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\begin{document}

\IBVShead{4856}{2 March 2000}

\IBVStitle{Identification of Variable Stars in Indus}

\IBVSauth{L\'opez, Carlos E.; L\'epez, H\'ector S.}

\IBVSinsto{F\'elix Aguilar Observatory, Benav\'{\i}dez 8175 (oeste)
5407 Marquesado, San Juan, Argentina,\\ \indent e-mail: lopez2283@infovia.com.ar}

\begintext

Continuing the program conducted to improve the coordinates of variable
and suspected variable stars in the southern hemisphere (L\'opez and
Girard 1990, L\'opez and L\'epez 2000), accurate positions for
confirmed variables in the Indus region are herein presented.

Considering the finding charts recommended by the GCVS (Kholopov et
al.\ 1985) we identified the confirmed variables in this area in the
USNO A2.0 catalogue (Monet et al.\ 1998) which was read and displayed
using a program developed by Manek (1999).

The results are presented in two tables. Table 1 lists those variables
included in catalogues such as HIPPARCOS (HIP), TYCHO (TYC) (ESA, 1997)
or PPM (R\"{o}ser and Bastian, 1991). For these stars we only list the
identification number in the respective catalogues. We also added, in
the AC column, the AC2000 (Urban et al.\ 1998) catalogue number.

Table 2 lists the positions of the variables we were able to
successfully identify in the USNO A2.0. The first column gives the
variable star name while the positions, as extracted from the USNO
A2.0, are listed in the second and third columns. The Guide Star
Catalogue (Lasker et al.\ 1990) number is listed in the GSC column. In
the fifth column we included an alternative designation; in general it
is the preliminary name used in the finding chart recommended by the
GCVS. Those variables which were also identified in the AC2000
catalogue are marked with an asterisk (*) and the AC2000 number is
given in the Notes to Table 2.

The improvement of the  coordinates is not complete since two of the
confirmed variables in this constellation (listed in the GCVS) were not
identified. They are RX Ind and AV Ind, for which, as noted in the
GCVS, no finding charts are available.

We would like to express our gratitude to Dr.\ Jan Manek for making his
program available to display both the USNO A1.0 and USNO A2.0
catalogues.  Our thanks also go to Dr.\ Dave Monet for providing a copy
of the USNO A1.0 as well as the USNO A2.0 and to Dr.\ Nikolai Samus for
many helpful comments and suggestions.

\newpage

\begin{center}
{\normalsize Table 1: Variables in HIP, TYC, PPM, and AC2000 catalogues}
\vskip 2mm
\begin{tabular}{lclcc}
\hline
GCVS & HIP & TYC & PPM & AC\\
\hline
R Ind & & 9124  121\\
S Ind & & 8792 1227 & 348975 & 4376676\\
T Ind & 105334 & 8422  584 & 327089 & 3965816\\
U Ind & & 8419  978 & 774536\\
V Ind & 104613 & 8422  875 & 326956\\
W Ind & & 8793  636 & 774672 & 4378516\\
X Ind & & 8806 1426 & 774725\\
Y Ind & & 8807  304\\
Z Ind & & 8440 1153 & 765235\\
RR Ind & 107490 & 9122   78 & & 4593294\\
RS Ind & & 9327  425 & 375067\\
RT Ind & & 8795 1088 & 774562\\
RU Ind & & 8812 1074\\
RY Ind & & 8408  686 & 326706\\
RZ Ind & & 8429  945\\
SS Ind & & 9123  503 & & 4594813\\
ST Ind & & 8410 1555 & & 3956729\\
SU Ind & 103215 & 8408 1462 & 326648 & 3960978\\
TV Ind & & 8794  621 & 348662\\
AK Ind & 104424 & 8421   29 & 326921\\
AQ Ind & & 8821  746 & & 4384869\\
AX Ind & & 8800  817 & 774608\\
AY Ind & 107705 & 9331  189 & 375135\\
BB Ind & & 8407 1031 & 764937\\
BC Ind & 107525 & 9323  259 & 365372\\
\hline
\end{tabular}
\end{center}

