Electronic Telegram No. 321
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 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


SUPERNOVAE 2005lr, 2005lt, 2005lu, 2005lw
     M. Hamuy and J. Maza, University of Chile; and N. Morrell,
Las Campanas Observatory, on behalf of the Carnegie Supernova Project,
report spectroscopic observations (range 400-1000 nm) of SN 2005lr
(cf. IAUC 8641), SN 2005lt (cf. IAUC 8645), SN 2005lu (cf. IAUC 8645),
and SN 2005lw (cf. CBET 318) obtained on Dec. 18.29, 18.35, 18.15,
and 18.31 UT, respectively, with the European Southern
Observatory 3.5-m New Technology Telescope (+ EMMI spectrograph).
     The spectrum of SN 2005lr bears resemblance to that of the type-Ic
supernova 1990B obtained 24 days past maximum light (Clocchiatti et al/
2001, Ap.J. 553, 886).
     SN 2005lt is a type-Ia supernova about two weeks past maximum
light, in agreement with the expansion velocity reported by Kahu and
Anupama (cf. CBET 319).
     SN 2005lu is a type-Ia supernova near maximum light.  Assuming
the recession velocity of 9650 km/s for the host galaxy (da Costa et al.
1998, A.J. 116, 1), an expansion velocity of 11800 km/s is derived from
the absorption minimum of the Si II 635.5-nm doublet.  A narrow
interstellar Na I 589.3-nm absorption at the redshift of the host
galaxy is detected with an equivalent width of 0.20 nm, suggesting
significant dust reddening.
     SN 2005lw is a young type-II supernova with the characteristic
H-alpha and He I 587.5-nm P-Cyg line profiles.  Assuming the recession
velocity of 7710 km/s for the host galaxy (da Costa et al. 1998, A.J.
116, 1), an expansion velocity of 10400 km/s is derived from the
absorption minimum of the H-beta line.  A narrow interstellar Na I
589.3-nm absorption at the redshift of the host galaxy is detected with
an equivalent width of 0.27 nm, suggesting significant dust reddening.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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                         (C) Copyright 2005 CBAT
2005 December 20                 (CBET 321)               Daniel W. E. Green