RXTE Detection of the Spin Period of Swift J1822.3-1606

Details RXTE Detection of the Spin Period of Swift J1822.3-1606 RXTE Detection of the Spin Period of Swift J1822.3-1606

Jul 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011atel.3491....1g&link_type=abstract

The Astronomer's Telegram, #3491

Astronomy and Astrophysics

Astronomy

2

X-Ray, Soft Gamma-Ray Repeater

Scientific paper

RXTE/PCA observed the new source, Swift J1822.3-1606 (Cummings et al. GCN Circ. 12159) on 2011 July 16, for 6.7 ks. We performed a timing analysis on the barycentered data and detected a coherent pulsation at 0.1185149(2) Hz corresponding to 8.4377585 s. Pulsations are clearly visible in the PCA light curve. The peak-to-peak pulsed amplitude in the 2-10 keV band is 0.41. This pulsed fraction is highly unlikely from an SGR source, and very reminiscent of the outburst onset of Swift J1626.6-5156 (Palmer et al.

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