COMMISSION 27 OF THE I. A. U.
         INFORMATION BULLETIN ON VARIABLE STARS
                     Number 1779

                                      Konkoly Observatory
                                      Budapest
                                      1980 May 7


                THREE NEW FLARE STARS


In the summer 1979 a series of objective prism plates was obtained with the
four degree objective prism of the Byurakan 40" Schmidt telescope. Selected
dark cloud complexes were observed in order to study H_alpha-emission objects.
To obtain unwidened spectra Kodak 103aE and IIIaF emulsions were used in
conjunction with an RG-1 filter isolating the spectral interval lambda lambda
6100-6900 A. The dispersion at H_alpha with the 4deg objective-prism is about
1100 A/mm.

The by-product of our study has been the discovery of three new flare stars.
Figures 1, 2 and 3 give the identification charts. The arrows point to the
brightest stars in the fields, which have the following designations:
A=BD+54d2452, B=BD+48d3309, C=BD+48d3306, D=BD 57d2317, E=BD+57d2316.

                        [FIGURE 1]
                       [Figs. 1-3.]

In Table I some informations are summarized about these flare stars - the
approximate coordinates (1950.0), data of flare ups and the remarks on their
spectra in maximum light. In all three cases the appearance of a strong
H_alpha-emission line was registered accompanied with a weak red continuum
enhancement. This phenomenon was observed only once for each of the three
stars. On the other plates these three stars do not show any sign of activity
(e.g. H_alpha-emission). The colour of these stars estimated on the basis of
POSS blue and red prints, as well as the rapid appearance and disappearance of
strong H_alpha-emission suggest that these stars are flare stars.

Table I

No.   RA.           D.         m_pg       Remarks                Date
      1950.0                   min.       Delta m_pg

1.    20h 56.4m    55d 14.7'   18.2m     the continuum is        22.08.1979
                                         enhanced, Delta m
                                         ~1.5m strong H_alpha
                                         emission
2.    21 11.1      48  44.2    17.1      the continuum is        26.07.1979
                                         weakly enhanced
                                         Delta m~1.0m
                                         strong H_alpha
                                         emission
3.    21 20.7      57 36.4     18.5      strong H_alpha          31.07.1979
                                         emission without
                                         enhancement of
                                         continuum


I. JANKOVICS
Konkoly Observatory

N.D. MELIKJAN
Byurakan Observatory

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