COMMISSIONS 27 AND 42 OF THE IAU
            INFORMATION BULLETIN ON VARIABLE STARS
                         Number 3887

                                           Konkoly Observatory
                                           Budapest
                                           28 May 1993

                                           HU ISSN 0374 - 0676


                Which is the star V380 Per ?


In the Hipparcos Input Catalogue (Turon et al.  1992) the variable-star name
V380 Per is assigned to HD 25411.  But this appears to be wrong, since in
volume III of the General Catalogue of Variable Stars (Kholopov 1987) the data
(coordinates, period, spectral type, ...) of V380 Per are those of HD 25354,
and in volume IV of the GCVS (Samus 1990) the name V380 Per is explicitly given
for HD 25354 (while HD 25411 B is NSV 1442).  The error is probably not
far-reaching for Hipparcos data reduction because the variation range is small.
However since the Hipparcos Input Catalogue has largely been carried out by
using informatic processes, it is to be presumed that the error also appears in
other star lists, and the HIC itself may be used for other purposes.  Thus it
is worth while to call users' attention to the error.

HD 25354 is a spectrum-variable star.  Its Ap nature was already noted in the
HD catalogue (Cannon & Pickering 1918) and described in more detail by Babcock
(1958).  Rakos (1962) made UBV photometric measures and found the 3.90 d
period.  This value was confirmed by van Genderen (1970) and refined by Burke
et al.  (1970) and by Panov (see Schoneich et al.  1975).  These last authors
used HD 25411 as comparison star, as Rakos also did, so that one may be
wondering which star is the variable one, since they did not use any second
comparison star.  Fortunately enough, other ones were chosen by van Genderen
(HD 25307) and by Burke et al.  (HD 25543), so that it may be concluded that
the star varying with the 3.9 d period is really HD 25354.

The variable-star name V380 Per has been assigned by the Variable Star
Commission in the 57th name-list of variable stars (Kukarkin et al.  1970) on
the basis of the results obtained by Rakos (1962).  Besides the reference to
Rakos' paper, the identifications are given:  BD, HD and GC numbers.  Just
after this, the authors wrote a note saying that the data given for the star in
a paper by Abt and Golson (1962) are in reality for HD 25411.  In that paper,
the authors gave the mean values of V, B - V and U - B, with the dispersion
values, for most of the Ap stars in Babcock's catalogue (1958) of magnetic
stars.  But unfortunately they measured HD 25411 instead of HD 25354, as one of
them has explained in an erratum (Abt 1964).  This accounts for the note by
Kukarkin et al.  The above-mentioned error has probably its origins in that
note.  Indeed somebody may have believed that the data in the papers quoted in
the note were concerning the variability rather than mean values of the
magnitude and the colour.

Since the identifications clearly concern HD 25354 in the 57th name-list in
which the variable-star number V380 Per has been first assigned, as well as in
the General Catalogue of Variable Stars, we may conclude that V380 Per is
surely HD 25354.  It is also similarly identified in the Catalogue des périodes
observées pour des étoiles Ap (Catalano & Renson 1984), as well as in the
Catalogue général des étoiles Ap et Am (Renson 1991).


                          P. RENSON
                          Institut d'Astrophysique
                          Université de Liége
                          Avenue de Cointe, 5
                          B-4000 Liége (Belgium)

References

Abt H.A., 1964, Ap.J. 140, 1641 [BIBCODE 1964ApJ...140.1641A ]
Abt H.A., Golson J.C., 1962, Ap.J. 136, 35 [BIBCODE 1962ApJ...136...35A ]
Babcock H.W., 1958, Ap.J.Suppl. 3, 141 [BIBCODE 1958ApJS....3..141B ]
Burke E.W., Rolland W.W., Boy W.R., 1970, J.R.Astr.Soc.Canada 64, 353 [BIBCODE 1970JRASC..64..353B ]
Cannon A.J., Pickering E.C., 1918, Ann.Hvd.Obs. 91 [BIBCODE 1918AnHar..91....1C ]
Catalano F.A., Renson P., 1984, Astron.Astrophys.Suppl. 55, 371 [BIBCODE 1984A&AS...55..371C ]
Kholopov P.N., 1987, General Catalogue of Variable Stars vol.III, Moscow "Nauka" [BIBCODE 1987gcvs.book.....K ]
Kukarkin B.V., Kholopov P.N., Perova N.B., 1970, Inform.Bull. Var.Stars 480
Rakos K.D., 1962, Lowell Obs.Bull. 5, 227 [BIBCODE 1962LowOB...5..227R ]
Renson P., 1991, Catalogue General des Etoiles Ap et Am, Inst.d'Astroph.,
   Univ.Liege
Samus N.N., 1990, General Catalogue of Variable Stars vol.IV, Moscow "Nauka" [BIBCODE 1990gcvs.book.....S ]
Schoneich W., Hildebrandt G., Furtig W., 1976, Astron.Nachr. 297, 39 [BIBCODE 1976AN....297...39S ]
Turon C. et al., 1992, The Hipparcos Input Catalogue, INCA Consortium, ESA [BIBCODE 1992hicv.book.....T ]
van Genderen A.M., 1970, Astron.Astrophys.Suppl. 1, 123 [BIBCODE 1970A&AS....1..123V ]