~min. \\
 & 50139.2915 & 0.0020 & J\v{S} & 37 & 18 & 15019.5 & $-$0.0048 & sec.~min. \\
 & 50147.2955 & 0.0035 & J\v{S} & 24 & 9 & 15036.5 & $-$0.0024 & sec.~min. \\
 & 50163.2988 & 0.0021 & J\v{S} & 35 & 15 & 15070.5 & $-$0.0022 & sec.~min. \\
 & 50773.5269 & 0.0014 & J\v{S} & 46 & 24 & 16367.0 & $-$0.0120 & \\
V648 Ori & 50750.5648 & 0.0010 & J\v{S} & 26 & 16 & 15219.0 & 0.0383 & \\
U Peg & 50002.4319 & 0.0048 & J\v{S} & 25 & 14 & 35996.5 & $-$0.0564 & sec.~min., RF35 \\
 & 50006.3630 & 0.0034 & J\v{S} & 28 & 10 & 36007.0 & $-$0.0605 & RF35 \\
BX Peg & 50316.3607 & 0.0007 & J\v{S} & 34 & 15 & 21828.0 & $-$0.0416 & filter R, RF150 \\
 & 50316.5003 & 0.0028 & MZ & 53 & 26 & 21828.5 & $-$0.0422 & filter R, RF150 \\
 & 50707.5502 & 0.0028 & J\v{S} & 11 & 6 & 23223.0 & $-$0.0391 & \\
 & 50713.2946 & 0.0028 & J\v{S} & 18 & 11 & 23243.5 & $-$0.0434 & sec.~min. \\
CE Peg & 50030.3720 & 0.0031 & E\v{S} & 28 & 14 & 39315.0 & $-$0.2443 & \\
 & 50660.5290 & 0.0056 & J\v{S} & 20 & 13 & 40296.5 & 0.0911 & sec.~min. \\
CU Peg & 50708.5489 & 0.0021 & J\v{S} & 48 & 27 & 1427.0 & 0.0538 & \\
ER Peg & 50708.3775 & 0.0042 & J\v{S} & 32 & 12 & 2278.0 & 0.1252 & \\
DK Per & 50750.3680 & 0.0007 & J\v{S} & 24 & 9 & 9187.0 & 0.0212 & \\
PS Per & 50713.6127 & 0.0014 & J\v{S} & 47 & 16 & 37293.0 & 0.0572 & \\
TY Tri* & 50773.3337 & 0.0021 & J\v{S} & 27 & 7 & 4435.0 & $-$0.0831 & \\
EU Vul & 50667.2998 & 0.0118 & MZ & 22 & 4 & 15752.0 & 0.0266 & normal min. \\
 & 50688.4954 & 0.0093 & MZ, J\v{S} & 15 & 9 & 15776.0 & 0.0291 & \\
FF Vul & 49940.4945 & 0.0025 & E\v{S} & 30 & 17 & 32032.5 & 0.0305 & sec.~min. \\
 & 50000.3466 & 0.0031 & E\v{S} & 27 & 13 & 32167.0 & 0.0319 & \\
 & 50713.4240 & 0.0021 & J\v{S} & 22 & 12 & 33769.5 & 0.0193 & sec.~min. \\
FM Vul & 50601.4163 & 0.0021 & J\v{S} & 15 & 9 & 8725.0 & 0.0172 & \\
GI Vul & 50597.4542 & 0.0014 & J\v{S} & 15 & 7 & 32257.0 & $-$0.0124 & \\
 & 50624.4151 & 0.0014 & J\v{S} & 13 & 7 & 32313.0 & $-$0.0145 & \\
 & 50662.4546 & 0.0069 & MZ & 19 & 9 & 32392.0 & $-$0.0122 & \\
GP Vul & 50297.5357 & 0.0019 & J\v{S} & 45 & 17 & 15202.0 & $-$0.0424 & \\
NO Vul & 50597.5005 & 0.0007 & J\v{S} & 19 & 6 & 11466.0 & $-$0.0421 & \\
 & 50652.3717 & 0.0007 & J\v{S} & 13 & 6 & 11614.0 & $-$0.0447 & \\
\hline
\end{tabular}
Observers: E\v{S}: E. \v{S}af\'{a}\v{r}ov\'{a}, J\v{S}: J. \v{S}af\'{a}\v{r}, MZ: M. Zejda \\
\end{center}

\newpage


\begin{center}
Table 2: Other published light elements used
\vskip2mm
\begin{tabular}{llll}
\hline
Starname & Basic epoch & Period & Reference \\
\hline
MO And & 2437937.852 & 1.930436 & Kinman, T.D., Mahaffey, C.T., Wirtanen, C.A., \\
 & & & 1982, {\it AJ}, {\bf 87}, 2, 314\\
NSV14578 And & 2428021.390 & 1.4207481 & H\"{a}ussler, K., 1990, {\it VSS}, {\bf 10}, No.\ 4, 374 \\
UU Aqr & 2446347.2667 & 0.163579089 & Goldader, J. D., Garnavich, P., 1989, {\it IBVS} No.\ 3361 \\
V702 Cas & 2440150.474 & 2.478783 & H\"{a}ussler, K., 1990, {\it MVS}, {\bf 12}, No.\ 4, 74 \\
NSV14647 Cas & 2429111.508 & 0.960271 & Busch, H., et al., 1990, {\it VSS}, {\bf 10}, No.\ 4, 354 \\
V1856 Cyg & 2445640.412 & 1.99918 & Margoni, R., et al., 1989, {\it AsApSuppl}, {\bf 81}, 393 \\
V1870 Cyg & 2441245.385 & 0.789797 & Margoni, R., et al., 1989, {\it AsApSuppl}, {\bf 81}, 393 \\
V1908 Cyg & 2442950.490 & 2.4642074 & Zemljannikova, S. V., 1986, {\it VS}, {\bf 22}, No.\ 3, 359 \\
DU Leo & 2448348.658 & 1.37418454 & Williams, D. B., 1994, {\it IBVS} No.\ 3999 \\
AH Lyn & 2437647.022 & 1.016412 & Kinman, T.D., Mahaffey, C.T., Wirtanen, C.A., \\
 & & & 1982, {\it AJ}, {\bf 87}, 2, 314\\
GU Ori & 2443069.903 & 0.470681 & Samolyk, G., 1985, {\it JAAVSO}, {\bf 14}, No.\ 1, 12 \\
TY Tri & 2435778.460 & 3.38105 & Meinunger, L., 1986, {\it MVS}, {\bf 11}, No.\ 1, 1 \\
\hline
\end{tabular}
\end{center}

\end{document}

