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\IBVShead{4662}{19 January 1999}

\IBVStitletl{On Identifications of New Variable Stars}{ Announced by Woitas}

\IBVSauth{E.V. Kazarovets}
\IBVSinsto{Institute of Astronomy, Russian Academy of Sciences,
48, Pyatnitskaya Str., Moscow 109017, Russia\\ email: elena\_k@sai.msu.su}

\IBVSabs{Confusion in the positions of variable stars announced in}
\IBVSabs{IBVS No. 4444 has been clarified.}
\IBVSkey{variable stars, positions}

\begintext

Having prepared the special (Hipparcos) 74th Name-list of variable
stars (Kazarovets et al., 1999), we are now working on the next,
75th Name-list. Among candidates selected for designation as variable
stars, there are several stars from the list of 43 new variables
published by Woitas (1997). Our work on checking and improving
coordinates of Name-list candidates and on their identification with the
GSC shows that the appearance of catalogues like GSC, USNO A1.0 and A2.0,
Hipparcos and Tycho greatly reduces the number of problems
encountered when locating variables and measuring their coordinates.
However, this applies to recent discoveries of variable stars. Old
GCVS and NSV variables need a long and laborious work: they must be found
using charts and identified using new positional catalogues, thus improving
coordinates and switching to the equinox 2000.0 from 1950.0. In this
connection, papers published by variable star researchers should not
create new identification problems instead of reducing their number.
Unfortunately, the cited paper (Woitas, 1997) does create new problems.

Our analysis of Table 1 in Woitas (1997) has shown the following.

1. Of the 43 announced new variables, two stars are known GCVS objects
(No.\,26 = V713 Ara, No.\,29 = V764 Sco).
Additional 27 stars have been attributed GCVS names in the Hipparcos
catalogue (ESA, 1997), but surely Woitas did not yet know the final
version of the Hipparcos catalogue during the preparation of his paper.

2. The heterogeneity of presentation of 2000.0 coordinates in the Table
is amazing, especially for a study based upon Tycho mission, mainly
an astrometric one. The coordinates published by Woitas, in many
cases, considerably (up to several arcseconds) differ from 2000.0
coordinates in the Hipparcos catalogue as well as in the PPM catalogue
or in the GSC. Probably the positional data used by Woitas come from
SIMBAD. Below I present a table of accurate positions.

3. A number of mistakes in the information presented by Woitas
and of other problems deserve special discussion.

No.\,1 = TICID 3303/979. This Tycho (and GSC) number corresponds to
HD 15922, not 15992. The star HD 15992 is NSV 00839 (Kholopov, 1982),
and the present misidentification (due to misprint) could bring the
star into the GCVS. The needed star, HD 15922, is the variable star
V376 And, named on the base of Hipparcos data. But most amazing is
that the right ascension given by Woitas for this star actually corresponds
to the equinox 1950.0, whereas the declination is for 2000.0, as
indicated in the header.

No.\,4 = TICID 8535/222. Misprint in the number of the region; read
8538 instead of 8535.

No.\,10 = TICID 8911/2750. The declination in IBVS No.\,4444 is greatly in
error.
Instead of $-$61\deg12\arcm15\farcs8, it should be $-$61\deg52\arcm17\farcs5.

No.\,40 = TICID 2772/1716. For this red star (spectrum M5), the large
difference between the blue and the red magnitude resulted in the
existence of two GSC numbers; besides that coinciding with the Tycho
designation, there is also GSC 2772/1486.

No.\,43 = TICID 8953/3540. The coordinates given by Woitas correspond to
the position of CoD$-$59\deg3546, reduced from rather rough 1875.0
coordinates; but CoD$-$59\deg3546 is probably GSC 8958/3649. The Tycho
mission did not observe GSC 8958/3649, and GSC (or TICID) 8953/3540
corresponds to CoD$-$59\deg3541 = CPD$-$59\deg3034, at a position
differing from that published by Woitas by several minutes of arc.

I wish to thank Dr.\ N. Samus for his help. Thanks are due to the Russian
Foundation for Basic Research and to the
State Programme ``Astronomy'' for partial financial support of the
GCVS research.

\references

ESA, 1997, The Hipparcos and Tycho Catalogues, ESA SP-1200

Kazarovets, E.V. et al., 1999, IBVS, No.\,4659

Kholopov, P.N. (ed.), 1982, New Catalogue of Suspected Variable Stars,
Moscow: Nauka

