1 E.J. Lentz, E.. Baron, P.. Lundqvist, D.. Branch, P.H. Hauschildt, C.. Fransson, P.. Garnavich, N.. Bastian, A.V. Filippenko, R.. Kirshner, P.M. Challis, S.S. Jha, B.. Leibundgut, R.A. McCray, E.A. Michael, N.. Panagia, M.M. Phillips, C.S.J. Pun, B.. Schmidt, G.. Sonneborn, N.B. Suntzeff, L.. Wang, and J.C. Wheeler, The Astrophysical Journal 547, (2001).