Electronic Telegram No. 754 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 2006ot IN ESO 544-G31 Further to IAUC 8771, N. Joubert and W. Li report the LOSS discovery of an apparent supernova (mag 17.4) on unfiltered KAIT images taken on Nov. 22.28 UT. SN 2006ot is located at R.A. = 2h15m04s.84, Decl. = -20o45'58".2 (equinox 2000.0), which is 3".3 east and 5".4 north of the center of ESO 544-G31. A KAIT image taken on Oct. 20.39 showed nothing at this position (limiting mag 18.5). R. J. Foley and A. V. Filippenko, University of California, Berkeley, report that inspection of CCD spectra (range 300-950 nm), obtained on Nov. 23 UT with the Keck I 10-m telescope (+ LRIS), shows that 2006ot is a type-Ia supernova with a spectral-feature age (Riess et al. 1997, A.J. 114, 722) of -4.7 +/- 2 days relative to maximum light. Adopting a recession velocity of 15871 km/s (da Costa et al. 1998, A.J. 116, 1), the minimum of the Si II 635.5-nm absorption is found to be blueshifted by 16800 km/s. The object has a prominent ultraviolet excess relative to most type-Ia supernovae. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2006 CBAT 2006 November 23 (CBET 754) Daniel W. E. Green