And Back to Quiescence: The Transient AXP XTE J1810-197

Details And Back to Quiescence: The Transient AXP XTE J1810-197 And Back to Quiescence: The Transient AXP XTE J1810-197

Sep 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005cxo..prop.1950h&link_type=abstract

Chandra Proposal ID #07500119

Computer Science

Chandra Proposal Id #07500119

Scientific paper

The 5.5 s pulsar XTE J1810-197 is the first confirmed Transient Anomalous X-ray Pulsar (TAXP), likely a magnetar, a neutron star with a huge magnetic field of 3x10(14) G. It is currently in outburst and is fading rapidly; archival data spanning 24 yr indicate that this is probably a one-time event. Monitoring of its spectrum and pulse profiles during the decay is revealing a wealth of information about emission mechanisms and geometry of a magnetar in outburst. During AO7, we expect that the spectrum and pulse modulation will change markedly as the source returns to quiescence. We propose to observe this transition, to follow the flux, spin, and spectral evolution of XTE J1810-197, and capture for the first time a complete cycle of a TAXP from quiescence, to outburst, and back.

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