Electronic Telegram No. 1423 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 2008dt AND 2008du Further to CBET 1419, D. Madison, W. Li, and A. V. Filippenko, University of California at Berkeley, report the LOSS discovery of two apparent supernovae on unfiltered KAIT images: SN 2008 UT R.A. (2000.0) Decl. Mag. Offset 2008dt June 30.33 16 56 30.56 +27 58 33.2 17.2 1".0 E, 5".5 S 2008du June 30.35 22 56 11.84 + 3 55 35.4 18.3 8".2 W, 1".2 S Additional KAIT magnitudes for 2008dt in NGC 6261: June 10.34 UT, [19.5; 16.34, 19.0; 17.33, 18.9. SN 2007hu also occurred in NGC 6261. Additional KAIT magnitudes for 2008du in NGC 7422: June 10.36, [19.5; 29.34, 18.4. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2008 CBAT 2008 July 1 (CBET 1423) Daniel W. E. Green