Electronic Telegram No. 2158
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)
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SUPERNOVA 2009mg IN ESO 121-G26
     M. Stritzinger, Carnegie Observatories, reports that three spectra of SN
2009mg (cf. CBET 2071, 2077), obtained with the Gemini South Telescope (+
GMOS) on Jan. 6.2, 7.2, and 18.2 UT, reveal that this object was misclassified
for a second time on CBET 2093 by Roming et al.  SN 2006mg is clearly a normal
type-IIb event and not a broad-line type-Ic supernova.  Comparison with a
library of supernova spectra (Blondin and Tonry 2007, Ap.J. 666, 1024)
suggests that this object is most similiar to supernovae 1996cb and 1993J.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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                         (C) Copyright 2010 CBAT
2010 January 31                  (CBET 2158)              Daniel W. E. Green