• Corpus ID: 117795144

New Methods for Timing Analysis of Transient Events, Applied to Fermi/GBM Magnetar Bursts

  title={New Methods for Timing Analysis of Transient Events, Applied to Fermi/GBM Magnetar Bursts},
  author={Daniela Huppenkothen and Anna L. Watts and Phil Uttley and A. van der Horst and Michiel van der Klis and Chryssa Kouveliotou and Ersin Gogus and Jonathan Granot and Simon Vaughan and Mark H. Finger},
  journal={arXiv: High Energy Astrophysical Phenomena},
In order to discern the physical nature of many gamma-ray sources in the sky, we must look not only in spectral and spatial dimensions, but also understand their temporal variability. However, timing analysis of sources with a highly transient nature, such as magnetar bursts, is difficult: standard Fourier techniques developed for long-term variability generally observed, for example, from AGN often do not apply. Here, we present newly developed timing methods applicable to transient events of… 

Figures from this paper



Statistical Properties of SGR 1806–20 Bursts

The hypothesis that the energy source for soft gamma repeater bursts is crustquakes due to the evolving, strong magnetic field of the neutron star, rather than any accretion or nuclear power is supported.

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


We have discovered rapid Quasi Periodic Oscillations (QPOs) in RXTE/PCA measurements of the pulsating tail of the 27th December 2004 giant flare of SGR 1806–20. QPOs at ∼92.5 Hz are detected in a 50

A giant , periodic flare from the soft gamma repeater SGR 1900 + 14

Soft gamma repeaters are high-energy transient sources associated with neutron stars in young supernova remnants 1. They emit sporadic, short (∼ 0.1 s) bursts with soft energy spectra during periods

Gamma-Ray Observations of a Giant Flare From the Magnetar Sgr 1806-20

Magnetars comprise two classes of rotating neutron stars (Soft Gamma Repeaters (SGRs) and Anomalous X-ray Pulsars), whose X-ray emission is powered by an ultrastrong magnetic field, B {approx} 10{sup

Statistical Properties of SGR 1900+14 Bursts.

The analysis lends support to the hypothesis that the energy source for SGR bursts is internal to the neutron star and plausibly magnetic, and gives evidence for self-organized criticality in SGRs.

Global Seismic Oscillations in Soft Gamma Repeaters

There is evidence that soft gamma repeaters (SGRs) are neutron stars that experience frequent starquakes, possibly driven by an evolving, ultrastrong magnetic field. The empirical power-law

Search for millisecond periodicities in type I X-ray bursts of the Rapid Burster

We have searched the rising portion of type I X-ray bursts observed from the Rapid Burster with the Rossi X-ray Timing Explorer for the presence of periodicities. The 95per cent confidence upper

The 2004 Hyperflare from SGR 1806–20: Further Evidence for Global Torsional Vibrations

We report an analysis of archival RXTE data from the 2004 December hyperflare from SGR 1806-20. In addition to the ≈90 Hz QPO first discovered by Israel et al., we report the detection of higher