[IAUC] CBET 2087: 20091221 : SUPERNOVAE 2009kl AND 2009mg

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                                                  Electronic Telegram No. 2087
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 2009kl AND 2009mg
     J. Prieto, Carnegie Observatories, reports that optical spectra (range
400-900 nm; resolution 0.7 nm) of the supernovae 2009kl (cf. CBET 1993) and
2009mg (cf. CBETs 2071, 2077) were obtained with the Magellan-Clay 6.5-m
telescope (+ LDSS3) at Las Campanas Observatory on Dec. 21.3 UT.  The spectra
show that 2009kl is a type-II supernova and 2009mg is a type-Ia supernova.
After cross-correlating with a library of supernova spectra using SNID
(Blondin and Tonry 2008, Ap.J. 666, 1024), SN 2009kl is found to be is most
similar to the type-II-P supernova 2004et at 80 days after explosion, and SN
2009mg is best matched by a normal type-Ia supernova at 10 days after
maximum brightness.  After correcting the spectrum of SN 2009kl for the
recession velocity of its host galaxy, IC 2584 (+4403 km/s; Theureau et al.
1998, A.Ap. Suppl. 130, 333), an expansion velocity of 6000 km/s is measured
from the blue-shifted absorption of the H-alpha P-Cyg profile.


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                         (C) Copyright 2009 CBAT
2009 December 21                 (CBET 2087)              Daniel W. E. Green