\documentclass[twoside]{article}
\usepackage{ibvs2}
\usepackage{epsf}

\begin{document}

\IBVShead{5847}{13 August 2008}

\IBVStitle{Elements for 8 Eclipsing Binaries}

\IBVSauth{H\"{a}ussler, K.$^1$; Berthold, T.$^{1, 2}$; Kroll, P.$^2$}

\IBVSinst{Bruno-H.-B\"{u}rgel-Sternwarte, T\"{o}pelstr. 46, D-04746 Hartha, Germany}

\IBVSinst{Sternwarte Sonneberg, Sternwartestr. 32, D-96515 Sonneberg, Germany}

\indent {
\small{email: sternwartehartha@lycos.de, tb@4pisysteme.de, pk@4pisysteme.de}}

\SIMBADobj{V415 Oph}
\SIMBADobj{V760 Oph}
\SIMBADobj{V947 Oph}
\SIMBADobj{V968 Oph}
\SIMBADobj{NSV 8869}
\SIMBADobj{NSV 8970}
\SIMBADobj{NSV 9740}
\SIMBADobj{NSV 9840}

\GCVSobj{V415 Oph}
\GCVSobj{V760 Oph}
\GCVSobj{V947 Oph}
\GCVSobj{V968 Oph}
\GCVSobj{NSV 8869}
\GCVSobj{NSV 8970}
\GCVSobj{NSV 9740}
\GCVSobj{NSV 9840}

\begintext

\vspace*{-0.7cm}

\noindent{
These stars were discovered and reported to be variable by Boyce \& Huruhata (1942)
and Hoffmeister (1930, 1949, 1967).
Photographic plates of fields centered around $\alpha$~Oph and 67~Oph resp., 
taken with the Sonneberg Observatory 40cm Astrographs during three intervals spread 
over the years from 1938--1994,
were used to check the behaviour of these objects (see \mbox{Table 1}).
The given elements were obtained by means of least-squares solutions.
Photographic amplitudes were derived with respect to magnitudes of the 
comparison stars given in \mbox{Table 2.} 
An extensive list holding the times of minima derived can be retrieved as {\tt 5847-t3.txt}, using the link
in the HTML version of this paper.
Individual data are available upon request.

\IBVSedata{5847-t3.txt}
\IBVSdataKey{5847-t3.txt}{V415 Oph, V760 Oph, V947 Oph, V968 Oph, NSV 8869, NSV 8970, NSV 9740, NSV 9840}{minima times}


\vskip 2mm
\parindent0mm
{\em Remarks:}
\vskip 1mm
{\em V415 Oph}

Published times of minimum light by Hoffmeister (1930, the faintest observation only), Meinunger (1966) and Paschke
(see Diethelm, 2004) were included in our analysis. 

\vskip 1mm
{\em V760 Oph}

First elements (now contained in the GCVS) derived from four minima observed by \mbox{Mandel}
and published by Tsessevich (1960) have been found to be wrong.
The four times of minimum light published there were included in this analysis.

\vskip 1mm
{\em V947 Oph}

First elements (now contained in the GCVS)  published by G\"{o}tz et al. (1957)
have been found to be erroneous.
The ASAS database contains only 97 measurements of this star. Three very faint ones were used as times of minimum light and included in this analysis.

\vskip 1mm
{\em V968 Oph}

Both type and period previously published by of G\"{o}tz et al. (1957) and cited in the 
GCVS are erroneous. The same applies to the values given in the paper of Kraus (2007).

The period varies. Elements valid for J.D. 2429100-2447500 and J.D. 2447500-2449500 (at least, end of observations) resp.


