Spectroscopy of GRB 021004: a structured jet ploughing through a massive stellar wind

R. L. C. Starling, R. A. M. J. Wijers, M. A. Hughes +4

We present spectra of the afterglow of GRB 021004 taken with WHT ISIS and VLT FORS1 at three epochs spanning 0.49--6.62 days after the burst. We observe strong absorption likely co…