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IAUC 3548: SN IN NGC 1316; Prob. N IN Cyg; N Sgr 1980; BD +15 4264; SN IN NGC 6946

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                                                  Circular No. 3548
Central Bureau for Astronomical Telegrams
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM     Telephone 617-864-5758

     J. Maza, Department of Astronomy, University of Chile, telexes
that M. Wischnjewsky has discovered a supernova in NGC 1316 = Fornax
A (R.A. = 3h20m.8, Decl. = -37o23', equinox 1950.0) on a plate taken by
Maza on Nov. 30.181 UT, at which time the photographic magnitude
was 14.0.  The object, which is located 220" east and 20" south of
the galaxy's nucleus, had brightened to mpg = 12.5 on Dec. 7.115 UT.

     A. C. Porter, Harvard-Smithsonian Center for Astrophysics, assisted
by D. Danby and G. Wright, has measured the following precise
position from a plate taken by Danby at Harvard University on
Dec. 7: R.A. = 21h40m46s.0, Decl. = +31o13'45" (equinox 1950.0).

     H. Kosai, Tokyo Astronomical Observatory, communicates the
following photoelectric observations, obtained on Dec. 8.5 UT by K.
Ishida, K. Hamajima and T. Mikami at the Okayama Station: V = 10.09,
B-V = +1.67, V-R = +1.51, V-I = +3.28 (Johnson system).

     D. di Cicco, Sky and Telescope, communicates the following
magnitude estimates, derived by him from Tri-X exposures obtained by B.
Mayer, Los Angeles: Oct. 28.105 UT (prediscovery), ~ 8.6; Nov.
2.094, 9.5+; 4.096, ~ 10; 8.101, 10+.  No obvious image can be detected
on an Oct. 11.16 UT exposure with limiting magnitude 10+.

BD +15 4264
     J. C. Ralph, Department of Physics, Trent University, Oshawa,
Ontario, writes that examination of about a dozen wide-field
photographs taken over an interval of about one month suggests that the
star BD +15 4264 (R.A. = 20h46m41s, Decl. = +16o02'.6, equinox 1950.0) was
at least one magnitude fainter than normal (mpg ~ 11.2) on two
exposures taken around Sept. 7.17 UT.

     Visual magnitude estimates: Nov. 18.987 UT, 11.9 (J. DeYoung,
Palmyra, VA); Dec. 4.75, 12.6 (S. Baroni and M. Cavagna, Milan).

1980 December 11               (3548)              Brian G. Marsden

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