Central Bureau Electronic Telegrams, 612, 2 (2006/September-0)
Supernovae 2006el, 2006em, 2006ep, 2006eq.
BLONDIN S. and BERLIND P.
Abstract (from CDS):
Blondin et al. add that that spectra (range 350-740 nm) of SN 2006em (cf. CBET 605, IAUC 8741) and SN 2006eq (cf. CBET 611), obtained on Sept. 2.43 and 2.28 by Berlind, shows them to be both type-Ia supernovae around maximum light. Cross-correlation with a library of supernova spectra shows that 2006em is most similar to the subluminous supernova 1991bg at +2.7 days with respect to maximum brightness. Adopting a recession velocity of 5766 km/s for the host galaxy (from Huchra et al. 1999, Ap.J. Suppl. 121, 287), the maximum absorption in the Si II line (rest 635.5 nm) is blueshifted by roughly 10000 km/s. SN 2006eq is similar to both the 1991T-like supernova 1999cl at +1.4 days with respect to maximum brightness and to the normal supernova 1996X at +6.9 days, at an approximate redshift of 15000 km/s (z = 0.05), consistent with that of the nearby putative host galaxy mentioned in CBET 611. This latter classification confirms the Ia typing suggested by Bassett et al. (cf. CBET 611), which was based on photometry alone.