Electronic Telegram No. 1665 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) URL http://www.cfa.harvard.edu/iau/cbat.html SUPERNOVAE 2009I, 2009J, AND 2009K M. Stritzinger, Las Campanas Observatory (LCO), on behalf of the Carnegie Supernova Project, reports that he obtained spectra (range 380-940 nm) of 2009I (cf. CBET 1660), 2009J (cf. CBET 1661), and 2009K (cf. 1663) on Jan. 17.1 UT with the 6.5-m Magellan II (Clay) telecope (+ LDSS3). The spectrum of 2009I reveals it to be a young type-Ia supernova. Comparison with a library of spectra via the "Supernova Identification"code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) suggests that 2009I is very similar to SN 2003du at 7-10 days before maximum; adopting a host-galaxy recession velocity of 7845 km/s (Catinella et al. 2005, A.J. 130, 1037) for the host galaxy (NGC 1080), Si II is measured to be blue-shifted by roughly 11000 km/s. Supernova 2009J appears to be a peculiar type-Ia supernova; with the aid of SNID, he finds this event to be most similar to SN 2005hk a few days past maximum. Supernova 2009K is a young type-II event soon after explosion; its spectrum exhibits shallow P-Cyg profiles of the Balmer series and He I (587.6 nm). E. Prosperi, Castelmartini, Italy, reports the following unfiltered CCD magnitudes obtained with a 0.35-m f/10 Schmidt-Cassegrain reflector: SN 2009I, Jan. 16.845 UT, 16.6; SN 2009K, Jan. 16.872, 16.1. Peter Marples, Loganholme, Queensland, Australia, reports his independent discovery of SN 2009J on a CCD image takenon Jan. 14.456 UT with a 30-cm reflector (+ Starlight Xpress camera). C. Drescher (Brisbane) measured red mag 17.5 and the following position for 2009J, apparently from Marples' discovery frame: R.A. = 5h55m21s.09, Decl. = -76o55'20".7 (equinox 2000.0). NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2009 CBAT 2009 January 19 (CBET 1665) Daniel W. E. Green