Discovery of burst oscillations near the spin frequency in the intermittent accreting millisecond pulsar HETE J1900.1-2455

Authors
Publication date 2009
Journal The astronomer's telegram
Volume | Issue number 2004
Organisations
  • Faculty of Science (FNWI) - Anton Pannekoek Institute for Astronomy (API)
Abstract RXTE observations of the intermittent accreting millisecond X-ray pulsar HETE J1900.1-2455 (Kaaret et al. 2006 ApJ 638, 963; Galloway et al. 2007 ApJ 654, L73) showed a Type I X-ray burst on April 2 2009 (08:57 UTC). We detect strong burst oscillations during the peak and initial decay of the burst, drifting upwards from 375.5 Hz to 376.5 Hz. Maximum Leahy power is in the range 25-45 in 4 independent consecutive 2s bins (using all photons in the 2-60 keV band), putting the detection beyond doubt.
Document type Article
Note Discovery of burst oscillations near the spin frequency in the intermittent accreting millisecond pulsar HETE J1900.1-2455
Language English
Published at http://www.astronomerstelegram.org/?read=2004
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