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Galaxies 2017, 5(1), 4;

Exploring the Behaviour of Long Gamma-Ray Bursts with Intrinsic Afterglow Correlations: log L200s−α>200s

Department of Physics, University of Warwick, Coventry, CV4 7AL, UK
Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey RH5 6NT, UK
Instituto de Astrofísica de Andalucía (IAA-CSIC), Glorieta de la Astronomía s/n, E-18008 Granada, Spain
Astrophysics Science Division, NASA Goddard Space Flight Center, 8800 Greenbelt Road, Greenbelt, MD 20771, USA
Istituto Astrofisica Spaziale Fisica Cosmica, Via U. La Malfa 153, Palermo 90146, Italy
Unidad Asociada Departamento de Ingeniería de Sistemas y Automática, E.T.S. de Ingenieros Industriales, Universidad de Málaga, E-29071 Málaga, Spain
Unidad Asociada Grupo Ciencias Planetarias UPV/EHU-IAA/CSIC, Departamento de Física Aplicada I, E.T.S., Ingeniería, Universidad del País Vasco UPV/EHU, E-48013 Bilbao, Spain
Ikerbasque, Basque Foundation for Science, Alameda de Urquijo 36-5, E-48008 Bilbao, Spain
Leverhulme Early Career Fellow.
Author to whom correspondence should be addressed.
Academic Editor: Emilio Elizalde
Received: 31 August 2016 / Revised: 10 December 2016 / Accepted: 22 December 2016 / Published: 10 January 2017
(This article belongs to the Special Issue Gamma-Ray Bursts: Recent Theoretical Models and Observations)
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In these proceedings, we summarise the exploration so far of the relationship between the afterglow luminosity (measured at rest frame 200s; log L 200 s ) and average afterglow decay rate (measured from rest frame 200s onwards, α > 200 s ) of long duration Gamma-ray Bursts (GRBs), first reported in the optical/UV light curves of GRB afterglows. We show that this correlation is also present in the X-ray afterglows of GRBs as observed by Swift-XRT. We explore how the parameters of the correlation observed in both the X-ray and optical/UV light curves relate to each other and the prompt emission phase and whether these correlations are consistent with predictions of the standard afterglow model. We find that the observed correlations are consistent with a common underlying physical mechanism producing GRBs and their afterglows regardless of the detailed temporal behaviour. However, a basic afterglow model has difficulty explaining all the observed correlations. This leads us to briefly discuss alternative more complex models. View Full-Text
Keywords: gamma-rays: bursts gamma-rays: bursts

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Oates, S.R.; Racusin, J.L.; De Pasquale, M.; Kocevski, D.; Page, M.J.; Castro-Tirado, A.J.; Gorosabel, J.; Smith, P.J.; Breeveld, A.A.; Kuin, P.M. Exploring the Behaviour of Long Gamma-Ray Bursts with Intrinsic Afterglow Correlations: log L200s−α>200s. Galaxies 2017, 5, 4.

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