\newpage

\begin{center}
{\normalsize Table 2: Positions and Identifications of Variables in Indus}
\vskip 2mm
\begin{tabular}{lccclc}
\hline
GCVS & \multicolumn{2}{c}{RA\quad (2000)\quad Dec}& GSC & Other
ID & Note\\
\hline
RV Ind& 23 00 59.568 & $-$70 56 19.36 &           & CD$-$71\deg1769\\
RW Ind& 21 58 29.238 & $-$69 12 36.27 & 9323.0715 & 380.1931 & *\\
SV Ind& 20 30 15.882 & $-$55 04 51.39 & 8794.1150 & S 6893\\
SW Ind& 20 30 26.171 & $-$48 14 58.19 & 8410.1623 & S 7692 & *\\
SX Ind& 20 30 43.031 & $-$46 02 19.20 & 8406.1135 & S 6747\\
SY Ind& 20 32 54.138 & $-$59 07 09.50 & 8802.0968 & S 6896\\
SZ Ind& 20 32 29.647 & $-$55 25 37.10 & 8794.1460 & S 6898\\
TT Ind& 20 33 36.684 & $-$56 31 52.33 &           & S 6899\\
TU Ind& 20 33 10.557 & $-$45 26 00.89 &           & S 6749\\
TW Ind& 20 33 42.833 & $-$46 12 36.41 & 8406.1091 & S 6751\\
TX Ind& 20 34 47.089 & $-$58 43 24.40 &           & S 6900\\
TY Ind& 20 36 14.739 & $-$59 02 39.80 & 8802.1130 & S 6902\\
TZ Ind& 20 36 12.133 & $-$53 28 02.98 &           & S 6903\\
UU Ind& 20 38 53.967 & $-$58 03 57.95 & 8798.0132 & S 6904\\
UV Ind& 20 39  8.937 & $-$54 25 15.82 & 8794.0022 & S 6905\\
UW Ind& 20 39 06.742 & $-$53 17 54.93 & 8790.0708 & S 6906\\
UX Ind& 20 39 40.927 & $-$54 27 32.64 & 8794.0879 & S 6908\\
UY Ind& 20 40 16.560 & $-$54 07 31.34 & 8791.1196 & S 6910\\
UZ Ind& 20 40 43.855 & $-$58 21 54.50 & 8803.0423 & S 6909\\
VV Ind& 20 40 29.803 & $-$53 16 53.75 & 8791.1130 & S 6911\\
VW Ind& 20 41 00.817 & $-$46 32 35.97 & 8407.0741 & S 6759\\
VX Ind& 20 41 51.421 & $-$47 06 43.19 & 8411.1161 & S 6764 & *\\
VY Ind& 20 42 06.335 & $-$47 04 39.52 & 8411.0452 & S 6766\\
VZ Ind& 20 42 27.743 & $-$46 07 22.91 &           & S 6767\\
WW Ind& 20 44 49.083 & $-$55 41 25.49 &           & S 6912\\
WX Ind& 20 44 32.167 & $-$46 16 30.31 & 8407.0442 & S 6770\\
WY Ind& 20 44 30.853 & $-$45 41 37.15 &           & S 6771\\
WZ Ind& 20 46 19.339 & $-$53 48 09.67 & 8791.1448 & S 6915\\
XX Ind& 20 48 35.261 & $-$58 38 15.55 &           & S 6916\\
XY Ind& 20 49 26.999 & $-$59 04 29.81 &           & S 6918\\
XZ Ind& 20 48 35.923 & $-$46 24 53.64 & 8407.0775 & S 6777\\
YY Ind& 20 49 29.745 & $-$45 35 34.05 & 8408.0123 & S 6778\\
YZ Ind& 20 51 01.064 & $-$58 26 43.05 &           & S 6919\\
ZZ Ind& 20 50 27.219 & $-$45 33 07.26 &           & S 6780\\
AA Ind& 20 50 33.330 & $-$46 46 46.33 & 8408.0494 & S 6781\\
AB Ind& 20 51 17.183 & $-$46 07 46.74 &           & S 6784\\
AC Ind& 20 53 20.691 & $-$58 51 57.77 &           & S 6920\\
AD Ind& 20 53 09.631 & $-$54 49 19.71 &           & S 6921\\
AE Ind& 20 53 24.441 & $-$56 01 27.59 & 8796.1142 & S 6922 & *\\
AF Ind& 20 56 36.000 & $-$59 10 03.44 & 8804.0529 & S 6925\\
AG Ind& 20 59 38.278 & $-$59 22 35.46 & 8804.0858 & S 6927\\
\hline
\end{tabular}
\end{center}

