Electronic Telegram No. 423 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 2006aq, 2006ar, AND 2006as The "Nearby Supernova Factory" collaboration (N. Blanc, Y. Copin, E. Gangler, and G. Smadja, Institut de Physique Nucleaire de Lyon; P. Antilogus, S. Gilles, R. Pain, and R. Pereira, Laboratoire de Physique Nucleaire et de Haute Energies de Paris; G. Aldering, S. Bailey, S. Bongard, D. Kocevski, B. C. Lee, S. Loken, P. Nugent, S. Perlmutter, R. Scalzo, R. C. Thomas, L. Wang, and B. A. Weaver, Lawrence Berkeley National Laboratory; E. Pecontal and G. Rigaudier, Centre de Recherche Astronomique de Lyon; R. Kessler, Kavli Institute for Cosmological Physics, Chicago; and C. Baltay, D. Rabinowitz, and A. Bauer, Yale University) reports the discovery of a supernova (mag approximately 19.9, calibrated to R) on NEAT images (cf. CBET 263) taken on Feb. 24.5 UT. SN 2006as is located at R.A. = 13h51m24s.88, Decl. = -11o15'26".8 (equinox 2000.0). A spectrogram (range 320-1000 nm), taken with the Supernova Integral Field Spectrograph (SNIFS) on the University of Hawaii 2.2-m telescope on Mar. 7.7 UT, reveals 2006as to be a type-Ia supernova, similar to the spectrum of SN 1990N when about three weeks past maximum light, at a redshift of z = 0.1. Also, SNIFS spectra (range 320-1000 nm) of supernovae 2006aq in MCG +07-24-32 and 2006ar in MCG +11-13-36 (cf. IAUC 8684) were obtained on Mar. 7.6 and 7.5 UT, respectively. SN 2006aq is of type II and SN 2006ar is of type Ia. The spectrum of SN 2006aq is similar to that of the type-IIb supernova 1993J at an approximate redshift of z = 0.05; 2006aq appears to have faded rapidly relative to the reported discovery magnitude. SN 2006ar is before or near maximum, with a continuum somewhat redder than normally observed in type-Ia supernovae at this phase. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2006 CBAT 2006 March 8 (CBET 423) Daniel W. E. Green