A Unified Model for GRB Prompt Emission from Optical to $\gamma$-Rays: Exploring GRBs as Standard Candles
Abstract
The origin of prompt emission from gamma ray bursts remains to be an open question. Correlated prompt optical and gamma-ray emission observed in a handful of GRBs strongly suggests a common emission region, but failure to adequately fit the broadband GRB spectrum prompted the hypothesis of different emission mechanisms for the low- and high-energy radiations. We demonstrate that our multi-component model for GRB gamma-ray prompt emission provides an excellent fit to GRB 110205A from optical to gamma-ray energies. Our results show that the optical and highest gamma-ray emissions have the same spatial and spectral origin, which is different from the bulk of the X- and softest gamma-ray radiation. Finally, our accurate redshift estimate for GRB 110205A demonstrates promise for using GRBs as cosmological standard candles.
Keywords
Cite
@article{arxiv.1606.07193,
title = {A Unified Model for GRB Prompt Emission from Optical to $\gamma$-Rays: Exploring GRBs as Standard Candles},
author = {S. Guiriec and C. Kouveliotou and D. H. Hartmann and J. Granot and K. Asano and P. Meszaros and R. Gill and N. Gehrels and J. McEnery},
journal= {arXiv preprint arXiv:1606.07193},
year = {2016}
}
Comments
6 pages of article (4 figures and 1 table). Accepted for publication in ApJ Letters on 2016 August 31 and published on 2016 October 27