Discovery of burst oscillations in the intermittent accretion-powered millisecond pulsar HETE J1900.1-2455
arXiv:0904.2383 · doi:10.1088/0004-637X/698/2/L174
Abstract
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 known spin frequency. The burst oscillation properties are far more similar to those of the non-AMPs and Aql X-1 (an intermittent AMP with a far lower duty cycle), than those of the AMPs SAX J1808.4-3658 and XTE J1814-338. We discuss the implications for models of the burst oscillation and intermittency mechanisms.
4 pages, 4 figures, submitted to ApJ Letters