COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                     NUMBER 157


                                    Konkoly Observatory
                                    Budapest
                                    26 September 1966

   FURTHER FLARE ACTIVITY IN BUTLER'S STAR IN THE SMC


The early G-type star in the direction of the Small
Magellanic Cloud, suspected by C.J. Butler to have exhibited
a rapid flare-like variation/1/,has been monitored for seven
hours at the 16-inch Nishimura reflector by J.P. Eksteen.
On the night 14-15 September 1966, further activity was
observed at 22h22m5 U.T.when a flare of 0.8 magnitude /blue/
occurred with a duration of about 3 minutes s. Figure.

                    [FIGURE 1]

This short duration is typical of flares of moderate energy
observed in the UV Ceti-type stars. However, from a
comparison with several flare stars /2/, the rates of
increase and decline and the energy involved in a star of
this luminosity clearly differentiates this event from the
classical flares in the dMe-type stars. A luminosity
classification for this star is urgently needed, as well as
a search for abnormal spectral features, especially emission
lines.
 

Boyden Observatory,
Bloemfontein
September 17, 1966
                               A. D. ANDREWS
                               C. J. BUTLER
                               J. P. EKSTEEN


[References]

  /1/ A. D. Andrews, I.B.V.S., No. 156 /1966/. [IBVS 156]
  /2/ A. D. Andrews, Irish Astron. Journ., Vol. 7, No. 1; [BIBCODE 1965IrAJ....7...20A ]
                     Armagh Obs. Contrib., No. 49 /1965/.