GRB 010921: Discovery of the First High Energy Transient Explorer Afterglow

Details GRB 010921: Discovery of the First High Energy Transient Explorer Afterglow GRB 010921: Discovery of the First High Energy Transient Explorer Afterglow

Jun 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002apj...571l.121p&link_type=abstract

The Astrophysical Journal, Volume 571, Issue 2, pp. L121-L125.

Astronomy and Astrophysics

Astronomy

31

Gamma Rays: Bursts

Scientific paper

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.

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