Long term monitoring of the Soft Gamma Repeater SGR 1900+14

Details Long term monitoring of the Soft Gamma Repeater SGR 1900+14 Long term monitoring of the Soft Gamma Repeater SGR 1900+14

Oct 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006xmm..prop..235e&link_type=abstract

XMM-Newton Proposal ID #05064301

Physics

Supernovae, Supernova Remnants, Diffuse (Galactic) Emission And Isolated Neutron Stars, Sgr 1900+14, Xmm-Newton Proposal 05064301

Scientific paper

XMM-Newton observed SGR 1900+14 in September 2005, after almost three years during which no bursts were detected from this SGR. The flux was a factor 2 dimmer than the typical value, but the long term fading of the persistent emission has been interrupted by the recent burst reactivation of the source, as showed by a XMM-Newton TOO carried out in April 2006. We propose to perform a 50 ks observation to constrain changes in the spectrum, pulsed fraction and light curve profile, which are expected in a scenario in which the effects of a twisted magnetosphere are considered, and to establish whether the flux has reached the unexpected low level suggested by recent Swift ``snapshot observations.

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