Immediate Post-Giant Flare Observations of SGR 1900+14

Details Immediate Post-Giant Flare Observations of SGR 1900+14 Immediate Post-Giant Flare Observations of SGR 1900+14

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000cxo..prop..727k&link_type=abstract

Chandra Proposal ID #02508046

Mathematics

Chandra Proposal Id #02508046

Scientific paper

The Soft Gamma-Ray Repeaters (SGRs) are thought to be magnetars: isolated neutron stars with dipolar magnetic field strengths in excess of 1e14 G. The best evidence for this identification are the "giant flares" of these sources, which are highly super-Eddington and require the confining pressure and reduced photon cross-section of a strong B-field. The 27 August 1998 flare of SGR 1900+14 peaked at L_X > 2e43 erg/s and powered a short-lived synchrotron nebula of 8.5 GHz flux > 0.3 mJy at its peak. Chandra ACIS-S observations of SGR 1900+14 in the near aftermath of its recent flare (GCN 1041) will enable a search for spectral features in the post-flare X-ray emission, which may exhibit ~1e37 erg/s bursts of its own. Strohmayer & Ibrahim (2000) have reported a ~6.4 keV line with XTE observations of SGR 1900+14; detection of this line with ACIS will provide valuable insight into these objects. Coordinated observations with the VLA/VLBA are underway, and will be arranged with RXTE.

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