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\IBVShead{4342}{20 May 1996}
\title{New variable stars in the $\eta$ Herculis field}
\begintext

This paper continues the study begun in my previous publication
(Antipin, 1994). Eight new variables were discovered in the
field $10\degr\times10\degr$ centered on $\eta$ Her (Var 11--18).
This study is based on Moscow collection plates taken with the 40 cm
astrograph in Crimea.

Table 1 contains coordinates and GSC identifications
of new variables. Coordinates for GSC stars were taken from the Guide Star
Catalog; for the rest of the stars, they were measured relative to neighbouring
GSC stars. The accuracy is about $\pm1''$. Table 2 presents for each star:
number of observations, time interval (JD), type of variability,
maximum and minimum brightness (in $B$ band), $M-m$ or $D$.
Table 3 contains light elements (epoch and period) for periodic
variables. Like in my previous publication, the standard near M13
(Arp and Johnson, 1955; Forbes and Dawson, 1986) was
used to obtain the magnitudes of comparison stars (Table 4).
Finding charts and phased light curves are shown in Figures 1 and
2, respectively.
\vskip 4mm
\begin{center}
Table 1. Coordinates and Identifications of Variable Stars

\vskip 2mm
\begin{tabular}{lccc}
\hline
\noalign{\medskip}
Var & $\alpha(2000.0)$ & $\delta(2000.0)$ & GSC\\
\noalign{\medskip}
\hline
\noalign{\medskip}
Var 11&   16\fh 38\fmm 04\fss3& 34\degr 20\farcmm 32\farcss&      2585.2215\\
Var 12&   16 48 19.8&    40 28 44&                               \\
Var 13&   17 06 54.5&    39 22 11&                               \\
Var 14&   17 00 50.4&    36 08 51&                               \\
Var 15&   16 31 37.1&    34 32 23&      2584.0550                \\
Var 16&   16 22 46.3&    39 11 23&                               \\
Var 17&   16 38 27.8&    41 11 41&                               \\
Var 18&   16 44 03.8&    39 23 33&      3074.0305                \\
\noalign{\medskip}
\hline
\end{tabular}
\vskip 6mm
\centerline {Remarks on individual stars}

\medskip
Var 11. EA classification is also possible for this variable.
{\sl Min II} 15.40.

Var 15. {\sl Min II} 15.80.

\vfill \eject

\centerline{2}
\vskip 1mm
Table 2. Data on New Variable Stars

\medskip
\begin{tabular}{lcccccc}
\hline
\noalign{\medskip}
Var & $N$ & JD24...& Type & Max& Min&  $M-m$ or $D$ \\
\hline
\noalign{\medskip}
Var 11&   523&   37080--48778&   EB    &   14.70&  15.80  &       \\
Var 12&   257&   41750--48778&   RRab  &   15.10&  16.50  &  0.15 \\
Var 13&   245&   41750--48778&   RRab  &   15.50&  17.30  &  0.15 \\
Var 14&   243&   41750--48778&   RRab  &   15.90&  17.30  &  0.20 \\
Var 15&   518&   37080--48778&   EB    &   14.90&  16.30  &       \\
Var 16&   269&   37080--48778&   RRab  &   15.80&  17.10  &  0.20 \\
Var 17&   252&   41750--48778&   RRab  &   15.20&  17.30  &  0.12 \\
Var 18&   311&   37080--48778&   EA    &   12.80&  13.80  &  0.10 \\
\hline
\end{tabular}

\epsfysize=16cm
\centerline{\epsffile{4342-f1.ps}}
\centerline{Figure 1. Finding charts}
\vfill \eject

\centerline{3}
\vskip 1mm
\epsfysize=22cm
\centerline{\epsffile{4342-f2.ps}}
\centerline{Figure 2. Light curves}
\vfill \eject

\centerline{4}
\vskip 1mm
Table 3. Light Elements

\medskip
\begin{tabular}{clc}
\hline
\noalign{\medskip}
Var & Max (Min), JD& Period \\
\hline
\noalign{\medskip}
Var 11&   2441947.33&    0\fd 780649\\
Var 12&   2445589.26&     0.679340 \\
Var 13&   2441974.21&     0.675999 \\
Var 14&   2442302.31&     0.505407 \\
Var 15&   2442635.43&     0.735037 \\
Var 16&   2441926.36&     0.677168 \\
Var 17&   2441829.49&     0.497655 \\
Var 18&   2442949.45&     1.223315 \\
\hline
\end{tabular}

\medskip
\medskip
Table 4. Comparison Stars

\medskip
\begin{tabular}{lccccc}
\hline
\noalign{\medskip}
Var & a & b & c & d & e \\
\hline
\noalign{\medskip}
Var 11& 14.67&  15.08&  15.73\\
Var 12& 14.94&  15.30&  15.85&  16.29&  16.55\\
Var 13& 15.10&  15.51&  16.04&  17.34\\
Var 14& 15.46&  16.22&  16.48&  17.23&  17.82\\
Var 15& 14.85&  15.08&  15.48&  16.18\\
Var 16& 15.38&  16.00&  16.52&  17.20\\
Var 17& 14.69&  15.50&  16.27&  16.42&  17.38\\
Var 18& 12.58&  13.10&  13.69\\
\hline
\end{tabular}
\end{center}


\vskip 15mm

\beginauthors
\authorsrightcol
S.V. ANTIPIN
Sternberg Astronomical Institute
13, Universitetskij Prosp.,
Moscow 119899, Russia
\endauthors

\references

Antipin, S.V., 1994, {\it Inf. Bull. Var. Stars}, No.\,4125

Arp, H.C. and Johnson, H.L., 1955, {\it ApJ}, {\bf 122}, 171

Forbes, D. and Dawson, P.C., 1986, {\it PASP}, {\bf 98}, 102

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