Classification of SNe 2006D, a Premaximum Type Ia Supernova
ATel #689; The Nearby Supernova Factory: G. Aldering, S. Bailey, S. Bongard, D. Kocevski, B. C. Lee, S. Loken, P. Nugent, S. Perlmutter, R. Scalzo, R. C. Thomas, L. Wang, B. A. Weaver (Lawrence Berkeley National Laboratory, Berkeley, CA), N. Blanc, Y. Copin, E. Gangler, G. Smadja (Institut de Physique Nucleaire de Lyon), P. Antilogus, S. Gilles, R. Pain, R. Pereira (Laboratoire de Physique Nucleaire et de Haute Energies de Paris), E. Pecontal, G. Rigaudier (Centre de Recherche Astronomique de Lyon), R. Kessler (Kavli Institute for Cosmological Physics, Chicago, IL), C. Baltay, D. Rabinowitz, A. Bauer (Yale)
on 14 Jan 2006; 20:13 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: R. C. Thomas (rcthomas@lbl.gov)
Subjects: Infra-Red, Optical, Ultra-Violet, Supernovae
The Nearby Supernova Factory reports that a spectrum (range 320-1000 nm) of supernova 2006D (IAUC # 8658 ) in MCG -01-33-34, obtained January 14.6 UT with the Supernova Integral Field Spectrograph on the University of Hawaii 2.2-meter telescope 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 & Contini 2004, A&A, 416, 515 via NED), we measure Doppler shifts of the absorption minima of these lines to be around 12,000 km/s. We strongly encourage continued observations, including spectropolarimetry, of this bright event to follow the evolution of the carbon signature.
The Nearby Supernova Factory
