The 2001 April Burst Activation of SGR 1900+14: Pulse Properties and Torque

@article{Woods2003The2A,
  title={The 2001 April Burst Activation of SGR 1900+14: Pulse Properties and Torque},
  author={Paul M. Woods and Chryssa Kouveliotou and Ersin Goğuş and Mark H. Finger and Marco Feroci and Sandro Mereghetti and Jean Hebb Swank and Kevin Hurley and John Heise and D. Smith and Filippo Frontera and C. Guidorzi and C. Thompson Usra and Nsstc and NASA-MSFC and CNRRome and CNRMilano and NasaGsfc and Ucb and Sron and Univ. of Mich. and CNRBologna and Universit̀a di Ferrara and Cita},
  journal={The Astrophysical Journal},
  year={2003},
  volume={596},
  pages={464-469}
}
We report on observations of SGR 1900+14 made with the Rossi X-Ray Timing Explorer (RXTE) and BeppoSAX during the 2001 April burst activation of the source. Using these data, we measure the spin-down torque on the star and confirm earlier findings that the torque and burst activity are not directly correlated. We compare the X-ray pulse profile to the gamma-ray profile during the April 18 intermediate flare and show that (1) their shapes are similar and (1) the gamma-ray profile aligns closely… 

Figures from this paper

The 2001 April Burst Activation of SGR 1900+14: X-Ray Afterglow Emission
After nearly two years of quiescence, the soft gamma-ray repeater SGR 1900+14 again became burst-active on 2001 April 18, when it emitted a large flare, preceded by few weak and soft short bursts.
Discovery of a transient magnetar: XTE J1810-197
We report the discovery of a new X-ray pulsar, XTE J1810-197, that was serendipitously discovered on 2003 July 15 by the Rossi X- Ray Timing Explorer (RXTE) while observing the soft gamma repeater
Comparative study of the two large flares from SGR1900+14 with the BeppoSAX Gamma-Ray Burst Monitor
We report on spectral and temporal results of the 40-700 keV observations, obtained with the Gamma-Ray Burst Monitor (GRBM) on board BeppoSAX, of the two large flares from the Soft Gamma-ray Repeater
Five years of SGR 1900+14 observations with BeppoSAX
We present a systematic analysis of all the BeppoSAX data of the soft gamma-ray repeater SGR 1900+14: these observations allowed us to study the long term properties of the source quiescent emission.
Broadband X-Ray Spectra of Short Bursts from SGR 1900+14
We report on the X-ray spectral properties of 10 short bursts from SGR 1900+14 observed with the narrow-field instruments on board BeppoSAX in the hours following the intermediate flare of 2001 April
The Fading of Transient Anomalous X-Ray Pulsar XTE J1810-197
Three observations of the 5.54 s transient anomalous X-ray pulsar XTE J1810-197 obtained over 6 months with the Newton X-ray Multi-Mirror (XMM-Newton) mission are used to study its spectrum and
TIME-RESOLVED X-RAY SPECTRAL MODELING OF AN INTERMEDIATE BURST FROM SGR 1900+14 OBSERVED BY HETE-2 FREGATE AND WXM
We present a detailed analysis of a 3.5 s long burst from SGR 1900+14 that occurred on 2001 July 2. The 2–150 keV time-integrated energy spectrum is well described by the sum of two blackbodies whose
Temporal and spectral X-ray properties of magnetar SGR 1900+14 derived from observations with NuSTAR and XMM-Newton
X-ray observations play a crucial role in understanding the emission mechanism and relevant physical phenomena of magnetars. We report on X-ray observations made in 2016 of a young magnetar, SGR
Proper Motions and Origins of SGR 1806–20 and SGR 1900+14
We present results from high-resolution infrared observations of magnetars SGR 1806–20 and SGR 1900+14 over 5 years using laser-supported adaptive optics at the 10 m Keck Observatory. Our
Magnetars: the physics behind observations. A review.
TLDR
A comprehensive overview of magnetar research, in which the observational results are discussed in the light of the most up-to-date theoretical models and their implications address the more fundamental issue of how physics in strong magnetic fields can be constrained by the observations of these unique sources.
...
1
2
...

References

SHOWING 1-10 OF 30 REFERENCES
Variable spin-down in the soft gamma repeater SGR 1900+14 and correlations with burst activity
We have analyzed Rossi X-ray Timing Explorer Proportional Counter Array observations of the pulsed emission from SGR 1900+14 during 1996 September, 1998 June-October, and early 1999. Using these
An Extended Burst Tail from SGR 1900+14 with a Thermal X‐Ray Spectrum
The soft gamma repeater SGR 1900+14 entered a new phase of activity in 2001 April initiated by the intermediate flare recorded on April 18. Ten days following this flare, we discovered an abrupt
The 2001 April Burst Activation of SGR 1900+14: X-Ray Afterglow Emission
After nearly two years of quiescence, the soft gamma-ray repeater SGR 1900+14 again became burst-active on 2001 April 18, when it emitted a large flare, preceded by few weak and soft short bursts.
Discovery of a Magnetar Associated with the Soft Gamma Repeater SGR 1900+14
The soft gamma repeater SGR 1900+14 became active again on 1998 June after a long period of quiescence; it remained at a low state of activity until 1998 August, when it emitted a series of
Evidence for a Sudden Magnetic Field Reconfiguration in Soft Gamma Repeater 1900+14
We report the detection of large flux changes in the persistent X-ray flux of soft gamma repeater (SGR) 1900+14 during its burst active episode in 1998. Most notably, we find a factor of ~700
Physical mechanisms for the variable spin-down and light curve of SGR 1900+14
TLDR
The reappearance of persistent X-ray emission from SGR 1900+14 within one day of the August 27 event provides strong evidence that the persistent emission is not powered by accretion, and is attributed to continued particle heating in the active region of that outburst.
Multiwavelength Observations of the Soft Gamma Repeater SGR 1900+14 during Its 2001 April Activation
The soft gamma repeater SGR 1900+14 became active on 2001 April 18 after about 2 years of quiescence; it had remained at a very low state of activity since the fall of 1998, when it exhibited
The Giant Flare of 1998 August 27 from SGR 1900+14. I. An Interpretive Study of BeppoSAX and Ulysses Observations
The giant flare of 1998 August 27 from SGR 1900+14 was extraordinary in many ways: it was the most intense flux of gamma rays ever detected from a source outside our solar system; it was longer than
The Quiescent Counterpart of the Soft Gamma-Ray Repeater SGR 0526–66
It is now commonly believed that soft gamma-ray repeaters (SGRs) and anomalous X-ray pulsars (AXPs) are magnetars—neutron stars powered by their magnetic fields. However, what differentiates these
A Relativistic Particle Outburst From The Soft Gamma-Ray Repeater SGR1900+14
Soft gamma-ray repeaters (SGR) are a class of high energy transients whose brief emissions are thought to arise from young and highly magnetized neutron stars. The exact cause for these outbursts and
...
1
2
3
...