Constraining the energy budget of GRB 080721
MetadataShow full item record
We follow the bright, highly energetic afterglow of Swift-discovered GRB 080721 at z= 2.591 out to 36 d or 3 × 10(6) s since the trigger in the optical and X-ray bands. We do not detect a break in the late-time light curve inferring a limit on the opening angle of [graphic] and setting tight constraints on the total energy budget of the burst of Eγ≥ 9.9 × 10(51) erg within the fireball model. To obey the fireball model closure relations, the gamma-ray burst (GRB) jet must be expanding into a homogeneous surrounding medium and likely lies behind a significant column of dust. The energy constraint we derive can be used as an observational input for models of the progenitors of long GRBs: we discuss how such high collimation-corrected energies could be accommodated with certain parameters of the standard massive star core-collapse models. We can, however, most probably rule out a magnetar progenitor for this GRB which would require 100 per cent efficiency to reach the observed total energy.
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society. ©: 2009 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Showing items related by title, author, creator and subject.
Shafiullah, G.; Amanullah, M.; Shawkat Ali, A.; Jarvis, D.; Wolfs, Peter (2012)Given the recent increasing public focus on climate change issues, there is a need for robust, sustainable and climate friendly power transmission and distribution systems that are intelligent, reliable, and green. Current ...
Energy consumption modeling using artificial neural networks: The case of the world’s highest consumersAydin, G; Jang, Hyong Doo; Topal, Erkan (2016)The world’s highest energy consumer (HC) countries currently constitute around 62% of the world energy consumption. Therefore, it is highly important to model their energy consumption to obtain an estimated profile of ...
Karol, Elizabeth (2003)This thesis seeks to address energy efficient design in a temperate climate in typical small, medium density housing, particularly in housing for the aged. The connections between energy efficient design and small, medium ...