Electronic Telegram No. 1748 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 2009by AND 2009bz Further to CBET 1736, A. Narla, X. Parisky, S. B. Cenko, W. Li, and A. V. Filippenko, University of California, report the LOSS discovery of two apparent supernovae on unfiltered KAIT images: SN 2009 UT R.A. (2000.0) Decl. Mag. Offset 2009by Mar. 29.28 11 13 56.22 + 4 17 58.5 18.5 54".1 E, 31".5 N 2009bz Mar. 29.48 15 19 26.04 +11 03 30.1 16.8 15".3 E, 14".1 N Additional KAIT magnitudes for 2009by in UGC 6260: a co-addition from Jan. 4 to Mar. 19, [19.5; Mar. 30.31 UT, 18.5. Additional KAIT magnitudes for 2009bz in UGC 9814: Mar. 21.53, [19.1; 30.45, 16.9. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2009 CBAT 2009 March 30 (CBET 1748) Daniel W. E. Green