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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Gamma-ray burst (GRB) afterglows are likely produced in the shock that isdriven as the GRB jet interacts with the external medium. Long-duration GRBsare also associated with powerful supernovae (SNe). We consider the optical andradio afterglows of long GRBs for both blasts viewed along the jet axis("on-axis" afterglows) and misaligned observes ("off-axis" afterglows).Comparing the optical emission from the afterglow with that of the accompanyingSN, using SN 1998bw as an archetype, we find that only a few percent ofafterglows viewed off-axis are brighter than the SN. For observable opticaloff-axis afterglows, the viewing angle is at most twice the half-opening angleof the GRB jet. Radio off-axis afterglows should be detected with upcomingradio surveys within a few hundred Mpc. We propose that these surveys will actas "radio triggers", and that dedicated radio facilities should follow-up thesesources. Follow-ups can unveil the presence of the radio SN remnant, ifpresent. In addition, they can probe the presence of a mildly relativisticcomponent, either associated with the GRB jet or the SN ejecta, expected inthese sources.

GRB off-axis afterglows and the emission from the accompanying supernovae