COMMISSION 27 OF THE I.A.U.
               INFORMATION BULLETIN ON VARIABLE STARS
                            Number 1455

                                                      Konkoly Observatory
                                                      Budapest
                                                      1978 August 3


      FLARE STAR OBSERVATIONS IN THE PLEIADES REGION

We have continued the survey for flare stars in the region
at the Pleiades cluster in 1977.
   The observations have been carried out with the 60/90/180 cm
Schmidt telescope of the Konkoly Observatory. The method of 
observations was the common one of multiple and equal exposures of
10 minutes in U-band.
   The effective coverage of these observations was 26.7 hours.
Four new flare stars have been discovered and eight of the already
known flare stars showed flare repetitions.
   Table I gives some data of the discovered new flare stars:
the first column gives the serial number; column two and three
the approximate coordinates for 1900.0, column four the approximate 
minimum brightness in U-band; column five the observed 
amplitude of the flare-up in U-band; column six the date of the
flare-up.


                   Table I

Designation    RA          D      m_u   Deltam_u     Date

1*            3h33.4m    23d11'  16.8m   2.5m     05.11.1977
2               36.5     22 16   18.6    2.1      12.12.1977
3               39.1     24 08   17.6    2.0      07.11.1977
4               44.1     22 10   18.9    3.5      11.12.1977

* The flare star No. 1 in the Table I is probably identical with
  the star No. 308 of the Byurakan list.

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


                          Table II

Designation

No.   H II     RA         D       mu    Deltam_u     Date

3             3h36.7m   23d41'   18.6m    2.5m     07.11.1977
55    2411      43.7    24 01    16.8     1.8      08.11.1977
68     134      37.7    23 55    16.8     0.7      07.11.1977
107   2208      43.3    24 15    17.0     1.5      11.12.1977
109   2927      45.1    24 26    16.2     2.8      08.10.1977
157   2144      43.1    23 26    17.6     2.1      07.11.1977
233             46.2    25 50    18.5     3.7      07.11.1977
334   1280      41.1    23 51    16.8     1.5      07.11.1977
                                          4.5      07.11.1977


     I. JANKOVICS               G.B. OGANJAN

     Konkoly Observatory        Byurakan Observatory
     of the Hungarian
     Academy of Sciences