Discovery of the Accretion-powered Millisecond X-ray Pulsar Igr J 00291 + 5934

@inproceedings{Galloway2005DiscoveryOT,
  title={Discovery of the Accretion-powered Millisecond X-ray Pulsar Igr J 00291 + 5934},
  author={Duncan K. Galloway and Craig B. Markwardt and Edward H. Morgan and Deepto Chakrabarty and Tod E. Strohmayer},
  year={2005}
}
We report on observations of the sixth accretion-powered millisecond pulsar, IGR J00291+5934, with the Rossi X-Ray Timing Explorer. The source is a faint, recurrent X-ray transient initially identified by INTEGRAL. The 599 Hz (1.67 ms) pulsation had a fractional rms amplitude of 8% in the 2–20 keV range, and its shape was approximately sinusoidal. The pulses show an energy-dependent phase delay, with the 6–9 keV pulses arriving up to 85 μs earlier than those at lower energies. No X-ray bursts… CONTINUE READING