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Astronomers Propose Off-Axis Jet for Puzzling Gamma-Ray Burst

Researchers link a modest initial flash and intense afterglow to the viewing angle.

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Science news editorial illustration for Sideways View May Explain Cosmic Burst’s Bright Afterglow

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260310A, by on 10, an by an . The it in , and .

that the was from of . As it , from a of . A by a is for a .

Source: University of Rome Tor Vergata via Phys.org, 2026-10-29.

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Read and understand · 1/2Which kinds of light did the team use to observe the burst?

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Visible light, X-rays and radio waves. The team used all three types of observation.

Clue: GRB 260310A, detected by NASA’s Fermi telescope on March 10, produced an unremarkable initial gamma-ray flash followed by an exceptionally bright afterglow. The international team observed it in visible light, X-rays and radio waves.

Read and understand · 2/2What is one proposed explanation for the later X-ray brightening?

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A narrow energetic centre inside a slower outer flow. Researchers suggest a structured jet with a narrow centre and slower outer flow.

Clue: Researchers propose that the jet was directed away from Earth’s line of sight. As it slowed, radiation became visible from a wider range of angles. A narrow energetic centre surrounded by a slower outer flow is one possible explanation for a later X-ray brightening.

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Explain the viewing-angle interpretation and identify one proposed feature of the jet.

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The jet may have pointed away from Earth, and its light became visible over wider angles as it slowed. One proposed structure has an energetic narrow centre surrounded by a slower outer flow.

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