EP250304a/SN 2025fhm is presented as a member of an emerging subclass of shocked cocoon-dominated low-luminosity GRB-SNe based on spectral, photometric, and light-curve modeling comparisons to prior events.
Curvature effect in structured GRB jets
2 Pith papers cite this work. Polarity classification is still indexing.
2
Pith papers citing it
abstract
We study the influence of jet structure on the curvature effect in a GRB-lightcurve. Using a simple model of jet emissivity, we numerically calculate lightcurves for a short flash from a relativistic outflow having various profiles of the Lorentz factor and outflowing energy density (gaussian, core+power-law). We find that for "on-beam" viewing geometry, with the line of sight passing through the bright core of the outflow, the shape of the lightcurve practically does not depend on the jet structure, initially following the temporal slope 2+delta, where delta is the spectral index. When the viewing angle is larger than the core, the light curve decaying slope is shallower. We discuss the implications of our results for the Swift data.
fields
astro-ph.HE 2years
2026 2verdicts
UNVERDICTED 2representative citing papers
Numerical modeling shows GRB 230307A's late-time prompt emission break is best reproduced by a jet with uniform core of 0.0147 rad and power-law wings, unlike simpler spherical or top-hat models.
citing papers explorer
-
Probing a new subclass of llGRB-SN transients: Insights from EP250304a and its associated supernova
EP250304a/SN 2025fhm is presented as a member of an emerging subclass of shocked cocoon-dominated low-luminosity GRB-SNe based on spectral, photometric, and light-curve modeling comparisons to prior events.
-
Jet-Structure Imprint on the Curvature Tail of Gamma-Ray Burst Prompt Emission
Numerical modeling shows GRB 230307A's late-time prompt emission break is best reproduced by a jet with uniform core of 0.0147 rad and power-law wings, unlike simpler spherical or top-hat models.