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 Tools annual

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 monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

GRB 110721A was detected by the Gamma-ray Burst Monitor and the Large AreaTelescope (LAT) onboard the Fermi satellite and the Gamma-ray Burst Polarimeteronboard the IKAROS solar mission. Previous analysis done of this burst showed:i) a linear polarization signal with position angle stable ($\phi_p=160^\circ\pm11$) and high degree of $\Pi=84^{+16}_{-28}$, ii) an extreme peakenergy of a record-breaking at 15$\pm$2 MeV, and iii) a subdominant promptthermal component observed right after the onset of this burst. In this paper,the LAT data around the reported position of GRB 110721A are analysed with themost recent software and then, the LAT light curve above 100 MeV was obtained.The LAT light curve is modelled in terms of adiabatic early-afterglow externalshocks when the outflow propagates into a stellar wind. Additionally, wediscuss the possible origins and also study the implications of theearly-afterglow external shocks on the extreme peak energy observed at 15$\pm$2MeV, the polarization observations and the subdominant prompt thermalcomponent.

Modeling the high-energy emission in GRB 110721A and implications on the early multiwavelength and polarimetric observations