Absorption systems in the spectrum of GRB 021004

P. Moller, J. Fynbo, J. Hjorth, B. Thomsen, M.P. Egholm, M.I. Andersen, J. Gorosabel, S.T. Holland, P. Jakobsson, B.L. Jensen, H. Pedersen, K. Pedersen, M. Weidinger

    Research output: Contribution to journalArticlepeer-review

    72 Citations (Scopus)
    28 Downloads (Pure)


    We report on a 3600 s spectrum of GRB 021004 obtained with the Nordic Optical Telecope on La Palma 10.71 hours after the burst. We identify absorption lines from five systems at redshifts 1.3806, 1.6039, 2.2983, 2.3230, and 2.3292. In addition we find an emission line which, if due to Ly from the host galaxy, gives a redshift of 2.3351. The nearest absorber is blueshifted by 530 km s−1 with respect to this line, consistent with shifts seen in Damped Ly and Lyman-Break galaxies at similar redshifts. The emission line flux is 2:46 0:50 10−16 erg s−1 cm−2. Some of the absorption systems are “line-locked”, an effect often seen in QSO absorption systems believed to originate close to the QSO central engine.
    Original languageEnglish
    Pages (from-to)L21-L24
    JournalAstronomy and Astrophysics
    Publication statusPublished - 2002


    Dive into the research topics of 'Absorption systems in the spectrum of GRB 021004'. Together they form a unique fingerprint.

    Cite this