Electronic Telegram No. 2167 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION CBAT Director: Daniel W. E. Green; Room 209; Dept. of Earth and Planetary Sciences; Harvard University; 20 Oxford St.; Cambridge, MA 02138; U.S.A. e-mail: cbat@cfa.harvard.edu; dwe_green@eps.harvard.edu URL http://www.cfa.harvard.edu/iau/cbat.html SUPERNOVAE 2010V AND 2010X D. Milisavljevic and R. Fesen, Dartmouth College, report that low-dispersion optical spectra (range 430-790 nm) of 2010V (cf. CBET 2162) and 2010X (CBET 2166) were obtained with the 2.4-m Hiltner telescope (+ CCDS) at MDM Observatory on Feb. 8.4 UT. Comparison with a library of supernova spectra using the "Supernova Identification" tool (SNID; Blondin and Tonry 2007, ApJ., 666, 1024) shows that the spectrum of 2010V closely matches that of the type-Ia normal supernova 2002bo at approximately 24 days post-maximum light; the spectrum of 2010X resembles the type-Ic supernovae 1994I and 2004aw at a few days before maximum light. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2010 CBAT 2010 February 8 (CBET 2167) Daniel W. E. Green