2015/10/20 by S. A. Yost, T. M. Moore, Trinity Moore
Physics and Astronomy · #Afterglow #Astronomy #Astrophysics #Gamma-ray burst #Gamma-ray bursts and supernovae #Lorentz factor #Lorentz transformation #Nuclear Physics and Applications #Phase (matter) #Physics #Pulsars and Gravitational Waves Research #Quantum mechanics #Redshift #astro-ph.HE
paper · pdf · doi:10.1093/mnras/stv2129
published as MNRAS 454: 3567-3576 (2015) · 14 pages including 8 figures, MNRAS accepted
openalex publication_date 2015/10/20 · arxiv created 2015/10/27 · arxiv updated 2015/10/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We compared the time (or time limit) of onset for optical afterglow emission to the γ-ray variability V in 76 gamma-ray bursts with redshifts. In the subset (25 cases) with the rise evident in the data, we fit the shape of the onset peak as well and compared the rising and decaying indices to V. We did not find any evidence for any patterns between these properties and there is no statistical support for any correlations. This indicates a lack of connection between irregularities of the prompt γ-ray emission and the establishment of the afterglow phase. In the ordinary prompt internal shocks interpretation, this would indicate a lack of relationship between V and the bulk Lorentz factor of the event.