Electronic Telegram No. 2473 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION CBAT Director: Daniel W. E. Green; Hoffman Lab 209; Harvard University; 20 Oxford St.; Cambridge, MA 02138; U.S.A. e-mail: cbatiau@eps.harvard.edu (alternate cbat@iau.org) URL http://www.cbat.eps.harvard.edu/index.html Prepared using the Tamkin Foundation Computer Network SUPERNOVAE 2010hz, 2010ic, AND 2010id J. M. Silverman, S. B. Cenko, J. Choi, and A. V. Filippenko, University of California, Berkeley, report that inspection of CCD spectra (range 340-980 nm), obtained on Oct. 1 UT with the 3-m Shane reflector (+ Kast) at Lick Observatory, shows that 2010hz (CBET 2462) is a type-Ia supernova; after removal of the host-galaxy recession velocity of 7300 km/s, determined from narrow emission features, the absorption minimum of the Si II 635.5-nm line is found to be blueshifted by about 11400 km/s. Cross-correlation with a library of supernova spectra using the "SuperNova IDentification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) indicates that 2010hz is about one week past maximum brightness. SN 2010ic (CBET 2465) is a type-II supernova with well-developed Balmer lines having P-Cyg profiles; after removal of the host-galaxy recession velocity of 4600 km/s, determined from narrow emission features, the absorption minimum of the H-alpha line is found to be blueshifted by about 9900 km/s. Silverman et al. also confirm the findings of Kasliwal et al. (http://www.astronomerstelegram.org/?read=2862) that SN 2010id (CBET 2467), referred to by Kasliwal et al. as PTF10vdl, is a type-II supernova at the same redshift as its host galaxy, NGC 7483. The emission component of the H-alpha line substantially dominates over the absorption component. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2010 CBAT 2010 October 2 (CBET 2473) Daniel W. E. Green