COMMISSION 27 OF THE I. A. U.
           INFORMATION BULLETIN ON VARIABLE STARS
                         Number 968

                                      Konkoly Observatory
                                      Budapest
                                      1975 March 3


         FLARE OBSERVATIONS OF V1216 SAGITTARII

During the period 14th July - 22nd July 1974 observations were made
at Boyden Observatory of the flare star V1216 Sagittarii with the
41 cm Nishimura Reflector. The detecting element was a cooled EMI
6256A photomultiplier tube fitted with a standard Johnson B filter.
The table gives details of the observations over a total monitoring
time of 20h03m. Seven flares were observed during this time, all of
them being of moderate intensity. One flare was particularly large,
but unfortunately the recording equipment went off scale and it was
only possible to estimate the intensity as greater than 6.00.
Considering the time intervals between the following flares

              1 and 5 95h10m00s(-2x48h)
              2  "  3 50 25 30 (-1x48h)
              5  "  7 94 23 30 (-2x48h)

we possibly have more evidence for the forty-eight hour interval
previously reported for this star (Andrews, A.D. 1966 and A.H. Jarrett
and J.P. Eksteen, 1959).

Date      Universal       Total   Flare    U.T    Duration   (I_0+f^(-I_0))/
          Time            Hours    No.      of     minutes        /I_0  
July                      Per              Max.
1974                      Night

  14   23h04m-23h36m      6h40m     1    23h07m.5    32            3.00
x 15                                2    19 49.0     18           >6.00
  17   22 02 -22 27.5     4 35      3    22 14.5     25.5          1.70
  18   19 28.3-19 46      4 36      4    19 36.5     17.6          1.77
  18   22 08.5-22 36      4 36      5    22 17.5     27.5          1.97
  21   21 01  -21 17      2 45      6    21 10.6     16.0          1.81
  22   20 33  -20 48.8    1 27      7    20 41.0     15.8          1.93

x Recording gear went off scale; values are estimated.

                                         A.H. JARRETT and G. GRABNER
                                         Boyden Observatory,
                                         Department of Astronomy,
                                         University of the O.F.S.
                                         Bloemfontein.
                                         Republic of South Africa.
References:
Andrews, A.D. 1966 P.A.S.P. 78, 542 [BIBCODE 1966PASP...78..542A ]
A.H. Jarrett and J.P. Eksteen, 1969, MNASSA, 28, 131 [BIBCODE 1969MNSSA..28..131J ]


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