Electronic Telegram No. 58 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 SUPERNOVAE 2003ls AND 2004D Further to IAUC 8266, R. J. Foley and A. V. Filippenko, University of California at Berkeley (UCB), report the LOSS discovery, on KAIT images taken on 2003 Dec. 22.3 (mag about 16.5) and 28.2 UT (mag about 17.0), of an apparent supernova, designated SN 2003ls and located at R.A. = 3h01m00s.37, Decl. = -10o53'32".0 (equinox 2000.0), which is 151" west and 49" north of the nucleus of PGC 11402. A KAIT image taken on Nov. 25.3 showed nothing at this position (limiting mag about 19.0). Foley, F. J. D. Serduke (Lawrence Livermore National Laboratory), R. Chornock (UCB), and Filippenko report that inspection of CCD spectra (range 330-1000 nm), obtained on 2004 Jan. 17 with the Shane 3-m telescope at Lick Observatory, reveals that SN 2003ls is of type Ia, about 1.5 months past maximum brightness; its redshift, estimated by comparing the spectrum with that of other type-Ia supernovae, is about 13000 km/s -- much greater than that of PGC 11402 (9276 km/s, from NED), so SN 2003ls must be in a faint background galaxy unrelated to PGC 11402. The LOSS team also reports the discovery of another supernova on KAIT images taken on Jan. 4.5 (mag 19.1) and 10.5 UT (mag 19.0); SN 2004D is located at R.A. = 11h56m27s.82, Decl. = +39o44'16".7, which is 4".7 west and 14".1 south of the center of UGC 6916. Nothing was visible at this position on a KAIT image taken on 2003 May 22.3 (limiting mag 19.5). Foley, Serduke, Chornock, and Filippenko add that inspection of CCD spectra, obtained as above on Jan. 17, reveals that SN 2004D is of type II, several months past maximum brightness; relatively narrow H_alpha emission is dominant, and the Ca II near-infrared triplet emission is also visible, but [O I] and [Ca II] are weak or nonexistent, so the object has not yet reached the nebular phase. NOTE: These 'Central Bureau Electronic Telegrams' are intended to be preliminary announcements of items that later appear in the formal IAU Circulars. Citations should normally be made to IAUCs rather than to CBETs. (C) Copyright 2004 CBAT 2004 January 19 (CBET 58) Daniel W. E. Green