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arxiv: 0904.2383 · v1 · submitted 2009-04-15 · 🌌 astro-ph.HE

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Discovery of burst oscillations in the intermittent accretion-powered millisecond pulsar HETE J1900.1-2455

Anna L. Watts , Diego Altamirano , Manuel Linares , Alessandro Patruno , Piergiorgio Casella , Yuri Cavecchi , Nathalie Degenaar , Nanda Rea
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Paolo Soleri Michiel van der Klis Rudy Wijnands (University of Amsterdam)
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classification 🌌 astro-ph.HE
keywords burstintermittentaccretion-powereddiscoveryfrequencyhetej1900millisecond
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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.

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