COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                   Number 2132

                                Konkoly Observatory
                                Budapest 
                                1982 April 28
                                HU ISSN 0374-0676




               FLARE STARS IN ORION



 Continuous photographic observations of the flare stars in the Orion
nebula (M 42) region have been carried out at the Bulgarian National
Astronomical Observatory during the year 1981.
 The photographic patrol has been made with the 50/70 cm Schmidt-telescope
at Rojen in U-light (ORWO ZU-21 plates with UG 2 filter).
 For 22h50m total effective time of observations 25 plates with 137 
successive exposures each of 10 minutes were obtained. The data about the 
discovered flares are summarized in Table I.



                              Table I.
---------------------------------------------------------------------------------------
Rojen   Parenago   R.A.(1900.0)  D(1900.0)     M_Umin  Deltam_U  Date(UT)  Identifica-
Nos.    Nos.                                                                    tion
---------------------------------------------------------------------------------------
R9                 5h28.0m          -5d17'      18.5m   2.5m    03.02.1981
R10     1463         29.5           -4 59       18.0    3.3     02,02.1981 31(1)
R11                  30.9           -6 21       20.2    8.3     02.02.1981
R12                  31.3           -5 04       21      6.9     31.01.1981
R13                  37,7           -6 49       19.2    3.4     03.02,1981



The Rojen numeration (2) for the Orion flare stars has been continued. 


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

References:
Haro G., Chavira E., 1969, Bol.Obs. Tonantzintla y Tacubaya, v. 5, No. 32, (1)  
      59-66 p. [BIBCODE 1969BOTT....5...59H ]
Tsvetkov M.K. et al., IBVS No. 1889, 1980.