COMMISSION 27 OF THE I. A. U.
         INFORMATION BULLETIN ON VARIABLE STARS
                     Number 1780

                                  Konkoly Observatory
                                  Budapest
                                  1980 May 7


      FLARE STAR OBSERVATIONS IN THE PLEIADES - REGION IN 1979


Three new flare stars and two new outbursts of already known Pleiades - region
flare stars were discovered during 29h40m effective observational time on the
plates obtained with the 60/90/180 cm Schmidt-telescope at Konkoly Observatory.

The observations were made on Kodak 103aO emulsion using Schott UG 2 filter.
The multiple exposure plates - in most cases - contain a series of 6-exposures
of 10 minutes each. The whole number of exposures: 178.

Table I.

No.   R.A.         D         m_u     Delta m_u    Date
1     3h 41.6m    24d 33'   20.5m     7.1m       26.10.1979
2     3  42.6     23  46    20.5      6.0        03.09.1979
3*    3  45.0     23  48    18.5      2.0        04.11.1978

* Star No. 3 was found on the observing material published in the paper:
Jankovics, Kelemen 1979, I.B.V.S. No. 1696.

In Table I the first column gives the serial number for the new flare star
found, columns two and three the approximate coordinates for 1900.0, in the
fourth column we give the approximative U-band magnitude at minimum light,
column five presents the observed amplitude of the flare in U-band, and column
six the date of the flare up.

The data for the observed flare-ups of the known flare stars are presented in
Table II.

Table II

No.    HII   R.A.        D.       m_u   Delta m_u     Date
70     212   3h 38.0m   24d 07'  17.2m   4.4m         27.10.1979
418          3  37.0    24  00   20.4    4.7          27.10.1979

We have used the Byurakan designation and the Hertzsprung number is also given.


I. JANKOVICS
J. KELEMEN
Konkoly Observatory
Budapest, Hungary

M.K. TSVETKOV
Department of Astronomy
Bulgarian Academy of Sciences