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\IBVShead{4137}{28 December 1994}                      % Use it with dummy or empty arguments

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\title{POSITIONS OF VARIABLE STARS IN PLAUT'S FIELD 3}
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\begintext

This paper continues the study announced in our previous
publication (Antipin {\it et al.}, 1994a) and deals with the
variable stars in the Palomar--Groningen Field 3 (Plaut, 1971). This
field contains 1474 variable stars discovered by Plaut. Using
photographic finding charts prepared by L. Plaut and available in
Moscow, we have checked for possible GSC identifications. 174 stars have
been identified with the GSC. We have also checked 83 stars discovered
in this field by other authors and identified 23 of them with GSC
objects. We are not able to present the corresponding
table here because of volume restrictions and are planning to publish
this list in Astronomical and Astrophysical Transactions. We have not
found very significant positional mistakes among those stars we were
able to identify with GSC. We have also checked positions for non-GSC
variable stars and found quite a number of serious mistakes in GCVS
positions. The corrected coordinates presented in \hfill 
\vskip 2mm
\centerline{Table 1. Corrected Coordinates for Variable Stars}
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\begin{center}
\begin{tabular}{rlcccl}
\hline
\noalign{\medskip}
Plaut & GCVS, NSV  & $\alpha(2000.0)$ & $\delta(2000.0)$ & ${\Delta}{\alpha}$ & \ \ ${\Delta}{\delta}$ \\
\hline
\noalign{\medskip}
   23 &  V2636 Sgr &  18\fh 12\fmm 23\fss 0 &  $-$31\degr 20'40''&  $-$0\fm 01\fs &  $-$1\degr 00\farcm 0 \\
   34 &  V2647 Sgr &   18 12 38.1 &  --31 08 00 &  $-0$ $03 $&$  -0$ $00.6$ \\
  111 &  V2705 Sgr &   18 13 49.7 &  --34 20 46 &  $-0$ $02 $&$  -0$ $00.8$ \\
  307 &  V2852 Sgr &   18 16 43.2 &  --34 01 22 &  $+0$ $00 $&$  -0$ $03.4$ \\
  437 &  V2965 Sgr &   18 18 27.0 &  --32 10 39 &  $-0$ $01 $&$  -0$ $11.2$ \\
  474 &  V2988 Sgr &   18 11 42.2 &  --36 11 44 &  $+0$ $10 $&$  -0$ $01.5$ \\
  521 &  V3033 Sgr &   18 12 32.2 &  --32 39 15 &  $-0$ $42 $&$  -0$ $04.0$ \\
  580 &  V3081 Sgr &   18 20 36.2 &  --34 46 21 &  $+0$ $07 $&$  +0$ $00.2$ \\
  707 &  V3180 Sgr &   18 23 02.2 &  --33 57 25 &  $+0$ $00 $&$  -0$ $00.9$ \\
  732 &  V3200 Sgr &   18 23 26.6 &  --30 54 07 &  $-0$ $02 $&$  -0$ $17.6$ \\
  755 &  V3220 Sgr &   18 23 49.5 &  --31 11 43 &  $-0$ $02 $&$  -0$ $16.1$ \\
  782 &  V3243 Sgr &   18 24 46.0 &  --32 03 01 &  $-0$ $32 $&$  +0$ $00.1$ \\
  835 &  V3288 Sgr &   18 25 15.0 &  --33 33 46 &  $+0$ $01 $&$  +0$ $11.3$ \\
  881 &  NSV10777  &   18 26 13.4 &  --31 41 59 &  $+0$ $04 $&$  +0$ $00.1$ \\
 1027 &  V3447 Sgr &   18 21 13.8 &  --30 53 46 &  $+8$ $42 $&$  -0$ $00.8$ \\
 1030 &  V3443 Sgr &   18 29 56.2 &  --30 57 37 &  $+0$ $01 $&$  -3$ $44.3$ \\
 1158 &  V3549 Sgr &   18 33 13.3 &  --31 22 27 &  $+0$ $00 $&$  -0$ $11.2$ \\
 1388 &  V3723 Sgr &   18 39 39.1 &  --34 41 16 &  $+0$ $14 $&$  -1$ $52.0$ \\
 1395 &  V3729 Sgr &   18 38 16.7 &  --36 51 46 &  $+1$ $52 $&$  +0$ $00.6$ \\
 1427 &  V3758 Sgr &   18 32 14.2 &  --31 09 34 &  $-1$ $00 $&$  +0$ $00.1$ \\
 1453 &  V3774 Sgr &   18 41 41.2 &  --32 54 35 &  $+0$ $04 $&$  -0$ $33.4$ \\
 1474 &  V666 CrA  &   18 22 22.7 &  --36 59 57 &  $-0$ $09 $&$  +0$ $00.1$ \\
      &  NSV 10351 &   18 12 20.9 &  --31 50 24 &  $+0$ $15 $&$  +0$ $01$  \\
      &  NSV 10364 &   18 12 59.4 &  --31 46 47 &  $+0$ $13 $&$  +0$ $00.2$ \\
      \noalign{\medskip}
      \hline
\end{tabular}
\end{center}      

