Central Bureau for Astronomical Telegrams
IAUC 8234: N IN M33; 2003jd, 2003je,, 2003jf
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Circular No. 8234
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)
URL http://cfa-www.harvard.edu/iau/cbat.html ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)
NOVA IN M33
G. J. Schwarz, Steward Observatory; R. M. Wagner, LBT
Observatory; S. Starrfield, Arizona State University; and P.
Szkody, University of Washington, report that spectroscopy of the
possible nova reported on IAUC 8195, with the 6.5-m MMT (range
400-900 nm; resolution 0.8 nm) on Sept. 13.44 UT, confirms the
object to be a classical nova in its early decline phase. The
spectra exhibit strong emission lines of the Balmer series of
hydrogen; numerous Fe II blends (multiplets 37, 38, 42, 48, 49, and
74); O I at 777.4 and 844.6 nm; and the Ca II infrared triplet at
854.2, 866.2, and 849.8 nm that is typical of 'Fe II'-class novae
after maximum light. The equivalent width of H_alpha emission is
40 nm, and it exhibits a pronounced castellated structure with a
FWZI of almost 5400 km/s.
SUPERNOVAE 2003jd, 2003je, AND 2003jf
A. V. Filippenko, R. T. Foley, and B. Swift, University of
California, report that inspection of CCD spectra (range 320-1000
nm), obtained on Oct. 28 UT with the Shane 3-m telescope at Lick
Observatory, reveals that SN 2003jd (IAUC 8232) is probably a
peculiar type-Ic supernova, with some similarities to SNe 1998bw
and 2002ap (Foley et al. 2003, PASP 115, 1220). The expansion
velocity, measured from the bottom of the putative Ca II
near-infrared triplet absorption line, is about 40000 km/s. The
continuum is quite blue, perhaps more so than that of other 1998bw-
like objects at a similar phase. It is possible that the object is
a 1991T-like type-Ia supernova, although the peculiar type-Ic
hypothesis is currently favored. A spectrum of SN 2003je (IAUC
8232) shows it to be of type II (perhaps type IIn), with low-
contrast H_alpha emission superposed on a nearly featureless blue
continuum. The corresponding absorption component of H_alpha is
weak or absent. A noisy spectrum of SN 2003jf (IAUC 8233) suggests
that it is a young type-II supernova with a featureless blue
continuum.
T. Matheson, P. Challis, and R. Kirshner, Harvard-Smithsonian
Center for Astrophysics, report that a spectrum (range 370-750 nm)
of SN 2003jd, obtained by P. Berlind on Oct. 28.32 UT with the Mt.
Hopkins 1.5-m telescope (+ FAST spectrograph), shows it to be a
peculiar type-Ic supernova. The spectrum shows some similarities
with SN 1998bw near maximum (Patat et al. 2001, Ap.J. 555, 900),
but it is not identical. Further observations are encouraged.
(C) Copyright 2003 CBAT
2003 October 28 (8234) Daniel W. E. Green
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