SIMBAD references

Blondin et al. add that a spectrum (range 350-740 nm) of 2007hv (cf. CBET 1056), obtained as above on Sept. 11.45 by Berlind, shows it to be a type-II supernova roughly 1-2 weeks past explosion. The spectrum is similar to that of the type-II-plateau supernova 1999em (cf. IAUC 7294, 7296) at 9 days past explosion. Adopting a recession velocity of 5054 km/s for the host galaxy (from de Vaucouleurs et al. 1991, Third Ref. Cat. of Bright Galaxies), the maximum absorption in the H_alpha line (rest 656.3 nm) is blueshifted by roughly 12000 km/s.