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Published online by Cambridge University Press: 17 May 2006
Recent spectroscopic observation of $z=6.3$ GRB 050904 is reported with an emphasis on the importance of making similar prompt spectroscopy for long burst GRB events yet to come. A preliminary result of a survey for $z\sim7.0$ Lyman $\alpha$ emitters (LAEs) using a narrow band filter NBF973 is also presented.