Searching for TeV Gamma-Ray Emission from SGR 1935+2154 during Its 2020 X-Ray and Radio Bursting Phase
H.E.S.S. · 2021 · Astrophys.J. 919 106
Magnetar and fast radio burst · 27–28 April 2020
SGR J1935+2154
A millisecond radio burst from the Galactic magnetar SGR J1935+2154, coinciding with an X-ray burst, gave the first direct link between fast radio bursts and magnetars.
Our part
H.E.S.S. observed the magnetar during its burst storm through its follow-up programme for soft gamma repeaters. Fabian co-wrote the H.E.S.S. Source of the Month on these observations; the results were published in ApJ in 2021.
Follow-up, step by step
- 27 April, 18:26 UTSwift-BAT
The first of two alerts six minutes apart; a "forest of bursts" lasting about seven hours follows.
- 28 April, 01:55 UTH.E.S.S.
Two hours of observations start, about an hour after the burst forest ended.
- 28 April 2020CHIME and STARE2
Detect a millisecond radio burst from the magnetar, lining up with an X-ray burst seen by INTEGRAL and Insight-HXMT.
- Shortly afterFAST
Detects a second radio burst.
- 2021Publications
H.E.S.S. results published in The Astrophysical Journal.
Papers
Observation of burst activity from SGR1935+2154 associated to first galactic FRB with H.E.S.S.
H.E.S.S. · 2021 · PoS ICRC2021 777
From the news
The story as it happened.
SGR J1935+2154: An active magnetar now linked to repeating fast radio bursts. A new opportunity for H.E.S.S.
A radio burst from the Galactic magnetar SGR J1935+2154 strengthened the connection between magnetars and fast radio bursts and triggered H.E.S.S. observations.
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