\vfill \eject

\centerline{2}
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\centerline{Table 2. Identifications of Several GCVS Stars}
\vskip 1mm
\begin{center}
\begin{tabular}{lll}
\hline
\noalign{\medskip}
 474 &  V2988 Sgr = V655 Sgr             &    Plaut, 1971             \\
 595 &  NSV 10648 = V1289 Sgr            &    Mayall, 1951 (chart)    \\
 723 &  V1188 Sgr = NSV 10715            &    Strohmeier {\it et al.,} 1964 \\
1063 &  V3475 Sgr = V2355 Sgr            &    Rosino, 1962            \\
1105 &  V3507 Sgr = V2360 Sgr            &    Rosino, 1962            \\
1388 &  V3723 Sgr = V1635 Sgr            &    Plaut, 1971             \\
1395 &  V3729 Sgr = V2371 Sgr            &    Plaut, 1971             \\
1414 &  V3746 Sgr = V948 Sgr = V1154 Sgr &    GCVS                    \\
\noalign{\medskip}
\hline
\end{tabular}
\end{center}
\vskip 2mm
\noindent Table 1  have been
determined by one of us (S.A.) relative to GSC stars. The columns of
the table contain: Plaut's numbers (the two last lines, without
Plaut's numbers, refer to variables discovered by Rosino (1962), in
the field of the globular cluster NGC 6569); GCVS or NSV designations;
right ascensions and declinations (2000.0); positional differences found
(in the sense GCVS minus present study).

Table 2 contains 8 stars for which positional inaccuracies have led to
multiple entries in the GCVS and the NSV catalogue. The first
column gives Plaut's numbers. The second column presents the existing
GCVS or NSV designations.
The last column
of the table identifies the source of error. If the star in Table 2
does not enter also Table 1, Plaut's coordinates for this star are to be
preferred.

Several final remarks deal with difficult cases. It turns out that Plaut's
variable No.\,239 (18\fh 12\fmm 32\fs, $-$31\degr 07\farcm 3, 1950.0, Cepheid with a
period of 51: days according to Plaut, 1971) never got a GCVS designation.
The reasons for this are presently unclear, no indication of any mistakes
revealed is present in GCVS team records. Though the star could not be
identified with any GSC star, Plaut's coordinates agree with the photograph.
We have not been able to find Plaut's No.\,1282 = V3643 Sgr. The photograph
does not agree with the coordinates, a great mistake in coordinates is
probable.

Mr. J. M\'anek has turned our attention to a mistake in the second paper of
the present series (Antipin {\it et al.,} 1994b). The declination presented
there for V448 Oph = GSC\,6237.1702 is wrong, the correct $\delta$(2000.0)
value is $-$18\degr 06'56''.

Thanks are due to Mr. Jan M\'anek for his attention to our work.
\vskip 7mm

% Call for macros \authors - \authorsrightcol - \endauthors
\beginauthors
S.V. ANTIPIN
Sternberg Astronomical Institute
of Moscow University
13, Universitetskij Prosp.
Moscow 119899, Russia
\vskip 3mm
\authorsrightcol
N.N. KIREEVA
N.N. SAMUS
Institute of Astronomy
of Russian Academy of Sciences
48, Pyatnitskaya Str.
Moscow 109017, Russia
\endauthors

% Call for macro \references
\references

Antipin, S.V., Kireeva, N.N., and Samus, N.N., 1994a, {\it Inf. Bull. Var.
Stars,} No. 4020

Antipin, S.V., Kireeva, N.N., and Samus, N.N., 1994b, {\it Inf. Bull. Var.
Stars,} No. 4021

Mayall, M.W., 1951, {\it Harvard Obs. Bull.}, No. 920, 36

Plaut, L., 1971, {\it Astron. and Astrophys. Suppl. Ser.,} {\bf 4}, No. 2, 75

Rosino, L., 1962, {\it Asiago Obs. Contrib.,} No. 132, 7

Strohmeier, W., Knigge, R., and Ott, H., 1964, {\it Inf. Bull. Var. Stars,}
 No. 74


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