No Evidence for Variability of Intervening Absorption Lines toward GRB 060206: Implications for the Mg II Incidence Problem

Kentaro Aoki, Tomonori Totani, Takashi Hattori +6

We examine variability of absorption line strength of intervening systems along the line of sight to GRB 060206 at $z=4.05$, by the low-resolution optical spectra obtained by the…