\vskip 1mm
{\em NSV 9840}

Further investigation is needed to confirm the existence as well as the duration (d=0\fper04:) of a possible phase of constant brightness in the middle of the minimum. 




\begin{table}[!ht]
\normalsize 
\centerline{Table 1. Summary of this paper}
\vskip 3mm
\begin{center}
\begin{tabular}{llrrccccr}
\hline
Star          & Type  &   Epoch      &Period         &  Max.   & Min.I    & Min. II & D    & No. of \\
              &       &  2400000+    & (day)         &         &          &         &      & Plates   \\
\hline
V415 Oph      & EA    &52825.470     & 2.5371464    & 14\fmm5& 15\fmm5   &          & 0\fper16 &221 \\
              &       &  $\pm$16     &   $\pm$28    &         &          &          &          &\\
V760 Oph      & EA    &49193.468     & 1.5615272    & 13\fmm2 & 16\fmm4  &          & 0\fper13 &292 \\
              &       &  $\pm$10     &   $\pm$21    &         &          &          &          &\\
V947 Oph      & E     &53571.689     & 0.7977454    & 15\fmm25& 15\fmm60 &15\fmm45  &          &263 \\
              &       &   $\pm$4     &    $\pm$2    &         &          &          &          &\\
V968 Oph  (1) & E     &46609.479     & 0.7233397    & 14\fmm3 & 15\fmm2  & 15\fmm2  &          &125 \\
              &       &  $\pm$10     &    $\pm$7    &         &          &          &          &\\
V968 Oph  (2) & E     &49215.440     & 0.7232656    &         &          &          &          &32 \\
              &       &  $\pm$22     &  $\pm$199    &         &          &          &          &\\
NSV 8869      & EA    &49133.418     & 1.4340859    & 13\fmm9 & 15\fmm0  &          & 0\fper17 &283 \\
              &       &   $\pm$8     &   $\pm$19    &         &          &          &          &\\
NSV 8970      & EB    &49213.347     &  2.504273    & 14\fmm9 & 15\fmm7  & 15\fmm2  &          &268 \\
              &       &  $\pm$25     &   $\pm$11    &         &          &          &          &\\
NSV 9740      & EA    &47392.363     &  2.0421460   & 14\fmm9 & 15\fmm7  & 15\fmm0: & 0\fper15 &202 \\
              &       &  $\pm$26     &    $\pm$87   &         &          &          &          &\\
NSV 9840      & EA    &49124.518     &  5.254049    & 14\fmm7 & 16\fmm2  &          & 0\fper16 &196 \\
              &       &  $\pm$47     &    $\pm$48   &         &          &          &          &\\

\hline

\end{tabular}
\end{center}
\end{table}

\nopagebreak[4]

\begin{table}[!hb]
\centerline{Table 2. Comparison stars and cross references}
\vskip 3mm
\begin{center}
\begin{tabular}{ccrcr}
\hline
    &  V415 Oph         &     &  V760 Oph           &     \\
    &  176.1929         &     &  HV 10937           &     \\
    &  USNO 0900-11244760 &   &  USNO 0975-09180391 &     \\
\hline
Comp. No.  &  GSC    & m$^*$      & USNO          & m$^*$ \\
\hline
1   &  0900-11246767    &  14\fmm2  & 0975-09174322 & 13\fmm2\\
2   &  0900-11255289    &  14\fmm9  & 0975-09177551 & 14\fmm3\\
3   &  0900-11252628    &  15\fmm2  & 0975-09175192 & 14\fmm9\\
4   &  0900-11245022    &  15\fmm8  & 0975-09177416 & 17\fmm3\\
\hline
&&&&\\
\hline
    &  V947 Oph           &     & V968 Oph         &\\
    &  S 4199             &     & S 4226           &\\
    &  USNO 0958-0324966  &     & USNO 0900-12423939&\\
\hline
Comp. No.  &  USNO    & m$^*$      & USNO          & m$^*$\\
\hline
1   &  0958-0324686 & 15\fmm35& 0900-12425730& 14\fmm4\\
2   &  0958-0324901 & 15\fmm76& 0900-12436022& 14\fmm5\\
3   &               &         & 0900-12436022& 15\fmm0\\
4   &               &         & 0900-12429616& 15\fmm6\\
\hline
&&&&\\
\hline
    &  NSV 8869           &     & NSV 8970         &\\
    &  HV 10948           &     & HV 10956         &\\
    &  USNO 0975-09260589 &     & USNO 0975-09289484&\\
\hline
Comp. No.  &  USNO   & m$^*$      & USNO          & m$^*$\\
\hline
1   &  0975-09256163 & 14\fmm2& 0975-09285269& 15\fmm0\\
2   &  0975-09258315 & 14\fmm3& 0975-09286902& 15\fmm1\\
3   &  0975-09255998 & 15\fmm2& 0975-09292729& 15\fmm5\\
4   &                &        & 0975-09290674& 15\fmm9\\
\hline
&&&&\\
\hline
    &  NSV 9740          &     & NSV 9840     &     \\
    &  S 9838            &     & S 9831       &     \\
    &  USNO 0900-10650673&     & USNO 0975-09921950 &     \\
\hline
Comp. No.  &  USNO   & m$^*$   &              &     \\
\hline
1   &  0900-10654081    &  14\fmm9  & 0975-09915079 & 14\fmm5\\
2   &  0900-10655451    &  15\fmm2  & 0975-09916596 & 14\fmm6    \\
3   &  0900-10656993    &  15\fmm8  & 0975-09924115 & 15\fmm3    \\
4   &                   &           & 0975-09923676 & 16\fmm1\\
\hline

