COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                     NUMBER 156


                               Konkoly Observatory
                               Budapest
                               23 September 1966


       POSSIBLE FLARE ACTIVITY IN A G-TYPE STAR

During 60-inch photoelectric observations in the Small
Magellanic Cloud, C.J. Butler has found a 10th magnitude
star used by H.C. Arp as a secondary standard+/ which
increased suddenly by 0.1 magnitude in blue, showing the 
characteristic gradual decline of the stellar flares in dMe
stars. The star, designated by Arp as R in his Plate 1
/approximate position, 0h59.0m,-72d54', 1960/ was 
substantially brighter  than normal in blue for more than
half an hour after the main event. Maximum occurred at
1h10m U.T.on 10th September 1966. On an ADH objective
prism plate the star appears as an early G-type star. Arp
gives the colours, B-V = 0.74, C_U = 1,73, and a visual
magnitude 10.58. Monitoring of the star is planned to
confirm the unusual rapid variation of so early a spectral
type.

Boyden Observatory
September 11, 1966
                            A. D. ANDREWS


+ H.C. Arp, Astronomical Journal, Vol. 63 /1958/, 118 [BIBCODE 1958AJ.....63..118A ]