Broad-lined Type Ic supernovae are powered by magnetar engines, showing a universal ejecta-mass versus initial-spin correlation across stripped-envelope supernova types that supports a common progenitor framework.
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Off-axis cocoon emission from long GRB jets produces fast X-ray transients with luminosities of 10^47-48 erg/s, durations of 10-100 s, and soft quasi-thermal spectra peaking near 0.8 keV.
SN2025ulz is a type IIb supernova whose shock-cooling tail mimicked a kilonova, demonstrating a key contaminant for gravitational-wave counterpart searches.
citing papers explorer
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Magnetar Engines in Broad-lined Type Ic Supernovae and a Unified Picture for Magnetar-powered Stripped-envelope Supernovae
Broad-lined Type Ic supernovae are powered by magnetar engines, showing a universal ejecta-mass versus initial-spin correlation across stripped-envelope supernova types that supports a common progenitor framework.
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Fast X-ray Transients produced by Off-axis Jet-Cocoons from Long Gamma-Ray Bursts
Off-axis cocoon emission from long GRB jets produces fast X-ray transients with luminosities of 10^47-48 erg/s, durations of 10-100 s, and soft quasi-thermal spectra peaking near 0.8 keV.
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ENGRAVE follow-up of a type IIb supernova spatially coincident with the sub-threshold gravitational wave trigger S250818k
SN2025ulz is a type IIb supernova whose shock-cooling tail mimicked a kilonova, demonstrating a key contaminant for gravitational-wave counterpart searches.