\documentstyle[twoside]{article}

\input ibvs2.sty

\begin{document}

\IBVShead{5745}{2 January 2007}

\IBVStitletl{Precise Times of Minimum Light}{ of Neglected Eclipsing Binaries}

\IBVSauth{Smith, A.B.; Caton, D.B.}

\IBVSinsto{Dark Sky Observatory, Dept.\ of Physics and Astronomy,
Appalachian State University, Boone, North Carolina 28608,
U.S.A., email: catondb@appstate.edu, adam.blythe.smith@gmail.com}

\SIMBADobj{RT And} 
\SIMBADobj{RX Ari} 
\SIMBADobj{WW Aur}
\SIMBADobj{AR Aur} 
\SIMBADobj{CL Aur} 
\SIMBADobj{EO Aur}
\SIMBADobj{HL Aur} 
\SIMBADobj{YZ Aql} 
\SIMBADobj{V1182 Aql}
\SIMBADobj{44 Boo} 
\SIMBADobj{BW Boo} 
\SIMBADobj{UW Boo}
\SIMBADobj{AW Cam} 
\SIMBADobj{CV CMa} 
\SIMBADobj{CC Cas}
\SIMBADobj{IT Cas} 
\SIMBADobj{V527 Cas} 
\SIMBADobj{GK Cep}
\SIMBADobj{SS Cet} 
\SIMBADobj{TV Cet} 
\SIMBADobj{WW Cyg}
\SIMBADobj{DX Cyg} 
\SIMBADobj{V463 Cyg} 
\SIMBADobj{V469 Cyg}
\SIMBADobj{V490 Cyg} 
\SIMBADobj{V498 Cyg} 
\SIMBADobj{V512 Cyg}
\SIMBADobj{V541 Cyg} 
\SIMBADobj{V873 Cyg} 
\SIMBADobj{V959 Cyg}
\SIMBADobj{V974 Cyg} 
\SIMBADobj{V1136 Cyg} 
\SIMBADobj{V1326 Cyg}
\SIMBADobj{V1436 Cyg} 
\SIMBADobj{Z Dra} 
\SIMBADobj{RR Dra}
\SIMBADobj{BF Dra} 
\SIMBADobj{CM Dra} 
\SIMBADobj{DI Her}
\SIMBADobj{VZ Hya} 
\SIMBADobj{CM Lac} 
\SIMBADobj{MZ Lac}
\SIMBADobj{V345 Lac} 
\SIMBADobj{V412 Lyr} 
\SIMBADobj{V431 Lyr}
\SIMBADobj{RU Mon} 
\SIMBADobj{TV Mon} 
\SIMBADobj{U Oph}
\SIMBADobj{WZ Oph} 
\SIMBADobj{V451 Oph} 
\SIMBADobj{EW Ori}
\SIMBADobj{DV Peg} 
\SIMBADobj{IQ Per} 
\SIMBADobj{KX Pup}
\SIMBADobj{ER Sct} 
\SIMBADobj{AN Tau} 
\SIMBADobj{DR Vul}
\SIMBADobj{FQ Vul} 
\SIMBADobj{GP Vul} 
\SIMBADobj{MN Vul}

\begintext

We present 102 times of minimum light for 60 mostly neglected eclipsing binaries, as a
continuation of an ongoing program of monitoring eccentric orbit, apsidal motion and other
type systems. This is the first publication in our goal to also release all of our previously
unpublished minimums in our archives.  As part of this project we are including times of
minimum light from CCDs as well as from photoelectric photometers.

These stars were observed during several seasons and are presented for their long-term value
as well as for planning new observations.  All data were obtained at Appalachian State
University's Dark Sky Observatory.  The CCD observations include measurements made with the
32-inch DFM Engineering telescope and Photometrics CH250 CCD camera with a Tek 1024$^2$ chip
and Bessell filter set. Other data were obtained with the 18-inch telescope with a
Photometrics CH350 CCD camera and SITe 1024$^2$ chip and Bessell filter set. Some other data
were obtained with an SBIG ST-9E CCD on the 16-inch DFM telescope.  These are noted in the
table as 32, 18, and 16, respectively.  The filters are the Johnson equivalents in the Bessell
set, with `C' representing a clear or no filter.

