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

\begin{document}

\IBVShead{5516}{1 April 2004}

\IBVStitletl{CCD Light Curves of ROTSE1 Variables, XX: GSC\,3510:1283 H\lowercase{er,}}{ GSC\,2618:1385 H\lowercase{er,} GSC\,2614:1369 H\lowercase{er,} AND GSC\,2615:1821 H\lowercase{er}}

\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 J173834.17+452718.4}
\SIMBADobj{ROTSE1 J173925.40+364700.9}
\SIMBADobj{ROTSE1 J174143.73+341208.9}
\SIMBADobj{ROTSE1 J174357.38+341802.5}


\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\,3510:1283 &&&& \\
ROTSE1 J173834.17+452718.4 & EW & 17 38 34.2 & +45 27 18 & GSC\,3510:1129 / GSC\,3510:1583 \\
 GSC\,2618:1385 &&&& \\
ROTSE1 J173925.40+364700.9 & EW & 17 39 25.4 & +36 47 01 & GSC\,2618:1243 / GSC\,2618:1191 \\
 GSC\,2614:1369 &&&& \\
ROTSE1 J174143.73+341208.9 & EW & 17 41 43.7 & +34 12 09 & GSC\,2615:2024 / GSC\,2614:1215 \\
 GSC\,2615:1821 &&&& \\
ROTSE1 J174357.38+341802.5 & EW & 17 43 57.4 & +34 18 02 & GSC\,2615:1861 / GSC\,2615:2174 \\
}

\IBVSEephem{ROTSE1 J173834.17+452718.4 & 52871.3786(4) & 0.2783504 & present paper \\
ROTSE1 J173925.40+364700.9 & 52898.3476(2) & 0.337146 & " \\
ROTSE1 J174143.73+341208.9 & 52898.3144(5) & 0.334711 & " \\
ROTSE1 J174357.38+341802.5 & 52907.3998(4) & 0.340092 & " \\
}

\IBVSEmin{GSC3510:1283 (Her) & 51308.7214 & 8 & p & none && ROTSE1 \\
				& 51308.8562 & 7 & s & none && ROTSE1 \\
                        & 52871.3771 & 9 & p & none && \\
                        & 52871.5177 & 18 & s & none && \\
                        & 52875.4151 & 12 & s & none && \\
                        & 52886.4074 & 13 & p & none && \\
                        & 52898.3778 & 13 & p & none && \\
                        & 52898.5178 & 13 & s & none && \\
                        & 52899.3533 & 13 & s & none && \\
				& 52907.2856 & 18 & p & none && \\
				& 52907.4259 & 21 & s & none && \\
				& 52924.4056 & 8 & s & none && \\
				& 52926.353 & 4 & s & none && \\
				& 52928.3021 & 11 & s & none && \\
GSC2618:1385 (Her) & 51308.8752 & 8 & s & none && ROTSE1 \\
                        & 51311.7411 & 9 & p & none && ROTSE1 \\
                        & 52871.3752 & 7 & p & none && \\
				& 52871.5447 & 11 & s & none && \\
                        & 52875.4215 & 7 & p & none && \\
                        & 52886.3799 & 5 & s & none && \\
                        & 52898.3467 & 11 & p & none && \\
                        & 52898.5173 & 9 & s & none && \\
                        & 52899.3591 & 4 & p & none && \\
				& 52907.2826 & 24 & s & none && \\
                        & 52924.3074 & 16 & p & none && \\
				& 52926.3303 & 19 & p & none && \\
				& 52928.3537 & 3 & p & none && \\
GSC2614:1369 (Her) & 51297.895 & 3 & s & none && ROTSE1 \\
                        & 52871.3707 & 5 & s & none && \\
				& 52871.5390 & 4 & p & none && \\
                        & 52875.3868 & 7 & s & none && \\
                        & 52886.4318 & 7 & s & none && \\
                        & 52898.3170 & 16 & p & none && \\
                        & 52898.4811 & 8 & s & none && \\
                        & 52899.318 & 4 & p & none && \\
				& 52907.3516 & 10 & p & none && \\
                        & 52924.424 & 4 & p & none && \\
				& 52926.2598 & 11 & s & none && \\
				& 52928.2711 & 11 & s & none && \\
GSC2615:1821 (Her) & 51286.865 & 4 & p? & none && ROTSE1 \\
				& 51305.7345 & 3 & s? & none && ROTSE1 \\
				& 52871.3500 & 22 & p & none && \\
                        & 52871.5209 & 3 & s & none && \\
                        & 52875.4319 & 6 & p & none && \\
                        & 52886.3144 & 8 & p & none && \\
                        & 52886.4839 & 11 & s & none && \\
                        & 52898.3874 & 5 & s & none && \\
                        & 52899.4069 & 12 & s & none && \\
                        & 52907.4008 & 15 & p & none && \\
				& 52924.4035 & 12 & p & none && \\
                        & 52926.2737 & 13 & s & none && \\
                        & 52928.3156 & 24 & s & none && \\
}
}

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


\IBVS2fig{7cm}{5516-f1.eps}{CCD light curve (without filter) of GSC\,3510:1283}{5516-f2.eps}{CCD light curve (without filter) of GSC\,2618:1385}
\IBVSfigKey{5516-f1.eps}{GSC 3510-1283}{light curve}
\IBVSfigKey{5516-f2.eps}{GSC 2618-1385}{light curve}

\IBVS2fig{7cm}{5516-f3.eps}{CCD light curve (without filter) of GSC\,2614:1369}{5516-f4.eps}{CCD light curve (without filter) of GSC\,2615:1821}
\IBVSfigKey{5516-f3.eps}{GSC 2614-1369}{light curve}
\IBVSfigKey{5516-f4.eps}{GSC 2615-1821}{light curve}

\IBVSErem{As a byproduct of the ROTSE1 CCD survey, a large number of newvariables 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 constellation Her. The four stars were observed with our CCD equipment during several nights between JD\,2452871 and JD\,2452928. A total of 185 CCD frames were measured of GSC\,3510:1283, 198 frames of GSC\,2618:1385, 193 frames of GSC\,2614:1369 as well as 195 frames of GSC\,2615:1821. 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.}

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


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

\reference

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


\end{document}
