COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                    Number 2193

                                 Konkoly Observatory
                                 Budapest
                                 1982 August 27

                                 HU ISSN 0374-0676





    PHOTOELECTRIC OBSERVATIONS OF BY Dra IN 1980 AND 1982




    Photoelectric monitoring of the red dwarf star (flare star)
BY Dra has been carried out at the mountain station of the
Konkoly Observatory of the Hungarian Academy of Sciences in 1980
and 1982, using the 20 inch Cassegrain telescope. The observations
were made by a single channel photoelectric photometer in the
Johnson B and UBV colours in 1980 and 1982, respectively. In
1980 the registration of the observations was made by a chart-
recorder, while in 1982 by a computer managed photometer with
5 or 10 sec integration time.
    The monitoring intervals in UT, the mean scatter of the
observations and the total monitoring time for each night are
given in the Table. Any interruption of more than one minute
has been noted.
    During the observations no flare event was recorded.


                    Table

Date   Monitoring intervals     Scatter   Total
       (U.T.)                             monitoring
1980 June 12/13                       time
       21h26m30s - 21h54m00s    0.016     1h 3.5m
       21 59 00  - 22 25 00
       22 31 00  - 22 41 00
1980 August 6/7
       21h49m30s - 22h16m00s    0.013     1h 26m
       22 26 30  - 22 46 00




                  Table (cont.)

Date  Monitoring intervals Scatter    Total
            (U.T.)                    monitoring
                                      time
1980 August 6/7
      23h28m30s - 23h53m30s
       0 01 00  -  0 23 00
       0 27 30  -  0 47 00
1982 May 26/27
      21h18m00s - 21h35m00s   0.005(V)  2h37m
      21 49 00  - 22 10 00    0.006(B)
      22 16 00  - 22 34 00    0.012(U)
      22 40 30  - 22 57 00
      23 06 00  - 23 25 00
      23 32 00  - 23 50 30
      23 58 00  -  0 17 00
       0 24 00  -  0 43 30
       0 49 00  -  0 58 00
1982 June 28/29
      23h52m30s -  0h11m00s    0.006(V)    45.5m
       0 16 00  -  0 35 00     0.006(B)
       0 40 00  -  0 48 00     0.022(U)


                               Total: 5h52m





                          M.A. SOLIMAN
                        Helwan Observatory
                           Helwan, Egypt