New Developments from the Transient AXP XTE J1810-197

Details New Developments from the Transient AXP XTE J1810-197 New Developments from the Transient AXP XTE J1810-197

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006cxo..prop.2164h&link_type=abstract

Chandra Proposal ID #08500205

Computer Science

Chandra Proposal Id #08500205

Scientific paper

The 5.5 s pulsar XTE J1810-197 is the first confirmed Transient Anomalous X-ray Pulsar (TAXP). It has been fading steadily since its only known outburst in 2003. Archival data spanning 25 yr indicates that this is likely a one-time event. Monitoring of its complex spectrum and pulse profiles during the decay is revealing a wealth of information about emission mechanisms and geometry of a magnetar. Surprising radio brightening, 1-3 years after outburst, is unique to this AXP, and suggests either an expanding nebula or transient radio bursts. During AO8, we expect the X-ray spectrum and pulse modulation to change markedly as the source returns to its quiescent state. We propose to follow its flux, spin, and spectral evolution, and search for a radio and X-ray nebula.

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