Searching for atomic and/or cyclotron features in the Giant Flares decay of SGR 1806-20

Details Searching for atomic and/or cyclotron features in the Giant Flares decay of SGR 1806-20 Searching for atomic and/or cyclotron features in the Giant Flares decay of SGR 1806-20

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004cxo..prop.1856r&link_type=abstract

Chandra Proposal ID #06508198

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Chandra Proposal Id #06508198

Scientific paper

On 2004 December 27th a Giant Flare from SRG1806-20(GCN 2920) was revealed, the 1st ever for this source and the 3rd one from SGRs since 1979.The current event is largely more energetic than the previous ones a rare opportunity to study its decay with the unprecedented spectral resolution of Chandra,allowing,among other thing to study the enviroment of the source through the possible presence of spectral edges/line(similarly to the study performed on GRBs X-ray afterglows).The comparison of the source emission properties before and after the flare (XMM obs.carried out few weeks before the event)will provide an unprecedented opportunity to constrain the magnetar model and the neutron stars crustal properties.The possibility of detecting cyclotron features after the flare will especially be important; in particular,for this source there was evidence for a cyclotron feature around 5 keV,revealed by RXTE during a bursting phase.The HETG has the best available resolution around that energy.

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