Electronic Telegram No. 366 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 2006D AND 2006E The "Nearby Supernova Factory" collaboration (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, Berkeley; 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; E. Pecontal and G. Rigaudier, Centre de Recherche Astronomique de Lyon; R. Kessler, Kavli Institute for Cosmological Physics, Chicago; C. Baltay, D. Rabinowitz, and A. Bauer, Yale University) reports that a spectrum (range 320-1000 nm) of SN 2006D in MCG -01-33-34 (IAUC 8658), obtained Jan. 14.6 UT with the University of Hawaii 2.2-m telescope (+ Supernova Integral Field Spectrograph = SNIFS), reveals that it is a type-Ia supernova about one week prior to maximum. Most striking is the clear signature of C II 657.8-nm. Concomitant features from C II 426.7-, 472.0-, and 723.3-nm are also present. Once the spectrum is corrected for the host redshift (z = 0.008526, Davoust and Contini 2004, A.Ap. 416, 515, via NED), Doppler shifts of the absorption minima of these lines are measured to be around 12000 km/s. Continued observations, including spectropolarimetry, are strongly encouraged of this bright event to follow the evolution of the carbon signature. A SNIFS spectrum of 2006E in NGC 5338 (IAUC 8658), obtained on Jan. 14.6, reveals that it is a type-Ia supernova a few weeks past maximum light. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2006 CBAT 2006 January 14 (CBET 366) Daniel W. E. Green