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U.S. Telescope Detects Gamma-Rays from Magnetar-Powered Supernova

5/26/2026

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Summary

Story summary

A U.S. telescope observed gamma-rays from SN 2017egm on May 23, 2017, 440 million light-years away in NGC 3191.
Fabio Acero of Paris-Saclay said the 2024 detection confirms a gamma-ray signal from a core-collapse supernova.
Guillem Martí-Devesa said a magnetar 1,000 times stronger than ordinary neutron stars powers the emission, with wind-nebula particles annihilating to produce the gamma-rays.

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Story summary

A U.S. telescope observed gamma-rays from SN 2017egm on May 23, 2017, 440 million light-years away in NGC 3191.
Fabio Acero of Paris-Saclay said the 2024 detection confirms a gamma-ray signal from a core-collapse supernova.
Guillem Martí-Devesa said a magnetar 1,000 times stronger than ordinary neutron stars powers the emission, with wind-nebula particles annihilating to produce the gamma-rays.