Electronic Telegram No. 1713 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 2009aq AND 2009ar A. Mahabal, A. J. Drake, S. G. Djorgovski, R. Williams, and M. J. Graham, California Institute of Technology; M. Catelan, Pontificia Universidad Catolica; E. C. Beshore, S. M. Larson, A. Bottanni, and R. Hill, Lunar and Planetary Laboratory, University of Arizona; and E. Christensen, Gemini Observatory, report the Catalina Real-time Transient Survey discovery of two supernovae in unfiltered Catalina Sky Survey images: SN 2009 UT R.A. (2000.0) Decl. Mag. Offset 2009aq Feb. 13.16 3 09 19.79 +16 05 05.3 16.8 0".5 E, 2".5 S 2009ar Feb. 19.27 9 55 25.71 - 1 28 21.3 18.5 -- The host galaxy to 2009aq appears to be a 23rd-magnitude object seen in unfiltered images (limiting mag 24.2) from the NOAO "deep ecliptic survey". The presumed host galaxy to 2009ar, SDSS J095525.67-012821.0, has Gunn magnitudes u = 23.2, g = 21.7, r = 21.5, i = 21.6, z = 21.9. Confirmation spectra were obtained with the Palomar 5-m telescope (+ DBS) on Feb. 25 UT. Cross-correlation was carried out with a library of supernova spectra using the "Supernova Identification" code (Blondin and Tonry 2007, Ap.J. 666, 1024). This indicates that 2009aq is a normal type-Ia supernova at z = 0.031 and is most similar to SN 1998bu at twelve days past maximum light. SN 2009ar is a type-IIb supernova at z = 0.026 and is most like SN 1996cb at one day past maximum. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2009 CBAT 2009 March 6 (CBET 1713) Daniel W. E. Green