Electronic Telegram No. 581 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://cfa-www.harvard.edu/iau/cbat.html SUPERNOVA 2006dt IN NGC 5681 Further to IAUC 8731, N. Lee and W. Li report the LOSS discovery of an apparent supernova (mag 16.8) on an unfiltered KAIT image taken on July 20.20 UT. SN 2006dt is located at R.A. = 14h35m43s.11, Decl. = +8o17'55".8 (equinox 2000.0), which is 2".9 east and 6".2 south of the nucleus of NGC 5681. Additional magnitudes for SN 2006dt: July 11.20, [19.0; 15.23, 17.5. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2006 CBAT 2006 July 21 (CBET 581) Daniel W. E. Green