EP250302a: violent shell collision in a soft-X-ray-selected GRB-like transient

arXiv:2604.14341 · astro-ph.HE · Submitted 2026-04-15 · Read on arXiv

astro-ph.HE

Submitted: 2026-04-15

Updated: 2026-09-23

Code: https://github.com/leiwh/PyFRS

Terminology

• Einstein Probe — 4× in this paper
• Calibration — 3× in this paper · explained in 7 episodes
• Amati Relation — 1× in this paper · explained in 1 episode
• Aperture — 1× in this paper · explained in 1 episode
• Aperture Photometry — 1× in this paper · explained in 1 episode
• Follow-up X-ray Telescope — 1× in this paper
• Markov Chain Monte Carlo — 1× in this paper
• Multi Unit Spectroscopic Explorer — 1× in this paper
• Widefield X-ray Telescope — 1× in this paper

Sources

• An energetic dirty fireball detected in soft X-rays
• Extreme superluminal expansion traces an ultra-narrow GRB jet across relativistic regimes
• An Intermediate-mass Black Hole Lurking in A Galactic Halo Caught Alive during Outburst

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