COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                    Number 1888

                                   Konkoly Observatory
                                   Budapest
                                   1980 December 16

                                   HU ISSN 0374-0676


            FLARE STARS IN THE PLEIADES

In 1980 we have continued the patrol observations in the
Pleiades region in order to discover flare stars. The observations 
were made with the 20"/28"-Schmidt telescope of the Bulgarian 
National Astronomical Observatory in Rojen.
        Table I gives the data for observational material during the
30h45m total effective time of observations.

                    Table   I
Telescope  Light    Time of         Number of         Number of       T_eff
                    exposure           plates         exposures         
                  
20"/28"      U       10 min             30               169          28h10m
                      5 min              5                31           2 35
The data of observed flares are summarized in Table II.

                    Table     II
Rojen N   H II    RA      D       m_{Umin} Delta m_U       Date   Identification
                                                                     Byurakan N
R 6             3h40m2  +24d22'     21m:      6.7m        5.11.1980
R 7               41.2   22 02      17.3      0.8        12.10.1980  B 18
                                              2.3        15.10.1980
R 8      1827     42.4   23 40      17.9      5.0        18.10.1980  B 51
R 9      2411     43.7   24 01      16.9      2.4        15.10.1980  B 55
                                              2.0        17.10.1980
R10               45.3   25 04      20:       5.7         9.10.1980
R11               45.9   23 00      20:       6.5         8.10.1980

The successive columns give the following data:
1.Rojen designation
2.Hertzsprung number
3-4.Coordinates for 1900.0
5-6.Photographic magnitude at minimum and amplitude of the observed flare in U-light
7.Date of the flare event (UT)
8.Identification of the flare stars by the Byurakan lists.


            M. K. TSVETKOV, ASSYA G. TSVETKOVA, S. A. TSVETKOV
        Department of Astronomy with National Astronomical
        Observatory, Bulgarian Academy of Sciences,
        Sofia-1000, 7th November Street 1, Bulgaria