The photoelectric times of minimum light were observed with the 18-inch telescope with a Kitt
Peak National Observatory single-channel design employing a thermoelectrically cooled EMI
9865QB photomultiplier tube with matching UBVR filters.  One eclipse's data (U Oph) was
obtained on the 32-inch with an Optec SSP-3 PIN-diode photomultiplier with Johnson filters,
and in fact was the first scientific data obtained with that telescope.

The CCD data in this publication were reduced using Mira AP software.\IBVSfm\ All of our
times of minimum and their standard errors, including the photoelectric data and its errors,
were calculated using the method of Kwee \& van Woerden (1956), using an algorithm by Ghedini
(1982).
\IBVSfoot{The Mira AP software is produced by Mirametrics Inc., formerly Axiom Research Inc.}

We are grateful for references provided by Greg Shelton and Brenda Corbin at the U.S. Naval
Observatory Library.  Other references were obtained at the NASA Astrophysics Data System.
This work also made use of the SIMBAD data base and the Space Telescope Science Institute's
Digitized Sky Survey.  We thank Joe Pollock and Stephen Davis for the development of PMIS
macros used in automatic data acquisition, and Lee Hawkins for instrumentation support.  We
especially thank the other people who observed or reduced the data including Wanda Burns,
Brain Walls, Jeff Deal, and Nathan Bergey.

\begin{table}
\begin{center}
\normalsize
\begin{tabular}{llllllll}
\hline Star&Type&Filters&HJD${}-2400000$&Error&Tel&Instr.\\
\hline

RT And & pri & V & 47770.8088 & 0.0008 & 18 & KPmt \\
 & sec & V & 48159.8005 & 0.0004 & 18 & KPmt \\
 & pri & V & 48191.5596 & 0.0002 & 18 & KPmt \\

RX Ari & pri & V & 47855.7043 & 0.0004 & 18 & KPmt \\

WW Aur & pri & V & 47893.6516 & 0.0001 & 18 & KPmt \\
 & sec & V & 48225.6955 & 0.0002 & 18 & KPmt \\

AR Aur & sec & V & 48699.5808 & 0.0004 & 18 & KPmt \\

CL Aur & pri & V & 53388.6336 & 0.0001 & 32 & CCD \\

EO Aur & pri & V & 53341.8412 & 0.0002 & 18 & CCD \\

HL Aur & pri & V & 50110.7977 & 0.0002 & 32 & CCD \\
 & sec & V & 53017.5775 & 0.0001 & 32 & CCD \\

YZ Aql & pri & V & 51071.6657 & 0.0003 & 32 & CCD \\

V1182 Aql & pri & V & 53210.7055 & 0.0007 & 32 & CCD \\

44i Boo & pri & V & 48357.8176 & 0.0003 & 18 & KPmt \\

BW Boo & sec & VBRI & 52815.6886 & 0.0015 & 18 & CCD \\

UW Boo & pri & V & 50512.7317 & 0.0002 & 18 & CCD \\
 & pri & V & 50518.7590 & 0.0002 & 18 & CCD \\
 & sec & VBRI & 52757.7543 & 0.0009 & 32 & CCD \\
 & pri & V & 53470.5926 & 0.0001 & 32 & CCD \\

AW Cam & pri & V & 47919.7904 & 0.0002 & 18 & KPmt \\
 & sec & V & 47972.6246 & 0.0008 & 18 & KPmt \\
 & pri & V & 47994.6094 & 0.0002 & 18 & KPmt \\

CV CMa & pri & V & 53442.6562 & 0.0007 & 32 & CCD \\
 & sec & V & 53451.5749 & 0.0006 & 32 & CCD \\

CC Cas & pri & V & 53016.6817 & 0.0006 & 18 & CCD \\

IT Cas & sec & V & 52592.5766 & 0.0001 & 32 & CCD \\

V527 Cas & pri & V & 53344.5257 & 0.0002 & 32 & CCD \\

GK Cep & pri & V & 48521.6067 & 0.0005 & 18 & KPmt \\
 & sec & V & 48526.7590 & 0.0003 & 18 & KPmt \\
 & pri & V & 48902.6232 & 0.0003 & 18 & KPmt \\

