Central Bureau for Astronomical Telegrams
IAUC 4417: 1987I; 1987A; 1987l; 1987m
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Circular No. 4417
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 617-495-7244/7440/7444
SUPERNOVA 1987I IN IC 4963
D. Allen, Anglo-Australian Observatory, reports his discovery
of a supernova located 1".6 north and 1".5 east of the center of IC
4963 (R.A. = 20h08m11s, Decl. = -55 23.7, equinox 1950.0). A low-
dispersion spectrum of the galaxy, obtained under poor conditions with
the Mt. Stromlo 1.9-m telescope on July 2.71 UT, is dominated by
features typical of a type-I SN. Observations by K. Cooper on
July 2 with the Anglo-Australian Telescope show a redshift of 0.017
as deduced from both H-alpha emission in the galaxy and the 615-nm
absorption band in the SN; the magnitude is about 16.
SUPERNOVA 1987A IN THE LARGE MAGELLANIC CLOUD
C. Perrier, Observatoire de Lyon, telexes: "Infrared speckle
observations of SN 1987A were performed in June using the scanning
slit specklegraph at the European Southern Observatory 3.6-m telescope.
The observations (in 2".0 seeing or better at V and obtained
near the meridian) were made mostly at L (3.6 microns). Various checks
were made with identical settings on binaries and pointlike sources
of similar magnitude. Fits of the data from June 16 to 23 show
marginal evidence of a circularly-symmetric extension. Attributing
50 percent of the supernova L flux to this component would yield a
FWHM of 0".057 +/- 0".030. No significant departure from circular
symmetry (which could be due to the visible companion; cf. IAUC 4382,
4391) is detected, allowing derivation of a minimum magnitude
difference (companion vs. SN) of 4 +/- 1 at L. Complementary measures
are needed to confirm the possible extension."
Visual magnitude estimates: July 4.75 UT, 4.4 (A. Beresford,
Adelaide, S. Australia); 6.82, 4.4 (R. H. McNaught, Siding Spring
Observatory); 7.36, 4.3 (Beresford); 8.83, 4.4 (McNaught).
PERIODIC COMET REINMUTH 2 (1987l)
Total visual magnitude estimates: July 6.25 UT, 14.3 (D. W.
E. Green, Oak Ridge Observatory, 0.41-m reflector); 8.40, 13.7 (D.
H. Levy, Tucson, AZ, 0.41-m reflector); 9.45, 13.8 (Levy).
PERIODIC COMET BROOKS 2 (1987m)
Total visual magnitude estimates: July 3.44 UT, 14.5: (J. V.
Scotti, Tucson, AZ, 0.4-m reflector); 4.41, 14.1 (Levy).
1987 July 9 (4417) Daniel W. E. Green
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