COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                    Number 2019

                                  Konkoly Observatory
                                  Budapest
                                  1981 September 24

                                  HU ISSN 0374-0676




           FLARE STARS IN THE PLEIADES REGION




  A re-examination of all the multiple exposure photographic
material obtained during the years 1976 through 1980 at Konkoly
Observatory on the Pleiades region has been carried out. All
these observations were made with the 60 cm Schmidt telescope of
Konkoly Observatory on Kodak 103aO emulsion using Schott UG-2
filter.
  Four new flare stars have been discovered and nine already
known flare stars showed flare repetitions. For some reason all
these flares escaped detection on this observational material
(IBVS No. 1455,1456,1626,1696,1780).
  Some data of the discovered new flare stars are presented.
in Table I: the first column gives the number of flare, column
two the Hertzsprung number, columns three and four give the
approximate coordinates for 1900.0, column five the approximate
minimum brightness in U-band, column six the observed amplitude
of the flare-ups in U-band and column seven the date of the flare-
ups.

                     Table I

N    HII    RA          P      Mu(min)  DeltaU   Date
          (1900.0)
-------------------------------------------------------
1   1516   3h41.7m   23d59.6'   16.7m    1.2m  11.12.77
2          3 37.0    23 08.2    16.6     1.6   03.03.78
3                                        1.2   08.11.78
4          3 41.5    24 34.0  > 20.0   > 3.2   27.10.79


                          Table II
 N     HII       RA        D(neppP)  m_u(min)  DeltaU   Date
                    (1900.0)
--------------------------------------------------------------- 
 19.   1531   3h41.7m      23d40.0'   15.7m     1.2m   04.11.78
 55.   2411   3 43.7       24 01.0    16.9      0.9    29.12.75
 55.                                            1.2    24.11.78
 70.    212   3 38.0       24 06.6    17.2      1.2    03.11.78
 82.          3 41.5       24 13.3    18.4      2.5    04.11.78
103.          3 36.9       23 08.0    17.7      2.1    12.12.77
103.                                            0.8    12.12.77
103.                                            1.5    04.03.78
105.          3 41.7       23 23.2    18.2      1.7    27.10.79
107.   2208   3 43.3       24 16.0    18.1      1.7    02.01.76
109.   2927   3 45.1       24 25.0    16.5      2.0    07.11.77
334.   1280   3 41.1       23 51.0    17.4      1.6    29.08.79
---------------------------------------------------------------




 The flare data for the already known flare stars are given
in Table II. The Byurakan designation was used and the
Hertzsprung numbers are also given.





N.D. MELIKIAN                       I. JANKOVICS
Byurakan Astrophysical Observatory  J. KELEMEN
Byurakan, Armenian SSR              Konkoly Observatory
378433 USSR                         1525 Budapest P.O.B. 67
                                    Hungary