Can X-ray emission powered by a spinning-down magnetar explain some GRB light curve features?

B. Zhang; E. Troja; N. Lyons; P.T. O'Brien; R.L.C. Starling; R. Willingale

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Can X-ray emission powered by a spinning-down magnetar explain some GRB light curve features?

N. Lyons, P.T. O'Brien, B. Zhang, R. Willingale, E. Troja, R.L.C. Starling

High Energy Astrophysical Phenomena · Submitted 26 Aug 2009

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim By automatically fitting the X-ray lightcurves of all GRBs observed by the Swift satellite we identified a subset of bursts which have a feature in their light curves which we call an internal plateau -- unusually constant emission followed by a steep decay -- which may be powered by a magnetar.

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arXiv ID0908.3798 (version 1)

Pith IDIEZWNK3B, Pith's permanent record of this paper and its review

CitationB. Zhang, E. Troja, N. Lyons, P.T. O'Brien, R.L.C. Starling, R. Willingale. "Can X-ray emission powered by a spinning-down magnetar explain some GRB light curve features?." arXiv:0908.3798 (2009). https://pith.science/paper/IEZWNK3B

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The compiled record

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What the abstract itself states, as probabilities: claims first 0.05 · states limitation 0.29 · human participants 0.02 · controlled comparison 0.04 · randomized assignment 0.01 · states quantitative result 0.36 · compares with prior results 0.12 · mentions code or data availability 0.02.

The abstract, sentence by sentence

arXiv listing abstract v1. Results and the main claim are underlined; show every role.

Long duration gamma-ray bursts (GRBs) are thought to be produced by the core-collapse of a rapidly-rotating massive star. This event generates a highly relativistic jet and prompt gamma-ray and X-ray emission arises from internal shocks in the jet or magnetised outflows. If the stellar core does not immediately collapse to a black hole, it may form an unstable, highly magnetised millisecond pulsar, or magnetar. As it spins down, the magnetar would inject energy into the jet causing a distinctive bump in the GRB light curve where the emission becomes fairly constant followed by a steep decay when the magnetar collapses. We assume that the collapse of a massive star to a magnetar can launch the initial jet. By automatically fitting the X-ray lightcurves of all GRBs observed by the Swift satellite we identified a subset of bursts which have a feature in their light curves which we call an internal plateau -- unusually constant emission followed by a steep decay -- which may be powered by a magnetar. We use the duration and luminosity of this internal plateau to place limits on the magnetar spin period and magnetic field strength and find that they are consistent with the most extreme predicted values for magnetars.

background contribution method result interpretation main claim

What the classifier reports for each sentence. The number is the probability it gave the label.
#	sentence	role	the authors' own work	states the main conclusion	strength
s0	Long duration gamma-ray bursts (GRBs) are thought to be produced by the core-collapse of a rapidly-rotating massive star.	background 1.00	0.04	0.02	hedged possibility 0.83
s1	This event generates a highly relativistic jet and prompt gamma-ray and X-ray emission arises from internal shocks in the jet or magnetised outflows.	background 1.00	0.05	0.03	asserted 0.82
s2	If the stellar core does not immediately collapse to a black hole, it may form an unstable, highly magnetised millisecond pulsar, or magnetar.	background 1.00	0.04	0.03	hedged possibility 1.00
s3	As it spins down, the magnetar would inject energy into the jet causing a distinctive bump in the GRB light curve where the emission becomes fairly constant followed by a steep decay when the magnetar collapses.	background 0.79	0.08	0.17	hedged possibility 0.69
s4	We assume that the collapse of a massive star to a magnetar can launch the initial jet.	method 0.77	0.21	0.04	asserted 0.67
s5	By automatically fitting the X-ray lightcurves of all GRBs observed by the Swift satellite we identified a subset of bursts which have a feature in their light curves which we call an internal plateau -- unusually constant emission followed by a steep decay -- which may be powered by a magnetar.	contribution 0.51	0.97	0.59	hedged possibility 0.69
s6	We use the duration and luminosity of this internal plateau to place limits on the magnetar spin period and magnetic field strength and find that they are consistent with the most extreme predicted values for magnetars.	result 0.96	0.97	0.61	asserted 0.58

What kind of paper the classifier reports this is: empirical study 0.93 · evidence from analysis of existing data 1.00.