SS Cet & pri & V & 51551.7012 & 0.0008 & 32 & CCD \\

TV Cet & sec & V & 50110.6454 & 0.0005 & 32 & CCD \\

WW Cyg & pri & V & 51024.6271 & 0.0000 & 32 & CCD \\

DX Cyg & pri & V & 50685.5730 & 0.0009 & 32 & CCD \\
 & pri & V & 50726.6848 & 0.0002 & 32 & CCD \\
 & sec & V & 52911.6830 & 0.0017 & 32 & CCD \\

V463 Cyg & sec & V & 53577.7470 & 0.0003 & 16 & CCD \\
 & pri & V & 53578.8125 & 0.0002 & 16 & CCD \\

V469 Cyg & pri & V & 53594.5918 & 0.0004 & 32 & CCD \\

V490 Cyg & sec & V & 51491.5776 & 0.0004 & 32 & CCD \\
 & pri & V & 51495.5994 & 0.0002 & 32 & CCD \\

V498 Cyg & sec & V & 53584.6639 & 0.0003 & 32 & CCD \\

V512 Cyg & sec & V & 53619.5818 & 0.0003 & 32 & CCD \\
 & pri & V & 53625.6438 & 0.0001 & 32 & CCD \\

V541 Cyg & pri & V & 53578.7911 & 0.0001 & 16 & CCD \\

V873 Cyg & pri & V & 53598.7008 & 0.0002 & 32 & CCD \\

V959 Cyg & pri & V & 50664.7335 & 0.0004 & 32 & CCD \\

V974 Cyg & sec & V & 50584.7872 & 0.0010 & 32 & CCD \\
 & pri & V & 50967.7694 & 0.0001 & 32 & CCD \\

V1136 Cyg & pri & V & 53594.7403 & 0.0002 & 32 & CCD \\
 & sec & V & 53603.7318 & 0.0003 & 32 & CCD \\

V1326 Cyg & sec & V & 50661.6760 & 0.0010 & 32 & CCD \\
 & pri & V & 53588.8343 & 0.0005 & 32 & CCD \\

V1436 Cyg & pri & VBR & 52845.7191 & 0.0004 & 32 & CCD \\
 & sec & VRI & 52895.7110 & 0.0023 & 32 & CCD \\
\hline
\end{tabular}
\end{center}
\end{table}

\begin{table}
\begin{center}
\normalsize
\begin{tabular}{llllllll}
\hline Star& Type& Filters& HJD${}-2400000$& Error& Tel& Instr.\\
\hline

Z Dra & pri & V & 52708.5681 & 0.0000 & 32 & CCD \\
 & sec & VBR & 52710.6064 & 0.0011 & 32 & CCD \\
 & pri & V & 52769.6520 & 0.0001 & 32 & CCD \\
 & sec & VBRI & 52771.6911 & 0.0011 & 32 & CCD \\
 & pri & VBRI & 52773.7243 & 0.0001 & 32 & CCD \\
 & pri & VBRI & 53502.6609 & 0.0001 & 18 & CCD \\

RR Dra & pri & V & 51043.6183 & 0.0000 & 32 & CCD \\

BF Dra & pri & V & 53341.5523 & 0.0001 & 32 & CCD \\

CM Dra & pri & R & 53478.6467 & 0.0001 & 32 & CCD \\

DI Her & sec & V & 52812.7354 & 0.0001 & 18 & CCD \\
 & pri & V & 52899.5675 & 0.0001 & 32 & CCD \\

VZ Hya & pri & V & 47971.5876 & 0.0003 & 18 & KPmt \\
 & pri & V & 52702.6936 & 0.0001 & 32 & CCD \\

CM Lac & sec & V & 48210.6531 & 0.0002 & 18 & KPmt \\
 & pri & V & 48530.7850 & 0.0004 & 18 & KPmt \\

