2006CBET..487....1B

S. Blondin, M. Modjaz, R. Kirshner, and P. Challis, Harvard-Smithsonian Center for Astrophysics, report that a spectrogram (range 350-740 nm) of SN 2006br (cf. CBET 482), obtained by W. Brown on Apr. 27.36 UT with the F. L. Whipple Observatory 1.5-m telescope (+ FAST), shows it to be a reddened type-Ia supernova with a spectral-feature age (Riess et al. 1997, A.J. 114, 722) of about 1 week before maximum brightness. Adopting a recession velocity of 7353 km/s for the host galaxy (from "The Updated Zwicky Catalog", http://tdc-www.harvard.edu/uzc/), the maximum absorption in the Si II line (rest 635.5 nm) is blueshifted by 13500 km/s. Also, interstellar Na I D absorption at the redshift of the host galaxy is visible in the spectrum with an equivalent width of 0.3 nm. Blondin et al. add that a spectrogram (range 350-740 nm) of SN 2006bs (cf. CBET 484), obtained by Brown on Apr. 27.18 UT, shows it to be a type-II supernova roughly 2-3 weeks past maximum, confirming the classification given in CBET 484 by Filippenko and Foley. The spectrum consists of a blue continuum with P-Cyg lines of hydrogen, sodium, and iron, consistent with the plateau phase of a normal type-II supernova. The spectrum is similar to the type-II-plateau supernova 2004et at 17 days past maximum. Adopting a recession velocity of 9007 km/s for the host galaxy (Beers et al. 1995, A.J. 109, 874), the maximum absorption in the H_beta line (rest 486.1 nm) is blueshifted by 12000 km/s.