Article

Phillips, MM, Simon, JD, Morrell, N, Burns, CR, Cox, NLJ, Foley, RJ, Karakas, AI, Patat, F, Sternberg, A, Williams, RE, Gal-Yam, A, Hsiao, EY, Leonard, DC, Persson, SE, Stritzinger, M, Thompson, IB, Campillay, A, Contreras, C, Folatelli, G, Freedman, WL et al, Hamuy, M, Roth, M, Shields, GA, Suntzeff, NB, Chomiuk, L, Ivans, II, Madore, BF, Penprase, BE, Perley, DA, Pignata, G, Preston, G and Soderberg, AM (2013) On the source of the dust extinction in type Ia supernovae and the discovery of anomalously strong Na i absorption. The Astrophysical Journal, 779 (1). ISSN 1538-4357