English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Evidence has been accumulated on the existence of a thermal-like componentduring the prompt phase of GRBs. This component, often associated with the GRBjet's photosphere, is usually subdominant compared to a much strongernon-thermal one. The prompt emission of Fermi GRB 131014A provides a uniqueopportunity to study this thermal-like component. Indeed, the thermal emissionin GRB 131014A is much more intense than in other GRBs and a pure thermalepisode is observed during the initial 0.16 s. The thermal-like component coolsmonotonically during the first second while the non-thermal emission kicks off.The intensity of the non-thermal component progressively increases until beingenergetically dominant at late time. This is a perfect scenario to disentanglethe thermal component from the non-thermal one. A low-energy spectral index of+0.6 better fit the thermal component than the typical index value +1corresponding to a pure Planck function. The non-thermal component isadequately fitted with a Band function whose low and high energy power lawindices are ~-0.7 and <~-3, respectively; this is also statistically equivalentto a cutoff power law with a ~-0.7 index. This is in agreement with ourprevious results. Finally, a strong correlation is observed between thetime-resolved luminosity of the non-thermal component, L$_i^{nTh}$, and itscorresponding rest frame spectral peak energy, E$_{peak,i}^{rest,nTh}$, with aslope similar to the one reported in our previous articles. Assuming thisrelation to be universal for all GRBs we estimate a redshift of ~1.55 for GRB131014A that is a typical value for long GRBs. These observational results areconsistent with the models in which the non-thermal emission is produced wellabove the GRB jet photosphere but they may also be compatible with otherscenarios (e.g., dissipative photosphere) that are not discussed in thisarticle.

astrophysical journal/the astrophysical journal

GRB 131014A: a Laboratory to Study the Thermal-Like and Non-Thermal  Emissions in Gamma-Ray Bursts, and the new  L$_\mathrm{i}^\mathrm{nTh}$-E$_\mathrm{peak,i}^\mathrm{nTh,rest}$ relation