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IAUC 3835: SNe; 1983i

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                                                  Circular No. 3835
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

     G. D. Thompson, Brisbane, Queensland, telexes that Robert
Evans, Maclean, N.S.W., has discovered a supernova located in
M83 = NGC 5236 (R.A. = 13h34m3, Decl. = -29deg37', equinox 1950.0).
Thompson's observation on July 3.477 UT found the object 120"
west and 130" south of the galaxy's nucleus, and at mv = 13.0.
Apparent confirmation has been made by J. Hers, Sedgefield,
South Africa, on July 3.88 (via J. Mattei, AAVSO) and with a
spectrogram (114 A/mm) by Richtler at the European Southern
Observatory at La Silla.  T. Cragg, Anglo-Australian Telescope,
reports confirmation by AAT observers Tuohy, Charles and Smale
on July 4, as their unreduced spectra show wide Balmer emission.
Cragg provides the following position of the supernova: R.A. =
13h34m01s7, Decl. = -29deg38'48" (equinox 1950.0); he also notes
that the visual magnitude had brightened from 13.0 on July 3 to
12.5 on July 4.
     Paul Wild, Astronomisches Institut, Berne, reports the
discovery of a probable supernova in NGC 4220 on June 30 UT.
Located 19" east and 15" south of the galaxy's nucleus (R.A. =
12h13m7, Decl. = +48deg09', equinox 1950.0),  the object was at mpv =
14.5.  The object was confirmed on July 2.  Wild notes that a
hint of a star at mag ~ 17 roughly in the same area is on
exposures taken in 1974-75; there is a vague possibility that
the new object is therefore another type of variable.

     T. Seki, Geisei, Japan, reports the following observations
with a 0.60-m f/3.5 reflector.  The comet was at m1 = 16.5
on both nights and had a tail 1' in p.a. 220 on June 21.

          1983 UT           R.A.   (1950.0)    Decl.
          June 18.73611    20 35 12.16    - 3 24 03.7
               18.76354    20 35 11.53    - 3 23 55.0
               21.73472    20 34 05.19    - 3 07 49.1

     The corresponding orbital elements and ephemeris are not
substantially different from what was published on IAUC 3830.
The corresponding Delta-R.A. and Delta-Dec. are: July 5 ET,-0m03, -0'1;
15, -0m08, -0'1; 25, -0m15, -0'3; Aug. 4, -0m23, -0'5.

1983 July 5                    (3835)            Daniel W. E. Green

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