Berger, EdoChary, RCowie, L LPrice, Paul AntonySchmidt, BrianFox, Derek BCenko, Stephen BDjorgovski, S GSoderberg, A MKulkarni, Shrinivas RMcCarthy, P JGladders, M DPeterson, BruceBarger, A. J.2015-12-070004-637Xhttp://hdl.handle.net/1885/21076We present deep Hubble Space Telescope (HST) and Spitzer Space Telescope observations of GRB 050904 at z = 6.295. We detect the afterglow in the H band more than 3 weeks after the burst and confirm the presence of a jet break at t ≈ 2.1 days. This leadsE. B. acknowledges support by NASA through Hubble Fellowship grant HST- 01171.01 awarded by the Space Telescope Science Institute (STScI), which is operated by AURA, Inc., for NASA under contract NAS5-26555. Additional support was provided by NASA through grant HST-GO-10616 from STScI and through a Spitzer award from JPL/Caltech.© 2007. The American Astronomical Society.Keywords: Cosmology: observations; Galaxies: abundances; Galaxies: high-redshift; Galaxies: starburst; Gamma rays: bursts200710.1086/5195112015-12-07