The Unusually Long Duration Gamma-ray Burst GRB 000911
Abstract
Of all the well localized gamma-ray bursts, GRB 000911 has the longest duration (T_90 ~ 500 s), and ranks in the top 1% of BATSE bursts for fluence. Here, we report the discovery of the afterglow of this unique burst. In order to simultaneously fit our radio and optical observations, we are required to invoke a model involving an hard electron distribution, p ~ 1.5 and a jet-break time less than 1.5 day. A spectrum of the host galaxy taken 111 days after the burst reveals a single emission line, interpreted as [OII] at a redshift z = 1.0585, and a continuum break which we interpret as the Balmer limit at this redshift. Despite the long T_90, the afterglow of GRB 000911 is not unusual in any other way when compared to the set of afterglows studied to date. We conclude that the duration of the GRB plays little part in determining the physics of the afterglow.
Cite
@article{arxiv.astro-ph/0110315,
title = {The Unusually Long Duration Gamma-ray Burst GRB 000911},
author = {P. A. Price and E. Berger and S. R. Kulkarni and S. G. Djorgovski and D. W. Fox and A. Mahabal and K. Hurley and J. S. Bloom and D. A. Frail and T. J. Galama and F. A. Harrison and G. Morrison and D. E. Reichart and S. A. Yost and R. Sari and T. S. Axelrod and T. Cline and S. Golenetskii and E. Mazets and B. P. Schmidt and J. Trombka},
journal= {arXiv preprint arXiv:astro-ph/0110315},
year = {2009}
}
Comments
14 pages, 7 figures. Submitted to ApJ