@article{77c2711f27df4ecfa6e990b776288dc7,
title = "GRB 010921: Discovery of the first high energy transient explorer afterglow",
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.",
author = "Price, \{P. A.\} and Kulkarni, \{S. R.\} and E. Berger and Djorgovski, \{S. G.\} and Frail, \{D. A.\} and A. Mahabal and Fox, \{D. W.\} and Harrison, \{F. A.\} and Bloom, \{J. S.\} and Yost, \{S. A.\} and Reichart, \{D. E.\} and Henden, \{A. A.\} and Ricker, \{G. R.\} and \{Van Der Spek\}, R. and K. Hurley and Atteia, \{J. L.\} and N. Kawai and E. Fenimore and C. Graziani",
note = "Funding Information: We thank Martha Haynes for the generous donation of her Hale 200 inch time without which the discovery of this afterglow would not have been possible. We thank Rick Burrus for his help with 200 inch observations. P. A. P. gratefully acknowledges an Alex Rodgers Travelling Scholarship. D. A. F. thanks Caltech for their hospitality during his sabbatical leave. S. R. K. and S. G. D. thank NSF for support of our ground-based GRB observing program. J. S. B. acknowledges support from the Hertz Foundation in the form of a fellowship. K. H. is grateful for Ulysses support under contract JPL 958059 and for HETE support under contract MIT-SC-R-293291. Funding Information: 12IRAF is distributed by the National Optical Astronomy Observatories. 13 The DSSs were produced at the Space Telescope Science Institute under US Government grant NAGW-2166. 14 The National Radio Astronomy Observatory (NRAO) is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. NRAO operates the VLA.",
year = "2002",
month = jun,
day = "1",
doi = "10.1086/341332",
language = "English (US)",
volume = "571",
pages = "L121--L125",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "American Astronomical Society",
number = "2 II",
}