Story perspectives

Fermi Spots First Gamma-Rays From Magnetar-Driven Supernova

5/22/2026

Summary

Story summary

NASA’s Fermi Telescope detected gamma-rays from SN 2017egm in NGC 3191, 440 million light-years away.
The emission, recorded July 5–Oct. 25 2017 (43–155 days after the May 23 discovery), was the only gamma-ray signal among superluminous supernovae.
Dr Guillem Martí-Devesa et al. attribute the signal to a spinning magnetar driving an electron-positron wind.
Published in Astronomy & Astrophysics (2026) with Fabio Acero as author, study says Cherenkov Telescope Array could detect similar events out to ~500 million light-years.

History

Historical Context

In 1752 French astronomer Nicolas Louis de Lacaille divided the ancient Argo Navis into three constellations, creating Vela, which contains the Vela supernova remnant. This long-standing focus on energetic stellar remnants has evolved into contemporary gamma-ray astronomy that traces its roots to the early study of Vela’s high-energy objects and observations.

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Story summary

NASA’s Fermi Telescope detected gamma-rays from SN 2017egm in NGC 3191, 440 million light-years away.
The emission, recorded July 5–Oct. 25 2017 (43–155 days after the May 23 discovery), was the only gamma-ray signal among superluminous supernovae.
Dr Guillem Martí-Devesa et al. attribute the signal to a spinning magnetar driving an electron-positron wind.
Published in Astronomy & Astrophysics (2026) with Fabio Acero as author, study says Cherenkov Telescope Array could detect similar events out to ~500 million light-years.

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