COMMISSION 27 OF THE I. A. U.
         INFORMATION BULLETIN ON VARIABLE STARS
                     Number 1683

                                      Konkoly Observatory
                                      Budapest
                                      1979 October 9




PHOTOELECTRIC OBSERVATIONS OF THE NOVALIKE OBJECT IN VULPECULA



     Photoelectric observations of the novalike object in
Vulpecula were obtained on several nights during the period April
to June 1979, on the 104-cm reflector of the Uttar Pradesh State
Observatory, using UBV filters of Johnson and Morgan system and
EMI 6094S photomultiplier cooled to -20dC. Standard d.c. technique
for recording the observations was employed.
     BD +21d4165 and BD +21d4167 were used as comparison stars.
However, the final reductions of the observations have been
carried out with respect to BD +21d4165. Standard stars were also
observed to obtain the transformation equations and UBV magnitudes
of the comparison star. The standard deviations of the comparison
star are +-0.005m, +-0.011m and +-0.011m in V, (B-V) and (U-B) magnitudes, 
respectively. The magnitudes and colours of the novalike object 
and the comparison star are given in Table I. The light and
colour curves of the object are plotted in Fig. 1.
                            

                           Table I
Magnitude and colours of the novalike object in Vulpecula and the
                 comparison star  BD+21d4165

Date,  U.T.1979         V    B-V         U-B    No. of obs.

April 
18.951               8.888m 0.387m      0.262m      4
19.920               8.868   .383        .233       6
20.910               8.862   .374        .223       8
26.985               8.772   .360         -         2
30.961               8.788     -          -         2
May 
1.929                8.807   .392        .269       7
3.931                8.852   .392        .247       6
4.928                8.857   .382        .264       6
5.928                8.840   .393        .264       8
6.784                8.857   .408          -        2
10.879               8.912   .418        .290       17
11.965               8.911   .422        .303       6
30.860               8.967   .473        .366       3
31.867               8.945   .497        .328       6
June 
5.817                8.960   .476         -          1
6.854                8.991   .444        .379        5
Comparison Star      9.212   .521        .029        7
BD +21d4165


                         [FIGURE 1]


     During the period of our observations the V light curve of
the object shows a variation of 0.18m. The novalike object attains
its maximum brightness of 8.78m near 28 April 1979.





                         H.S. MAHRA
                         S.C. JOSHI
                         J.B. SRIVASTAVA
                         S.L. DHIR
                    Uttar Pradesh State Observatory
                    Manora Peak, Naini Tal-263129
                    India