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\IBVShead{4354}{15 July 1996}

\title{IDENTIFICATION OF DAHLMARK VARIABLES}

\begintext

In his latest list of new variable stars, Dahlmark (1996) suggested a
number of identifications with known variable stars.  In addition to
Dahlmark's proposed identifications (LD186 = V677~Cygni or V1093~Cygni,
LD209 = FK~Lacertae and LD220 = NSV~14621), the current author suspected
that LD199 = NSV~14144 and that LD208 = HL~Lacertae.

To confirm these possible identifications, comparisons were
made between Dahlmark's finding charts and the original finding charts for
the known variables: V677~Cygni, Hoffmeister (1957a);
V1093~Cygni, Hoffmeister (1964); FK Lacertae,
Hoffmeister (1957b); HL~Lacertae, Hoffmeister (1967); and
NSV~14144, Hoffmeister (1965).  There was no finding chart
given for NSV~14621 by Ross (1926).

The finder-chart comparisons show that the identification of LD209 with
FK~Lacertae is incorrect, but that the other four LD objects can be
identified with known variable stars, noting that LD186 = V1093~Cygni.

Accurate coordinates and identifications from the Guide Star Catalogue
(GSC) are given in Table 1.  Discrepancies with GCVS positions are noted.
Positions without GSC identifications were measured on
the Digital Sky Survey.  The number of comparison stars used in the
reduction is given in the table; the (internal) r.m.s. residual of the
comparison stars was 0\farcs 2 for all the reductions.  Although no
confirming chart is available the newly-determined
position for LD220 is in excellent agreement with the GCVS position for
NSV 14621.

\vskip 1cm

\beginauthors
\authorsrightcol
Gareth V.\ WILLIAMS
Harvard-Smithsonian Center for
\qquad Astrophysics
60 Garden Street
Cambridge MA 02138
U.S.A.
E-mail: gwilliams@cfa.harvard.edu
\endauthors
\vskip -1cm
\begin{references}

Dahlmark, L., 1996, {\it I.B.V.S.}, No.\,4329.

Hoffmeister, C., 1957a, {\it M.V.S.}, No.\,274.

Hoffmeister, C., 1957b, {\it M.V.S.}, No.\,280.

Hoffmeister, C., 1964, {\it Astron.\ Nachr.}\ {\bf 288}, 49.

Hoffmeister, C., 1965, {\it Astron.\ Nachr.}\ {\bf 289}, 1.

Hoffmeister, C., 1967, {\it Astron.\ Nachr.}\ {\bf 290}, 43.

Kholopov, P.\ N., {\it et al.}, 1985--1988, {\it General Catalogue of
Variable Stars}, 4th edition (Moscow, Nauka Publishing House)

Ross, F.\ E., 1926, {\it Astron. J.}\ {\bf 36}, 123.

\end{references}

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Table 1. Accurate coordinates and GSC identifications
\begin{tabular}{cccccc}
\\
\hline
Object&R.A. (2000)&Decl. (2000)&GSC id&LD id&Note\\
\hline
\\
V677 Cyg&21\fh 53\fmm 17\fss 69&+44\degr 03\farcmm 23\farcs 0&3197.00163&&\\
V1093 Cyg&21 53 29.32&+44 05 05.0&3197.00543&LD186&1\\
\\
LD209&22 46 20.97&+52 14 34.6&3633.02601&&\\
FK Lac&22 46 33.45&+52 09 29.2&3633.02237&&2\\
\\
HL Lac&22 45 15.10&+50 51 53.9&&LD208&3\\
\\
NSV 14144&22 23 28.94&+47 44 32.3&&LD199&4\\
\\
LD220&23 34 07.65&+46 20 02.7&&&5\\
\hline
\end{tabular}
\end{center}

Note:

1. GCVS R.A.\ in error by +12\fs .

2. GCVS R.A.\ in error by $-$9\fs .

3. 9 GSC comparison stars.
   GCVS R.A.\ in error by +16\fs .

4. 13 GSC comparison stars.
   GCVS R.A.\ in error by +5\fs , Decl.\ by $-$3\farcmm .

5. 12 GSC comparison stars.  J2000.0 GCVS position
   (R.A.\ 23\fh 34\fmm 08\fs, Decl.\ $+$46\degr 20\farcm 4).

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