THE AFTERGLOW OF GRB 130427A FROM 1 TO 1016 GHz
By D. Perley, S. B. Cenko, A. Corsi, N. Tanvir, A. Levan, D. A. Kann, E. Sonbaş, K. Wiersema, W. Zheng, X. H. Zhao and 24 more. 2013
141 citations recorded by the source corpus.
We present multiwavelength observations of the afterglow of GRB 130427A, the brightest (in total fluence) gamma-ray burst (GRB) of the past 29 yr. Optical spectroscopy from Gemini-North reveals the redshift of the GRB to be z = 0.340, indicating that its unprecedented brightness is primarily the result of its relatively close proximity to Earth; the intrinsic luminosities of both the GRB and its afterglow are not extreme in comparison to other bright GRBs. We present a large suite of multiwavelength observations spanning from 300 s to 130 days after the burst and demonstrate that the afterglow shows relatively simple, smooth evolution at all frequencies, with no significant late-time flaring or rebrightening activity. The entire data set from 1 GHz to 10 GeV can be modeled as synchrotron emission from a combination of reverse and forward shocks in good agreement with the standard afterglow model, providing strong support to the applicability of the underlying theory and clarifying the nature of the GeV emission observed to last for minutes to hours following other very bright GRBs. A tenuous, wind-stratified circumburst density profile is required by the observations, suggesting a massive-star progenitor with a low mass-loss rate, perhaps due to low metallicity. GRBs similar in nature to GRB 130427A, inhabiting low-density media and exhibiting strong reverse shocks, are probably not uncommon but may have been difficult to recognize in the past owing to their relatively faint late-time radio emission; more such events should be found in abundance by the new generation of sensitive radio and millimeter instruments.
Subfields: Astronomy and Astrophysics
View Paper: https://www.semanticscholar.org/paper/53ba9734dbaca00f934ea48be3682749ed4e8a03
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Citations in the corpus
- GRB hosts through cosmic time - VLT/X-Shooter emission-line spectroscopy of 96 γ-ray-burst-selected galaxies at 0.1 (2015, background): “GRB 130427A (z = 0.340) is one of the brightest GRBs of all time due to its low redshift and is extremely well studied from the radio to GeV energies (e.g., Perley et al. 2014; Ackermann et al. 2014; van der Horst et al. 2014).”
- The physics of gamma-ray bursts & relativistic jets (2014, background): “So far no burst, with the exception of GRB 130427A [475], has been simultaneously detected from optical all the way to GeV during the prompt phase.”