What was examined, and what was not

sources read

arXiv listing abstract v1

not examined

full text
figures and tables
references and citing sentences
relations to other papers

levels run

P abstract

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S sections
T body sentences
C citations
R cross-paper relations

Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

The paper

Original abstract

Long duration gamma-ray bursts (GRBs) are thought to be produced by the core-collapse of a rapidly-rotating massive star. This event generates a highly relativistic jet and prompt gamma-ray and X-ray emission arises from internal shocks in the jet or magnetised outflows. If the stellar core does not immediately collapse to a black hole, it may form an unstable, highly magnetised millisecond pulsar, or magnetar. As it spins down, the magnetar would inject energy into the jet causing a distinctive bump in the GRB light curve where the emission becomes fairly constant followed by a steep decay when the magnetar collapses. We assume that the collapse of a massive star to a magnetar can launch the initial jet. By automatically fitting the X-ray lightcurves of all GRBs observed by the Swift satellite we identified a subset of bursts which have a feature in their light curves which we call an internal plateau -- unusually constant emission followed by a steep decay -- which may be powered by a magnetar. We use the duration and luminosity of this internal plateau to place limits on the magnetar spin period and magnetic field strength and find that they are consistent with the most extreme predicted values for magnetars.

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References

Forward citations

Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

Ranking Prompt--Plateau Correlations in Gamma-Ray Bursts with Symbolic Regression
astro-ph.HE 2026-10 conditional novelty 5.0 of 10

The Dainotti relation between GRB plateau luminosity and duration is a projection of a tighter three-parameter plane that also includes prompt peak luminosity.
Revisiting the Multiwavelength Data of GRB 240825A: Implications for a Two-Stage Central Engine and a Dusty Environment
astro-ph.HE 2026-10 conditional novelty 5.0 of 10

The multi-wavelength data of GRB 240825A are consistent with a two-stage central engine evolving from a proto-magnetar to a black hole, and its afterglow requires time-dependent dust extinction.
A review of long lasting activities of the central engine of gamma-ray bursts
astro-ph.HE 2025-01 unverdicted novelty 1.0 of 10

A review of ultra-long gamma-ray bursts and X-ray plateau phases as evidence that the central engine keeps working long after the first flash.

How the literature uses it

9 arXiv papers cite this in 13 sentences

Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

Papers citing it · 9 sentences without a confident label

Cites it as support 3 papers

For instance, a continuous variation in the magnetar spin period, surface magnetic field, or ellipticity naturally produces a broad spectrum of plateau slopes [ref] .

Gamma-Ray Bursts: Evidence for a Common Origin of X-ray Plateaus with Diverse Temporal Decay Index · Discussion · 0.99
Dominant emission from the RS region can be invoked to explain plateaus, in particular cases where the plateau is followed by a sudden drop in flux [ref] (rather than, or prior to, a light curve steepening).

Gamma-ray burst afterglow blast waves · Persistent injection of energy · 0.97
The magnetar model can successfully fit those GRB lightcurves that present a plateau [ref] and can also account for an observed anticorrelation between plateau luminosity and duration [ref] .

Electromagnetic Counterparts of Compact Binary Mergers · Open Problems · 0.99

Cites it as background 1 paper

The exact origin of the late-time X-ray emission is unclear, though it could be potentially explained by an off-axis jet [ref] , a two-component jet [ref] , energy injection [ref] , refreshed shocks [ref] , inverse Compton (IC) scattering of optical supernova photons [ref] , or a long-lived magnetar central engine [ref] .

GRB 260310A/SN 2026fgk: Photometric and Spectroscopic Evolution of a Nearby GRB-Supernova and an Exceptionally Bright Afterglow at z=0.153 · Comparison of X-ray and OIR Behavior · 0.81

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