1. Exploring the canonical behaviour of long gamma-ray bursts with an intrinsic multiwavelength afterglow correlation
- Author
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N. P. M. Kuin, S. R. Oates, A. A. Breeveld, J. Gorosabel, Philip J. Smith, M. J. Page, J. L. Racusin, A. J. Castro-Tirado, D. Kocevski, and M. de Pasquale
- Subjects
Physics ,Correlation ,Astrophysics::High Energy Astrophysical Phenomena ,Monte Carlo method ,Phase (waves) ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics ,Light curve ,Gamma-ray burst ,Short duration ,Luminosity ,Afterglow - Abstract
In this conference proceeding we examine a correlation between the afterglow luminosity (measured at restframe 200 s; $\rm log\;L_{200\rm{s}}$) and average afterglow decay rate (measured from restframe 200 s onwards; $\alpha_{>200\rm{s}}$) found in both the optical/UV and X-ray afterglows of long duration Gamma-ray Bursts (GRBs). Examining the X-ray light curves, we find the correlation does not depend on the presence of specific light curve features. We explore how the parameters in the optical/UV and X-ray bands relate to each other and to the prompt emission phase. We also use a Monte Carlo simulation to explore whether these relationships are consistent with predictions of the standard afterglow model. We conclude that the correlations are consistent with a common underlying physical mechanism producing GRBs and their afterglows regardless of their detailed temporal behaviour. However, a basic afterglow model has difficulty explaining correlations involving $\alpha_{>200\rm{s}}$. We therefore briefly discuss alternative more complex models.
- Published
- 2020