Central Bureau for Astronomical Telegrams
IAUC 4724: 1989f; 1988aa; 1989A
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Read IAUC 4725
Circular No. 4724
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM EASYLINK 62794505
MARSDEN or GREEN@CFA.BITNET MARSDEN or GREEN@CFAPS2.SPAN
COMET SHOEMAKER (1989f)
E. M. Shoemaker reports another cometary discovery by Carolyn S.
Shoemaker on exposures with the 0.46-m Schmidt telescope at Palomar:
1989 UT R.A. (1950) Decl. m1
Jan. 11.39461 9 07 10.99 +48 39 41.3 16
14.48020 9 06 28.25 +49 19 34.4
The object is diffuse and condensed with a coma that is asymmetric
toward the southwest.
SUPERNOVA 1988aa
G. Comte, Observatoire de Marseille, telexes: "During a photometric
survey of ultraviolet-excess galaxies by means of RCA-CCD 3-color
imagery with the Pic-du-Midi 2-m Bernard Lyot telescope, I discovered a
supernova on frames taken on 1988 Dec. 14-15 at R.A. = 0h10m06s.2, Decl.
= -0d18'35" (equinox 1950.0). The stellar image of the supernova is
extremely red: B = 19.65, R(Cousins) = 17.40, I(Cousins) = 16.40. It is
projected on to a faint background extended object barely visible on the
POSS blue prints, near (2" west and 18" north of) the Kiso Ultraviolet-
excess Galaxy 0010-003. It remains marginally possible that the SN
belongs to KUG 0010-003, in which case its projected distance to the
center of the KUG is 11.5 kpc for H = 100 km s-1 Mpc-1, the redshift of
the KUG being z = 0.0392 from our unpublished spectroscopic observations.
However, it seems more plausible that the SN is located in the faint
background object, with a possibly fairly large redshift."
SUPERNOVA 1989A IN NGC 3687
J. Graham, California Insitute of Technology; and S. Perlmutter,
University of California at Berkeley, report that an uncalibrated
spectrum (range 300-700 nm) taken on Jan. 24 by P. Charles at the Isaac
Newton Telescope shows that this object appears to be a type Ia
supernova within a week of maximum light. The spectrum shows P-Cyg
profiles due to Si II, S II, Mg II and Ca II, with the absorption trough
of Si II 635.5 nm at about 609 nm.
1989 January 27 (4724) Brian G. Marsden
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