COMMISSION 27 OF THE I. A. U.
            INFORMATION BULLETIN ON VARIABLE STARS
                        Number 2730

                                         Konkoly Observatory
                                         Budapest
                                         24 May 1985

                                         HU ISSN 0374 - 0676



                  FLARE STARS IN THE PLEIADES



  According to the programme of regular search for flare stars in the
Pleiades region at the National Astronomical Observatory Rozhen of the
Bulgarian Academy of Sciences, patrol photographic plates have been taken
with the 20"/28" Schmidt telescope in U-light (ZU21 with a UG2 filter) and
in pg-light (ZU21 without filter) during the period September 1983 - October
1984.

  Table I gives some details about the observational material obtained.

                  Table I
Telescope Light   Time of    Number      Number of   teff.
                  exposure   of plates   exposures
                    5 min.     24          140         11h40m
           U       
                   10 min.     18          101         16h50m
20"/28"
           pg       5 min.     12           72          6h

  A new flare star and 6 flare events of known flare stars have been 
discovered. Table II summarizes our results. The successive columns give the
following data:
1. Rozhen designation of the Pleiades flare stars according to Tsvetkov et
  al. (IBVS, No. 2338, 1983) have been continued;
2. Hertzsprung number;
3.-4. Coordinates for 1900.0;
5.-6. Photographic magnitude at minimum and amplitude of the observed flare
  events in U-light;
7. Date of the flare event (U.T.);
8. Identification of the flare stars by the Catalog and Identification Charts
  of the Pleiades Flare Stars (Haro et al., Bol. Inst. Tonantzintla, 3, No.
  1, 1982).

  The identification charts of those new flare stars (R18, R20, R21, R22,
R24 - Tsvetkov et al., IBVS, No. 2224, 1982; IBVS, No. 2338, 1983, and the
present paper) which are not included in the Tonantzintla Catalog (Haro et al.,




                             Table II

Rozhen No. HII     R.A.1900  D.1900       Umin DeltamU   Date     Identification

R24                 3h39.4m   22deg22'    20.2     5.3  30.09.1984
R25      1061       3 40.6    23 48       16.6     2.7   7.09.1984     TC224
R26      1355       3 41.4    23 43       17.3     2.2   7.09.1984     TC262
R9       2411       3 43.7    24 01       16.9     0.7   6.10.1983     TC377
R9       2411       3 43.7    24 01       16.9     2.4  30.09.1984     TC377
R9       2411       3 43.7    24 01       16.9     0.6   1.10.1984     TC377
R27      2602       3 44.3    23 41       18.7     3.2   7.09.1984     TC391

1982) are shown in Figure 1. The scale of the charts corresponds to the scale
of the identification charts of Haro et al. (1982). North is at the top,
east is to the left.


                            [FIGURE 1]




                KATYA P. TSVETKOVA, ASSYA G. TSVETKOVA
                         and M.K. TSVETKOV
                   Department of Astronomy with
                  National Astronomical Observatory,
                    Bulgarian Academy of Sciences,
                     Sofia-1784, Lenin Str. 72
                           Bulgaria