MZ Lac & pri & V & 50422.6427 & 0.0002 & 32 & CCD \\
 & sec & V & 50686.6745 & 0.0008 & 32 & CCD \\
 & pri & V & 50722.7286 & 0.0004 & 32 & CCD \\
 & pri & V & 53025.5097 & 0.0002 & 32 & CCD \\

V345 Lac & pri & V & 50373.8088 & 0.0006 & 32 & CCD \\
 & pri & V & 50403.7826 & 0.0009 & 32 & CCD \\
 & pri & V & 51377.7229 & 0.0002 & 32 & CCD \\
 & pri & VB & 51849.7155 & 0.0003 & 32 & CCD \\
 & pri & V & 53572.8447 & 0.0002 & 32 & CCD \\

V412 Lyr & pri & V & 50666.7391 & 0.0001 & 32 & CCD \\
 & sec & V & 50672.7933 & 0.0010 & 32 & CCD \\

V431 Lyr & pri & V & 53499.7379 & 0.0003 & 32 & CCD \\
 & sec & V & 53576.7384 & 0.0006 & 32 & CCD \\
 & pri & VBRI & 53587.6718 & 0.0004 & 32 & CCD \\

RU Mon & pri & C & 50138.6517 & 0.0002 & 32 & CCD \\

TV Mon & pri & V & 51489.8738 & 0.0001 & 32 & CCD \\

U Oph$^*$ & pri & V & 49862.7335 & 0.0001 & 32 & SSP3 \\

WZ Oph & sec & V & 48004.7536 & 0.0002 & 18 & KPmt \\
 & sec & V & 53476.7886 & 0.0001 & 32 & CCD \\

V451 Oph & sec & V & 53575.7235 & 0.0001 & 18 & CCD \\

EW Ori & sec & V & 50431.6804 & 0.0001 & 32 & CCD \\
 & pri & V & 52973.8223 & 0.0001 & 32 & CCD \\

DV Peg & pri & V & 53604.6143 & 0.0002 & 32 & CCD \\

IQ Per & pri & V & 51937.6525 & 0.0006 & 18 & CCD \\

KX Pup & pri & V & 53077.5933 & 0.0006 & 32 & CCD \\

ER Sct & sec & V & 53224.7529 & 0.0001 & 16 & CCD \\

AN Tau & pri & V & 53344.7797 & 0.0001 & 32 & CCD \\

DR Vul & sec & V & 50376.7009 & 0.0002 & 32 & CCD \\

FQ Vul & pri & VBR & 53595.8065 & 0.0005 & 32 & CCD \\

GP Vul & sec & V & 50985.7005 & 0.0001 & 32 & CCD \\
 & pri & V & 51061.5885 & 0.0001 & 32 & CCD \\

MN Vul & pri & V & 53492.7941 & 0.0012 & 32 & CCD \\
\hline
\end{tabular}
\end{center}
{\normalsize $^*$ The comparison star used for U Oph is designated as variable star V2368 Oph.  
From our own measurments it seems likely that this star is not significantly variable.  Also,
this same comparison star was used by Jordi et al.\ (1996) and Wolf et al.\ (2002), without
problems reported.}
\end{table}

We are also grateful for support received from the National Science Foundation, the ASU
Research Council and Office of Undergraduate Research, and the Dunham Fund for Astrophysical
Research.  Also, we thank the American Astronomical Society's Small Research Grant program for
providing instrumentation for the photoelectric research.

\references 

Ghedini, S., 1982, {\it Software for Photometric Astronomy}, Willmann-Bell, U.S.A., 47

Jordi, C., Ribas I., Garcia, J.M., 1996, {\it IBVS}, No.\ 4300

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

Wolf, M., Harmanec, P., Diethelm, R., Hornoch, K., Eenens, P., 2002, {\it Astron.\
Astrophys.}, {\bf 383}, 533

\endreferences

\vfill

\IBVSerratum{5707}

Time of minimum of RZ~Com was given as 52849.4809, but it should be
53849.4809.

\bigskip

\emph{S. Serkan Do\v{g}ru}

\end{document}
