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

\input ibvst.sty
\input ibvse.sty
\input epsf.sty

\IBVShead{5232}{31 January 2002}

\begin{document}

\IBVStitletl{CCD LIGHT CURVES OF ROTSE1 VARIABLES, XIII: GSC\,3104:1384 L\lowercase{yr},}{ ROTSE1 GSC\,2632:319 L\lowercase{yr}, GSC\,3540:85 L\lowercase{yr} AND GSC\,3549:929 D\lowercase{ra}}

\IBVSauth{Bl\"attler, E.$^1$; Diethelm, R.$^2$}
   
\IBVSinst{BBSAG, Sch\"usselacher 1, CH-8636 Wald, Switzerland; e-mail: blaettler-wald@bluewin.ch}

\IBVSinst{BBSAG, Rennweg 1, CH-4118 Rodersdorf, Switzerland; e-mail: diethelm@astro.unibas.ch}

\SIMBADobj{ROTSE1 J182434.81+381740.5}
\SIMBADobj{ROTSE1 J183053.78+340814.1}
\SIMBADobj{ROTSE1 J184654.98+450054.7}
\SIMBADobj{ROTSE1 J185835.38+500928.9}

\begintext

\IBVSEobs{Private observatory Sch\"usselacher, Wald, 0.15-m Starfire refractor}

\IBVSEdet{SBIG ST-7 CCD camera}

\IBVSEred{Standard CCD-frame reduction using AIP4WIN software}

\IBVSEmethod{Kwee -- van Woerden algorithm}

{\small
\IBVSEstarlis{GSC\,3104:1384 &&&& \\
ROTSE1 J182434.81+381740.5 & EW & 18 24 34.8 & +38 17 40 & GSC\,3104:1605 / GSC\,3104:1364  \\
 GSC\,2632:319 &&&& \\
ROTSE1 J183053.78+340814.1 & EW & 18 30 53.8 & +34 08 14 & GSC\,2632:310 / GSC\,2632:263  \\
 GSC\,3540:85 &&&& \\
ROTSE1 J184654.98+450054.7 & EW & 18 46 55.0 & +45 00 55 & GSC\,3540:108 / GSC\,3130:2796  \\
 GSC\,3549:929 &&&& \\
ROTSE1 J185835.38+500928.9 & EW & 18 58 35.4 & +50 09 29 & GSC\,3549:941 / GSC\,3549:772  \\
}  
}  


\IBVSEephem{ROTSE1 J182434.81+381740.5 & 52121.3763 & 0.300395 & present paper \\
ROTSE1 J183053.78+340814.1 & 52135.5275 & 0.355682 & " \\
ROTSE1 J184654.98+450054.7 & 52146.5105 & 0.299632 & " \\
ROTSE1 J185835.38+500928.9 & 52146.5052 & 0.349668 & " \\
}

