From Outburst to Quiescence: Monitoring the Transient X-ray Pulsar in Westerlun

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Supernovae, Supernova Remnants, Diffuse (Galactic) Emission And Isolated Neutron Stars, Cxo J164710.2-4

Scientific paper

On 2006 September 21 an intense (10^39 ergs) and short (20ms) burst was detected by Swift from the candidate Anomalous X-ray Pulsar CXOU J164710.2-455216, while a fast-response Swift observation detected a flux enhancement larger than a factor of 300 with respect to the quiescent level. Subsequent Swift, Chandra, XMM and SUZAKU follow-up observations allowed, for the first time, to monitor a magnetar outburst since the very beginning. Both the spectral and timing properties of CXOU J164710.2-455216 drastically changed on short- and long-term timescales and are still evolving after two years. The present proposal is aimed at continuing the XMM monitoring of this source and studying the evolution of the main spectral/timing parameters as it approaches its quiescent flux.

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