[IAUC] CBET 2049: 20091126 : SUPERNOVAE 2009lr, 2009ls, 2009lt, 2009lu, AND 2009lv

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                                                  Electronic Telegram No. 2049
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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SUPERNOVAE 2009lr, 2009ls, 2009lt, 2009lu, AND 2009lv
     H. Yamaoka, Kyushu University, forwards the report by K. Itagaki
(Yamagata, Japan) that SN 2009ls in NGC 3423 (cf. CBET 2041) was not
visible on a CCD image taken on Nov. 6.795 UT with a 0.60-m reflector
(limiting mag about 18.0).
     Ondrej Pejcha, Ohio State University; and Jose Prieto, Carnegie
Observatory, report that optical spectra (range 380-720 nm; resolution 0.8 nm)
of supernova 2009ls were obtained with the Hiltner 2.4-m telescope (+ CCDS)
at MDM Observatory on Nov. 25.53 UT.  The spectrum shows a blue continuum
with broad Balmer lines, characteristic of a young type-II supernova.  After
correcting for the recession velocity of NGC 3423 (+1011 km/s; de Vaucouleurs
et al. 1991, Third Reference Catalogue of Bright Galaxies; via NED), an
expansion velocity of 12500 km/s is measured from the blue-shifted absorption
of the H-alpha P-Cyg profile.  The following Sloan magnitude measurements were
obtained with RETROCAM on the Hiltner 2.4-m telescope:  Nov. 25.501 UT, g'
= 14.74 +/- 0.09; 25.503, r' = 14.78 +/- 0.08; 25.506, i' = 14.88 +/- 0.09.
     T. N. Steele, C. V. Griffith, I. K. W. Kleiser, and A. V. Filippenko,
University of California, Berkeley, report that inspection of a CCD spectrum
(range 340-1020 nm), obtained on Nov. 25 UT with the 3-m Shane reflector (+
Kast) at Lick Observatory, shows that SN 2009lv (CBET 2045) is a normal
type-Ia supernova shortly after maximum light; cross-correlation with a
library of supernova spectra using the "SuperNova IDentification" code (SNID;
Blondin and Tonry 2007, Ap.J. 666, 1024) indicates that it is most similar to
SN 1994ae at about three days past maximum.  SN 2009lr (CBET 2040) is a
type-Ia supernova a few days prior to maximum light; it most closely
resembles supernova-1999aa-like objects (Li et al. 2001, Ap.J. 546, 734;
Garavini et al. 2004, A.J. 128, 387).  SN 2009lt (CBET 2043) is a normal
type-Ia supernova about one month past maximum light; cross-correlation with
SNID indicates that it is most similar to SN 1994M at 34 days past maximum.
SN 2009ls is a young type-II supernova, with a very blue continuum but clear
P-Cyg profiles of hydrogen Balmer lines.  SN 2009lu (CBET 2044) is a probable
supernova, showing some broad undulations, but the signal-to-noise ratio is
too low for a secure classification.


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                         (C) Copyright 2009 CBAT
2009 November 26                 (CBET 2049)              Daniel W. E. Green