Woitas, J., 1997, IBVS, No.\,4444

\endreferences

\newpage

\begin{table}
\caption{Tycho Positions for Variables Announced by Woitas}
\begin{center}
\begin{tabular}{rr@{\hr}c@{\mm}c@{\fsec}lr@{\deg}c@{\arcm}c@{\farcs}lr@{ }l}
\hline
No. & \multicolumn{4}{c}{$\alpha(2000.0)$} &
\multicolumn{4}{c}{$\delta(2000.0)$} & \multicolumn{2}{c}{GCVS}\\
\hline
 1 & 02 & 35 & 11 & 630 &   +49 & 51 & 37 & 25 & V376 & And\\
 2 & 03 & 35 & 53 & 004 & $-$69 & 11 & 34 & 76 & CS & Hyi\\
 3 & 06 & 18 & 02 & 797 &   +35 & 35 & 51 & 43 & \multicolumn{2}{c}{(new)}\\
 4 & 06 & 18 & 22 & 271 & $-$54 & 24 & 14 & 61 & \multicolumn{2}{c}{(new)}\\
 5 & 06 & 34 & 32 & 794 &   +55 & 21 & 10 & 93 & BQ & Lyn\\
 6 & 06 & 35 & 37 & 648 &   +32 & 34 & 36 & 52 & V459 & Aur\\
 7 & 07 & 46 & 52 & 852 &   +81 & 40 & 56 & 75 & FF & Cam\\
 8 & 07 & 32 & 46 & 150 & $-$53 & 33 & 18 & 87 & V454 & Car\\
 9 & 07 & 39 & 27 & 232 & $-$11 & 33 & 50 & 33 & V381 & Pup\\
10 & 07 & 54 & 29 & 379 & $-$61 & 52 & 17 & 47 & \multicolumn{2}{c}{(new)}\\
11 & 09 & 47 & 20 & 403 &   +32 & 46 & 56 & 24 & EL & Leo\\
12 & 09 & 47 & 10 & 378 & $-$57 & 20 & 43 & 45 & \multicolumn{2}{c}{(new)}\\
13 & 10 & 24 & 39 & 640 & $-$54 & 19 & 18 & 94 & V346 & Vel\\
14 & 10 & 44 & 10 & 024 & $-$72 & 03 & 52 & 13 & V521 & Car\\
15 & 11 & 01 & 35 & 756 & $-$61 & 02 & 55 & 83 & \multicolumn{2}{c}{(new)}\\
16 & 11 & 18 & 43 & 743 & $-$58 & 11 & 11 & 10 & V537 & Car\\
17 & 11 & 21 & 38 & 963 & $-$60 & 59 & 28 & 22 & \multicolumn{2}{c}{(new)}\\
18 & 11 & 37 & 34 & 060 & $-$60 & 54 & 11 & 66 & V913 & Cen\\
19 & 12 & 17 & 29 & 634 & $-$34 & 30 & 18 & 30 & V337 & Hya\\
20 & 12 & 38 & 51 & 509 &   +13 & 48 & 13 & 50 & KM & Com\\
21 & 13 & 09 & 36 & 086 & $-$07 & 46 & 51 & 27 & KY & Vir\\
22 & 14 & 19 & 37 & 740 &   +05 & 53 & 46 & 67 & NN & Vir\\
23 & 14 & 22 & 52 & 236 & $-$55 & 57 & 44 & 36 & V1003 & Cen\\
24 & 14 & 22 & 17 & 716 &   +41 & 27 & 02 & 18 & DU & Boo\\
25 & 16 & 05 & 01 & 109 & $-$39 & 13 & 00 & 28 & LN & Lup\\
26 & 17 & 00 & 36 & 618 & $-$61 & 24 & 17 & 79 & V713 & Ara\\
27 & 17 & 32 & 10 & 485 & $-$51 & 04 & 26 & 75 & V863 & Ara\\
28 & 17 & 46 & 22 & 666 & $-$72 & 49 & 19 & 41 & \multicolumn{2}{c}{(new)}\\
29 & 17 & 56 & 08 & 498 & $-$45 & 09 & 20 & 67 & V764 & Sco\\
30 & 18 & 34 & 26 & 303 &   +57 & 48 & 06 & 56 & HL & Dra\\
31 & 20 & 15 & 53 & 568 &   +07 & 40 & 13 & 27 & \multicolumn{2}{c}{(new)}\\
32 & 20 & 46 & 40 & 197 & $-$27 & 13 & 59 & 86 & \multicolumn{2}{c}{(new)}\\
33 & 21 & 01 & 53 & 351 &   +18 & 59 & 55 & 94 & \multicolumn{2}{c}{(new)}\\
34 & 21 & 32 & 00 & 737 & $-$58 & 48 & 54 & 43 & BT & Ind\\
35 & 21 & 54 & 22 & 194 & $-$41 & 15 & 57 & 81 & CO & Gru\\
36 & 22 & 14 & 02 & 615 & $-$57 & 13 & 06 & 33 & DH & Tuc\\
37 & 22 & 25 & 46 & 170 & $-$49 & 49 & 33 & 24 & CT & Gru\\
38 & 22 & 28 & 58 & 321 &   +50 & 57 & 47 & 28 & V411 & Lac\\
39 & 23 & 49 & 58 & 211 & $-$61 & 08 & 07 & 24 & DU & Tuc\\
40 & 23 & 56 & 58 & 052 &   +32 & 20 & 14 & 06 & \multicolumn{2}{c}{(new)}\\
41 & 18 & 03 & 19 & 263 &   +23 & 49 & 00 & 54 & \multicolumn{2}{c}{(new)}\\
42 & 05 & 40 & 58 & 773 & $-$27 & 57 & 07 & 72 & \multicolumn{2}{c}{(new)}\\
43 & 11 & 05 & 44 & 373 & $-$60 & 29 & 15 & 81 & \multicolumn{2}{c}{(new)}\\
\hline
\end{tabular}
\end{center}
\end{table}

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