SIMBAD references

S. Blondin, M. Modjaz, R. Kirshner, and P. Challis, Harvard-Smithsonian Center for Astrophysics, and T. Matheson, National Optical Astronomy Observatory, report that a spectrum (range 350-740 nm) of SN 2006at (cf. IAUC 8687), obtained on Mar. 23.38 UT by W. Peters with the F. L. Whipple Observatory 1.5-m telescope (+ FAST), shows this object to be a type-II supernova. The spectrum consists of a blue continuum and P-Cyg profiles of the Balmer series and other lines (see http://cfa-www.harvard.edu/oir/Research/supernova/spectra/sn2006at-20060323.flm. No nebular lines from the supernova's host galaxy were detected in the supernova spectrum. However, cross correlation with a library of type-II-supernova spectra indicates that SN 2006at is at an approximate redshift of z = 0.015 (cz = 4500 km/s). Adopting this value for the recession velocity of the supernova, the maximum absorption in the H_beta line (rest 486.1 nm) is blueshifted by 7000 km/s.