Universal statistics of soft gamma-ray repeating (SGR) bursts

Kondratyev, V. N.; Korovina, Yu. V.

doi:10.1134/s1063779618010240

Cited by 6 publications

(2 citation statements)

References 12 publications

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“…Magnetars in X-rays often show several sub-bursts within a rotational phase (see e.g. Huppenkothen et al 2015), while the arrival of normal pulses follows Poisson statistics (Göǧüş et al 1999;Göǧüş et al 2000;Kondratyev & Korovina 2018). The counterpart in radio to what is seen as sub-bursts in Xrays, can be visible as separate bursts as was seen in the simultaneous bursts of SGR 1935+2154 (see, e.g., fig.…”

Section: Rates and Wait-timesmentioning

confidence: 96%

“…Reasons for this could either be that the source is in a binary system with a corresponding period (e.g. Gu et al 2020;Lyutikov et al 2020;Ioka & Zhang 2020;Kuerban et al 2021;Du et al 2021;Wada et al 2021), it is precessing (e.g. Levin et al 2020;Sob'yanin 2020;Zanazzi & Lai 2020;Sridhar et al 2021), or that it has a thus far unobserved slow period (Beniamini et al 2020).…”

Section: Introductionmentioning

confidence: 99%

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The FRB 20121102A November rain in 2018 observed with the Arecibo Telescope

Spitler¹,

Nimmo²,

Hewitt³

et al. 2022

Preprint

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We present 849 new bursts from FRB 20121102A detected with the 305-m Arecibo Telescope. Observations were conducted as part of our regular campaign to monitor the activity and evolution of burst properties. The 10 reported observations were carried out between 1150 and 1730 MHz and fall in the active period around November 2018. All bursts were dedispersed at the same dispersion measure and are consistent with a single value of (562.4 ± 0.1) pc cm −3 . The burst rate varies between 0 bursts and 218 ± 16 bursts per hour, the highest rate observed to date. The times between consecutive bursts show a bimodal distribution. We find that arrival times with separations > 0.1 s are best described as a Poisson process with varying rate, compared to models with additional parameters. Clustering on time-scales of 22 ms is reflecting a characteristic time-scale of the source and possibly the emission mechanism. We analyse the spectro-temporal structure of the bursts by fitting 2D Gaussians with a temporal drift to each sub-burst in the dynamic spectra. We find a linear relationship between the sub-burst's drift and its duration. At the same time the drifts are consistent with coming from the sad-trombone effect. This has not been predicted by current models. The energy distribution shows an excess of high energy bursts and is insufficiently modeled by a single power-law even within single observations. We find long-term changes in the energy distribution and the average spectrum compared to earlier and later published observations. Finally, despite the large burst rate we find no strict short-term periodicity.

show abstract

Section: Rates and Wait-timesmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

The FRB 20121102A November rain in 2018 observed with the Arecibo Telescope

Spitler¹,

Nimmo²,

Hewitt³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

The FRB 20121102A November rain in 2018 observed with the Arecibo Telescope

Jahns

Spitler

Nimmo

et al. 2022

Monthly Notices of the Royal Astronomical Society

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We present 849 new bursts from FRB 20121102A detected with the 305-m Arecibo Telescope. Observations were conducted as part of our regular campaign to monitor activity and evolution of burst properties. The 10 reported observations were carried out between 1150 and 1730MHz and fall in the active period around November 2018. All bursts were dedispersed at the same dispersion measure and are consistent with a single value of (562.4±0.1)pc cm−3. The rate varies between 0 bursts and 218(16) bursts per hour, the highest rate observed to date. The times between consecutive bursts show a bimodal distribution. We find that a Poisson process with varying rate best describes arrival times with separations >0.1 s. Clustering on timescales of 22ms reflects a characteristic timescale of the source and possibly the emission mechanism. We analyse the spectro-temporal structure of the bursts by fitting 2D Gaussians with a temporal drift to each sub-burst in the dynamic spectra. We find a linear relationship between the sub-burst’s drift and its duration. At the same time, the drifts are consistent with coming from the sad-trombone effect. This has not been predicted by current models. The energy distribution shows an excess of high energy bursts and is insufficiently modelled by a single power-law even within single observations. We find long-term changes in the energy distribution, the average spectrum, and the sad-trombone drift, compared to earlier and later published observations. Despite the large burst rate, we find no strict short-term periodicity.

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Dynamic Model of a Non-equilibrium Chemical Composition Formation in the Shell of Single Neutron Stars

Ignatovskiy

Бисноватый-Коган²

2022

Astron. Rep.

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Universal statistics of soft gamma-ray repeating (SGR) bursts

Cited by 6 publications

References 12 publications

The FRB 20121102A November rain in 2018 observed with the Arecibo Telescope

The FRB 20121102A November rain in 2018 observed with the Arecibo Telescope

The FRB 20121102A November rain in 2018 observed with the Arecibo Telescope

Dynamic Model of a Non-equilibrium Chemical Composition Formation in the Shell of Single Neutron Stars

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