Soft Gamma-ray Repeaters: The Challenge to a Discovery

Details Soft Gamma-ray Repeaters: The Challenge to a Discovery Soft Gamma-ray Repeaters: The Challenge to a Discovery

Oct 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005xmm..prop..227f&link_type=abstract

XMM-Newton Proposal ID #04062705

Physics

Supernovae, Supernova Remnants, Diffuse (Galactic) Emission And Isolated Neutron Stars, Sgr 0526-66, Sgr 1627-41, Sgr 1806-20, Sgr 1900+14, Sgr1801-23, Xmm-Newton Proposal 04062705

Scientific paper

Soft Gamma-ray Repeaters (SGRs, a.k.a. Magnetars) usually manifest themselves as quiescent X-ray pulsars, as sporadic emitters of bursts of hard X-rays (<100 keV), and as rare emitters of giant flares, reaching photon energies up to 1 MeV. They are not known nor expected to emit gamma-rays in the 0.03-50 GeV range, within the AGILE sensitivity limit. Such a detection would therefore represent a truly exceptional and surprising scientific case, that we propose to study with a triggered observation by XMM-Newton, the most sensitive X-ray observatory available, in order to search for any signature of the gamma-ray emitting event in any of the known timing or spectral properties of these objects.

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