Electronic Telegram No. 1727 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://www.cfa.harvard.edu/iau/cbat.html SUPERNOVAE 2009aw AND 2009ax D. Sand, Harvard-Smithsonian Center for Astrophysics and Las Cumbres Observatory Global Telescope Network; M. L. Graham and C. Bildfell, University of Victoria; D. W. Just, S. Herbert-Fort, and S. Sivanandam, Steward Observatory; C. J. Pritchet and H. Hoekstra, Leiden University; and D. Zaritsky, Steward Observatory, report that two supernovae wre discovered on g'- and r'-band images obtained at the Canada-France-Hawaii Telescope (+ Megacam). The publicly available "Supernova Identification" code (Blondin and Tonry 2007, Ap.J. 666, 1024) was utilized for determining that both objects are normal type-Ia supernovae from spectroscopy obtained with the MMT (+ Hectospec) at Mount Hopkins. SN 2009 UT R.A. (2000.0) Decl. g' r' Offset 2009aw Jan. 25 6 31 47.08 +24 55 08.9 19.8 19.5 5".17 E, 4".28 N 2009ax Jan. 27 6 15 35.80 +48 18 50.0 20.4 19.9 0".82 W, 0".38 N A spectrum of 2009aw taken on Jan. 29 UT shows it to be a type-Ia supernova at z = 0.08 and close to maximum light; its host galaxy has magnitudes g' = 19.56 +/- 0.02 and r' = 18.78 +/- 0.01. A spectrum of 2009ax taken on Feb. 1 shows it to be a type-Ia supernova at z = 0.11 and 15-20 days after maximum light; its host galaxy has magnitudes g' = 21.03 +/- 0.02 and r' = 20.49 +/- 0.01. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2009 CBAT 2009 March 20 (CBET 1727) Daniel W. E. Green