2010CBET.2158....1S

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.