COMMISSION 27 OF THE I. A. U.
         INFORMATION BULLETIN ON VARIABLE STARS
                      NUMBER 336

                                 Konkoly Observatory
                                 Budapest
                                 1969 March 14

               THE FLARE STAR AD LEO

During the February 1969  international observing
session on AD Leo, the star was patrolled for 28 hours by a
team of observers in the United Kingdom. All observations
were visual. A summary of the hours of coverage and the
times of two suspected flares of small amplitude is given
below.

1969              U.T.                      Observers
Feb.8      2115-2233                     L
   11      1851-1908,1933-2050           L
   12      2037-58,2108-2214,2255-2316   A, H, J,P
   14      2000-2400                     A, G, H, P, Pi
   15      0000-53,1848-2400             A, G, H, L, P, Pi
   16      0000-35,1940-2400             A, G, H, L,P
   17      0000-35,2125-2400             A, G, H, L,P
   18      0000-50                       G
   20      2130-50,2305-2400             G
   21      0000-0105                     G
   22      2045-2300                     M



Total Coverage 28h20m (Observers: A.D. Andrews, J.S. Glasby,
B. Hardy, W. Johnston, R.J. Livesey, P. Moore, J. Perrott,
H.S. Piper)

                   Suspected Flares
1969     U.T.   Deltam_ vis   Duration   Observer            Remarks
                               (mins)     
Feb.14   2000       ~0.5        ~8           G           Flare in decline at
                                                         start of observations.
    16   2016        0.5         8          A,P

    A comparison  photoelectric magnitude sequence was
kindly supplied by L.H.Solomon prior to publication. We
gratefully acknowledge the cooperation of members of the
British Astronomical Association, in particular, Mr. J.S.
Glasby, Director of the Variable Star Section.

Armagh Observatory          A.D. ANDREWS
March 6, 1969                J. PERROTT