Electronic Telegram No. 214 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 2005du The 'Nearby Supernova Factory' group (P. Antilogus, G. Garavini, S. Gilles, and R. Pain, Laboratoire de Physique Nucleaire et de Haute Energies de Paris; G. Aldering, S. Bailey, B. C. Lee, S. Loken, P. Nugent, S. Perlmutter, R. Scalzo, R. C. Thomas, L. Wang, and B. A. Weaver, Lawrence Berkeley National Laboratory, Berkeley; C. Bonnaud and E. Pecontal, Centre de Recherche Astronomique de Lyon; N. Blanc, S. Bongard, Y. Copin, E. Gangler, L. Sauge, and G. Smadja, Institut de Physique Nucleaire de Lyon; R. Kessler, Kavli Institute for Cosmological Physics, Chicago; and C. Baltay, D. Rabinowitz, and A. Bauer, Yale University) reports the discovery of an apparent supernova (mag 19.7) on an unfiltered CCD image obtained on Aug. 8.5 UT with the QUEST II camera on the Palomar Oschin 1.2-m Schmidt telescope (taken in the course of the Jet Propulsion Laboratory's Near-Earth Asteroid Tracking component of the Palomar-QUEST survey). SN 2005du, which was confirmed photometrically on Aug. 11.5 with the Lick 1-m Nickel reflector and found to be a type-II via spectroscopic observations with the 5-m Palomar reflector by A. Gal-Yam on Aug. 17, is located at R.A. = 0h09m34s.7, Decl. = +12o45'21".4 (equinox 2000.0). NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the formal IAU Circulars. (C) Copyright 2005 CBAT 2005 September 3 (CBET 214) Daniel W. E. Green