COMMISSION 27 OF THE I. A. U.
            INFORMATION BULLETIN ON VARIABLE STARS
                        Number 2814

                                                   Konkoly Observatory
                                                   Budapest
                                                   28 October 1985

                                                   HU ISSN 0374 - 0676


          REPEATED FLARE-UPS ON FLARE STARS IN NGC 7000 REGION


  In the program of systematic search for flare stars in different stellar
aggregates, series of ultraviolet multiple exposure plates have been obtained
with the 40" Schmidt telescope of Byurakan Observatory. The centre of observed
field is : 20h52m; Dec = +43deg00' (1950). The observations were made on Orwo
ZU-2 emulsion through a Schott UG-1 filter.
  In the course of a re-examination of the photographic plates taken between
1979 and 1980 (IBVS No. 2339) four flare-ups were discovered on already
known flare stars. The data for registered flare repetitions are presented in
Table I. The Tonantzintla or Byurakan designation is also given.

                               Table I

Design.   RA(1950)   Dec(1950)        m(u)   Delta m(u)      Date
                                           
T2        20h57.3m    42deg26'        15.6m    1.6m      16.10.1979
B12       20h56.2m    43deg41'        18.0     2.0       19.10.1979
B16       20h40.1m    40deg03'        19.0     2.8       17.10.1979
B43       20h51.7m    41deg33'        20.5     6.4       24.10.1979


  New series of observations were carried out in this Cygnus region in 1981
and 1984 with an effective coverage of 40 hours. During the examination of this
photographic material, however, we did not discover any flare-ups.




   H. S. CHAVUSHIAN        I. JANKOVICS
   Byurakan Observatory    Konkoly Observatory
   Byurakan, U.S.S.R.      Budapest, Hungary