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\IBVShead{4451}{4 March 1997}
\title{IDENTIFICATION OF DAHLMARK VARIABLES: IV}
\begintext

     This note is a continuation of a series (Skiff \& Williams 1997a, 1997b;
Williams \& Skiff, 1997) listing accurate coordinates
and identifications for variable stars discovered by the amateur observer
Lennart Dahlmark.  This work is intended to assist in the recovery of
these variable stars for further study and linkage within other surveys.

     The methods used by the authors in their independent identification of
the variable stars are described in the first note of this series
(Skiff \& Williams, 1997a).  Table 1 gives precise positions and
identifications for the fourth list of variables published by Dahlmark (1994,
1996). The table lists the `LD' name followed by the J2000 position
and its source, coded in the table and notes as follows: U = UA~1.0;
G = GSC~1.1; D = measurement from DSS using UA~1.0 comparison stars.  The
next two columns give IRAS point-source and GSC designations.  An asterisk
in the next column indicates a note at the bottom of the table.  The final
column contains GCVS designations and other names from SIMBAD.

\begin{center}
{Table 1. Dahlmark Variables LD 186 -- LD 220\phantom{(}} \\
\begin{tabular}{lccccccl}
\hline
\\[-4mm]
Name & \multicolumn{2}{c}{RA\quad (2000)\quad Dec}& s & IRAS & GSC & n & Other ids. \\
\\[-4mm]
\hline
\\[-3mm]
LD 186     & 21 53 29.32 & +44 05 05.0 & G &            & 3197-00543 &   & V1093 Cyg    \\
LD 187     & 21 57 32.02 & +38 24 25.0 & U &            &            &   &              \\
LD 188     & 21 58 53.70 & +50 12 01.2 & U & 21570+4957 &            &   &              \\
LD 189     & 22 06 32.94 & +48 07 28.1 & U &            &            &   &              \\
LD 190     & 22 07 54.22 & +41 05 11.4 & U & 22057+4050 &            &   &              \\
LD 191     & 22 09 05.10 & +45 30 28.7 & G & 22070+4515 & 3606-00442 &   &              \\
LD 192     & 22 09 30.89 & +52 11 30.1 & G &            & 3618-02113 &   &              \\
LD 193     & 22 09 34.88 & +52 12 30.4 & D &            & 3618-00137 & * &              \\
LD 194     & 22 10 15.66 & +38 15 45.7 & U & 22081+3801 &            &   & FBS L 1-19   \\
LD 195     & 22 13 50.01 & +43 54 38.2 & G &            & 3211-01072 &   &              \\
LD 196     & 22 14 46.86 & +46 54 39.2 & U &            &            &   &              \\
LD 197     & 22 15 58.94 & +42 22 46.4 & U & 22138+4207 &            &   &              \\
LD 198     & 22 19 38.18 & +48 13 20.3 & U & 22175+4757 &            &   &              \\
LD 199     & 22 23 28.93 & +47 44 32.2 & U &            &            &   & NSV 14144    \\
LD 200     & 22 24 49.89 & +47 49 24.1 & U &            &            &   &              \\
LD 201     & 22 25 41.15 & +50 18 16.1 & D & 22236+5002 &            & * &              \\
LD 202     & 22 26 22.70 & +48 24 05.2 & U &            &            &   &              \\
LD 203     & 22 28 13.09 & +44 27 51.9 & G &            & 3212-00933 &   &              \\
LD 204     & 22 29 56.56 & +45 46 54.8 & U &            &            &   &              \\
LD 205     & 22 31 34.45 & +48 16 00.7 & G & 22294+4800 & 3624-01959 &   &              \\
LD 206     & 22 41 10.49 & +40 34 10.4 & U &            &            &   &              \\
LD 207     & 22 43 21.04 & +41 17 20.1 & G & 22410+4101 & 3222-00149 & * &              \\
LD 208     & 22 45 15.09 & +50 51 53.9 & U & 22431+5036 &            &   & HL Lac       \\
\hline
\end{tabular}
\end{center}
\vfill \eject

