GRB 010921: Discovery of the first high energy transient explorer afterglow

P. A. Price*, S. R. Kulkarni, E. Berger, S. G. Djorgovski, D. A. Frail, A. Mahabal, D. W. Fox, F. A. Harrison, J. S. Bloom, S. A. Yost, D. E. Reichart, A. A. Henden, G. R. Ricker, R. Van Der Spek, K. Hurley, J. L. Atteia, N. Kawai, E. Fenimore, C. Graziani

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    34 Citations (Scopus)

    Abstract

    We report the discovery of the optical and radio afterglow of GRB 010921, the first gamma-ray burst afterglow to be found from a localization by the High Energy Transient Explorer satellite. We present optical spectroscopy of the host galaxy, which we find to be a dusty and apparently normal star-forming galaxy at z = 0.451. The unusually steep optical spectral slope of the afterglow can be explained by heavy extinction, Av > 0.5 mag, along the line of sight to the GRB. Dust with similar Av for the host galaxy as a whole appears to be required by the measurement of a Balmer decrement in the spectrum of the host galaxy.

    Original languageEnglish
    Pages (from-to)L121-L125
    JournalAstrophysical Journal
    Volume571
    Issue number2 II
    DOIs
    Publication statusPublished - 1 Jun 2002

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