Central Bureau for Astronomical Telegrams
IAUC 3835: SNe; 1983i
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Read IAUC 3836
Circular No. 3835
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
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
SUPERNOVAE
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.
PERIODIC COMET RUSSELL 3 (1983i)
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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