\centerline{2}
\vskip 1mm
\begin{center}
{Table 1 (cont.)} \\
\begin{tabular}{lccccccl}
\hline
\\[-4mm]
Name & \multicolumn{2}{c}{RA\quad (2000)\quad Dec}& s & IRAS & GSC & n & Other ids. \\
\\[-4mm]
\hline
\\[-3mm]
LD 209     & 22 46 20.97 & +52 14 34.6 & G &            & 3633-02601 & * &              \\
LD 210     & 22 49 35.45 & +52 18 11.0 & G & 22474+5202 & 3633-02259 &   &              \\
LD 211     & 22 50 15.93 & +53 24 17.0 & U & 22481+5308 &            &   &              \\
LD 212     & 22 59 06.46 & +49 07 58.2 & D &            &            &   &              \\
LD 213     & 23 01 06.42 & +37 50 45.3 & G &            & 3216-01210 &   &              \\
LD 214     & 23 02 02.40 & +39 59 50.8 & G & 22597+3943 & 3220-02872 &   &              \\
LD 215     & 23 02 24.03 & +41 43 36.9 & G &            & 3224-01028 & * &              \\
LD 216     & 23 06 24.50 & +38 15 34.4 & D & 23040+3759 & 3216-02107 & * &              \\
LD 217     & 23 16 25.96 & +38 43 47.1 & U & 23140+3827 &            &   &              \\
LD 218     & 23 25 41.71 & +45 42 03.9 & U & 23233+4525 &            &   &              \\
LD 219     & 23 31 01.32 & +50 03 17.6 & U & 23286+4946 &            &   &              \\
LD 220     & 23 34 07.64 & +46 20 02.9 & U & 23317+4603 &            & * & NSV 14621    \\
\\[-3mm]
\hline
\end{tabular}
\end{center}
\vskip 2mm
\normalsize
Notes:

LD 193\quad\enskip NE component of very close pair blended in GSC.
    SE component has\\
\hspace*{20mm} end-figures 35{\fss}16/28{\farcs}3~(D).

LD 201\quad\enskip NE component of pair.  SW component has end-figures
    40{\fss}73/12{\farcs}0~(D).

LD 207\quad\enskip Spectral type M7 (Dolidze 1975)

LD 209\quad\enskip Not FK Lac, see Williams (1996).

LD 215\quad\enskip Faint on POSS-I red print (R $\sim$ 16--17), bright in GSC.

LD 216\quad\enskip SW component of pair blended in GSC.  NE component has
   end-figures\\
\hspace*{20mm} 24{\fss}87/37{\farcs}7~(D).

LD 220\quad\enskip SV* R 101.
\vskip 3mm
\large
     The authors thank the following for their indispensable assistance in
completing this work: SIMBAD, maintained by the Centre de Donn\'{e}es
Astronomique, Strasbourg, France; and SkyView, maintained by Keith Scollick
at Goddard Space Flight Center.

\vskip .8cm
\beginauthors
Gareth V. WILLIAMS
Harvard-Smithsonian Center 
for Astrophysics
60 Garden Street
Cambridge MA 02138-1516
U.S.A
e-mail: {\tt gwilliams@cfa.harvard.edu}
\authorsrightcol
Brian A. SKIFF
Lowell Observatory
1400 West Mars Hill Road
Flagstaff AZ 86001-4499
U.S.A.
e-mail: {\tt bas@lowell.edu}
\vskip 7mm
\endauthors
\vskip -6mm

\references

Dahlmark, L.,  1994, {\it J. AAVSO}, {\bf 21}, 34

Dahlmark, L.,  1996, {\it IBVS}, No.\,4329

Dolidze, M.V.,  1975, {\it Byull. Abastuman. Astrofiz. Obs.},
     {\bf 47}, 171.

Skiff, B.A., and Williams, G.V.,  1997a, {\it IBVS}, No.\,4448

Skiff, B.A., and Williams, G.V.,  1997b, {\it IBVS}, No.\,4450

Williams, G.V.,  1996, {\it IBVS}, No.\,4354

Williams, G.V., and Skiff, B.A.,  1997, {\it IBVS}, No.\,4449


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