SIMBAD references

S. Blondin, M. Modjaz, R. Kirshner, and P. Challis, Harvard-Smithsonian Center for Astrophysics, report that a spectrum (range 350-740 nm) of 2006hb (cf. CBET 649), obtained on Sept. 28.54 UT by M. Calkins with the F. L. Whipple Observatory 1.5-m telescope (+ FAST), shows it to be a type-Ia supernova around maximum light. Cross-correlation with a library of supernova spectra shows that 2006hb is very similar to the subluminous supernova 1999by at -3 days from maximum light. Given the estimated magnitude of the event (cf. CBET 649), and assuming no peculiar motion, the absolute visual magnitude is roughly -18.4, thereby confirming the subluminous nature of this event. Adopting a recession velocity of 4584 km/s for the host galaxy (from de Vaucouleurs et al. 1991, Third Ref. Cat. of Bright Galaxies), the maximum absorption in the Si II line (rest 635.5 nm) is blueshifted by roughly 11000 km/s.