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IAUC 3981: SNe IN IC 121, NGC 991; 1984i

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                                                  Circular No. 3981
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 617-495-7244/7440/7444

     B. Szeidl, Konkoly Observatory, telexes that M. Lovas has
discovered a supernova in IC 121.  The object is located 2" west and
17" north of the center (R.A. = 1h25.8m, Decl. = +2deg15', equinox 1950.0)
of the galaxy, and on Aug. 29 UT was at mpg = 14.0.

     R. Buta, Mount Stromlo Observatory, reports a photoelectric
observation of the supernova in NGC 991 made with the 0.76-m
telescope. On Aug. 31.7 UT, the magnitude and colors (corrected for
local background) were V = 13.87, B-V = +0.49, U-B = -0.03.  The
colors, when approximately corrected for galactic and internal
reddening according to the Second Reference Catalogue of Bright Galax
ies, suggest that this is a type I supernova 13 +/- 4 days past
maximum light.

     K. Ishida, Kiso Observatory, communicates an accurate position
(1950) of the supernova in NGC 991 as follows: R.A. = 2h33m02s04, Decl. =

     B. Margon and S. Anderson, University of Washington, report
that they obtained spectrophotometric data of the supernova in NGC
991 (cf. IAUC 3979) in the 320.0-650.0-nm range on Sept. 3 and 4 UT
using the Kitt Peak 2.1-m reflector.  The spectrum is that of a
type I supernova some 20-60 days past maximum.  The object is ~ 30" west
of nucleus, contrary to previous reports.

     Several observers have remarked on a rather prominent antitail.
Some total visual magnitude estimates and tail lengths: Aug.
26.38 UT, 5.8 (J. Bortle, Stormville, NY, 10x50 binoculars); 27.38,
6.0 (Bortle, 20x80 binoculars); 29.47, 5.3 (0.15-m reflector), 0.4 deg
in p.a. ~ 80, 1.0 deg in p.a. 290 (R. Keen, Mt. Thorodin, CO, 0.30-m
reflector); 29.51, 5.6, 2 deg in p.a. ~ 315 (C. S. Morris, 20x80
binoculars, near Mt. Wilson, CA); Aug. 30.46, 5.7 (7x35 binoculars),
0.1 deg in p.a. 90, 1.3 deg in p.a. 310 (Keen, 0.30-m reflector); Sept.
1.37, 6.6, 15' in p.a. 300 (Bortle, 10x50 binoculars); 2.38, 6.2
(D. W. E. Green, Harvard College Observatory, 20x80 binoculars).

1984 September 4               (3981)            Daniel W. E. Green

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