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The IRAC Ultra Deep Fields 2010
(2010)Spitzer ProposalRecent extremely-deep, near-IR imaging (to 29.3 mag 5sigma) with HST WFC3/IR in the HUDF from our 192 orbit HUDF09 program have enabled a huge leap in our knowledge of the galaxies populating the early universe at z>7. These early galaxies are compelling targets for many reasons: as beacons of the first sites of star formation, as testbeds to constrain galaxy formation models, and as probes of reionization. Existing deep IRAC observations ...Other Publication