SIMBAD references

Filippenko adds: "Further to CBET 691, we have discovered that our initial wavelength solution was incorrect. Consequently, we have the following updates to values originally reported in CBET 691: Adopting a recession velocity of 5800 km/s for SN 2006gs (measured from narrow emission lines), the minimum of the H-alpha P-Cyg absorption is found to be blueshifted by 5600 km/s. Adopting the recession velocity of 6386 km/s for SN 2006kf (Huchra et al. 1999, Ap.J. Suppl. 121, 287), the minimum of the Si II 635.5-nm absorption is found to be blueshifted by 13400 km/s."