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Magnetar Twists: Fermi/Gamma ray Burst Monitor (GBM) detection of SGR J1550-5418
Y. Kaneko, E. Gogus, C. Kouveliotou +12
SGR J1550-5418 (previously known as AXP 1E 1547.0-5408 or PSR J1550-5418) went into three active bursting episodes in 2008 October and in 2009 January and March, emitting hundreds…
Discovery of a new Soft Gamma Repeater: SGR J0418+5729
A. J. van der Horst, V. Connaughton, C. Kouveliotou +31
On 2009 June 5, the Gamma-ray Burst Monitor (GBM) onboard the Fermi Gamma-ray Space Telescope triggered on two short, and relatively dim bursts with spectral properties similar to…
Discovery of burst oscillations in the intermittent accretion-powered millisecond pulsar HETE J1900.1-2455
Anna L. Watts, Diego Altamirano, Manuel Linares +8
We report the discovery of burst oscillations from the intermittent accretion-powered millisecond pulsar (AMP) HETE J1900.1-2455, with a frequency approximately 1 Hz below the know…
1 Hz flaring in SAX J1808.4--3658: flow instabilities near the propeller stage
A. Patruno, A. L. Watts, M. Klein-Wolt +2
We present a simultaneous periodic and aperiodic timing study of the accreting millisecond X-ray pulsar SAX J1808.4-3658. We analyze five outbursts of the source and for the first…
Constraints on Neutron Star Crusts From Oscillations in Giant Flares
Andrew W. Steiner, Anna L. Watts
We show that the fundamental seismic shear mode, observed as a quasi-periodic oscillation in giant flares emitted by highly-magnetized neutron stars, is particularly sensitive to t…
Detecting gravitational waves from accreting neutron stars
Anna L. Watts, Badri Krishnan
The gravitational waves emitted by neutron stars carry unique information about their structure and composition. Direct detection of these gravitational waves, however, is a formid…