Exclusion of a luminous red giant as a companion star to the progenitor of supernova SN 2011fe. by Li, W, Bloom, J, Podsiadlowski, P, Miller, A, Cenko, S, Jha, S, Sullivan, M, Howell, D, Nugent, P, Butler, N, Ofek, E, Kasliwal, M, Richards, J, Stockton, A, Shih, H, Bildsten, L, Shara, M, Bibby, J, Filippenko, A, Ganeshalingam, M, Silverman, J, Kulkarni, SR, Law, N, Poznanski, D, Quimby, R

Constraints on the Progenitor System of the Type Ia Supernova SN 2011fe/PTF11kly by Li, W, Bloom, J, Podsiadlowski, P, Miller, A, Cenko, S, Jha, S, Sullivan, M, Howell, D, Nugent, P, Butler, N, Ofek, E, Kasliwal, M, Richards, J, Stockton, A, Shih, H, Bildsten, L, Shara, M, Bibby, J, Filippenko, A, Ganeshalingam, M, Silverman, J, Kulkarni, SR, Law, N, Poznanski, D, Quimby, R