\newpage

\begin{center}
{\normalsize Table 2: cont'd.}
\begin{tabular}{lccclc}
\hline
GCVS & \multicolumn{2}{c}{RA\quad (2000)\quad Dec}& GSC & Other
ID & Note\\
\hline
AH Ind& 20 59 49.626 & $-$59 16 07.18 & 8804.0874 & S 6928\\
AI Ind& 21 05 10.615 & $-$46 32 53.05 &           & S 6801\\
AL Ind& 21 09 57.084 & $-$47 28 52.97 & 8425.1256 & S 6806\\
AM Ind& 21 14 21.695 & $-$45 27 53.39 & 8422.0392 & S 6815\\
AN Ind& 21 21 19.636 & $-$46 44 06.56 & 8422.1067 & S 6819\\
AO Ind& 22 00 29.060 & $-$50 29 39.67 & 8444.1487 & S 7702 & *\\
AP Ind& 22 05 44.694 & $-$55 59 59.97 & 8813.0342 & CP$-$56\deg9807\\
AR Ind& 20 31 19.267 & $-$55 23 00.06 & 8794.0844 & S 6894\\
AS Ind& 20 32 28.472 & $-$55 27 59.85 & 8794.0842 & S 6897\\
AT Ind& 20 39 30.261 & $-$54 36 36.29 &           & S 6907\\
AU Ind& 20 46 16.106 & $-$58 36 39.33 &           & S 6914\\
AW Ind& 20 53 55.251 & $-$57 29 16.70 & 8800.0196 & S 6923\\
AZ Ind& 22 33 30.767 & $-$69 33 44.09 & 9337.1994 & S 7705\\
\hline
\end{tabular}
\normalsize
\begin{tabular}{llll}
\multicolumn{4}{l}{Notes to Table 2:} \\
RW Ind& AC 4594157 & SW Ind& AC 3955468\\
VX Ind& AC 3958315 & AE Ind& AC 4376355\\
AO Ind& AC 3973094\\
\end{tabular}
\end{center}

\references

ESA, 1997, The HIPPARCOS and TYCHO Catalogues, ESA SP-1200

Kholopov, P.N., Samus, N.N., Frolov, M.S. {\it et al.}, 1985,
{\it General Catalogue of Variable Stars}\ (4th ed.; Moscow: Nauka Publishing House)

Lasker, B., Sturch, C., McLean, B.J. {\it et al.}, 1990, {\it
Astron.\ J.}, {\bf 99}, 2019

L\'opez, C.E., and Girard, T.M., 1990, {\it Publ.\ Astron.\ Soc.\
Pac.}, {\bf 102}, 1018

L\'opez, C.E., and L\'epez, H.S., 2000, {\it IBVS}, No.\,4824

Manek, J., 1999, private communication

Monet, D., Bird, A., Canzian, B., {\it et al.}, 1998, USNO A2.0;
U.S. Naval Observatory, Washington DC

R\"{o}ser, S., and Bastian, U., 1991, {\it PPM Star Catalogue}
(Heidelberg: Astronomisches Rechen Institut)

Urban, S.E., Corbin, T.E., Wycoff, J.C. {\it et al.}, 1998, {\it
Astron.\ J.}, {\bf 115}, 1212
\end{document}

