Electronic Telegram No. 272 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 2005il, 2005im, 2005in Further to CBET 268, J. Frieman provides the following information for three additional apparent supernovae found by the Sloan Digital Sky Survey II collaboration on multiple g, r, and i images taken with the SDSS 2.5-m telescope. Spectroscopy has not yet been obtained, but their multi-epoch light curves are suggestive of type-Ia supernovae (see Poznanski et al., 2002, PASP 114, 833; Howell et al. 2005, Ap.J., in press, and http://xxx.lanl.gov/abs/astro-ph/?0509195), with characteristic post-peak plateaus in i-band brightness. SN Discov. R.A. (2000.0) Decl. Mag. Offset Date 2005il Sep. 3 1 53 06.77 + 1 06 49.5 21.0 1" E 2005im Sep. 21 0 36 02.87 + 0 50 06.0 20.9 0".7 E, 0".8 S 2005in Sep. 26 2 13 28.18 - 0 58 05.7 21.3 -- Magnitudes for 2005il, which was not visible to limiting mag g = 22.5, r = 22, and i = 22 on the reference images from approximately two years earlier: 2005 Sept. 3, g = 20.8, r = 21.0; 14, g = 21.0, r = 20.8, i = 20.7; 16, 21.0, 21.1, 21.4; 24, 21.8, 21.1, 21.1; 25, -, 21.6, 21.5; 26, 22.1, 21.2, 21.3; 29, 22.4, 21.4, 21.3; Oct. 1, 22.5, 21.6, 21.4; 14 (preliminary), [23, -, -. Additional preliminary magnitudes for 2005im (which suffer from noise due to substantial background light from the host galaxy): Sept. 15, g > 22, r > 21.6, i > 21.6 (not detected; approximate limiting magnitudes); 24, g = 21.0, r = 21.1, i = 21.3; 25, 21.0, 21.0, 21.2; 26, 21.1, 21.1, 21.0; 27, 21.2, 21.4, 21.2; Oct. 1, 21.4, 21.1, 21.6; 11, 22.1, 21.6, 21.3; 12, 22.0, 21.3, -; 20, -, 21.7, 21.7; 23, -, 21.7, 21.8; 27, 22.9, 22.1, 21.5; 28, 22.6, 21.7, 21.5; 30, -, 22.1, 21.8. The apparent host galaxy has magnitudes g = 19.4, r = 18.5, i = 18. Magnitudes for 2005in, which itself is approximately coincident with the center of the apparent host galaxy: Sept. 24, g > 22, r > 21.5, i > 21.2 (not detected); 26, g = 21.4, r = 21.4, i = 21.3; 29, 21.1, 21.0, 21.0; Oct. 1, 20.6, 20.6, 20.7; 14, 20.7, 20.4, 20.6; 20, 21.0, 20.7, 20.9; 22, 21.2, 20.9, 21.0; 24, 21.3, 20.8, 21.2; 26, 21.5-21.9, 21.1-21.2, 21.2-21.3; 28, 21.9, 21.0, 21.5; 30, 22.3, 21.2, 21.2. The apparent host galaxy has magnitudes g = 20.7, r = 20.5, i = 20.6. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2005 CBAT 2005 November 3 (CBET 272) Daniel W. E. Green