Supernovae 2006di, 2006dr, 2006dv, 2006dw, 2006dy

Abstract

R. J. Foley, J. S. Bloom, D. A. Perley, and N. R. Butler, University of California, Berkeley, report that inspection of CCD spectra (range 330-920 nm), obtained on July 25 UT with the Keck I 10-m telescope (+ LRIS) show that SNe 2006di (IAUC 8726) and 2006dv (IAUC 8733) are both of type Ia. The spectrum of 2006di is consistent with a type-Ia supernova approximately 40 days after maximum light. SN 2006dv has a spectral-feature age (Riess et al. 1997, A.J. 114, 722) of 1.5 +/- 2.0 days relative to maximum light; adopting a recession velocity of 9940 km/s, found from weak Na D absorption, the minimum of the Si II 635.5-nm absorption is found to be blueshifted by 11200 km/s.

Publication
Central Bureau Electronic Telegrams