Burst Phase Distribution of SGR J1935+2154 Based on Insight-HXMT

Article Astronomy & Astrophysics

An Insight-HXMT Dedicated 33 day Observation of SGR J1935+2154. I. Burst Catalog

Ce Cai et al.

Summary: This study analyzes the long-term observations of SGR J1935+2154 and discovers a series of burst characteristics. No correlation between X-ray bursts and radio bursts, except for FRB 200428, is found.

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES (2022)

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Article Astronomy & Astrophysics

An Insight-HXMT Dedicated 33 day Observation of SGR J1935+2154. II. Burst Spectral Catalog

Ce Cai et al.

Summary: Insight-HXMT has observed the magnetar SGR J1935+2154 and found that about 15% of the bursts can be described by the CPL model, with a higher frequency of occurrence. The radiation intensity of these bursts is weaker compared to Fermi/GBM, but follows the same power-law distribution. Additionally, a burst with a similar peak energy to the X-ray burst associated with FRB 200428 has been discovered.

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES (2022)

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Article Astronomy & Astrophysics

HXMT identification of a non-thermal X-ray burst from SGR J1935+2154 and with FRB 200428

C. K. Li et al.

Summary: The study detected a non-thermal X-ray burst from SGR J1935+2154, which showed two hard peaks with a timing feature similar to the two bursts in FRB 200428, suggesting a common origin for the non-thermal X-ray burst and FRB 200428 in an explosive event from SGR J1935+2154.

NATURE ASTRONOMY (2021)

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Article Astronomy & Astrophysics

Broadband X-ray burst spectroscopy of the fast-radio-burst-emitting Galactic magnetar

G. Younes et al.

Summary: Twenty-four X-ray bursts from a Galactic magnetar observed simultaneously with NICER and Fermi provide a direct comparison to a later X-ray burst coincident with a fast radio burst (FRB). The FRB-related burst is spectrally distinct, suggesting an unusual point of emission. The uniqueness of the FRB-associated X-ray burst may indicate an uncommon origin locale.

NATURE ASTRONOMY (2021)

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Article Astronomy & Astrophysics

A peculiar hard X-ray counterpart of a Galactic fast radio burst

A. Ridnaia et al.

Summary: Fast radio bursts have unknown physical origins and are potentially linked to young, highly magnetized, isolated neutron stars known as magnetars. A recent hard X-ray event detected is found to be temporally coincident with a bright radio burst in the direction of the Galactic magnetar SGR 1935+2154, showing properties similar to FRBs. The rarity and hardness of the X-ray spectrum of this event compared to typical bursts from SGR 1935+2154 suggests a possible association between bright, FRB-like magnetar signals and hard X-ray bursts.

NATURE ASTRONOMY (2021)

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Article Astronomy & Astrophysics

Fermi/GBM Observations of the SGRJ1935+2154 Burst Forest

Yuki Kaneko et al.

Summary: During April and May 2020, SGR J1935+2154 emitted numerous short bursts, with one burst forest episode exhibiting thermal spectral components and high-energy maxima during photon flux peaks correlated with the spin period of the source. The emitting area of the high-energy component was significantly smaller than the low-energy component, indicating a potential origin within closed toroidal magnetic field lines at a low-altitude hotspot.

ASTROPHYSICAL JOURNAL LETTERS (2021)

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Review Physics, Multidisciplinary