Repudiation or Confirmation of an Enormous Glitch in a Magnetar

Details Repudiation or Confirmation of an Enormous Glitch in a Magnetar Repudiation or Confirmation of an Enormous Glitch in a Magnetar

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006cxo..prop.2296w&link_type=abstract

Chandra Proposal ID #08508262

Physics

Chandra Proposal Id #08508262

Scientific paper

On Sep 21, 2006, a bright X-ray burst was recorded (GCN 5581) from the newly discovered AXP CXO J1647-45. The burst was accompanied by a large flux increase, spectral hardening, a dramatic pulse profile change, and a reported glitch of dnu/nu ~1e-4 (ATEL 932) whose amplitude is unprecedented for any neutron star. Using 4 CXO observations between 9/27 and 10/28, we have been able to track the spectral changes, pulse morphology evolution, and provide the first measurement of the spin-down rate and thus magnetic field strength of CXO J1647-45 (ATEL 929). Further analysis of all available X-ray data has brought into question the reality of the reported glitch. The parameters of this glitch factor heavily into the physical interpretation of the outburst and in general, our understanding of the internal structure of magnetars. We are requesting one additional observation to extend our phase-coherent timing solution to confirm the measured spin-down rate and better anchor our ephemeris.

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