COMMISSION 27 OF THE I. A. U.
            INFORMATION BULLETIN ON VARIABLE STARS
                         Number 3414  
                  
                                         Konkoly Observatory
                                         Budapest
                                         5 January 1990

                                         HU ISSN 0374 - 0676




      BV PHOTOELECTRIC PHOTOMETRY OF SN 1987A IN SOUTH BRASIL

   We present, in the Table I, the BV photometric observations of SN
1987A carried out at the Morro Santana Observatory, Porto Alegre, Brasil,
during 1987, from 8 through 277 days after the core collapse.

   The observations were made in the Johnson's B and V filters, by a
photometer attached to the 0.50 m Zeiss Cassegrain telescope operated by
Departamento de Astronomia, Instituto de Fisica, UFRGS.
   As comparison stars we have used HD 38617 (spectral type KS III, V =
7.52, B-V = +1.22), HD 36584 (F0, 6.02, +0.35), and Delta Doradus (A6 IV,
4.34, +0.22). Standard deviations of the measurements have typically varied
from 0.01 through 0.14 magnitudes. Time has been counted from the observed
Kamiokande-IMB neutrino pulse (e.g., Hirata, et al. 1987, Svoboda et al.,
1987).


                  Table I: BV data



TIME (DAYS)   V        B-V    TIME (DAYS)   V        B-V

  8.672      4m45      1m01   105.628      3m39      1m74
  9.694                1.04   106.638      3.46      1.62
 11.772      4.35      1.32   108.634      3.53      1.74
 12.762      4.36      1.31   113.638      3.93      1.75
 19.683      4.24             117.640      4.07
 20.764      4.20      1.52   122.630      4.33
 60.663                1.61   123.628      4.28      1.79
 63.677                1.58   179.946      4.86      1.57
 65.804      3.16      1.63   189.998      4.99      1.60
 75.667      2.96      1.55   208.907      5.25      1.57
 76.637      2.92      1.62   211.888      5.24      1.52
 77.705      3.07             238.755      5.40      1.47
 81.705      3.04      1.57   241.976      5.50
 92.670      3.01      1.62   249.838      5.59      1.39
103.613      3.38      1.67   250.843      5.54
104.641      3.39      1.70   277.721      5.75      1.42

   The observations summarized here constitute an additional independent
although smaller photometric dataset for SN 1987A, others being those by
Hamuy et al. (1988), Menzies et al. (1987), Catchpole et al. (1987a,b), and
Dopita et al. (1988).
   I wish to thank to all observers who have contributed with observations: 
S.O. Kepler, S.H.B. Livi, C. Bevilacqua, C. Winge, H.A. Dottori, and
I. Menna. I am also grateful to C. Bevilacqua, I. Menna, G. Bello and W.
Marques, for their technical and logistic support. This paper has been 
supported by CNPq and FINEP.



                        L.A.L. da SILVA

                        Departamento de Astronomia
                        Instituto de Fisica, UFRGS
                        Caixa Postal 15051 - 91500
                        Porto Alegre, Brasil

References:

Catchpole, R.M. et al.: 1987a, M. N. R. A. S., 229, 15P. [BIBCODE 1987MNRAS.229P..15C ]
Catchpole, R.M. et al.: 1987b, M. N. R. A. S., 231, 75P. [BIBCODE 1988MNRAS.231P..75C ]
Dopita, M.A. et al.: 1988, Astron. J., 95, 1717[BIBCODE 1988AJ.....95.1717D ]
Hamuy, M., Suntzeff, N.B., Gonzalez, R. Martin, G.: 1988, Astron.
      J., 95, 63.[BIBCODE 1988AJ.....95...63H ]
Hirata, K. et al.: 1987, Phys. Rev. Lett., 58, 1490.[BIBCODE 1987PhRvL..58.1490H ]
Menzies, J.W. et al.: 1987, M. N. R. A. S., 227, 39P.[BIBCODE 1987MNRAS.227P..39M ]
Svoboda, R. et al.: 1987, in E.S.O. Workshop on the SN 1987A, ed. I.J.
      Danziger, (Garching: E.S.O.), p.229.[BIBCODE 1987ESOC...26..229S ]