RXTE Discovery of Pulsations from SGR 0418+5729

Details RXTE Discovery of Pulsations from SGR 0418+5729 RXTE Discovery of Pulsations from SGR 0418+5729

Jun 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009atel.2076....1g&link_type=abstract

The Astronomer's Telegram, #2076

Astronomy and Astrophysics

Astronomy

12

X-Ray, Neutron Stars, Pulsars, Soft Gamma-Ray Repeaters, Transients

Scientific paper

Following the Fermi GBM/Konus/Swift detection of bursts from the new Soft Gamma Repeater SGR 0418+5729 (van der Horst et al. 2009, GCN #9499) we triggered our SGR ToO Program with RXTE. A 6.8 ks RXTE observation started on 2009 June 10, 03:42:56 UT. We detect strong, coherent pulsations from the new SGR in the 2-10 keV PCA data at 0.110152(2) Hz, corresponding to a spin period of 9.0783(1) sec. The pulse morphology is complex showing two asymmetric maxima per cycle.

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