Central Bureau for Astronomical Telegrams
IAUC 7819: 2002ar; 2002as; 2002ao; Corrs
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Circular No. 7819
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
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Phone 617-495-7440/7244/7444 (for emergency use only)
SUPERNOVA 2002ar IN NGC 3746
W. D. Li, University of California at Berkeley, reports the
LOTOSS (cf. IAUC 7514) discovery of an apparent supernova (mag
about 16.5) on unfiltered CCD images taken with the 0.8-m Katzman
Automatic Imaging Telescope (KAIT) on Feb. 3.5 and 4.5 UT. SN
2002ar is located at R.A. = 11h37m43s.92, Decl. = +22o00'34".4
(equinox 2000.0), which is 3".3 east and 0".5 south of the nucleus
of NGC 3746. A KAIT image taken on Jan. 18.5 showed nothing at
this position (limiting mag about 19.0).
SUPERNOVA 2002as IN UGC 3418
Li also reports the LOTOSS discovery of an apparent supernova
(mag about 17.8) found by D. Weisz on an unfiltered KAIT image
taken on Feb. 4.3 UT. SN 2002as is located at R.A. = 6h12m25s.05,
Decl. = +44o26'16".8 (equinox 2000.0), which is 11".3 west and 3".2
south of the nucleus of UGC 3418. The new object is confirmed at
about the same brightness in an earlier KAIT image taken on Jan.
30.4. A KAIT image taken on Jan. 21.4 showed nothing at this
position (limiting mag about 19.5).
SUPERNOVA 2002ao IN UGC 9299
A. Gal-Yam and O. Shemmer, Tel Aviv University, write: "A full
reduction of a spectrum (range 400-780 nm) of SN 2002ao, obtained
with the Wise Observatory 1-m telescope (+ FOSC spectrograph) on
Jan. 31 by J. Dann, confirms the findings reported on IAUC 7810
from an earlier spectrum. The spectrum is quite blue, with the
continuum rising by at least a factor of 2 between 700 and 500 nm.
Strong absorption troughs are observed at 570 and 630 nm, and an
emission feature around 590 nm is also seen. The blue continuum
and strong absorption at 570 nm are not typical of early spectra of
type-Ic supernovae (e.g., Matheson et al. 2001, A.J. 121, 1648),
and they are not apparent in the spectrum of the type-Ic SN 1999bz
referred to on IAUC 7815. The resemblance of SN 2002ao spectra to
early-time counterparts of the type-IIb SN 1996cb persists, making
this type a likely identification for SN 2002ao. We encourage
further spectroscopic observations of this object at later epochs."
CORRIGENDA
On IAUC 7773, 'Supernova 2001ib', line 16, FOR 20001ib READ
2001ib
On IAUC 7794, 'Novae in M31', line 17, FOR supernovae READ
novae
(C) Copyright 2002 CBAT
2002 February 5 (7819) Daniel W. E. Green
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