Central Bureau for Astronomical Telegrams
IAUC 5468: 1992K; 1992J; UW Cen AND V854 Cen
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Circular No. 5468
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
SUPERNOVA 1992K IN ESO 269-G57
M. Hamuy, Cerro Tololo Interamerican Observatory; and J. Maza,
University of Chile, report: "R. Antezana (University of Chile) has
discovered a supernova located about 2" west and 14" south of the
nucleus of the spiral galaxy ESO 269-G57 (R.A. = 13h07m10s, Decl. =
-46 10'.2, equinox 1950.0). The supernova was found on a 20-min
unfiltered IIa-O plate taken by L. Wells and R. C. Smith (CTIO) with
the CTIO Curtis Schmidt telescope on Mar. 3.318 UT. Confirmation
was made by N. Suntzeff (CTIO) from B and V CCD images obtained on
Mar. 6.3 with the CTIO 4-m telescope; the V image yields a magnitude
of 16.23 for the supernova. A low-dispersion spectrogram (range
350.0-760.0 nm) was obtained by M. M. Phillips (CTIO) on Mar. 6.3
with the CTIO 1.5-m telescope. Although the appearance of this
spectrum resembles that of the type-Ic supernova 1983V about 1-2
weeks after B maximum, a much better match is made with a spectrum
of the peculiar type-Ia supernova 1991bg obtained about 2 weeks
after maximum. In particular, a fairly strong absorption feature at
621.5 nm is clearly present, which corresponds very well to a feature
in the spectrum of SN 1991bg identified with the Si II 635.5-nm
line. Further spectroscopic observations will be needed to clarify
the true nature of this event."
SUPERNOVA 1992J IN ANONYMOUS GALAXY
M. M. Phillips, Cerro Tololo Interamerican Observatory, reports
that a spectrogram of SN 1992J (cf. IAUC 5467) obtained with the
CTIO 1.5-m telescope on Mar. 6.12 UT shows that this is a type-Ia
supernova about 2 weeks past maximum. A spectrum was also obtained
of the nucleus of the host galaxy, yielding a redshift of 0.045.
UW CENTAURI AND V854 CENTAURI
These R CrB-type variables are again fading. Visual magnitude
estimates of UW Cen: Feb. 24.0 UT, 9.5 (D. Overbeek, Edenvale, South
Africa); 26.47, 9.6 (P. F. Williams, Heathcote, N.S.W.); 28.1, 9.7
(Overbeek); 29.1, 9.8 (Overbeek); Mar. 3.1, 10.2 (Overbeek); 3.73,
9.9 (Williams); 3.8, 10.6 (Overbeek); 5.57, 10.3 (Williams). Visual
magnitude estimates of V854 Cen: Feb. 17.70, 8.3 (Williams); 22.74,
8.5 (Williams); 25.0, 8.0 (Overbeek); 26.1, 8.7: (Overbeek); 26.48,
9.5 (Williams); 29.8, 9.8 (Overbeek); Mar. 3.1, 9.6 (Overbeek); 4.1,
9.5 (Overbeek); 5.56, 9.5 (Williams).
1992 March 9 (5468) Daniel W. E. Green
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