Spectroscopic observations and analysis of the peculiar SN 1999aa by Garavini, G, Folatelli, G, Goobar, A, Nobili, S, Aldering, G, Amadon, A, Amanullah, R, Astier, P, Balland, C, Blanc, G, Burns, MS, Conley, A, Dahlen, T, Deustua, SE, Ellis, R, Fabbro, S, Fan, X, Frye, B, Gates, E, Gibbons, R, Goldhaber, G, Goldman, B, Groom, D, Haissinski, J, Hardin, D

Spectroscopic observations and analysis of the unusual type Ia SN 1999ac by Garavini, G, Aldering, G, Amadon, A, Amanullah, R, Astier, P, Balland, C, Blanc, G, Conley, A, Dahlen, T, Deustua, SE, Ellis, R, Fabbro, S, Fadeyev, V, Fan, X, Folatelli, G, Frye, B, Gates, E, Gibbons, R, Goldhaber, G, Goldman, B, Goobar, A, Groom, D, Haissinski, J, Hardin, D, Hook, I

IMPROVED COSMOLOGICAL CONSTRAINTS FROM NEW, OLD, AND COMBINED SUPERNOVA DATA SETS by Kowalski, M, Rubin, D, Aldering, G, Agostinho, R, Amadon, A, Amanullah, R, Balland, C, Barbary, K, Blanc, G, Challis, P, Conley, A, Connolly, N, Covarrubias, R, Dawson, K, Deustua, SE, Ellis, R, Fabbro, S, Fadeyev, V, Fan, X, Farris, B, Folatelli, G, Frye, B, Garavini, G, Gates, E, Germany, L