Original title: The Crab Nebula progenitor: recovering the 1054 AD supernova event as galactic Gamma-ray burst
Costantino Sigismondi, Remo Ruffini · September 2026
In 1054 AD, a bright star appeared during the day in the constellation Taurus for three weeks, recorded from Europe to China/Japan. For about sixty years, scientists have classified this event as a galactic supernova that left behind the Crab Nebula. However, researchers now propose a different explanation using the binary-driven hypernovaA model where a supernova explosion is triggered by a companion star dumping material onto a neutron star. framework, which explains energetic cosmic blasts called Gamma-ray bursts. In these bursts, light fades away in an exponential decayA pattern where the brightness drops by a fixed fraction over equal time intervals. across gamma-ray, X-ray, optical, and radio wavelengths. The researchers found that extending this universal fade-out curve to 1000 years after the explosion matches the actual radiation we detect from the Crab Nebula today across those same wavelengths. Furthermore, historical daytime visibility and simultaneous radiation plagues in Constantinople and Cairo provide strong evidence that atmospheric gamma rays arrived from this source. This disaster truly fits its literal meaning: a bad star.
You are watching a campfire. It burns brightly for a few hours, then fades to embers that glow for days. Now suppose that campfire was so intense that its heat caused illness in people far away, and its embers continued to glow for a thousand years. In this paper, the campfire is a gamma-ray burst, the illness corresponds to the radiation plagues reported in Constantinople and Cairo, and the long-lasting embers are the Crab Nebula's emissions still detected today.
This work reinterprets a well-known historical supernova as a gamma-ray burst, connecting astronomy with medieval history. It suggests that gamma-rays from the burst reached Earth's lower atmosphere, possibly causing the radiation plagues reported in Constantinople and Cairo. Understanding this event helps scientists study how nearby cosmic explosions can affect our planet.
The evidence is circumstantial, relying on historical accounts that may be interpreted differently. The exponential decay model extrapolation over 1000 years may have uncertainties. The association with plagues is correlational. The paper does not provide new observational data but reinterprets existing data.
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The Crab Nebula progenitor: recovering the 1054 AD supernova event as galactic Gamma-ray burst — Costantino Sigismondi, Remo Ruffini
Abstract licence: CC0
Explanation generated by Synthesis from the abstract — it is not the original paper. This is a preprint, so it hasn't necessarily been peer reviewed.