\end{tabular}
\end{center}


\centerline{\normalsize $^*$ Magnitudes refer to the B values of the USNO$-$A2.0 catalogue except 
for V947 Oph.} 
\centerline{USNO$-$B1.0 was used for this star due to the lack of appropriate objects in the other catalogue}

\end{table}





\IBVS2fig{7cm}{5847-f1.eps}{Light curve of V415 Oph}{5847-f2.eps}{Light curve of V760 Oph}
\IBVSfigKey{5847-f1.eps}{V415 Oph}{light curve}
\IBVSfigKey{5847-f2.eps}{V760 Oph}{light curve}



\IBVS2fig{7cm}{5847-f3.eps}{Light curve of V947 Oph}{5847-f4.eps}{Composite light curve of V968 Oph}
\IBVSfigKey{5847-f3.eps}{V947 Oph}{light curve}
\IBVSfigKey{5847-f4.eps}{V968 Oph}{light curve}



\IBVS2fig{7cm}{5847-f5.eps}{Light curve of NSV 8869}{5847-f6.eps}{Light curve of NSV 8970}
\IBVSfigKey{5847-f5.eps}{NSV 8869}{light curve}
\IBVSfigKey{5847-f6.eps}{NSV 8970}{light curve}

\IBVS2fig{7cm}{5847-f7.eps}{Light curve of NSV 9740}{5847-f8.eps}{Light curve of NSV 9840}
\IBVSfigKey{5847-f7.eps}{NSV 9740}{light curve}
\IBVSfigKey{5847-f8.eps}{NSV 9840}{light curve}



This research made use of the SIMBAD data base, operated by the CDS
at Strasbourg, France.

\references

Boyce, E.H., Huruhata, M., 1942, {\it Harvard Annals}, {\bf 109}, 19

Diethelm, R., 2004, {\it IBVS}, 5543

G\"{o}tz, W. et al., 1957, {\it Ver\"{o}ff. Sternw. Sonneberg}, {\bf 4}, 123, (H2)

Hoffmeister, C., 1930, {\it Sonneberg Mitt.}, {\bf 17}, 1

Hoffmeister, C., 1949, {\it Astron. Abhandl. Erg. Astron. Nachr.}, {\bf 12}, 1

Hoffmeister, C., 1967, {\it Mitt. Ver\"{a}nd. Sterne}, {\bf 4}, 39, (H3)

Kraus, A.L. et al., 2007, {\it AJ}, {\bf 134}, 1488

Meinunger, L., 1966, {\it Mitt. Ver\"{a}nd. Sterne}, {\bf 3}, 137, (H5)

The All Sky Automated Survey, {\tt http://archive.princeton.edu/\~{}asas}

Tsessevich, V.P., 1960, {\it Astron. Circ.}, {\bf 212}, 16

\endreferences

\end{document}
