GCN Circular 4701
J. X. Prochaska (UC Santa Cruz), D. S. Wong, S. H. Park, A. V. Filippenko, R. J. Foley, and W. Li (UC Berkeley) report: "We observed the afterglow of GRB 060206 with the Kast double spectrograph on the Shane 3-m reflector at Lick Observatory for 6000 s starting at UT 10:11 on 6 Feb., under poor observing conditions. We confirm the report from Fynbo et al. (GCN 4692) of strong metal-line features and a damped Lya profile centered at z = 4.048 +/- 0.001. The absence of a Lya forest redward of 6200 Ang marks this absorption system as the ISM of the host galaxy of GRB 060206. A Voigt profile analysis of the Lya profile gives log N(HI) = 20.90 +/- 0.15. The absence of a strong feature at SII 1253 places an upper limit to the metallicity of [S/H] < -0.9, while the detection of Fe II 1608 implies [Fe/H] > -1.7 dex. Finally, the rest EW of Si II 1526 (1.1 Ang) implies a velocity width for the low-ionization species greater than 200 km/s. This GCN may be cited.