COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                     NUMBER 760

                                   Konkoly Observatory
                                   Budapest
                                   1973 January 23


PHOTOELECTRIC OBSERVATIONS OF THE FLARE STAR UV CETI DURING
     THE 1972 OCTOBER 1-15 INTERNATIONAL PATROL.




    The preliminary results of UV Cet photoelectric observations 
carried out at the Catania Astrophysical Observatory
during the period proposed by the IAU Working Group on flare
stars (P.F. Chugainov, 1971, IBVS No. 605) are given. The 
observations were made in b light with a 91 cm cassegrain 
reflector feeding a classical one channel photometer.
    The patrol intervals in U.T. are given in Table 1. During
the 8.0 hours of patrol time 8 flares were observed, their
characteristics are given in Table 2.
    The light curves of the observed flares in the B color
are shown in Figures 1, 2 and 3.
    The explanation of symbols and details both on observing
equipment and on the Catania photometric system can be found
in Cristaldi S. and Rodono M., Astron. and Astrophys. Suppl.
10, 1973.
  R. Barbagallo, M. Consoli, C. Lo Presti have collaborated
to the present work.




Catania Astrophysical Observatory
December 29, 1972



                           S. CRISTALDI and M. RODONO



                      Table 1
-----------------------------------------------------------------------------
Date     Tel. Light          Coverage U.T.              Total   3sigma/I_0
1972                                                   coverage
-----------------------------------------------------------------------------
Oct.4    91     b   0018-0029; 0051-0101; 0102-0111;
         -          0122-0155; 0159-0210; 0219-0230;
                    0249-0258; 0308-0324.                120m     0.05
Oct.7    91     b   0039-0204.                           085      0.07
Oct.9-10 91     b   2058-2105; 2107-2116; 2117-2140;
                    2148-2229; 2231-2256; 2300-2321;
                    2322-2333; 2338-2347; 2350-2400;
                    0000-0027; 0030-0130; 0133-0147;
                    0154-0205; 0212-0222.                278      0.05
----------------------------------------------------------------------------




                            Table 2
---------------------------------------------------------------------------------------------
no.     t_max U.T.                      3sigma/I_0r                              Air   f sky
                   JD                                             Energy         mass
        October   2441...  d_b    d_a           (I_f/I_0)_max   P       erg   
---------------------------------------------------------------------------------------------
1/72   4.002350  594.5215  0.15m  2.30m   0.12      0.39       0.19   8.54x10^28  1.49 1  2
2/72   4.020815  594.5941  0.10   1.80    0.12      1.43       1.24  54.28x10^28  1.96 5  2
3/72   7.005065  597.5403  0.45   2.00    0.16      0.38       0.22   9.46x10^28  1.58 0  1
4/72b  7.005500  597.5433  0.14   4.00    0.16      1.51       1.57  68.87x10^28  1.60 3  1
5/72   7.012070  597.5612  0.30   2.60    0.16      3.71       1.32  57.65x10^28  1.71 0  2
6/72   7.012340  597.5631  0.10   5.00    0.16      1.36       1.05  45.97x10^28  1.73 0  2
7/72b  9.213420  600.4039  0.25   4.50    0.14      0.69       0.44  19.35x10^28  1.72 3  2 
8/72a 10.010995  600.5537  0.15   7.25    0.14      2.62       1.04  45.48x10^28  1.72 3  2
---------------------------------------------------------------------------------------------
    Telescope: 91 cm, blue filter.


                        [FIGURE 1]