Very high column density and small reddening toward GRB 020124 at z=3.20

J. Hjorth, Per Møller, J. Gorosabel, J.P.U. Fynbo, Søren Toft, A.O. Jaunsen, A.A. Kaas, T. Pursimo, K. Torii, T. Kato, H. Yamaoka, A. Yoshida, Bente Thomsen, M.I. Andersen, I. Burud, J.M.C. Ceron, A.J. Castro-Tirado, A.S. Fruchter, L. Kaper, C. KouveliotouN. Masetti, E. Palazzi, Henrik Pedersen, E. Pian, J. Rhoads, E. Rol, N.R. Tanvir, P.M. Vreeswijk, R.A.M.J. Wijers, E.P.J. van den Heuvel

Research output: Contribution to journalJournal articleResearchpeer-review


We present optical and near-infrared observations of the dim afterglow of GRB 020124, obtained between 2 and 68 hr after the gamma-ray burst. The burst occurred in a very faint (Rgreater than or similar to29.5) damped Lyalpha absorber (DLA) at a redshift of z=3.198+/-0.004. The derived column density of neutral hydrogen is log(N-Hi)=21.7+/-0.2, and the rest-frame reddening is constrained to be E(B-V)
Original languageEnglish
JournalAstrophysical Journal
Issue number2
Pages (from-to)699-705
Publication statusPublished - 2003


  • gamma rays : bursts
  • galaxies : ISM
  • cosmology : observations
  • dust, extinction
  • galaxies : abundances


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