Shock breakout from mildly relativistic ejecta in a dense wind: the case of EP260321a/SN 2026gzf

arXiv:2607.24045 · astro-ph.HE · Submitted 2026-07-27 · Read on arXiv

astro-ph.HE

Submitted: 2026-07-27

Updated: 2026-10-07

Comments: 14 pages, 3 figures, submitted

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Core — 7× in this paper · explained in 2 episodes
• Follow-up X-ray Telescope — 1× in this paper
• Observational Selection Effects — 1× in this paper · explained in 2 episodes

Sources

• Decadal pre-explosion activity and circumstellar interaction in a supernova
• Science with the Ultraviolet Explorer (UVEX)
• Failed jet breakout in the metal-poor broad-lined type Ic supernova 2026gzf
• EP260321a/SN 2026gzf: The Faintest Shock Breakout Associated with a Broad-Lined Supernova
• A Multi-Wavelength View of the First Type Ic-BL Supernova with an Einstein Probe X-ray Shock Breakout
• Pinning Down the Geometry of the Type Ic Broad-Line Supernova 2026gzf
• Mildly relativistic X-ray transient 080109 and SN2008D: Towards a continuum from energetic GRB/XRF to ordinary Ibc SN
• X-rays breaking out of pre-explosion ejecta mark a supernova's first light

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