Keywords :
dust, extinction - gamma-ray burst general - gamma-ray burst: individual: 071025
Abstract:We present observations and analysis of the broad-band afterglow of Swift GRB 071025. Using optical and infrared (RIYJHK) photometry, we derive a photometric redshift of 4.4<z<5.2; at this redshift our simultaneous multicolour observations begin at ~30s after the gamma-ray burst trigger in the host frame, during the initial rising phase of the afterglow.
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