COMMISSION 27 OF THE I. A. U.
            INFORMATION BULLETIN ON VARIABLE STARS
                         NUMBER 835

	                                Konkoly Observatory
        	                        Budapest
                	                1973 October 20


     PHOTOELECTRIC OBSERVATIONS OF V 1216 Sgr DURING THE 1973
            JUNE 23 - JULY 7 INTERNATIONAL PATROL



    According to the observation schedule proposed by the I.A.U.
 Working Group on Flare Stars (Chugainov IBVS 744, 1972) V 1216 Sgr
 has been observed at the Catania Astrophysical Observatory using
 a 61 cm universal type reflector feeding a synchronous U,B,V photometer. 
 D.C. amplifiers and strip chart recorders with a time-constant 
 of 1 sec. f.s. were used. Some preliminary results of the
 observations are here presented.
    Table 1 gives the detailed coverage in U.T. Patrol interruptions 
 longer than one minute are noted. During 29.1 hours of effective 
 coverage one flare was observed.

      Table 1. Detailed Coverage (Tel. 61cm, Light u,b,v)
Date
1973			Coverage (U.T.)			Total     _____________
						       coverage     3sigma/I_0
June     22h05m-2213,2234-2303,2305-2310,2319-2400,                  u   b   v
23-24    0000-0036,0040-0125,0138-0203;       		189         .50/.07/.08
24-25    2134-2151,2153-2280,2227-2322,2331-2348,
         2350-2400,0000-0024,0030-0058,0126-0205;  	197         .50/.07/.09
25-26    2230-2249,2251-2400,0000-0004,0026-0044,
         0047-0206;                           		189         .50/.07/.04
26-27    2323-2338,0006-0100,0102-0205;       		132         .60/.05/.05
27-28    2249-2302,2306-2324,2328-2339,2342-2400,
         0000-0004,0026-0125,0139-0204;       		148         .50/.08/.05
28-29    2303-2320,2345-2400,0000-0053,0055-0206;  	156         .70/.10/.05
July
01-02    2028-2132,2134-2150,2221-2325,2332-2352,
         2358-2400,0000-0038,0104-0210;       		270         .60/.09/.04
02-03    2048-2300,2324-2400,0000-0033;       		 81         .70/.10/.05
05-06    2212-2350,2354-2400,0000-0010;       		114         .70/.10/.06
06       2118-2213;                           		 55         .80/.12/.06
07-08    2145-2157,2200-2328,2337-2356,0023-0205;  	216         .60/.09/.05

Some characteristics of this flare are given in Table 2. The three
colour light curves, as relative intensities in the instrumental
photometric system versus U.T. are shown in the accompanying figure.
The error bars indicate the maximum noise fluctuations of the recordings.



	        Table 2. Characteristics of the Flare

Light	tmax(UT)     J.D.	d_b  d_a    3sigma/I_0r (I_f/I/0)max   Energy	       Air
        1973 July 2  2441...			                        p    erg       mass
u       01 12.1      865.5559	0.2   5.5     0.45   	3.25 	      5.13   	      2.158
b       01 12.2        		0.2   5.4     0.09      1.16 	      1.23
v       01 12.3        		0.3   5.2     0.04      0.21 	      0.28
U                                                 	3.01 	      4.77  5.95x1030
B                                                 	1.00 	      1.10  4.68x1030
V                                                 	0.14 	      0.19  2.14x1030

	The explanation of the symbols and further details both on the
observing equipment and on the reduction procedure can be found
in Cristaldi and Rodono Astr.Astrophys.Suppl. 10, 47, 1973.
        C.L. Presti, F.Spinella and V. Stancanelli have cooperated in
this work.


Catania Astrophysical Observatory
95125 Catania, Italy


                                S. CRISTALDI
                                M. RODONO


                     [FIGURE 1]