COMMISSION 27 OF THE I. A. U.
         INFORMATION BULLETIN ON VARIABLE STARS
                      Number 1031

                                   Konkoly Observatory
                                   Budapest
                                   1975 August 12


       TWO POSSIBLE NEAR-BY FLARE STARS IN CANCER


    During our regular search for flare stars in the field of the
 Praesepe cluster (approximately 20 sq. degrees), we have found two
 dMe stars that undoubtedly form a physical system and certainly do
 not belong to the Praesepe cluster but are relatively near-by flare
 stars.
    The stars referred to appear in the "Lowell Proper Motion Survey 
 (Northern Hemisphere), the G Numbered Stars" (1971). The separation 
 between the stars is of the order of 12 seconds of arc. In the
 Table we give the corresponding Tonantzintla serial number for the
 flare stars found in the Praesepe region, the G Lowell number, the right
 ascension and declination, the visual magnitudes, the spectral types,
 and the number of flare-ups detected in each star during 298 hours of
 effective observation in the near ultraviolet; in the last column of
 this table, we are giving the Delta mU corresponding to the minimum and
 maximum amplitudes of the outbursts observed.
    The spectral types were derived from red and near infrared
 objective prism plates taken with our Tonantzintla Schmidt camera. 
 Because of the overlapping of the two spectral images, the Halpha emission
 line in the fainter component of the pair is doubtful.
    It will be of importance to determine more accurate spectral
 types, magnitudes and colors and the distance of this physical pair
 of flare stars. In the near future, we will publish the photographic
 reproductions of some of the different flare-ups in these stars 
 together with the list of new flare stars found at the Tonantzintla 
 Observatory in the Praesepe cluster region during the last years.


-------------------------------------------------------------------------- 
Flare Star   Star    RA 1950  Dec.       v    Spectral  No.of^*    Delta mU
Number     G number                     mag.    type    flare-ups
                                                        detected
--------------------------------------------------------------------------
 T12       G 009-008 8h28m46s +19d34.0' 12.2    M5e        6       0.9-3.0
 T13       G 040-026 8 28 46  +19 34.0  13.4    M5e?       6       0.5-4.0
--------------------------------------------------------------------------


* Although six different flare-ups have been detected in each star, in
             no case the outburst in the two stars coincide in time.
             

Instituto Nacional de Astrofisica,
Optica y Electronica.
Tonantzintla, Mexico.    

                                              G. HARO 
                                              E. CHAVIRA
                                              G. GONZALEZ