COMMISSION 27 OF THE I. A. U.
       INFORMATION BULLETIN ON VARIABLE STARS
                    NUMBER 487


                                 Konkoly Observatory
                                 Budapest
                                 1970 November 8



           FLARES OF AC +8deg142 - 393.



      In the course of our programme of photoelectrical
monitoring of a number of dM, dMe and UV Ceti type stars we
observed the star AC +8deg142 - 393, Gliese 735 (1), spectral
type dM2e. Nothing about the flare activity of this star
was known.
      Our photoelectric observations were made in the
system similar to B with the 64-cm meniscus telescope of the
Crimean Astrophysical Observatory. The dates and UT of coverage
are given in Table 1. Table 2 contains the following
characteristics of flares; moment of maxima (UT); duration
of flares before and after maximum, t_b and t_a (in minutes);
amplitude of flare Delta m_B in stellar magnitudes; the limiting
amplitude of a flare Delta m_lim which could be detected; 
integrated intensities P (in minutes); and the air masses
M(z). The detailed description of the manner in which these
characteristics should be obtained given earlier (2).
The light curves of flares in relative intensities are given
on the figures. The total coverage was 30h06m.


			[FIGURE 1]
			[FIGURE 2]
			[FIGURE 3]
			[FIGURE 4]
			[FIGURE 5]

                         Table 1

Date, 1970                    Coverage U. T.
31 July          21h35m-21h39m; 21h43m-22h05m; 22h07m-22h25m;
                 22 27 -22 57 ; 23 15 -23 38 ; 23 38 -24 00 ;
1 August         00 02 -00 25 ;
3 August         21 47 -22 10 ; 22 11- 23 38 ; 23 37 -23 57 ;
                 23 59 -24 22 ;
4 August         00 25 -00 37 ; 21 12 -21 22 ; 21 23 -21 44 ;
                 21 45 -22 09 ; 22 10 -22 32 ; 22 33 -23 48 ;
8 August         21 10 -21 45 ; 21 52 -23 35 ; 23 48 -23 58 ;
7 August         21 11 -22 06 ; 22 07 -23 05 ; 23 07 -23 40 ;
8 August         21 24 -22 20 ; 22 21 -22 32 ; 22 40 -23 40 ;
9 August         19 07 -19 25 ; 19 27 -20 09 ; 20 11 -20 33 ;
                 20 34 -22 30 ; 22 35 -22 51 ; 22 52 -23 19 ;
                 23 28 -23 35 ;
10 August        20 18 -20 43 ; 20 48 -21 24 ; 21 25 -21 47 ;
                 21 53 -22 13 ; 22 15 -22 28 ; 22 29 -22 50 ;
                 22 55 -23 09 ; 23 10 -23 27 ;
11 August        18 44 -19 08 ; 19 12 -19 38 ; 19 37 -20 02 ;
                 20 04 -20 31 ; 20 32 -21 09 ; 21 11 -22 00 ;
                 22 09 -22 29 ; 23 05 -23 20 ;
13 August        19 32 -19 54 ; 19 55 -20 02 ; 20 04 -20 24 ;
                 20 25 -20 38 ; 20 57 -21 18 ; 21 19 -21 48 ;
20 August        18 18 -18 21 ; 18 22 -18 44 ; 18 45 -19 06 ;
                 19 07 -19 33 ; 19 35 -19 58 ; 20 00 -21 00 ;
                 21 01 -21 23 ;
22 August        18 25 -18 47 ; 19 59- 20 04 ; 20 08 -20 35 ;
                 20 37 -21 09 ; 21 11 -21 35 .


                           Table 2.


Date and UT                                                        
of flare                   t_b      t_a  Delta m_B Delta m_lim   P      M(z)
maximum

31 July       23h42m8      0m2      2m4    0.15      0.05     0.11     2.0
  3 Aug.      21 53.3      0.5      0.9    0.07      0.02     0.05     1.4
  9 Aug.      21 18.4      1.3      1.3    0.06      0.04     0.09     1.4
  9 Aug.      21 39.7      0.5      2.0    0.10      0.04     0.13     1.4
 11 Aug.      21 51.5      0.7      5.0    1.00      0.03     2.18     1.5


                       			N. I. SHAKHOVSKAYA
                                 Crimean Astrophysical Observatory

 
                                        K. L. MASLENNIKOV
                                    Leningrad State University





References


(1) W. Gliese, Veroffentlichungen des Astronomischen Rechen -
   Institut in Heidelberg
(2) A. D. Andrews, P. F. Chugainov, R. F. Gershberg, V. S. Oskanjan;
   IBVS No. 326, 1969.