COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                    Number 2034

                                 Konkoly Observatory
                                 Budapest
                                 1981 November 3

                                 HU ISSN 0374-0676



         BD-8d4232, A NEW DELTA SCUTI STAR?

   In the course of a programme of photometry of hot hydrogen-deficient
stars (or helium stars) using the 1m telescope of the South African
Astronomical Observatory, BD-8d4232 and BD-9d4385 (= HD148021) were used
as comparisons for the helium star BD-9d4395. Figure 1 shows V-magnitudes
(colour-corrected from observations through a Stromgren "y" filter) for the
two comparison stars during a short run made on 1981 Jun 28/29. BD-8d4232

                           [FIGURE 1]


appears to vary with an amplitude of 0.03 and a period probably ~0.1d. The
slight dip in the magnitude of BD-9d4385 after H.J.D. 244 4784.48 is caused
by s transparency deterioration rather than intrinsic stellar variability.


         Table I Stromgren colours for BD-8d4232


HJD            V       (b-y)     M_1     C_1
---------------------------------------------
2444782.374   9.681    0.352    0.143   0.952
   4784.350   9.682    0.354    0.147   0.934
   4822.237   9.695    0.359    0.138   0.954
       .256   9.681    0.364    0.131   0.947
       .370   9.677    0.375    0.121   0.940
   4823.245   9.674    0.355    0.131   0.965
       .306   9.676    0.358    0.140   0.939
       .340   9.670    0.363    0.143   0.906



   Stromgren photometry of BD-8d4232 is given in Table I. The (b-y) and
C_1 indices indicate a reddening E(b-y) = 0.275 and a spectral type around A7
(cf. Crawford 1979; Table 2). The Smithsonian Star Catalogue gives a
spectral type of A5.


   The short time scale of variation and the spectral type of BD-8d4232
suggest that it is a Delta Scuti type variable (cf. Baglin et.al. 1973).




               DAVID KILKENNY
               South African Astronomical Observatory
               P O Box 9
               Observatory 7935
               South Africa




References:
Baglin, A., Breger, M., Chevalier, C., Hauck, B., le Contel, J.M.,
      Sareyan, J.P. & Valtier, J.C., 1973. Astron. Astrophys.
      23, 221. [BIBCODE 1973A&A....23..221B ]
Crawford, D.L., 1979. Astron. J., 84, 1858. [BIBCODE 1979AJ.....84.1858C ]