\IBVSEmin{
GSC3104:1384 (Lyr)        & 51259.8436 & 20  & p? & none && ROTSE1 \\
                        & 51312.8599 & 20  & s? & none && ROTSE1 \\
                        & 52121.3755 & 7   & p & none && \\
                        & 52121.5253 & 10  & s & none && \\
                        & 52135.3420 & 6   & s & none && \\
                        & 52135.4939 & 9   & p & none && \\
                        & 52146.4590 & 8   & s & none && \\
                        & 52171.3890 & 6   & s & none && \\
                        & 52179.3522 & 9   & p & none && \\
                        & 52181.3045 & 9   & s & none && \\
                        & 52181.4533 & 18  & p & none && \\
                        & 52187.3125 & 6   & s & none && \\
GSC2632:319 (Lyr) 	& 51297.8955 & 8   & p & none && ROTSE1 \\
                        & 52121.4790 & 6   & s & none && \\
                        & 52135.3487 & 2   & s & none && \\
                        & 52135.5276 & 16  & p & none && \\
                        & 52143.3516 & 14  & p & none && \\
                        & 52146.3771 & 9   & s & none && \\
                        & 52179.2782 & 12  & p & none && \\
                        & 52179.4563 & 5   & s & none && \\
                        & 52181.4077 & 15  & p & none && \\
                        & 52187.2813 & 9   & s & none && \\
                        & 52187.4555 & 28  & p & none && \\
GSC3540:85 (Lyr)	& 51291.8144 & 22 & s & none && ROTSE1 \\
                        & 51295.8617 & 11 & p & none && ROTSE1 \\
                        & 52121.4906 & 7  & s & none && \\
		        & 52135.4254 & 8  & p & none && \\
                        & 52143.3650 & 16 & s & none && \\
                        & 52146.3616 & 12 & s & none && \\
                        & 52146.5110 & 14 & p & none && \\
                        & 52171.3810 & 9  & p & none && \\
                        & 52179.3187 & 7  & s & none && \\
                        & 52179.4698 & 5  & p & none && \\
                        & 52181.4200 & 11 & s & none && \\
                        & 52187.4135 & 6  & s & none && \\
GSC3549:929 (Dra) 	& 51261.8434 & 10  & p & none && ROTSE1 \\
                        & 51312.7233 & 10  & s & none && ROTSE1 \\
                        & 52121.5054 & 2   & s & none && \\
                        & 52135.4915 & 10  & s & none && \\
                        & 52143.3595 & 7   & p & none && \\
                        & 52146.3321 & 18  & s & none && \\
                        & 52146.5054 & 6   & p & none && \\
                        & 52171.3344 & 17  & p & none && \\
                        & 52179.3735 & 4   & p & none && \\
                        & 52181.2972 & 14  & s & none && \\
                        & 52181.4720 & 22  & p & none && \\
                        & 52187.4128 & 14  & p & none && \\
}


\IBVSEremexp{ROTSE1: Observations of Akerlof et al. (2000).}

\IBVS2fig{7cm}{5232-f1.eps}{CCD light curve (without filter) of GSC\,3104:1384}{5232-f2.eps}{CCD light curve (without filter) of GSC\,2632:319}

\IBVS2fig{7cm}{5232-f3.eps}{CCD light curve (without filter) of GSC\,3540:85}{5232-f4.eps}{CCD light curve (without filter) of GSC\,3549:929}

\IBVSErem{
As a byproduct of the ROTSE1 CCD survey, a large number of new
variables have been discovered (Akerlof et al., 2000). In a series of papers, 
we report unfiltered CCD observations for some of the close binary systems 
(type EW) in the list of Akerlof et al. (2000). This installment 
contains information on four variables in the constellations Lyra and 
Draco. The four stars were observed with our CCD equipment
during 8 nights between JD\,2452121 and JD\,2452187. A total of 201 
CCD frames were measured of GSC\,3104:1384 (VAR\,1), 199 frames of 
GSC\,2632:319 (VAR\,2), 198 frames of GSC\,3540:85 (VAR\,3) and 195 
frames for GSC\,3549:929 (VAR\,4). Figures 1 through 4 show our 
observations folded with the elements given in the table of Ephemeris.  
These elements of variation are deduced from a linear fit to the normal 
minima from the ROTSE1 data and the timings of minimum derived from our data 
given in the table of Times of minima and also in Bl\"attler (2001).}

\IBVSEdata{Upon request from diethelm@astro.unibas.ch} %email


\IBVSEack{This research  made use of the SIMBAD data base, operated at CDS,
Strasbourg, France}        


\references

Akerlof, C., Amrose, S., Balsano, R., Bloch, J., Casperson, D., 
Fletcher, S., Gisler, G., Hills, J., Kehoe, R., Lee, B., Marshall, S., 
McKay, T., Pawl, A., Schaefer, J., Szymanski, J., Wren, J., 2000, {\it AJ}, {\bf 119}, 1901

Bl\"attler, E., 2001, {\it BBSAG Bulletin}, {\bf 126}


\end{document}


