Hubble space telescope observations of the afterglow, supernova, and host galaxy associated with the extremely bright GRB 130427A

A. J. Levan, N. R. Tanvir, A. S. Fruchter, J. Hjorth, E. Pian, P. Mazzali, R. A. Hounsell, D. A. Perley, Z. Cano, J. Graham, S. B. Cenko, J. P.U. Fynbo, C. Kouveliotou, A. Pe'Er, K. Misra, K. Wiersema